CN108825886A - A kind of one-shot forming technique of inside and outside double corrosion-proof plastic-coated multiple tubes - Google Patents
A kind of one-shot forming technique of inside and outside double corrosion-proof plastic-coated multiple tubes Download PDFInfo
- Publication number
- CN108825886A CN108825886A CN201810735297.4A CN201810735297A CN108825886A CN 108825886 A CN108825886 A CN 108825886A CN 201810735297 A CN201810735297 A CN 201810735297A CN 108825886 A CN108825886 A CN 108825886A
- Authority
- CN
- China
- Prior art keywords
- coating
- coated
- plastic
- multiple tubes
- shot forming
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
- C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D123/04—Homopolymers or copolymers of ethene
- C09D123/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/10—Coatings characterised by the materials used by rubber or plastics
- F16L58/1009—Coatings characterised by the materials used by rubber or plastics the coating being placed inside the pipe
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/10—Coatings characterised by the materials used by rubber or plastics
- F16L58/1054—Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/10—Metallic substrate based on Fe
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2254/00—Tubes
- B05D2254/04—Applying the material on the interior of the tube
- B05D2254/06—Applying the material on the interior and exterior of the tube
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2504/00—Epoxy polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2507/00—Polyolefins
- B05D2507/01—Polyethylene
Abstract
The invention discloses the one-shot forming techniques of corrosion-proof plastic-coated multiple tubes double inside and outside one kind, belong to dual corrosion-proof plastic-coated multiple tube technical field.The one-shot forming technique of the plastic-coated composite pipe is：By adjusting polyethylene coating powder coating formulation, make its preheating temperature to 350-400 DEG C, coating finishes before steel tube surface temperature drops to 260 DEG C；When temperature of steel pipe is down to 220-260 DEG C, in outer external coating epoxy powder coating, inside and outside double corrosion-proof plastic-coated multiple tubes are obtained after solidification.The present invention realizes one-pass molding flange connection lined with polyethylene, the outer double anti-corrosion type plastic-coated composite pipes for applying epoxy powder, because epoxy powder coating is anticorrosion coat, not only it had solved the drawbacks of pipeline external surface brushing paint long construction period, but also has solved brushing paint by season, humidity, the defect of temperature limiting.
Description
Technical field
The present invention relates to plastic-coated composite pipe technical fields, and in particular to inside and outside one kind double corrosion-proof plastic-coated multiple tubes it is primary at
Type technique.
Background technique
Double anti-corrosion pipelines and pipe fitting are widely used in electric power, chemical industry, sea water desalination, sewage treatment, pharmacy, harbour and civilian
Etc. water treatment fields.Current anti-corrosion pipeline and pipe fitting employed both at home and abroad, it is mainly interior to apply polyethylene (PE coating) or interior painting
The plastic-coated composite pipe of epoxy powder (EP coating), outer surface of steel tube use the processing form of priming paint, intermediate coat and finishing coat.
Plastic-coated steel coating EP thickness is generally 0.3mm~0.5mm, and coating PE thickness is about 1mm-3mm, coating PE thickness
It is larger.For plastic-coated steel coating EP operating temperature between -20~120 DEG C, coating PE is suitable for -20~60 DEG C of working environment.
Plastic Steel Pipe coating material EP and PE have good corrosion resistance and weather resistance.The trandfer fluid of plastic-coated composite pipe material
(medium) only with coating layer touch, and metallic object is fully effective is isolated, and has a good anti-corrosion effects, resistance to cathodic disbonding, acidproof,
Alkali, salt corrosive nature are splendid；In the case where use environment more severe (such as hydrochlorate alkalinity or desert Environment), also can normally it make
With can effectively extend pipeline service life.Plastic coated composite steel pipe inner wall smooth, coefficient of friction are small, flow velocity is fast, not water accumulation
Dirt, fluid resistance are small.
And the thickness of dry film of plastic-coated steel outer surface paint (anti-decaying paint) is required between 270~300 microns, in
For state the north and coastal area, need to grow very much due to being influenced film thickness by region and environment (low temperature and air humidity are big)
The construction of phase (about 10 days) can be only achieved the thickness of technical requirements, all produce very big influence to construction period and place in this way,
The delivery cycle of every batch of product can all extend 10 days or so, can not stack before pipeline mopping is not dry, floor space is very big.
Existing proposed adoption liner PE coating, the outer mode for applying EP improve above situation.The proportion at existing PE leaching molding powder end is general
For (wt.%)：PE resin 80%, polypropylene 8%, EVA3%, polybutene 3%, cellulose acetate 3%, terpene resin 3%.Separately
Outside, in order to improve some other performance of film, some auxiliary agents, such as antistatic agent are commonly incorporated into.Polyvinyl resin is in not equality of temperature
There are three types of states, i.e. glassy state, elastomeric state, viscous state for degree.In lower temperature environments, high polymer is in rigid solid state, outside
The deformation of the lower only very little of power effect, it is similar to glass, so this state is referred to as glassy state.If this environment temperature liter
Up to certain temperature, then its under external force, shape can change significantly, in certain temperature range, metamorphosis
Relatively stable, this state is known as elastomeric state.If temperature continues to increase, deformation quantity is gradually increased with the raising of temperature, directly
To viscous fluid is become, at this moment its shape cannot be restored, this state is viscous state.
In coating filmform, temperature necessarily is greater than viscous state temperature Tm.Therefore existing PE leaching molding powder is in coating filmform, work
Part preheating and film-forming temperature and time will be appropriate, workpiece preheating temperature be generally 300~350 DEG C (guarantee plastic-coated it is not blistering and
Levelling is fast), film forming (plasticizing) temperature is 180~220 DEG C；220 DEG C are cooled to after plasticizing hereinafter, this temperature condition can continue
Painting anticorrosion paint, but the temperature condition has been unable to reach the temperature requirement (220-260 DEG C) of coating EP coating.
Summary of the invention
The shortcoming that EP coating is applied outside liner PE, mesh of the invention can not be once formed on steel pipe for the prior art
Be the one-shot forming technique of double corrosion-proof plastic-coated multiple tubes is provided inside and outside one kind, pass through optimization PE coating composition and coating work
Skill, realize one-pass molding lined with polyethylene, it is outer apply epoxy powder double anti-corrosion type plastic-coated composite pipes, because epoxy coating attach most importance to it is anti-
Rotten coating had not only solved the drawbacks of pipeline external surface brushing paint long construction period, but also solved brushing paint by season, wet
The defect of degree, temperature limiting.
To achieve the above object, the technical solution adopted in the present invention is as follows：
Inside and outside double corrosion-proof plastic-coated multiple tubes include steel pipe base tube, inner lining of steel pipe polyethylene (PE) coating and steel pipe surface
Epoxy resin (EP) coating of face coating；The polyethylene coating thickness 1-3mm, epoxy powder coating thickness 0.3-0.5mm.
Bond strength is greater than 4MPa between the steel pipe base tube and liner, and outer coating adhesive force is 1.
The both ends of the plastic-coated composite pipe are separately connected flange, for the connection between different plastic-coated composite pipes；
The one side (back side) that flange is connected with plastic-coated composite pipe is coated with epoxy resin (EP) coating, between different pipelines
The joint face (flange front) of flange and flange is coated with polyethylene coating.
No. 20 steel or Q235B etc. may be selected in the material of the steel pipe base tube.
The one-shot forming technique of inside and outside double corrosion-proof plastic-coated multiple tubes, includes the following steps：
(1) prepare steel pipe base tube；
(2) steel pipe internal-surface polyethylene coating；
Prepare polyethylene coating coating, comes out of the stove after steel pipe is preheating to 350-400 DEG C in heating furnace, then carry out poly- second
The coating of ene coatings coating, coating finishes before steel tube surface temperature drops to 260 DEG C；
(3) it after temperature of steel pipe is down within 260 DEG C, polishes outer surface of steel tube, will be stained on outer surface of workpiece
Remaining polyethylene coating coating cleared up after, guarantee workpiece surface temperature still between 220-260 DEG C；
(4) outer surface of steel tube roller coating epoxy coating；
In outer surface of workpiece coating epoxy powder coating under conditions of workpiece surface temperature is greater than 220 DEG C, obtained after solidification
Obtain inside and outside double corrosion-proof plastic-coated multiple tubes.
In above-mentioned steps (2), according to parts by weight, the polyethylene coating coating includes following component：
In the polyethylene coating coating, the weight ratio of polypropylene and EVA are (0.8-1)：1.
In the polyethylene coating coating, polypropylene is preferably 5.0-6.0 parts by weight, and EVA is preferably 5.5-6.5 weight
Part.
In the polyethylene coating coating, auxiliary agent, such as antistatic agent can also be added as needed.
It design principle of the present invention and has the beneficial effect that：
1, the structure design of the double anti-corrosion pipelines of the present invention has accurate time and technique requirement to lining technique is rolled in pipeline,
It is required that the temperature that pipeline is come out of the stove from heating furnace is higher than 350 DEG C, before the construction of rolling lining finishes inside, pipe temperature must not be reduced to
260 DEG C hereinafter, otherwise pipeline is handled by calcellation！Then it is lifted into outer lining epoxy rolling lining workbench again, is reduced in pipe temperature
Before 220 DEG C, outer rolling grommet oxygen coating work is carried out, before external coating construction finishes, pipe temperature must not still be lower than 220 DEG C,
Then the lifting pipeline inside and outside double coating constructions finished, into low temperature oven curing molding, is managed to rail set is solidified after coming out of the stove
Road suspension is cooled to room temperature.
2, the coating preheating temperature of existing PE formulation for coating material is 300-350 DEG C, and invention makes to gather by adjusting PE formulation for coating material
Propylene accounts for 5.0-6.5wt.%, and EVA accounts for 5.0-7.0wt.%, so that coating preheating temperature is improved 50 DEG C compared with ordinary temperature and (improves
To 350-400 DEG C), plasticization temperature at 260 DEG C or more so that inner surface of pipeline temperature drop to 260 DEG C or less, 220 DEG C with
It when upper, carried out outer surface roller coating EP coating and is possibly realized, that is, realize and apply PE, the outer one-pass molding for applying EP in steel pipe.
Detailed description of the invention
Fig. 1 is the one-time formed inside and outside double corrosion-proof plastic-coated composite pipe structure schematic diagrames of the present invention.
Fig. 2 is to pass through flanged joint figure between double corrosion-proof plastic-coated multiple tubes inside and outside the present invention.
Fig. 3 is that steelplastic pipe surfaces externally and internally moulds layer；Wherein：(a) outer surface；(b) inner surface.
Wherein：1- plastic-coated composite pipe；101- steel pipe base tube；102- polyethylene coating；103- epoxy coating；2- method
It is blue.
Specific embodiment
For a further understanding of the present invention, below in conjunction with example, present invention is described, but example is only to the present invention
The characteristics of and advantage be further elaborated, rather than limiting to the claimed invention.
The one-time formed inside and outside double corrosion-proof plastic-coated multiple tubes of the present invention, structure such as Fig. 1 show.The plastic-coated composite pipe 1 includes
Epoxy resin (EP) coating 103 of steel pipe base tube 101, inner lining of steel pipe polyethylene (PE) coating 102 and outer surface of steel tube coating.
As shown in Fig. 2, the both ends of the plastic-coated composite pipe are separately connected flange 2, between different plastic-coated composite pipes
Connection；The one side (back side) that flange is connected with plastic-coated composite pipe is coated with epoxy resin (EP) coating 103, between different pipelines
The joint face (flange front) of flange and flange is coated with polyethylene coating 102.
The preferred 1-3mm of polyethylene coating thickness, epoxy coating thickness 0.3-0.5mm.
No. 20 steel or Q235B etc. may be selected in the material of the steel pipe base tube.
Embodiment 1：
The process that the present embodiment one-pass molding prepares inside and outside double corrosion-proof plastic-coated multiple tubes is as follows：
(1) prepare No. 20 steel or Q235B steel pipe, be connected with flange；
(2) steel pipe internal-surface and flange front coating polyethylene coating：
Prepare polyethylene coating coating, coating group becomes (parts by weight)：80 parts of PE resin, 6 parts of polypropylene, EVA is 6 parts,
3 parts of polybutene, 3 parts of cellulose acetate, 3 parts of terpene resin.
Roller coating process is：It comes out of the stove after steel pipe is heated to 380 DEG C in heating furnace, is then dropped in steel tube surface temperature
Coating finishes before 260 DEG C, and the coating under the conditions of the temperature can guarantee not blistering (the polyethylene coating plasticization temperature of plastic-coated powder
Greater than 260 DEG C)；
(3) it after temperature of steel pipe is down within 260 DEG C, polishes outer surface of steel tube, will be stained on outer surface of workpiece
Remaining polyethylene coating coating cleared up after, guarantee workpiece surface temperature still between 220-260 DEG C；
(4) outer surface of steel tube and flange back side roller coating epoxy coating；
In outer surface of workpiece coating epoxy coating under conditions of workpiece surface temperature is greater than 220 DEG C, obtained after solidification
Obtain inside and outside double corrosion-proof plastic-coated multiple tubes.
Testing result is as follows：
1, plastic-coated composite pipe lined with polyethylene (PE) coating 2.5mm that the present embodiment obtains, outer surface coat epoxy resin
Coating 0.40mm.
2, appearance and surface quality：Reference standard：GB/T28897-2012 steel-plastics composite pipe；Test result：Steel on inspection
It is smooth to mould pipe inner and outer surfaces modeling layer, bubble-free, crackle, decortication, scratch, recess, uniform color (Fig. 3).
3, inside and outside lining plastic bond strength：
Reference standard：GB/T28897-2012 steel-plastics composite pipe；
Outer lining plastic test result：Coating cannot be significantly stripped, and grade is judged to 1 grade.
Lining plastic test result：Base tube mean inside diameter 158mm, length 20mm, bond strength 4.43MPa (standard requirements base
Bond strength is not less than 1.5MPa between pipe and liner).
4, lining plastic layer adhesive force：
Test equipment：Push-pull effort machine；
Reference standard：GB/T28897-2012 steel-plastics composite pipe；
Test process：100mm long pipeline section is taken, is cut with cutter along tube axial direction on interior surface plastic coating layer with 10mm width
Twice are deep to the crack on base tube surface, uncover one end, do not damage coating layer, clamp coating layer, overturning 180 with the fixture of dynamometer
Degree gradually firmly peels, power when observing peeling-off, and being greater than 30N is qualification.
Test result：Adhesive force average value is 101.9N.
4, cooling thermal impact cyclic test：
Test equipment：Climatic chamber, high-low temperature test chamber, microcomputer controlled electronic universal testing machine；
Reference standard：GB/T28897-2012 steel-plastics composite pipe；
Test process：Test specimen is dipped in 30min in 95 degree of hot water, takes out and cools down 10min at normal temperature, then be dipped in 5 degree
10min is shelved in 30min in cold water, taking-up at normal temperature, and the above are a cycles, do 3 periods altogether, sample does adhesive force later
(outer layer) test or bond strength (internal layer) test.
Test request：Outer layer：Do not allow to mould layer deformation and crackle, coating adhesion should be 1-3 grades；Internal layer：Do not allow to mould
Layer deformation and crackle, bond strength should be not less than 1.5MPa.
Test result：After outer test, sample flawless, the lamination being visible by naked eyes between steel and outer plastic layer；It applies
Layer cannot be significantly stripped, and grade is judged to 1 grade.After internal layer test, sample flawless is visible by naked eyes between steel and inner plastic layer
Lamination；Maximum loading 40717N, bond strength 4.10MPa.
5, coating layer impact test：
Test equipment：Dropping shock testing machine；
Reference standard：GB/T28897-2012 steel-plastics composite pipe；
Test condition：Hammer weight 6.3Kg, height of fall 1000mm into shape.
Test result：After test, coating is without peeling, phenomenon of rupture.
6, bend test：
Reference standard：GB/T28897-2012 steel-plastics composite pipe；
Test condition：It is with bending machine that sample is curved to 90 °, sample is cut at bending deformation and is observed, it is desirable that inside and outside modeling
Layer cannot be separated with substrate.
Test result：After test, outer plastic layer and steel pipe flawless, no lamination；Liner is not separated with steel pipe substrate.
Comparative example 1：
The process that this example prepares inside and outside double corrosion-proof plastic-coated multiple tubes is as follows：
(1) prepare No. 20 steel or Q235B steel pipe, be connected with flange；
(2) steel pipe internal-surface and flange front coating polyethylene coating：
Prepare polyethylene coating coating, coating group becomes (parts by weight)：80 parts of PE resin, 8 parts of polypropylene, EVA is 3 parts,
3 parts of polybutene, 3 parts of cellulose acetate, 3 parts of terpene resin.
Roller coating process is：It comes out of the stove after steel pipe is heated to 320 DEG C in heating furnace, then in steel tube surface roller coating polyethylene
Coating, about 180-220 DEG C of plasticization temperature；Pipe surface temperature drops to 220 DEG C hereinafter, EP coating can not be applied again after plasticizing.It is such as right
Steel pipe heats again, makes up to the roller coating temperature (220 DEG C or more) of epoxy coating, then the polyethylene that can destroy coating applies
Layer.Coating under the conditions of the temperature can guarantee that plastic-coated powder is not blistering (polyethylene coating plasticization temperature is greater than 260 DEG C).
Comparative example 2：
With comparative example 1 the difference is that：
It comes out of the stove after steel pipe is heated to 360 DEG C in heating furnace during roller coating, then in steel tube surface roller coating polyethylene
Coating.Because heating temperature is excessively high, powder blisters when coating polyethylene coating, coating failure.
Claims (8)
1. the one-shot forming technique of double corrosion-proof plastic-coated multiple tubes inside and outside one kind, it is characterised in that：The plastic-coated composite pipe includes steel pipe
The epoxy powder coating of base tube, inner lining of steel pipe polyethylene coating and outer surface of steel tube coating；The polyethylene coating thickness 1-
3mm, epoxy coating thickness 0.3-0.5mm；The one-shot forming technique of the plastic-coated composite pipe includes the following steps：
(1) prepare steel pipe base tube；
(2) steel pipe internal-surface polyethylene coating；
Prepare polyethylene powder coating, comes out of the stove after steel pipe is preheating to 350-400 DEG C in heating furnace, then carry out polyethylene powder
The coating of last coating, coating finishes before steel tube surface temperature drops to 260 DEG C；
(3) it after temperature of steel pipe is down within 260 DEG C, polishes outer surface of steel tube, it is surplus on outer surface of workpiece by being stained with
After remaining polyethylene powder coating is cleared up, guarantee workpiece surface temperature still between 220-260 DEG C；
(4) outer surface of steel tube sprays epoxy powder coating；
In outer surface of workpiece coating epoxy powder coating under conditions of workpiece surface temperature is greater than 220 DEG C, institute is obtained after solidification
State inside and outside double corrosion-proof plastic-coated multiple tubes.
2. the one-shot forming technique of inside and outside double corrosion-proof plastic-coated multiple tubes according to claim 1, it is characterised in that：The steel
Bond strength is greater than 4MPa between pipe base tube and liner, and outer coating adhesive force is 1 grade.
3. the one-shot forming technique of inside and outside double corrosion-proof plastic-coated multiple tubes according to claim 1, it is characterised in that：The painting
The both ends of plastic composite are separately connected flange, for the connection between different plastic-coated composite pipes.
4. the one-shot forming technique of inside and outside double corrosion-proof plastic-coated multiple tubes according to claim 3, it is characterised in that：The method
What orchid was connected with plastic-coated composite pipe is coated with epoxy powder coating on one side, the company of flange and flange between different plastic-coated composite pipes
Junction is coated with polyethylene coating.
5. the one-shot forming technique of inside and outside double corrosion-proof plastic-coated multiple tubes according to claim 1, it is characterised in that：The steel
The material of pipe base tube selects No. 20 steel or Q235B.
6. the one-shot forming technique of inside and outside double corrosion-proof plastic-coated multiple tubes according to claim 1, it is characterised in that：Step
(2) in, according to parts by weight, the polyethylene powder coating includes following component：
7. the one-shot forming technique of inside and outside double corrosion-proof plastic-coated multiple tubes according to claim 6, it is characterised in that：It is described poly-
In ethylene powder coating, the weight ratio of polypropylene and EVA are (0.8-1)：1.
8. the one-shot forming technique of inside and outside double corrosion-proof plastic-coated multiple tubes according to claim 6, it is characterised in that：It is described poly-
In ethylene powder coating, polypropylene is preferably 5.0-6.0 parts by weight, and EVA is preferably 5.5-6.5 parts by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810735297.4A CN108825886B (en) | 2018-07-06 | 2018-07-06 | One-step forming process of internal and external double-corrosion-resistant plastic-coated composite pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810735297.4A CN108825886B (en) | 2018-07-06 | 2018-07-06 | One-step forming process of internal and external double-corrosion-resistant plastic-coated composite pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108825886A true CN108825886A (en) | 2018-11-16 |
| CN108825886B CN108825886B (en) | 2020-02-14 |
Family
ID=64136173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810735297.4A Active CN108825886B (en) | 2018-07-06 | 2018-07-06 | One-step forming process of internal and external double-corrosion-resistant plastic-coated composite pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108825886B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113956698A (en) * | 2021-09-18 | 2022-01-21 | 安徽华辉塑业科技股份有限公司 | Pipeline anticorrosion powder coating |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108692134B (en) * | 2018-07-06 | 2023-09-26 | 辽宁凌勃防腐工程科技有限公司 | Internal and external double-corrosion-resistant plastic-coated composite pipe and one-step forming process thereof |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002327867A (en) * | 2001-02-28 | 2002-11-15 | Nkk Corp | Internal surface resin lining steel pipe and manufacturing method |
| GR1005582B (en) * | 2005-08-11 | 2007-07-16 | Composite seamless, circular tube made of copper with a mixture of a plastic lining (pe-hd-md-ld-lld, pe-xa,b,c, pe-rt, pp-rc, polyolefin-based lsf, pet, eva, pvc or pe) the components of which are strongly bonded together by an adhesive mixture suitable for sanitary installations, heating/air-conditioning installations and gas (refrigerant, fuel and natural gas) installations and production method | |
| CN201066001Y (en) * | 2007-07-23 | 2008-05-28 | 潍坊市长胜管业有限公司 | Liner and outer-coated steel-plastic composite pipe |
| CN101782166A (en) * | 2010-03-09 | 2010-07-21 | 广东联塑科技实业有限公司 | Plastic coated composite steel pipe |
| CN203258214U (en) * | 2013-05-20 | 2013-10-30 | 河北省普蓝科工业科技有限公司 | Steel-plastic composite pipe |
| CN103736635A (en) * | 2013-12-19 | 2014-04-23 | 河北世纪金属结构有限公司 | Bellows hot plastic coating processing technology |
| CN104500865A (en) * | 2014-12-23 | 2015-04-08 | 浙江铭仕不锈钢有限公司 | Outer weld stainless steel plastic composite pipe |
| CN105443879A (en) * | 2014-09-28 | 2016-03-30 | 董瑾 | Composite pipe used for city heat-supply engineering and processing technology thereof |
| CN105927802A (en) * | 2016-06-24 | 2016-09-07 | 广州市华粤管业有限公司 | Inside-outside plastic-coated steel pipe and manufacturing process thereof |
| CN206280617U (en) * | 2016-12-20 | 2017-06-27 | 河北省普蓝科工业科技有限公司 | Heating in medium frequency anticorrosion plastic coated composite steel pipe |
| CN107255206A (en) * | 2017-06-23 | 2017-10-17 | 辽宁乾丰钢塑管制造有限公司 | Composite tubular assembly conveyed for seawater and preparation method thereof |
| CN108692134A (en) * | 2018-07-06 | 2018-10-23 | 何敏 | Double corrosion-proof plastic-coated multiple tubes and its one-shot forming technique inside and outside one kind |
-
2018
- 2018-07-06 CN CN201810735297.4A patent/CN108825886B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002327867A (en) * | 2001-02-28 | 2002-11-15 | Nkk Corp | Internal surface resin lining steel pipe and manufacturing method |
| GR1005582B (en) * | 2005-08-11 | 2007-07-16 | Composite seamless, circular tube made of copper with a mixture of a plastic lining (pe-hd-md-ld-lld, pe-xa,b,c, pe-rt, pp-rc, polyolefin-based lsf, pet, eva, pvc or pe) the components of which are strongly bonded together by an adhesive mixture suitable for sanitary installations, heating/air-conditioning installations and gas (refrigerant, fuel and natural gas) installations and production method | |
| CN201066001Y (en) * | 2007-07-23 | 2008-05-28 | 潍坊市长胜管业有限公司 | Liner and outer-coated steel-plastic composite pipe |
| CN101782166A (en) * | 2010-03-09 | 2010-07-21 | 广东联塑科技实业有限公司 | Plastic coated composite steel pipe |
| CN203258214U (en) * | 2013-05-20 | 2013-10-30 | 河北省普蓝科工业科技有限公司 | Steel-plastic composite pipe |
| CN103736635A (en) * | 2013-12-19 | 2014-04-23 | 河北世纪金属结构有限公司 | Bellows hot plastic coating processing technology |
| CN105443879A (en) * | 2014-09-28 | 2016-03-30 | 董瑾 | Composite pipe used for city heat-supply engineering and processing technology thereof |
| CN104500865A (en) * | 2014-12-23 | 2015-04-08 | 浙江铭仕不锈钢有限公司 | Outer weld stainless steel plastic composite pipe |
| CN105927802A (en) * | 2016-06-24 | 2016-09-07 | 广州市华粤管业有限公司 | Inside-outside plastic-coated steel pipe and manufacturing process thereof |
| CN206280617U (en) * | 2016-12-20 | 2017-06-27 | 河北省普蓝科工业科技有限公司 | Heating in medium frequency anticorrosion plastic coated composite steel pipe |
| CN107255206A (en) * | 2017-06-23 | 2017-10-17 | 辽宁乾丰钢塑管制造有限公司 | Composite tubular assembly conveyed for seawater and preparation method thereof |
| CN108692134A (en) * | 2018-07-06 | 2018-10-23 | 何敏 | Double corrosion-proof plastic-coated multiple tubes and its one-shot forming technique inside and outside one kind |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113956698A (en) * | 2021-09-18 | 2022-01-21 | 安徽华辉塑业科技股份有限公司 | Pipeline anticorrosion powder coating |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108825886B (en) | 2020-02-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102107176B (en) | Coating process for pipeline three-layer structural anticorrosive coating | |
| CN104877484B (en) | Petrochemical industry oil tank aqueous energy-saving heat-insulating thermal insulation coatings and preparation method thereof | |
| CN104403497B (en) | A kind of hydrophilic coated aluminum foil and its manufacture method | |
| CN108825886A (en) | A kind of one-shot forming technique of inside and outside double corrosion-proof plastic-coated multiple tubes | |
| CN104653947A (en) | Preparation method for steel pipe fitting with anticorrosive layer | |
| CN109210282A (en) | A kind of heavy caliber anti-corrosive steel tube and manufacture craft | |
| CN108692134A (en) | Double corrosion-proof plastic-coated multiple tubes and its one-shot forming technique inside and outside one kind | |
| CN101158436A (en) | Nylon coating flange manufacturing method | |
| CN101865350B (en) | Manufacturing method of steel rotational moulding pipeline with polyolefin lining layer | |
| CN201096234Y (en) | Plastic pipe with oxygen barrier layer | |
| EP0145580A1 (en) | Primer coating composition | |
| CN209164783U (en) | A kind of heavy caliber anti-corrosive steel tube | |
| CN101526164B (en) | Multilayer heat insulation pipe and manufacturing method thereof | |
| CN202054780U (en) | Viscoelastic-body antiseptic adhesive tape | |
| CN211570513U (en) | Protective film for replacing high-temperature baking type fluorocarbon paint and metal plate containing same | |
| JPH0211424B2 (en) | ||
| JP2012206318A (en) | Coated metal body, and method for manufacturing the same | |
| JP3168904B2 (en) | Exterior polyethylene coated steel pipe | |
| JPH10264308A (en) | Polyolefin-coated steel pipe and its manufacture | |
| CN105038352A (en) | Energy-saving environment-friendly coating adopting modified acrylic resin and used for knurled decoration plate | |
| CN110815767A (en) | Manufacturing method of heat-resistant polyethylene composite pipe | |
| JP5463999B2 (en) | Manufacturing method of inner surface coated steel pipe for water piping | |
| CN108250848A (en) | A kind of pipeline impregnation | |
| JP4617575B2 (en) | Method for producing anti-corrosion coated steel | |
| JP3168871B2 (en) | Polyolefin coated steel pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190328 Address after: 110500 Chaoyangbao Village, Shenyang Shengli Economic Development Zone, Shenyang City, Liaoning Province Applicant after: Liaoning Bo Bo anti-corrosion Engineering Technology Co., Ltd. Address before: 110500 No. 1 Zheng'an Qianlu, Shenyang Kangping Shengli Economic Development Zone, Liaoning Province Applicant before: He Min |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |