Hot-dip plastic steel pipes for power wiring [ ] are currently ideal anti-corrosion effects for transporting petroleum, natural gas, salt brine, etc. They are low-cost and practical steel anti-corrosion pipelines. They are widely used for liquid transportation in petrochemical industry, firefighting, etc., and have a service life of more than 10 years. Single-layer and double-layer sintered epoxy powder anti-corrosion B double-layer polyethylene and three-layer polyethylene anti-corrosion double-layer polypropylene anti-corrosion and three-layer polypropylene external coating projects. Implement standard epoxy sintered powder anti-corrosion B/B after the service life is up. The high-density polyethylene jacket anti-corrosion structure is made of high-density polyethylene material wrapped on the outer surface of the steel pipe. It has extremely high mechanical strength and excellent The excellent corrosion resistance can protect steel pipes from damage caused by external factors during transportation, installation and use. Antioxidants, UV stabilizers and carbon black should be added to the outer casing. The polyethylene outer casing is easy to age. If it is stored in the open air, it should be covered with a tarpaulin. The stacking place should be away from high heat and fire sources. After being made into anti-corrosion steel pipes, it is forbidden to be exposed to the sun or quenched. Otherwise, the polyethylene outer casing will easily crack and affect the product. performance and longevity.
Anti-corrosion steel pipes are widely used in pipeline engineering fields such as petroleum, chemical industry, natural gas, heating, sewage treatment, water sources, bridges, and steel structures in my country. The quality is guaranteed, welcome to negotiate screenshot_copy/>
The external anti-corrosion layer of long-distance pipelines is no longer dominated by petroleum asphalt. There are now two layers of coal tar enamel, fused epoxy powder B, and three layers. Coatings are used in different projects.
Coal tar enamel Coal tar enamel was once the most widely used coating in Western advanced countries. It has a series of advantages such as good anti-corrosion properties, good bacterial resistance, soil root thorn resistance, and long service life. However, there are It has poor mechanical properties and becomes brittle when flowing at high temperatures and becomes brittle at low temperatures. It is prone to damage during transportation and construction. In actual operation, due to heavy damage, the cathodic protection current density is relatively large.
B Sintered epoxy powder has a wide operating temperature range, good resistance to soil stress, good resistance to chemical media immersion, high hardness and small friction coefficient, and does not produce cathodic protection shielding. It is an excellent external anti-corrosion coating, but there are still some disadvantages. To the best of your ability. The single layer B is thin and brittle, and has little impact resistance. Another disadvantage of B is its high water absorption rate.
The two layers have a series of advantages such as good impact resistance, low water vapor permeability, resistance to chemical media immersion, good long service life and easy repair. Due to the high mechanical strength, which is conducive to repair, the probability of pipeline damage during actual operation is less than that of other types of coatings. Therefore, it has the advantages of small cathodic protection current density, large station spacing between cathodic protection stations, and extremely low cathodic protection operating costs. The big disadvantage of the two layers is that the bonding performance between the adhesive and the pipe is far inferior to that of the epoxy resin. Once the adhesive is lost, the steel pipe under the peeled coating will not receive sufficient cathodic protection, resulting in cathodic protection shielding.
The three layers are epoxy paint, the second layer is adhesive, and the third layer is extruded polyethylene outer protective layer. The layers are closely bonded to each other to form a composite structure, which complements each other's strengths. It uses the strong bonding force between epoxy powder and the surface of the steel pipe to improve the adhesion. It uses extruded polyethylene's excellent mechanical strength, chemical stability, insulation resistance, plant root penetration resistance, water penetration resistance, etc. to improve its overall performance. , making the overall performance of the three-layer anti-corrosion coating more outstanding and comprehensive. Three-layer polyethylene/double-layer polyethylene anti-corrosion seamless pipe, spiral pipe, straight seam pipe
Steel pipe diameter three-layer polyethylene anti-corrosion seamless steel pipe Cangzhou Longdu Pipe Industry Co., Ltd. specializes in the production, processing, and sales of anti-corrosion pipes and anti-corrosion pipes Steel pipe refers to a layer-structured polyolefin-coated external anti-corrosion steel pipe, which is a commonly used anti-corrosion pipe in China. Screenshot_Copy/>
Epoxy powder dipping process Anti-corrosion epoxy powder has always been applied by electrostatic spraying process. Because the epoxy powder dipping process is troubled by adhesion problems, the epoxy powder dipping has never been popularized. In recent years, with the successful development of Sanye's special phosphating solution for epoxy powder dipping, the adhesion problem of the epoxy powder dipping process has been overcome for the first time, and the emerging process of epoxy powder dipping has begun to appear. This product is widely used and is suitable for the anti-corrosion of steel structures and mechanical equipment, various storage tanks, transportation pipelines and other steel materials in marine facilities, petrochemical industry, construction industry and other industrial and mining enterprises. Anti-corrosion steel pipes are widely used in my country's petroleum, chemical, natural gas, thermal, sewage treatment, water sources, bridges, steel structures and other pipeline engineering fields
Hot-dip plastic steel pipe for power wiring