CN105149865A - Process for preventing corrosion of plastic lining on inner wall of large-diameter tank equipment - Google Patents
Process for preventing corrosion of plastic lining on inner wall of large-diameter tank equipment Download PDFInfo
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- CN105149865A CN105149865A CN201510599791.9A CN201510599791A CN105149865A CN 105149865 A CN105149865 A CN 105149865A CN 201510599791 A CN201510599791 A CN 201510599791A CN 105149865 A CN105149865 A CN 105149865A
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- sheet material
- lining
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P13/00—Making metal objects by operations essentially involving machining but not covered by a single other subclass
- B23P13/02—Making metal objects by operations essentially involving machining but not covered by a single other subclass in which only the machining operations are important
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/02—Wall construction
- B65D90/06—Coverings, e.g. for insulating purposes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Revetment (AREA)
Abstract
The invention relates to a process for preventing corrosion of a plastic lining and in particular relates to a process for preventing corrosion of a plastic lining on the inner wall of large-diameter tank equipment. The process comprises the following steps: cutting prewelded plates of the tank equipment and pretreating the prewelded plates; welding a reinforcing net on each prewelded plate; cleaning rust on the prewelded plates with welded reinforcing nets; carrying out PO (propylene oxide) lining manufacturing on the prewelded plates and reserving 10-20cm holes which do not undergo lining manufacturing in the surrounding edges of each prewelded plate; rolling the prewelded plates and welding the prewelded plates to form the tank equipment; after welding, carrying out PO lining repair on weld joints reserved between the adjacent prewelded plates. The process has the advantages that the problem of corrosion prevention of the plastic lining of the large-diameter tank (phi is not less than 5000mm) with stronger solution corrosivity is solved; the prepared large-diameter tank has high strength and high corrosion resistance; the diameter and height of the construction tank can be 20-30m, thus filling in the gap in the plastic linings of ultra-large tanks in the industry.
Description
Technical field
The present invention relates to a kind of lining and mould anticorrosion process, the interior wall liner being specifically related to a kind of major diameter tank body equipment moulds anticorrosion process.
Background technology
Traditional storage tank equipment plastic coating process adopts the rotational molding technique identical with pipeline, namely utilizes professional anti-corrosive tools equipment (as large-scale turning rolls, wobbler etc.) to carry out rolling lining system, by Integratively formed for anti-corrosion material in steel body surface after equipment heating.The advantage of this technique is apparent, i.e. one-shot forming, and repair without the need to secondary except flange port, serving as a contrast thickness processed can constantly thicken as requested, and because rolling always, avoids anti-corrosion material in sulfidation, produce sagging phenomenon.But storage in-can preservation rotational molding technique also has its limitation, namely tank body must be dismantled in advance, if tank body installation in position just cannot complete lining system, and to limit by transport, space and volume, large tank carry out rolling, overturn and secondary installing cannot realize.In general, adopt the storage tank maximum gauge of rotational molding technique lining system below 7 meters, if diameter is large again, need to consider other material.
At present, in tank body equipment, anticorrosion general employing is interior painting fiberglass, interior stickup rubber, interior stickup PP plate, interior stickup tetrafluoro plate, interior roller coating PO powder.But for major diameter tank body equipment (Φ >=5000mm): 1. because equipment is too large, existing roller coating PO technique cannot realize; 2. due to PP or tetrafluoro the coefficient of expansion all with carbon steel difference too large (coefficient of expansion of bi-material is all about about 10 times of carbon steel), cause laminating in the middle of major diameter equipment liner makes insecure, easily produce shelling and Seepage; 3. in, be coated with fiberglass and interior stickup rubber process feasible, but can not be durable for the solution that a lot of corrosivity is stronger.
Summary of the invention
In order to overcome the stronger deficiency that the laminating of major diameter tank body equipment inner liner is insecure and tolerance is on the weak side of solution corrosion, the interior wall liner that the invention provides a kind of major diameter tank body equipment moulds anticorrosion process, solve the lining plastic Anticorrosion of the stronger major diameter tank body of solution corrosion, there is high strength and high-corrosion resistance.
The interior wall liner of major diameter tank body equipment of the present invention moulds anticorrosion process, comprises the following steps:
(1) the pre-welding sheet material of tank body equipment is carried out sanction to cut, and pretreatment;
(2) reinforcement of weld net on every block pre-welding sheet material;
(3) the pre-welding sheet material that butt welding connects reinforcing network carries out rust cleaning cleaning;
(4) process to step (3) the pre-welding sheet material obtained and carry out PO lining technique processed, the edge of the surrounding of every block pre-welding sheet material reserves 10-20cm hole and will not serve as a contrast system;
(5) the pre-welding sheet material that step (4) obtains is rolled and is welded into tank body equipment; After welding is good, the reserved place in the welded seam place between adjacent pre-welding sheet material and step (3) is carried out the repair of PO liner.
Wherein:
Pre-welding sheet material in step (1) is the sheet material for being welded into storage tank tank body.
Cut out the pre-welding panel length after cutting in step (1) and be no more than 6 meters, width is no more than 2 meters.Processing process is carried out respectively to cutting out the pre-welding sheet material cut.
Pretreatment described in step (1) is: cleaned by pre-welding sheet material, removes the oil of original attachment, dirt and attachment, and dry; Then pre-welding sheet material is polished, by the corner angle of pre-welding sheet material and sanding burr to level and smooth.
Reinforcing network is expanded metal lath, to increase the degree of adhesion of PO powder and reservoir walls in lining technique processed; Reinforcing network is expanded metal lath, and expanded metal lath wall thickness is preferably 2-3mm.
The surface roughness credit rating of the pre-welding sheet material of the good reinforcing network of welding in step (3) after rust cleaning cleaning is according to GB8923-88 " before application steel surface rusting grade and derusting grade ", and derusting grade is Sa2.5 level, roughness >=Ry70 μm.
The foreign matter of rust cleaning cleaning for utilizing ball blast sandblasting to remove surface in step (3), employing compressed air is power, material spray is ejected into form spray beam the pre-welding plate surface having welded reinforcing network with the speed of 350-450m/s, makes surface obtain certain cleannes and roughness.The mechanical performance of the pre-welding sheet material of the good reinforcing network of welding is improved, therefore improves the pre-welding sheet material fatigue resistance of having welded reinforcing network, add the adhesive force between itself and coating, extend the durability of film, be also conducive to the levelling of coating.
Compressed air used is at 0.4-0.8Mpa, jet length is 100-300mm, sprays for air compressor produces compressed air, blows the quartz sand in sand tank, sprayed by connecting line and rifle head, the angle of injection direction and reservoir walls surface normal is 15-30 °; Nozzle selects venturi nozzle, and quartz sand selected by abrasive material, and abrasive material is placed in sand tank, and the granularity 0.5-1.5mm of abrasive material, moisture content is less than 1%.
In step (4), PO lining technique processed is: carry out homogeneous heating to 320-380 DEG C to pre-welding plate surface, heating equipment used is that lining is moulded electric furnace, heated special firelock or the volley of rifle fire etc., detect in real time with temperature measurer and treat lining steel body, guarantee that steel temperature meets lining and moulds requirement, to reach best lining effect, if the too high meeting of temperature makes lining prepared material over cure and occurs sagging phenomenon, if temperature is too low, the sulfuration of lining prepared material can be made incomplete.When serving as a contrast processed, relative humidity is not more than 80%.With material loading instrument, PO powder is coated in pre-welding plate surface.
In step (4), after lining system, the thickness of PO powder is 4-5mm.
In step (4), the edge of the surrounding of every block pre-welding sheet material reserves 10-20cm hole and will not serve as a contrast system; After every block pre-welding sheet material all completes lining technique processed; assembly welding is carried out to pre-welding sheet material; the space reserved damages for avoiding serving as a contrast preparative layer to PO during assembly welding; when welding, side weld edge fit cold water butt welded seam place carries out cooling processing simultaneously; reduce the temperature of pre-welding sheet material to greatest extent, thus maximum protection is carried out to completed PO lining preparative layer.
Be tank body by pre-welding sheet material integral solder, PO serves as a contrast the inner surface of preparative layer at tank body, the reserved place of tank inner surface pre-welding sheet material is cleared up and cleaning, adopt outside heating method to carry out PO lining system to reserved place, make this place serve as a contrast prepared material complete cure and bond with lining prepared material moieties into close before.Outside heating method is be heated to 320-380 DEG C at storage tank external spray firelock by needing the place of lining system, and in storage tank, PO powder is coated in reservoir walls by personnel, completes this section of PO lining system.
Carry out conventional PO lining system to interface tube and manhole position, turn up and be not less than minimum widith standard all over lining width processed in flange port place, lining system needs smooth round and smooth, and flange serves as a contrast preparative layer thickness must not serve as a contrast 80 percent of preparative layer minimum thickness lower than other.
Equipment after lining system and mouth of pipe flatness are checked, flatness is not reached to the pipe fitting of requirement, adopt special-purpose polishing equipment to polish, guarantee that flange port junction can compact siro spinning technology.
Last electricity consumption Spark plug optical fiber sensor instrument carries out all standing to reservoir walls and detects without dead angle, if there is indivedual leak source, repairs, until finally complete with flame spraying gun.
In sum, the present invention has the following advantages:
(1) the interior wall liner that the invention provides a kind of major diameter tank body equipment moulds anticorrosion process, solve the lining plastic Anticorrosion of the stronger major diameter tank body (Φ >=5000mm) of solution corrosion, the major diameter tank body prepared has high strength and high-corrosion resistance; The diameter serving as a contrast tank body processed can reach twenty or thirty rice, and height can reach twenty or thirty rice, solves the blank in ultra-large type tank body lining plastic in industry.
(2) what the present invention prepared is a kind of steel-plastic composite storage tank, by steel, net, moulds and is compounded to form an entirety, get steel, mould the new material of two kinds of different materials advantages, have the high strength of steel body and the high-corrosion resistance of plastics.
(3) the present invention's lining is adopted to mould the large-scale storage tank inner wall surface that anticorrosion process process obtains smooth, homogeneous, flawless, bubble, layering and affect other defects of properties of product.
(4) nondestructive high-frequency spark detector is adopted to detect the reservoir walls that process of the present invention obtains, setting voltage 15000V, by test bar perpendicular to lining face with the evenly movement of the speed lower than 50mm/s, there will not be and puncture or dew point phenomenon.
(5) with 1.25 times of pressure, the water pressure test is carried out to storage tank, and keep 0.5 hour; Storage tank is filled water, static placement 48 hours; All without drainage.
(6) carry out integrity test to the storage tank that process of the present invention obtains, adopt spark test, voltage >=15KV during experiment, pop one's head at backing layer surface slowly continuous moving, speed is no more than 100mm/s, and storage tank stands intact.
Detailed description of the invention
Below in conjunction with embodiment, the present invention will be further described.
Embodiment 1
The interior wall liner of major diameter tank body equipment of the present invention moulds anticorrosion process, comprises the following steps:
(1) the pre-welding sheet material of tank body equipment is carried out sanction to cut, the pre-welding panel length cut out after cutting is no more than 6 meters, and width is no more than 2 meters, is cleaned by pre-welding sheet material, removes the oil of original attachment, dirt and attachment, and dry; Then pre-welding sheet material is polished, by the corner angle of pre-welding sheet material and sanding burr to level and smooth.
(2) reinforcement of weld net on every block pre-welding sheet material, reinforcing network is expanded metal lath, and expanded metal lath wall thickness is 2mm.
(3) the pre-welding sheet material that butt welding connects reinforcing network carries out rust cleaning cleaning, the foreign matter of rust cleaning cleaning for utilizing ball blast sandblasting to remove surface, employing compressed air is power, material spray is ejected into form spray beam the pre-welding plate surface having welded reinforcing network with the speed of 350m/s, compressed air used is at 0.4Mpa, jet length is 100mm, spray for air compressor produces compressed air, blow the quartz sand in sand tank, sprayed by connecting line and rifle head, the angle of injection direction and reservoir walls surface normal is 15 °; Nozzle selects venturi nozzle, and quartz sand selected by abrasive material, and abrasive material is placed in sand tank, the granularity 0.5mm of abrasive material, and moisture content is less than 1%; The surface roughness credit rating of the pre-welding sheet material of the good reinforcing network of welding after rust cleaning cleaning is according to GB8923-88 " before application steel surface rusting grade and derusting grade ", and derusting grade is Sa2.5 level, roughness >=Ry70 μm.
(4) carry out homogeneous heating to 320 DEG C to pre-welding plate surface, with material loading instrument, PO powder is coated in pre-welding plate surface, after lining system, the thickness of PO powder is 4mm, and the edge of the surrounding of every block pre-welding sheet material reserves 10cm hole and will not serve as a contrast system.
(5) the pre-welding sheet material that step (4) obtains is rolled and is welded into tank body equipment, PO serves as a contrast the inner surface of preparative layer at tank body, the reserved place of tank inner surface pre-welding sheet material is cleared up and cleaning, adopt outside heating method to carry out PO lining system to reserved place, make this place serve as a contrast prepared material complete cure and bond with lining prepared material moieties into close before; After welding is good, the reserved place in the welded seam place between adjacent pre-welding sheet material and step (3) is carried out the repair of PO liner.Last electricity consumption Spark plug optical fiber sensor instrument carries out all standing to reservoir walls and detects without dead angle, if there is indivedual leak source, repairs, until finally complete with flame spraying gun.
This technique is applicable to the large tank of on-the-spot lining Φ >=5000mm processed, the diameter serving as a contrast tank body processed can reach twenty or thirty rice, height can reach twenty or thirty rice, this technique is adopted to serve as a contrast to mould the large-scale storage tank inner wall surface that anticorrosion process process obtains smooth, homogeneous, flawless, bubble, layering and affect other defects of properties of product.
Adopt nondestructive high-frequency spark detector to detect the reservoir walls that the present embodiment process obtains, setting voltage 15000V, by test bar perpendicular to lining face with the evenly movement of the speed lower than 50mm/s, there will not be and puncture or dew point phenomenon.With 1.25 times of pressure, the water pressure test is carried out to storage tank, and keeps 0.5 hour; Storage tank is filled water, static placement 48 hours; All without drainage.Carry out integrity test to the storage tank that the present embodiment process obtains, adopt spark test, voltage >=15KV during experiment, pop one's head at backing layer surface slowly continuous moving, speed is no more than 100mm/s, and storage tank stands intact.
Embodiment 2
The interior wall liner of major diameter tank body equipment of the present invention moulds anticorrosion process, comprises the following steps:
(1) the pre-welding sheet material of tank body equipment is carried out sanction to cut, the pre-welding panel length cut out after cutting is no more than 6 meters, and width is no more than 2 meters, is cleaned by pre-welding sheet material, removes the oil of original attachment, dirt and attachment, and dry; Then pre-welding sheet material is polished, by the corner angle of pre-welding sheet material and sanding burr to level and smooth.
(2) reinforcement of weld net on every block pre-welding sheet material, reinforcing network is expanded metal lath, and expanded metal lath wall thickness is 3mm.
(3) the pre-welding sheet material that butt welding connects reinforcing network carries out rust cleaning cleaning, the foreign matter of rust cleaning cleaning for utilizing ball blast sandblasting to remove surface, employing compressed air is power, material spray is ejected into form spray beam the pre-welding plate surface having welded reinforcing network with the speed of 450m/s, compressed air used is at 0.8Mpa, jet length is 300mm, spray for air compressor produces compressed air, blow the quartz sand in sand tank, sprayed by connecting line and rifle head, the angle of injection direction and reservoir walls surface normal is 30 °; Nozzle selects venturi nozzle, and quartz sand selected by abrasive material, and abrasive material is placed in sand tank, the granularity 1.5mm of abrasive material, and moisture content is less than 1%; The surface roughness credit rating of the pre-welding sheet material of the good reinforcing network of welding after rust cleaning cleaning is according to GB8923-88 " before application steel surface rusting grade and derusting grade ", and derusting grade is Sa2.5 level, roughness >=Ry70 μm.
(4) homogeneous heating to 380 DEG C is carried out to pre-welding plate surface, with material loading instrument, PO powder is coated in pre-welding plate surface, after lining system, the thickness of PO powder is 5mm, and the edge of the surrounding of every block pre-welding sheet material reserves 10-20cm hole and will not serve as a contrast system.
(5) the pre-welding sheet material that step (4) obtains is rolled and is welded into tank body equipment, PO serves as a contrast the inner surface of preparative layer at tank body, the reserved place of tank inner surface pre-welding sheet material is cleared up and cleaning, adopt outside heating method to carry out PO lining system to reserved place, make this place serve as a contrast prepared material complete cure and bond with lining prepared material moieties into close before; After welding is good, the reserved place in the welded seam place between adjacent pre-welding sheet material and step (3) is carried out the repair of PO liner.Last electricity consumption Spark plug optical fiber sensor instrument carries out all standing to reservoir walls and detects without dead angle, if there is indivedual leak source, repairs, until finally complete with flame spraying gun.
This technique is applicable to the large tank of on-the-spot lining Φ >=5000mm processed, the diameter serving as a contrast tank body processed can reach twenty or thirty rice, height can reach twenty or thirty rice, this technique is adopted to serve as a contrast to mould the large-scale storage tank inner wall surface that anticorrosion process process obtains smooth, homogeneous, flawless, bubble, layering and affect other defects of properties of product.
Adopt nondestructive high-frequency spark detector to detect the reservoir walls that the present embodiment process obtains, setting voltage 15000V, by test bar perpendicular to lining face with the evenly movement of the speed lower than 50mm/s, there will not be and puncture or dew point phenomenon.With 1.25 times of pressure, the water pressure test is carried out to storage tank, and keeps 0.5 hour; Storage tank is filled water, static placement 48 hours; All without drainage.Carry out integrity test to the storage tank that the present embodiment process obtains, adopt spark test, voltage >=15KV during experiment, pop one's head at backing layer surface slowly continuous moving, speed is no more than 100mm/s, and storage tank stands intact.
Claims (10)
1. the interior wall liner of major diameter tank body equipment moulds an anticorrosion process, it is characterized in that: comprise the following steps:
(1) the pre-welding sheet material of tank body equipment is carried out sanction to cut, and pretreatment;
(2) reinforcement of weld net on every block pre-welding sheet material;
(3) the pre-welding sheet material that butt welding connects reinforcing network carries out rust cleaning cleaning;
(4) process to step (3) the pre-welding sheet material obtained and carry out PO lining technique processed, the edge of the surrounding of every block pre-welding sheet material reserves 10-20cm hole and will not serve as a contrast system;
(5) the pre-welding sheet material that step (4) obtains is rolled and is welded into tank body equipment; After welding is good, the reserved place in the welded seam place between adjacent pre-welding sheet material and step (3) is carried out the repair of PO liner.
2. the interior wall liner of major diameter tank body equipment according to claim 1 moulds anticorrosion process, it is characterized in that: cut out the pre-welding panel length after cutting in step (1) and be no more than 6 meters, width is no more than 2 meters.
3. the interior wall liner of major diameter tank body equipment according to claim 1 moulds anticorrosion process, it is characterized in that: the pretreatment described in step (1) is: cleaned by pre-welding sheet material, remove the oil of original attachment, dirt and attachment, and dry; Then pre-welding sheet material is polished, by the corner angle of pre-welding sheet material and sanding burr to level and smooth.
4. the interior wall liner of major diameter tank body equipment according to claim 1 moulds anticorrosion process, it is characterized in that: reinforcing network is expanded metal lath, and expanded metal lath wall thickness is 2-3mm.
5. the interior wall liner of major diameter tank body equipment according to claim 1 moulds anticorrosion process, it is characterized in that: in step (3), after rust cleaning cleaning, derusting grade is Sa2.5 level, roughness >=Ry70 μm.
6. the interior wall liner of major diameter tank body equipment according to claim 5 moulds anticorrosion process, it is characterized in that: the foreign matter of rust cleaning cleaning for utilizing ball blast sandblasting to remove surface in step (3), employing compressed air is power, material spray is ejected into form spray beam the pre-welding plate surface having welded reinforcing network with the speed of 350-450m/s, makes surface obtain certain cleannes and roughness.
7. the interior wall liner of major diameter tank body equipment according to claim 6 moulds anticorrosion process, it is characterized in that: compressed air used is at 0.4-0.8Mpa, and jet length is 100-300mm, and the angle of injection direction and pre-welding plate surface normal is 15-30 °; Nozzle selects venturi nozzle, and quartz sand selected by abrasive material, granularity 0.5-1.5mm, and moisture content is less than 1%.
8. the interior wall liner of major diameter tank body equipment according to claim 1 moulds anticorrosion process, it is characterized in that: in step (4), PO lining technique processed is: carry out homogeneous heating to 320-380 DEG C to pre-welding plate surface, with material loading instrument, PO powder is coated in pre-welding plate surface.
9. the interior wall liner of major diameter tank body equipment according to claim 1 moulds anticorrosion process, it is characterized in that: in step (4), after lining system, the thickness of PO powder is 4-5mm.
10. the interior wall liner of major diameter tank body equipment according to claim 1 moulds anticorrosion process, it is characterized in that: in step (5), the repair of PO liner is, at storage tank external spray firelock, the place of needs lining system is heated to 320-380 DEG C, in storage tank, PO powder is coated in reservoir walls by personnel, completes PO lining system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510599791.9A CN105149865B (en) | 2015-09-18 | 2015-09-18 | The inwall lining plastic anticorrosion process of major diameter tank body equipment |
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| CN201510599791.9A CN105149865B (en) | 2015-09-18 | 2015-09-18 | The inwall lining plastic anticorrosion process of major diameter tank body equipment |
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| CN105149865B CN105149865B (en) | 2018-03-02 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106064710A (en) * | 2016-05-27 | 2016-11-02 | 四川蓝星机械有限公司 | Spherical tank anticorrosion process |
| CN110919301A (en) * | 2019-12-05 | 2020-03-27 | 四川石油天然气建设工程有限责任公司 | Preparation method of drilling fluid storage tank |
| CN113046975A (en) * | 2021-03-15 | 2021-06-29 | 扬中市金坤电力设备有限公司 | Full-plastic anti-corrosion process for inner bin of refiner in spinning workshop |
| CN115402662A (en) * | 2022-09-22 | 2022-11-29 | 宁夏新开河储罐有限公司 | Large-size plastic lining anticorrosion storage equipment and preparation method thereof |
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| CN106064710A (en) * | 2016-05-27 | 2016-11-02 | 四川蓝星机械有限公司 | Spherical tank anticorrosion process |
| CN110919301A (en) * | 2019-12-05 | 2020-03-27 | 四川石油天然气建设工程有限责任公司 | Preparation method of drilling fluid storage tank |
| CN110919301B (en) * | 2019-12-05 | 2021-08-06 | 四川石油天然气建设工程有限责任公司 | Preparation method of drilling fluid storage tank |
| CN113046975A (en) * | 2021-03-15 | 2021-06-29 | 扬中市金坤电力设备有限公司 | Full-plastic anti-corrosion process for inner bin of refiner in spinning workshop |
| CN115402662A (en) * | 2022-09-22 | 2022-11-29 | 宁夏新开河储罐有限公司 | Large-size plastic lining anticorrosion storage equipment and preparation method thereof |
| CN115402662B (en) * | 2022-09-22 | 2024-02-27 | 宁夏新开河储罐有限公司 | Large-size plastic-lined anti-corrosion storage device and preparation method thereof |
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