CN113604767A - Hot galvanizing process method for steel pipe - Google Patents
Hot galvanizing process method for steel pipe Download PDFInfo
- Publication number
- CN113604767A CN113604767A CN202110909478.6A CN202110909478A CN113604767A CN 113604767 A CN113604767 A CN 113604767A CN 202110909478 A CN202110909478 A CN 202110909478A CN 113604767 A CN113604767 A CN 113604767A
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- China
- Prior art keywords
- steel pipe
- zinc
- steel
- crown block
- galvanizing
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 689
- 239000010959 steel Substances 0.000 title claims abstract description 689
- 238000005246 galvanizing Methods 0.000 title claims abstract description 135
- 238000000034 method Methods 0.000 title claims abstract description 45
- 239000000725 suspension Substances 0.000 claims abstract description 152
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 142
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 129
- 239000011701 zinc Substances 0.000 claims abstract description 129
- 239000007788 liquid Substances 0.000 claims abstract description 51
- 238000005554 pickling Methods 0.000 claims abstract description 40
- 238000007667 floating Methods 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims description 39
- 239000002904 solvent Substances 0.000 claims description 36
- 238000002161 passivation Methods 0.000 claims description 33
- 239000002893 slag Substances 0.000 claims description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 238000005406 washing Methods 0.000 claims description 27
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 19
- 238000001035 drying Methods 0.000 claims description 19
- 239000008397 galvanized steel Substances 0.000 claims description 19
- 238000007747 plating Methods 0.000 claims description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 238000007605 air drying Methods 0.000 claims description 16
- 238000004806 packaging method and process Methods 0.000 claims description 16
- 238000002791 soaking Methods 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 7
- 239000000498 cooling water Substances 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 5
- 229920000742 Cotton Polymers 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 238000007598 dipping method Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000004140 cleaning Methods 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/26—After-treatment
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/38—Wires; Tubes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating With Molten Metal (AREA)
Abstract
The invention discloses a steel pipe hot galvanizing process, which comprises steel pipe pretreatment, wherein two suspension wires of a crown block are fixed on the surface of a steel pipe, the suspension wires are reserved at the top of the steel pipe by 1 cm when being fixed, the two suspension wires are fixed at two ends of the steel pipe according to the required distance, then the steel pipe is moved to a pickling tank through the crown block, then the steel pipe is placed into the pickling tank through the crown block for pickling, the pickling time is 5-15 minutes, and then the steel pipe is pulled up; according to the invention, after the steel pipe is galvanized, the steel pipe is lifted up firstly and then enters one end of the galvanizing bath, and then the end of the steel pipe which enters the galvanizing bath is lifted up, so that the steel pipe is positioned in the tilting device, workers can clear away zinc dross floating at the top of the galvanizing bath, the condition that the zinc dross can be attached to the surface of the steel pipe is further avoided, and the tilting steel pipe can control residual galvanizing liquid on the surface and inside of the steel pipe, so that waste caused by the fact that the galvanizing liquid is remained on the surface or inside of the steel pipe is avoided.
Description
Technical Field
The invention relates to the technical field of hot galvanizing, in particular to a hot galvanizing process method for a steel pipe.
Background
At present, in order to prolong the service life of steel pipes, hot galvanizing is needed to be carried out on the steel pipes, molten metal and an iron matrix react to generate an alloy layer, so that the matrix and a coating are combined to carry out hot galvanizing, and the steel pipes subjected to hot galvanizing have the advantages of uniform coating, strong adhesive force, long service life and the like.
However, in the process of hot galvanizing of the steel pipe at present, in the process of lifting the steel pipe from the galvanizing bath, zinc dross floating on the top of the galvanizing bath is easy to adhere to the surface of the steel pipe, so that secondary treatment is required to be performed on the steel pipe, and galvanizing liquid is easy to remain in the steel pipe and on the surface of the steel pipe, so that the galvanizing liquid is wasted.
Disclosure of Invention
The invention aims to provide a steel pipe hot galvanizing process method, which solves the problems that in the current steel pipe hot galvanizing process, zinc slag floating on the top of a galvanizing bath is easy to adhere to a steel pipe, galvanizing liquid is easy to remain in the steel pipe and on the surface of the steel pipe, a crown block sling fixes the steel pipe, and the sling is in contact with the steel pipe, so that the surface of the steel pipe can be subjected to zinc leakage plating or incomplete zinc plating.
In order to achieve the purpose, the invention provides the following technical scheme: a hot galvanizing process method for a steel pipe comprises the following steps:
step 1: steel pipe pretreatment: firstly fixing two suspension wires of a crown block and the surface of a steel pipe, reserving 1 cm of the suspension wires at the top of the steel pipe when the suspension wires are fixed, fixing the two suspension wires at two ends of the steel pipe according to a required distance, moving the steel pipe to a pickling tank through the crown block, then placing the steel pipe into the pickling tank through the crown block for pickling, wherein the pickling time is 5-15 minutes, then pulling up the steel pipe, moving the steel pipe to a clear water tank through the crown block for washing, completely soaking the steel pipe in water during washing, moving the steel pipe to a solvent tank through the crown block after washing the steel pipe, placing the steel pipe into the solvent tank for solvent treatment, and finally lifting up a steel pipe control clean solvent and then drying the steel pipe in a drying rack;
step 2: hot galvanizing of the steel pipe: after the steel pipe is dried, the steel pipe is put into a galvanizing bath through a crown block, two transverse plates symmetrical to the two ends of the steel pipe are placed on the two sides of the galvanizing bath before the crown block is placed into the galvanizing bath, the height of the two transverse plates needs to be one higher and one lower, then one end of the steel pipe is placed into the galvanizing bath through the crown block, the steel pipe is in an inclined state, after one end of the steel pipe is contacted with the transverse plates in the galvanizing bath, the other end of the steel pipe is put down through the crown block, the other end of the steel pipe is contacted with the other transverse plate, after the steel pipe is placed stably, the crown block continues to put down the suspension wire, the downward distance of the suspension wire is 0.4-0.6 cm, the suspension wire contacted with the surface of the steel pipe is separated from the steel pipe, the surface of the steel pipe is completely contacted with galvanizing liquid, after the galvanizing time is up, the suspension wire is lifted through the crown block, the suspension wire is contacted with the steel pipe again, in the lifting process of the steel pipe is lifted up and then is put into one end of the galvanizing bath, then lifting one end of the steel pipe into a galvanizing bath, enabling the steel pipe to be in an inclined state when lifted, draining zinc plating liquid inside and on the surface of the steel pipe after the steel pipe is completely lifted, leveling the steel pipe through a crown block, enabling the two ends of the steel pipe to be in a horizontal line, and if the length of the steel pipe changes, changing the positions of the two transverse plates along with the two ends of the steel pipe;
and step 3: cooling the steel pipe: placing the galvanized steel pipe into a cooling tank for cooling, wherein the water temperature of the cooling tank is not more than 60 ℃;
and 4, step 4: passivating the steel pipe: after the steel pipe is cooled, spraying a passivation solution to the steel pipe by using a spray head, after the steel pipe is passivated, air-drying the steel pipe, wherein air-drying is carried out by blowing air, the surface of the steel pipe must be completely air-dried, and a little passivation solution cannot be remained;
and 5: and (3) steel tube packaging: and finally, inspecting the galvanized steel pipe, and packaging and leaving the factory after the quality of the steel pipe is ensured.
Preferably, in step 1, the steel pipe is a steel pipe flange or a steel pipe insert plate member.
Preferably, in step 1, when the length of the steel pipe flange member is less than or equal to 4m, one suspension wire is fixed at the position of 1-1.5m of the left end of the steel pipe, the other suspension wire is fixed at the position of 0.7-1.2m of the right end of the steel pipe, when the length of the steel pipe flange member is greater than 4 and less than or equal to 8m, one suspension wire is fixed at the position of 1.5-2.0m of the left end of the steel pipe, and the other suspension wire is fixed at the position of 1.0-1.5m of the right end of the steel pipe.
Preferably, in step 1, when the length of the steel pipe insert plate is less than or equal to 7m, one suspension wire is fixed at the position of 1.5-2.0m of the left end of the steel pipe, the other suspension wire is fixed at the position of 1.0-1.5m of the right end of the steel pipe, the length of the steel pipe insert plate is greater than 7m and is less than or equal to 9m, one suspension wire is fixed at the position of 2.5-3.0m of the left end of the steel pipe, the other suspension wire is fixed at the position of 2.0-2.5m of the right end of the steel pipe, when the length of the steel pipe insert plate is greater than 9m and is less than or equal to 13.1m, one suspension wire is fixed at the position of 3.0m-3.5m of the left end of the steel pipe, and the other suspension wire is fixed at the position of 2.8-3.2m of the right end of the steel pipe.
Preferably, in step 1, if a plurality of steel pipes are hoisted synchronously, a certain gap is ensured to be kept between the steel pipes, so as to avoid the steel pipes from being attached and overlapped, before the steel pipes are hoisted, the weight of the steel pipes needs to be strictly controlled, and the hoisting weight of the steel pipes each time does not exceed the load.
Preferably, in the step 2, the temperature of the zinc liquid is controlled between 440 ℃ and 460 ℃, the zinc dipping time is controlled between 30 seconds and 60 seconds, when adding zinc into the zinc pot, the zinc ingot is preheated, when adding zinc, the zinc addition of one bundle of zinc is not allowed, the zinc addition is not more than five blocks at most, when adding zinc, the wall of the zinc pot of the zinc ingot is longitudinally attached to the surface and slowly scratched so as to avoid damaging the zinc pot by impact and splashing a large amount of zinc to hurt people, and the iron substances in the zinc liquid are strictly prohibited from falling in so as to prevent a large amount of zinc slag from being generated.
Preferably, in the step 2, when the steel pipe is hoisted, the slag removing tool needs to be manually used to remove the zinc slag floating on the top of the galvanizing bath, and in the process of removing the zinc slag, the slag removing tool needs to be slowly put into the galvanizing bath after the zinc liquid splashes.
Preferably, in step 3, after the steel pipe is cooled, direct manual contact with the surface of the steel pipe or cooling water in a cooling pool is prohibited.
Preferably, in step 4, after the steel pipe is air-dried, careful examination is performed to determine whether the passivation solution remains on the surface of the steel pipe, and if the passivation solution is found to be timely treated, the passivation solution is directly wiped by hands.
Preferably, in step 5, once the outer surface of the steel pipe after being wrapped by the steel pipe is polluted, the steel pipe can be piled up after being wiped clean by clean cotton sand, if the pipe is in a condition, the water in the pipe needs to be controlled completely, no person is allowed to step on the pipe by feet, and the appearance quality of the galvanized pipe needs to be maintained.
Compared with the prior art, the invention has the beneficial effects that:
1. after the steel pipe is galvanized, the steel pipe is lifted up firstly and then enters one end of a galvanizing bath, and then the end of the steel pipe which enters the galvanizing bath is lifted up, so that the steel pipe is positioned in an inclined device, workers can clear zinc dross floating at the top of the galvanizing bath, the condition that the zinc dross can be attached to the surface of the steel pipe is avoided, and the inclined steel pipe can control residual galvanizing liquid on the surface and inside of the steel pipe, so that the waste caused by the fact that the galvanizing liquid is remained on the surface or inside of the steel pipe is avoided;
2. according to the invention, two transverse plates for supporting two ends of the steel pipe are arranged in the galvanizing bath, and a space with the height of 1 cm is reserved for the suspension wires on the surface of the steel pipe, so that the steel pipe can be supported by the transverse plates after entering the galvanizing bath, and the suspension wires can continuously descend by 0.4-0.6 cm, so that the surface of the steel pipe is not contacted with the suspension wires, the surface of the steel pipe can be contacted with the galvanizing solution, the condition of zinc leakage or incomplete zinc plating on the surface of the steel pipe due to the contact with the suspension wires is avoided, and the quality of the galvanized steel pipe is effectively ensured.
Detailed Description
The present invention will now be described in more detail by way of examples, which are given by way of illustration only and are not intended to limit the scope of the present invention in any way.
The invention provides a technical scheme that: a hot galvanizing process method for a steel pipe comprises the following steps:
step 1: steel pipe pretreatment: firstly fixing two suspension wires of a crown block and the surface of a steel pipe, reserving 1 cm of the suspension wires at the top of the steel pipe when the suspension wires are fixed, fixing the two suspension wires at two ends of the steel pipe according to a required distance, moving the steel pipe to a pickling tank through the crown block, then placing the steel pipe into the pickling tank through the crown block for pickling, wherein the pickling time is 5-15 minutes, then pulling up the steel pipe, moving the steel pipe to a clear water tank through the crown block for washing, completely soaking the steel pipe in water during washing, moving the steel pipe to a solvent tank through the crown block after washing the steel pipe, placing the steel pipe into the solvent tank for solvent treatment, and finally lifting up a steel pipe control clean solvent and then drying the steel pipe in a drying rack;
step 2: hot galvanizing of the steel pipe: after the steel pipe is dried, the steel pipe is put into a galvanizing bath through a crown block, two transverse plates symmetrical to the two ends of the steel pipe are placed on the two sides of the galvanizing bath before the crown block is placed into the galvanizing bath, the height of the two transverse plates needs to be one higher and one lower, then one end of the steel pipe is placed into the galvanizing bath through the crown block, the steel pipe is in an inclined state, after one end of the steel pipe is contacted with the transverse plates in the galvanizing bath, the other end of the steel pipe is put down through the crown block, the other end of the steel pipe is contacted with the other transverse plate, after the steel pipe is placed stably, the crown block continues to put down the suspension wire, the downward distance of the suspension wire is 0.4-0.6 cm, the suspension wire contacted with the surface of the steel pipe is separated from the steel pipe, the surface of the steel pipe is completely contacted with galvanizing liquid, after the galvanizing time is up, the suspension wire is lifted through the crown block, the suspension wire is contacted with the steel pipe again, in the lifting process of the steel pipe is lifted up and then is put into one end of the galvanizing bath, then lifting one end of the steel pipe into a galvanizing bath, enabling the steel pipe to be in an inclined state when lifted, draining zinc plating liquid inside and on the surface of the steel pipe after the steel pipe is completely lifted, leveling the steel pipe through a crown block, enabling the two ends of the steel pipe to be in a horizontal line, and if the length of the steel pipe changes, changing the positions of the two transverse plates along with the two ends of the steel pipe;
and step 3: cooling the steel pipe: placing the galvanized steel pipe into a cooling tank for cooling, wherein the water temperature of the cooling tank is not more than 60 ℃;
and 4, step 4: passivating the steel pipe: after the steel pipe is cooled, spraying a passivation solution to the steel pipe by using a spray head, after the steel pipe is passivated, air-drying the steel pipe, wherein air-drying is carried out by blowing air, the surface of the steel pipe must be completely air-dried, and a little passivation solution cannot be remained;
and 5: and (3) steel tube packaging: and finally, inspecting the galvanized steel pipe, and packaging and leaving the factory after the quality of the steel pipe is ensured.
The first embodiment is as follows:
the steel pipe pretreatment comprises the steps of firstly fixing two suspension wires of a crown block with the surface of a steel pipe, reserving 1 cm of the suspension wires at the top of the steel pipe when the suspension wires are fixed, fixing the two suspension wires at two ends of the steel pipe according to a required distance, moving the steel pipe to a pickling tank through the crown block, then placing the steel pipe into the pickling tank through the crown block for pickling, wherein the pickling time is 5-15 minutes, then pulling up the steel pipe, moving the steel pipe to a clear water tank through the crown block for washing, completely soaking the steel pipe in water during washing, moving the steel pipe to a solvent tank through the crown block after washing the steel pipe, placing the steel pipe into the solvent tank for solvent treatment, finally lifting up a steel cleaning control solvent, then placing the steel pipe into a drying rack for drying, then carrying out hot galvanizing on the steel pipe, placing the steel pipe into a galvanizing bath through the crown block after drying, placing the steel pipe into the galvanizing bath, placing two transverse plates symmetrical to two ends of the steel pipe on two sides in the galvanizing bath through the crown block, the height of the two transverse plates needs to be one higher and one lower, then one end of the steel pipe is firstly placed into a galvanizing pool through a crown block, the steel pipe is in an inclined state, after one end of the steel pipe is contacted with the transverse plates in the galvanizing pool, the other end of the steel pipe is put down through the crown block and is contacted with the other transverse plate, after the steel pipe is stably placed, the crown block continuously puts down a suspension wire, the downward distance of the suspension wire is 0.4-0.6 cm, the suspension wire contacted with the surface of the steel pipe is separated from the steel pipe, the surface of the steel pipe is completely contacted with galvanizing liquid, after the galvanizing time is up, the suspension wire is lifted through the crown block, the suspension wire is contacted with the steel pipe again, in the lifting process of the suspension wire, the steel pipe is firstly lifted and then placed into one end of the galvanizing pool, then the steel pipe is lifted and is firstly placed into one end of the galvanizing pool, the steel pipe is in an inclined state when being lifted, and after the steel pipe is completely lifted, controlling the zinc plating liquid inside and on the surface of the steel pipe to be dry, leveling the steel pipe through a crown block, enabling the two ends of the steel pipe to be in a horizontal line, if the length of the steel pipe changes, changing the positions of two transverse plates along with the two ends of the steel pipe, cooling the steel pipe, putting the galvanized steel pipe into a cooling tank, cooling the steel pipe, enabling the temperature of the cooling tank to be not more than 60 ℃, then passivating the steel pipe, spraying the passivation liquid on the steel pipe through a spray head after the steel pipe is cooled, after the steel pipe is passivated, air-drying the steel pipe, adopting air-drying for air-drying, completely air-drying the surface of the steel pipe, not leaving a little passivation liquid, finally packaging the steel pipe, finally inspecting the galvanized steel pipe, and packaging and leaving a factory after the quality of the steel pipe is ensured.
Example two:
in the first embodiment, the following steps are added:
in step 1, the steel pipe is a steel pipe flange or a steel pipe insert plate component, when the length of the steel pipe flange component is less than or equal to 4m, one suspension wire is fixed at the position of 1-1.5m at the left end of the steel pipe, the other suspension wire is fixed at the position of 0.7-1.2m at the right end of the steel pipe, when the length of the steel pipe flange component is more than 4 and less than or equal to 8m, one suspension wire is fixed at the position of 1.5-2.0m at the left end of the steel pipe, the other suspension wire is fixed at the position of 1.0-1.5m at the right end of the steel pipe, when the length of the steel pipe insert plate is more than 7m and less than or equal to 9m, one suspension wire is fixed at the position of 2.5-3.0m at the left end of the steel pipe, the other suspension wire is fixed at the position of 2.0-2.5m at the right end of the steel pipe, when the length of the steel pipe inserting plate is more than 9m and less than or equal to 13.1m, one suspension wire is fixed at the position of 3.0-3.5 m at the left end of the steel pipe, the other suspension wire is fixed at the position of 2.8-3.2m at the right end of the steel pipe, if a plurality of steel pipes are hoisted synchronously, a certain gap is kept between the steel pipes, the steel pipes are prevented from being attached and overlapped, the weight of the steel pipes is strictly controlled before the steel pipes are hoisted, and the hoisting weight of the steel pipes each time does not exceed the load.
The steel pipe pretreatment, firstly fixing two suspension wires of a crown block and the surface of a steel pipe, when the suspension wires are fixed, reserving 1 cm of the suspension wires at the top of the steel pipe, fixing the two suspension wires at two ends of the steel pipe according to a required distance, then moving the steel pipe to a pickling tank through the crown block, then placing the steel pipe into the pickling tank through the crown block for pickling, wherein the pickling time is 5-15 minutes, then pulling up the steel pipe, moving the steel pipe to a clean water tank through the crown block for washing, completely soaking the steel pipe in water during washing, moving the steel pipe to a solvent tank through the crown block after washing the steel pipe, placing the steel pipe into the solvent tank for solvent treatment, finally lifting up a steel cleaning control solvent, then placing the steel pipe into a drying rack for drying, wherein the steel pipe is a steel pipe flange or a steel pipe inserting plate component, and when the length of the steel pipe flange component is less than or equal to 4m, one suspension wire is fixed at the left end of the steel pipe by 1-1.5m, the other suspension wire is fixed at the position of 0.7-1.2m at the right end of the steel pipe, the length of the steel pipe flange component is more than 4 and is less than or equal to 8m, one suspension wire is fixed at the position of 1.5-2.0m at the left end of the steel pipe, the other suspension wire is fixed at the position of 1.0-1.5m at the right end of the steel pipe, the length of the steel pipe inserting plate is less than or equal to 7m, one suspension wire is fixed at the position of 1.5-2.0m at the left end of the steel pipe, the other suspension wire is fixed at the position of 2.0-2.5m at the right end of the steel pipe, the length of the steel pipe inserting plate is more than 7m and is less than or equal to 9m, one suspension wire is fixed at the position of 3.0-3.5 m at the left end of the steel pipe, the other suspension wire is fixed at the position of 2.8-3.2m at the right end of the steel pipe, if a plurality of steel pipes are hoisted synchronously, a certain gap is ensured to be kept between the steel pipes to avoid the steel pipes from being attached and overlapped, before the steel pipes are hoisted, the weight of the steel pipes is strictly controlled, the weight of the steel pipes cannot exceed the load each time, then the steel pipes are hot-galvanized, after the steel pipes are dried, the steel pipes are placed into a galvanizing pool through a crown block, before the crown block is placed into the galvanizing pool, two transverse plates symmetrical to the two ends of the steel pipes are placed on the two sides inside the galvanizing pool, the height of the two transverse plates needs to be one higher or one lower, then one end of the steel pipe is placed into the galvanizing pool through the crown block, the steel pipe is in an inclined state, after one end of the steel pipe is contacted with the transverse plates inside the galvanizing pool, the other end of the steel pipe is placed through the crown block, the other end of the steel pipe is contacted with the other transverse plate, after the steel pipes are placed stably, a hoisting wire is continuously downwards, the hoisting wire is downwards spaced by 0.4-0.6 cm, at the moment, the suspension wire contacted with the surface of the steel pipe is separated from the steel pipe, the surface of the steel pipe is completely contacted with the galvanizing liquid, after the galvanizing time is up, the suspension wire is lifted by a crown block, the suspension wire is contacted with the steel pipe again, in the lifting process of the suspension wire, the steel pipe is lifted firstly and then enters one end of the galvanizing pool, then the steel pipe is lifted firstly and enters one end of the galvanizing pool, the steel pipe is in an inclined state when lifted, after the steel pipe is completely lifted, the interior and the surface of the steel pipe are drained, the steel pipe is flattened by the crown block, the two ends of the steel pipe are in horizontal line, if the length of the steel pipe is changed, the positions of two transverse plates are changed along with the two ends of the steel pipe, then the steel pipe is cooled, the galvanized steel pipe is placed into a cooling pool to be cooled, the water temperature of the cooling pool is not more than 60 ℃, then the steel pipe is passivated, after the cooling of the steel pipe is finished, the passivation liquid is sprayed to the steel pipe by a spray head, and after the steel pipe is passivated, the steel pipe needs to be air-dried, the air-drying adopts air-drying, the surface of the steel pipe needs to be completely air-dried, a little passivation solution does not remain, the steel pipe is finally packaged, the galvanized steel pipe is finally inspected, and the steel pipe is packaged and delivered out of a factory after the quality of the steel pipe is ensured.
Example three:
in the second embodiment, the following steps are added:
in the step 2, the temperature of the zinc liquid is controlled between 440 and 460 ℃, the zinc dipping time is controlled between 30 and 60 seconds, when adding zinc into a zinc pot, zinc ingots are preheated, one bundle of zinc is not allowed to be added when adding zinc, the zinc is added at most five blocks, the wall of the zinc pot of the zinc ingot is slowly stuck to the surface longitudinally when adding zinc, so as to avoid damaging the zinc pot by impact and splashing a large amount of zinc to hurt people, iron substances in the zinc liquid are strictly forbidden to fall into the zinc liquid so as to prevent a large amount of zinc slag from being generated, when lifting a steel pipe, a slag removing tool needs to be manually used for removing the zinc slag floating on the top of the zinc plating bath, and in the zinc slag removing process, the zinc liquid is noticed to splash, and the slag removing tool needs to be slowly put into the zinc plating bath.
The steel pipe pretreatment, firstly fixing two suspension wires of a crown block and the surface of a steel pipe, when the suspension wires are fixed, reserving 1 cm of the suspension wires at the top of the steel pipe, fixing the two suspension wires at two ends of the steel pipe according to a required distance, then moving the steel pipe to a pickling tank through the crown block, then placing the steel pipe into the pickling tank through the crown block for pickling, wherein the pickling time is 5-15 minutes, then pulling up the steel pipe, moving the steel pipe to a clean water tank through the crown block for washing, completely soaking the steel pipe in water during washing, moving the steel pipe to a solvent tank through the crown block after washing the steel pipe, placing the steel pipe into the solvent tank for solvent treatment, finally lifting up a steel cleaning control solvent, then placing the steel pipe into a drying rack for drying, wherein the steel pipe is a steel pipe flange or a steel pipe inserting plate component, and when the length of the steel pipe flange component is less than or equal to 4m, one suspension wire is fixed at the left end of the steel pipe by 1-1.5m, the other suspension wire is fixed at the position of 0.7-1.2m at the right end of the steel pipe, the length of the steel pipe flange component is more than 4 and is less than or equal to 8m, one suspension wire is fixed at the position of 1.5-2.0m at the left end of the steel pipe, the other suspension wire is fixed at the position of 1.0-1.5m at the right end of the steel pipe, the length of the steel pipe inserting plate is less than or equal to 7m, one suspension wire is fixed at the position of 1.5-2.0m at the left end of the steel pipe, the other suspension wire is fixed at the position of 2.0-2.5m at the right end of the steel pipe, the length of the steel pipe inserting plate is more than 7m and is less than or equal to 9m, one suspension wire is fixed at the position of 3.0-3.5 m at the left end of the steel pipe, the other suspension wire is fixed at the position of 2.8-3.2m at the right end of the steel pipe, if a plurality of steel pipes are hoisted synchronously, a certain gap is ensured to be kept between the steel pipes to avoid the steel pipes from being attached and overlapped, before the steel pipes are hoisted, the weight of the steel pipes is strictly controlled, the weight of the steel pipes cannot exceed the load each time, then the steel pipes are hot-galvanized, after the steel pipes are dried, the steel pipes are placed into a galvanizing pool through a crown block, before the crown block is placed into the galvanizing pool, two transverse plates symmetrical to the two ends of the steel pipes are placed on the two sides inside the galvanizing pool, the height of the two transverse plates needs to be one higher or one lower, then one end of the steel pipe is placed into the galvanizing pool through the crown block, the steel pipe is in an inclined state, after one end of the steel pipe is contacted with the transverse plates inside the galvanizing pool, the other end of the steel pipe is placed through the crown block, the other end of the steel pipe is contacted with the other transverse plate, after the steel pipes are placed stably, a hoisting wire is continuously downwards, the hoisting wire is downwards spaced by 0.4-0.6 cm, at the moment, the suspension wires contacted with the surface of the steel pipe are separated from the steel pipe, the surface of the steel pipe is completely contacted with the galvanizing liquid, after the galvanizing time is up, the suspension wires are lifted by a crown block, the suspension wires are contacted with the steel pipe again, in the lifting process of the suspension wires, the steel pipe is lifted firstly and then enters one end of the galvanizing pool, then the steel pipe is lifted firstly and enters one end of the galvanizing pool, the steel pipe is in an inclined state when lifted, after the steel pipe is completely lifted, the interior and the surface of the steel pipe are dried, the steel pipe is flattened by the crown block, the two ends of the steel pipe are in a horizontal line, if the length of the steel pipe is changed, the positions of two transverse plates are changed along with the two ends of the steel pipe, the temperature of the zinc liquid is controlled between 440 ℃ and 460 ℃, the galvanizing time is controlled between 30-60 seconds, when the zinc is added into the zinc pot, the zinc ingot is preheated firstly, one bundle of zinc is not allowed to be added, and the zinc is not more than five blocks each time, when adding zinc, the wall of the zinc pot of the zinc ingot is stuck to the surface longitudinally and slowly scratched so as to avoid damaging the zinc pot by impact and hurting people by splashing a large amount of zinc, iron substances are strictly prohibited from falling into the zinc liquid so as to prevent a large amount of zinc slag from being generated, when the steel pipe is hoisted, a slag removing tool is required to be manually used, removing the zinc dross floating on the top of the galvanizing bath, paying attention to the splashing of zinc liquid in the zinc dross removing process, slowly putting a dross removing tool into the galvanizing bath, then cooling the steel pipe, putting the galvanized steel pipe into a cooling bath for cooling, keeping the water temperature of the cooling bath not more than 60 ℃, then passivating the steel pipe, cooling the steel pipe, the method comprises the steps of spraying a passivation solution to a steel pipe by using a spray head, airing the steel pipe after the steel pipe is passivated, adopting air blowing for air drying, completely airing the surface of the steel pipe without leaving a little passivation solution, finally packaging the steel pipe, finally inspecting the galvanized steel pipe, and packaging and leaving the factory after the quality of the steel pipe is ensured.
Example four:
in the third embodiment, the following steps are added:
in step 3, after the steel pipe is cooled, the direct contact of the surface of the steel pipe or cooling water in a cooling pool by hands is forbidden.
The steel pipe pretreatment, firstly fixing two suspension wires of a crown block and the surface of a steel pipe, when the suspension wires are fixed, reserving 1 cm of the suspension wires at the top of the steel pipe, fixing the two suspension wires at two ends of the steel pipe according to a required distance, then moving the steel pipe to a pickling tank through the crown block, then placing the steel pipe into the pickling tank through the crown block for pickling, wherein the pickling time is 5-15 minutes, then pulling up the steel pipe, moving the steel pipe to a clean water tank through the crown block for washing, completely soaking the steel pipe in water during washing, moving the steel pipe to a solvent tank through the crown block after washing the steel pipe, placing the steel pipe into the solvent tank for solvent treatment, finally lifting up a steel cleaning control solvent, then placing the steel pipe into a drying rack for drying, wherein the steel pipe is a steel pipe flange or a steel pipe inserting plate component, and when the length of the steel pipe flange component is less than or equal to 4m, one suspension wire is fixed at the left end of the steel pipe by 1-1.5m, the other suspension wire is fixed at the position of 0.7-1.2m at the right end of the steel pipe, the length of the steel pipe flange component is more than 4 and is less than or equal to 8m, one suspension wire is fixed at the position of 1.5-2.0m at the left end of the steel pipe, the other suspension wire is fixed at the position of 1.0-1.5m at the right end of the steel pipe, the length of the steel pipe inserting plate is less than or equal to 7m, one suspension wire is fixed at the position of 1.5-2.0m at the left end of the steel pipe, the other suspension wire is fixed at the position of 2.0-2.5m at the right end of the steel pipe, the length of the steel pipe inserting plate is more than 7m and is less than or equal to 9m, one suspension wire is fixed at the position of 3.0-3.5 m at the left end of the steel pipe, the other suspension wire is fixed at the position of 2.8-3.2m at the right end of the steel pipe, if a plurality of steel pipes are hoisted synchronously, a certain gap is ensured to be kept between the steel pipes to avoid the steel pipes from being attached and overlapped, before the steel pipes are hoisted, the weight of the steel pipes is strictly controlled, the weight of the steel pipes cannot exceed the load each time, then the steel pipes are hot-galvanized, after the steel pipes are dried, the steel pipes are placed into a galvanizing pool through a crown block, before the crown block is placed into the galvanizing pool, two transverse plates symmetrical to the two ends of the steel pipes are placed on the two sides inside the galvanizing pool, the height of the two transverse plates needs to be one higher or one lower, then one end of the steel pipe is placed into the galvanizing pool through the crown block, the steel pipe is in an inclined state, after one end of the steel pipe is contacted with the transverse plates inside the galvanizing pool, the other end of the steel pipe is placed through the crown block, the other end of the steel pipe is contacted with the other transverse plate, after the steel pipes are placed stably, a hoisting wire is continuously downwards, the hoisting wire is downwards spaced by 0.4-0.6 cm, at the moment, the suspension wires contacted with the surface of the steel pipe are separated from the steel pipe, the surface of the steel pipe is completely contacted with the galvanizing liquid, after the galvanizing time is up, the suspension wires are lifted by a crown block, the suspension wires are contacted with the steel pipe again, in the lifting process of the suspension wires, the steel pipe is lifted firstly and then enters one end of the galvanizing pool, then the steel pipe is lifted firstly and enters one end of the galvanizing pool, the steel pipe is in an inclined state when lifted, after the steel pipe is completely lifted, the interior and the surface of the steel pipe are dried, the steel pipe is flattened by the crown block, the two ends of the steel pipe are in a horizontal line, if the length of the steel pipe is changed, the positions of two transverse plates are changed along with the two ends of the steel pipe, the temperature of the zinc liquid is controlled between 440 ℃ and 460 ℃, the galvanizing time is controlled between 30-60 seconds, when the zinc is added into the zinc pot, the zinc ingot is preheated firstly, one bundle of zinc is not allowed to be added, and the zinc is not more than five blocks each time, when adding zinc, the wall of a zinc pot of a zinc ingot is stuck to the surface longitudinally and slowly scratched so as to avoid damaging the zinc pot by impact and splashing a large amount of zinc to hurt people, iron substances in zinc liquid are strictly forbidden to fall in so as to prevent a large amount of zinc slag from being generated, when a steel pipe is hoisted, a slag removing tool needs to be manually used for removing zinc slag floating at the top of a zinc plating pool, the zinc slag removing process is noticed that the zinc liquid splashes, the slag removing tool needs to be slowly placed into the zinc plating pool, then the steel pipe is cooled, the galvanized steel pipe is placed into a cooling pool for cooling, the water temperature of the cooling pool is not more than 60 ℃, after the steel pipe is cooled, the manual direct contact with the surface of the steel pipe or cooling water in the cooling pool is forbidden, then the steel pipe is passivated, after the steel pipe is cooled, a passivation liquid is sprayed on the steel pipe by a spray nozzle, the steel pipe needs to be air-dried after being passivated, the air-dried by air-drying, the surface of the steel pipe needs to be completely air-dried without leaving a little passivation liquid, and finally, packaging the steel pipe, and finally inspecting the galvanized steel pipe to ensure the quality of the steel pipe and then packaging and leaving the factory.
Example five:
in the fourth example, the following steps were added:
in step 4, after the steel pipe is air-dried, careful examination is carried out to determine whether the passivation solution remains on the surface of the steel pipe, and if the passivation solution is found to be timely treated, the passivation solution is directly wiped by hands.
The steel pipe pretreatment, firstly fixing two suspension wires of a crown block and the surface of a steel pipe, when the suspension wires are fixed, reserving 1 cm of the suspension wires at the top of the steel pipe, fixing the two suspension wires at two ends of the steel pipe according to a required distance, then moving the steel pipe to a pickling tank through the crown block, then placing the steel pipe into the pickling tank through the crown block for pickling, wherein the pickling time is 5-15 minutes, then pulling up the steel pipe, moving the steel pipe to a clean water tank through the crown block for washing, completely soaking the steel pipe in water during washing, moving the steel pipe to a solvent tank through the crown block after washing the steel pipe, placing the steel pipe into the solvent tank for solvent treatment, finally lifting up a steel cleaning control solvent, then placing the steel pipe into a drying rack for drying, wherein the steel pipe is a steel pipe flange or a steel pipe inserting plate component, and when the length of the steel pipe flange component is less than or equal to 4m, one suspension wire is fixed at the left end of the steel pipe by 1-1.5m, the other suspension wire is fixed at the position of 0.7-1.2m at the right end of the steel pipe, the length of the steel pipe flange component is more than 4 and is less than or equal to 8m, one suspension wire is fixed at the position of 1.5-2.0m at the left end of the steel pipe, the other suspension wire is fixed at the position of 1.0-1.5m at the right end of the steel pipe, the length of the steel pipe inserting plate is less than or equal to 7m, one suspension wire is fixed at the position of 1.5-2.0m at the left end of the steel pipe, the other suspension wire is fixed at the position of 2.0-2.5m at the right end of the steel pipe, the length of the steel pipe inserting plate is more than 7m and is less than or equal to 9m, one suspension wire is fixed at the position of 3.0-3.5 m at the left end of the steel pipe, the other suspension wire is fixed at the position of 2.8-3.2m at the right end of the steel pipe, if a plurality of steel pipes are hoisted synchronously, a certain gap is ensured to be kept between the steel pipes to avoid the steel pipes from being attached and overlapped, before the steel pipes are hoisted, the weight of the steel pipes is strictly controlled, the weight of the steel pipes cannot exceed the load each time, then the steel pipes are hot-galvanized, after the steel pipes are dried, the steel pipes are placed into a galvanizing pool through a crown block, before the crown block is placed into the galvanizing pool, two transverse plates symmetrical to the two ends of the steel pipes are placed on the two sides inside the galvanizing pool, the height of the two transverse plates needs to be one higher or one lower, then one end of the steel pipe is placed into the galvanizing pool through the crown block, the steel pipe is in an inclined state, after one end of the steel pipe is contacted with the transverse plates inside the galvanizing pool, the other end of the steel pipe is placed through the crown block, the other end of the steel pipe is contacted with the other transverse plate, after the steel pipes are placed stably, a hoisting wire is continuously downwards, the hoisting wire is downwards spaced by 0.4-0.6 cm, at the moment, the suspension wires contacted with the surface of the steel pipe are separated from the steel pipe, the surface of the steel pipe is completely contacted with the galvanizing liquid, after the galvanizing time is up, the suspension wires are lifted by a crown block, the suspension wires are contacted with the steel pipe again, in the lifting process of the suspension wires, the steel pipe is lifted firstly and then enters one end of the galvanizing pool, then the steel pipe is lifted firstly and enters one end of the galvanizing pool, the steel pipe is in an inclined state when lifted, after the steel pipe is completely lifted, the interior and the surface of the steel pipe are dried, the steel pipe is flattened by the crown block, the two ends of the steel pipe are in a horizontal line, if the length of the steel pipe is changed, the positions of two transverse plates are changed along with the two ends of the steel pipe, the temperature of the zinc liquid is controlled between 440 ℃ and 460 ℃, the galvanizing time is controlled between 30-60 seconds, when the zinc is added into the zinc pot, the zinc ingot is preheated firstly, one bundle of zinc is not allowed to be added, and the zinc is not more than five blocks each time, when adding zinc, the wall of a zinc pot of a zinc ingot is stuck to the surface longitudinally and slowly scratched so as to avoid damaging the zinc pot by impact and splashing a large amount of zinc to hurt people, iron substances in zinc liquid are strictly forbidden to fall in so as to prevent a large amount of zinc slag from being generated, when a steel pipe is hoisted, a slag removing tool needs to be manually used for removing zinc slag floating at the top of a zinc plating pool, the zinc slag removing process is noticed that the zinc liquid splashes, the slag removing tool needs to be slowly placed into the zinc plating pool, then the steel pipe is cooled, the galvanized steel pipe is placed into a cooling pool for cooling, the water temperature of the cooling pool is not more than 60 ℃, after the steel pipe is cooled, the manual direct contact with the surface of the steel pipe or cooling water in the cooling pool is forbidden, then the steel pipe is passivated, after the steel pipe is cooled, a passivation liquid is sprayed on the steel pipe by a spray nozzle, the steel pipe needs to be air-dried after being passivated, the air-dried by air-drying, the surface of the steel pipe needs to be completely air-dried without leaving a little passivation liquid, after the steel pipe is air-dried, carefully checking whether the passivation solution remains on the surface of the steel pipe, if the passivation solution is found to be timely treated, directly wiping the passivation solution by hands strictly forbidden, finally packaging the steel pipe, finally inspecting the galvanized steel pipe, and packaging and leaving the factory after the quality of the steel pipe is ensured.
Example six:
in the fifth example, the following steps were added:
in step 5, once the outer surface of the steel pipe after the steel pipe is packaged is polluted, the steel pipe can be stacked after being smeared by clean cotton sand, if the pipe is in a small pipe, the water in the pipe needs to be controlled completely, no person is allowed to step on the pipe by feet, and the outer surface quality of the galvanized pipe needs to be maintained.
The steel pipe pretreatment, firstly fixing two suspension wires of a crown block and the surface of a steel pipe, when the suspension wires are fixed, reserving 1 cm of the suspension wires at the top of the steel pipe, fixing the two suspension wires at two ends of the steel pipe according to a required distance, then moving the steel pipe to a pickling tank through the crown block, then placing the steel pipe into the pickling tank through the crown block for pickling, wherein the pickling time is 5-15 minutes, then pulling up the steel pipe, moving the steel pipe to a clean water tank through the crown block for washing, completely soaking the steel pipe in water during washing, moving the steel pipe to a solvent tank through the crown block after washing the steel pipe, placing the steel pipe into the solvent tank for solvent treatment, finally lifting up a steel cleaning control solvent, then placing the steel pipe into a drying rack for drying, wherein the steel pipe is a steel pipe flange or a steel pipe inserting plate component, and when the length of the steel pipe flange component is less than or equal to 4m, one suspension wire is fixed at the left end of the steel pipe by 1-1.5m, the other suspension wire is fixed at the position of 0.7-1.2m at the right end of the steel pipe, the length of the steel pipe flange component is more than 4 and is less than or equal to 8m, one suspension wire is fixed at the position of 1.5-2.0m at the left end of the steel pipe, the other suspension wire is fixed at the position of 1.0-1.5m at the right end of the steel pipe, the length of the steel pipe inserting plate is less than or equal to 7m, one suspension wire is fixed at the position of 1.5-2.0m at the left end of the steel pipe, the other suspension wire is fixed at the position of 2.0-2.5m at the right end of the steel pipe, the length of the steel pipe inserting plate is more than 7m and is less than or equal to 9m, one suspension wire is fixed at the position of 3.0-3.5 m at the left end of the steel pipe, the other suspension wire is fixed at the position of 2.8-3.2m at the right end of the steel pipe, if a plurality of steel pipes are hoisted synchronously, a certain gap is ensured to be kept between the steel pipes to avoid the steel pipes from being attached and overlapped, before the steel pipes are hoisted, the weight of the steel pipes is strictly controlled, the weight of the steel pipes cannot exceed the load each time, then the steel pipes are hot-galvanized, after the steel pipes are dried, the steel pipes are placed into a galvanizing pool through a crown block, before the crown block is placed into the galvanizing pool, two transverse plates symmetrical to the two ends of the steel pipes are placed on the two sides inside the galvanizing pool, the height of the two transverse plates needs to be one higher or one lower, then one end of the steel pipe is placed into the galvanizing pool through the crown block, the steel pipe is in an inclined state, after one end of the steel pipe is contacted with the transverse plates inside the galvanizing pool, the other end of the steel pipe is placed through the crown block, the other end of the steel pipe is contacted with the other transverse plate, after the steel pipes are placed stably, a hoisting wire is continuously downwards, the hoisting wire is downwards spaced by 0.4-0.6 cm, at the moment, the suspension wires contacted with the surface of the steel pipe are separated from the steel pipe, the surface of the steel pipe is completely contacted with the galvanizing liquid, after the galvanizing time is up, the suspension wires are lifted by a crown block, the suspension wires are contacted with the steel pipe again, in the lifting process of the suspension wires, the steel pipe is lifted firstly and then enters one end of the galvanizing pool, then the steel pipe is lifted firstly and enters one end of the galvanizing pool, the steel pipe is in an inclined state when lifted, after the steel pipe is completely lifted, the interior and the surface of the steel pipe are dried, the steel pipe is flattened by the crown block, the two ends of the steel pipe are in a horizontal line, if the length of the steel pipe is changed, the positions of two transverse plates are changed along with the two ends of the steel pipe, the temperature of the zinc liquid is controlled between 440 ℃ and 460 ℃, the galvanizing time is controlled between 30-60 seconds, when the zinc is added into the zinc pot, the zinc ingot is preheated firstly, one bundle of zinc is not allowed to be added, and the zinc is not more than five blocks each time, when adding zinc, the wall of a zinc pot of a zinc ingot is stuck to the surface longitudinally and slowly scratched so as to avoid damaging the zinc pot by impact and splashing a large amount of zinc to hurt people, iron substances in zinc liquid are strictly forbidden to fall in so as to prevent a large amount of zinc slag from being generated, when a steel pipe is hoisted, a slag removing tool needs to be manually used for removing zinc slag floating at the top of a zinc plating pool, the zinc slag removing process is noticed that the zinc liquid splashes, the slag removing tool needs to be slowly placed into the zinc plating pool, then the steel pipe is cooled, the galvanized steel pipe is placed into a cooling pool for cooling, the water temperature of the cooling pool is not more than 60 ℃, after the steel pipe is cooled, the manual direct contact with the surface of the steel pipe or cooling water in the cooling pool is forbidden, then the steel pipe is passivated, after the steel pipe is cooled, a passivation liquid is sprayed on the steel pipe by a spray nozzle, the steel pipe needs to be air-dried after being passivated, the air-dried by air-drying, the surface of the steel pipe needs to be completely air-dried without leaving a little passivation liquid, after the steel pipe is air-dried, carefully checking whether passivation solution remains on the surface of the steel pipe, if the passivation solution is found to be timely treated, directly wiping the passivation solution by hands strictly forbidden, finally packaging the steel pipe, finally inspecting the galvanized steel pipe, ensuring the quality of the steel pipe, packaging and leaving the factory, once the outer surface of the steel pipe after being packaged by the steel pipe causes pollution, cleaning the outer surface by clean cotton sand, stacking the steel pipe, controlling water in the pipe to be clean if a small pipe is in a condition, not allowing any person to step on the pipe by feet, and keeping the appearance quality of the galvanized pipe.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A steel pipe hot galvanizing process method is characterized in that: the method comprises the following steps:
step 1: steel pipe pretreatment: firstly fixing two suspension wires of a crown block and the surface of a steel pipe, reserving 1 cm of the suspension wires at the top of the steel pipe when the suspension wires are fixed, fixing the two suspension wires at two ends of the steel pipe according to a required distance, moving the steel pipe to a pickling tank through the crown block, then placing the steel pipe into the pickling tank through the crown block for pickling, wherein the pickling time is 5-15 minutes, then pulling up the steel pipe, moving the steel pipe to a clear water tank through the crown block for washing, completely soaking the steel pipe in water during washing, moving the steel pipe to a solvent tank through the crown block after washing the steel pipe, placing the steel pipe into the solvent tank for solvent treatment, and finally lifting up a steel pipe control clean solvent and then drying the steel pipe in a drying rack;
step 2: hot galvanizing of the steel pipe: after the steel pipe is dried, the steel pipe is put into a galvanizing bath through a crown block, two transverse plates symmetrical to the two ends of the steel pipe are placed on the two sides of the galvanizing bath before the crown block is placed into the galvanizing bath, the height of the two transverse plates needs to be one higher and one lower, then one end of the steel pipe is placed into the galvanizing bath through the crown block, the steel pipe is in an inclined state, after one end of the steel pipe is contacted with the transverse plates in the galvanizing bath, the other end of the steel pipe is put down through the crown block, the other end of the steel pipe is contacted with the other transverse plate, after the steel pipe is placed stably, the crown block continues to put down the suspension wire, the downward distance of the suspension wire is 0.4-0.6 cm, the suspension wire contacted with the surface of the steel pipe is separated from the steel pipe, the surface of the steel pipe is completely contacted with galvanizing liquid, after the galvanizing time is up, the suspension wire is lifted through the crown block, the suspension wire is contacted with the steel pipe again, in the lifting process of the steel pipe is lifted up and then is put into one end of the galvanizing bath, then lifting one end of the steel pipe into a galvanizing bath, enabling the steel pipe to be in an inclined state when lifted, draining zinc plating liquid inside and on the surface of the steel pipe after the steel pipe is completely lifted, leveling the steel pipe through a crown block, enabling the two ends of the steel pipe to be in a horizontal line, and if the length of the steel pipe changes, changing the positions of the two transverse plates along with the two ends of the steel pipe;
and step 3: cooling the steel pipe: placing the galvanized steel pipe into a cooling tank for cooling, wherein the water temperature of the cooling tank is not more than 60 ℃;
and 4, step 4: passivating the steel pipe: after the steel pipe is cooled, spraying a passivation solution to the steel pipe by using a spray head, after the steel pipe is passivated, air-drying the steel pipe, wherein air-drying is carried out by blowing air, the surface of the steel pipe must be completely air-dried, and a little passivation solution cannot be remained;
and 5: and (3) steel tube packaging: and finally, inspecting the galvanized steel pipe, and packaging and leaving the factory after the quality of the steel pipe is ensured.
2. A hot dip galvanizing process for steel pipes according to claim 1, characterized in that: in the step 1, the steel pipe is a steel pipe flange or a steel pipe insert plate component.
3. A hot dip galvanizing process for steel pipes according to claim 1, characterized in that: in the step 1, when the length of the steel pipe flange component is less than or equal to 4m, one suspension wire is fixed at the position of 1-1.5m of the left end of the steel pipe, the other suspension wire is fixed at the position of 0.7-1.2m of the right end of the steel pipe, when the length of the steel pipe flange component is more than 4 and is less than or equal to 8m, one suspension wire is fixed at the position of 1.5-2.0m of the left end of the steel pipe, and the other suspension wire is fixed at the position of 1.0-1.5m of the right end of the steel pipe.
4. A hot dip galvanizing process for steel pipes according to claim 1, characterized in that: in the step 1, when the length of the steel pipe inserting plate is less than or equal to 7m, one suspension wire is fixed at the position of 1.5-2.0m of the left end of the steel pipe, the other suspension wire is fixed at the position of 1.0-1.5m of the right end of the steel pipe, the length of the steel pipe inserting plate is more than 7m and is less than or equal to 9m, one suspension wire is fixed at the position of 2.5-3.0m of the left end of the steel pipe, the other suspension wire is fixed at the position of 2.0-2.5m of the right end of the steel pipe, when the length of the steel pipe inserting plate is more than 9m and is less than or equal to 13.1m, one suspension wire is fixed at the position of 3.0m-3.5m of the left end of the steel pipe, and the other suspension wire is fixed at the position of 2.8-3.2m of the right end of the steel pipe.
5. A hot dip galvanizing process for steel pipes according to claim 1, characterized in that: in the step 1, if a plurality of steel pipes are hoisted synchronously, a certain gap is ensured to be kept between the steel pipes, so that the steel pipes are prevented from being attached and overlapped, before the steel pipes are hoisted, the weight of the steel pipes is strictly controlled, and the hoisting weight of the steel pipes each time does not exceed the load.
6. A hot dip galvanizing process for steel pipes according to claim 1, characterized in that: in the step 2, the temperature of the zinc liquid is controlled between 440 and 460 ℃, the zinc dipping time is controlled between 30 and 60 seconds, when adding zinc into the zinc pot, the zinc ingot is preheated, one bundle of zinc is not allowed to be added when adding zinc, the zinc is added at most five blocks, the wall of the zinc pot of the zinc ingot is slowly stuck to the surface longitudinally during adding zinc, so as to avoid damaging the zinc pot by impact and splashing a large amount of zinc to hurt people, and the iron substances in the zinc liquid are strictly prohibited from falling in, so as to prevent a large amount of zinc slag from being generated.
7. A hot dip galvanizing process for steel pipes according to claim 1, characterized in that: in the step 2, when the steel pipe is hoisted, the slag removing tool needs to be manually used for removing the floating zinc slag on the top of the zinc-plating bath, and in the zinc slag removing process, the slag removing tool needs to be slowly put into the zinc-plating bath after the zinc liquid splashes.
8. A hot dip galvanizing process for steel pipes according to claim 1, characterized in that: in the step 3, after the steel pipe is cooled, the direct contact of the surface of the steel pipe or cooling water in a cooling pool by hands is forbidden.
9. A hot dip galvanizing process for steel pipes according to claim 1, characterized in that: in the step 4, after the steel pipe is air-dried, careful inspection is carried out to determine whether the passivation solution remains on the surface of the steel pipe, and if the passivation solution is found to be timely treated, the passivation solution is directly wiped by hands.
10. A hot dip galvanizing process for steel pipes according to claim 1, characterized in that: in the step 5, once the outer surface of the steel pipe after the steel pipe is packaged is polluted, the steel pipe can be stacked after being smeared by clean cotton sand, if the pipe is in a small pipe condition, the water in the pipe needs to be controlled completely, no person is allowed to step on the pipe by feet, and the appearance quality of the galvanized pipe needs to be maintained.
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| CN202110909478.6A CN113604767A (en) | 2021-08-09 | 2021-08-09 | Hot galvanizing process method for steel pipe |
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| CN202110909478.6A CN113604767A (en) | 2021-08-09 | 2021-08-09 | Hot galvanizing process method for steel pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114990461A (en) * | 2022-05-09 | 2022-09-02 | 李延召 | Steel material galvanizing equipment for building |
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