First, the advantages of epoxy powder-coated steel pipes
1. Excellent environmental performance: The hot dip plastic process used in drainage-specific plastic coated steel pipes does not contain harmful substances and meets environmental protection requirements. At the same time, it can be recycled, which is conducive to the recycling of resources.
2. Easy installation: Plastic coated steel pipes are light in weight, corrosion-resistant, and have high compressive strength. No welding is required during the installation process, which greatly reduces the difficulty and time of installation.
3. Low maintenance cost: Plastic coated steel pipes have good wear resistance, which can effectively extend the service life and reduce the number and cost of maintenance.
Second, the wear resistance of epoxy powder-coated steel pipes
1. Compared with traditional steel pipes, epoxy powder-coated steel pipes have better wear resistance. Because the surface of the inner plastic coated steel pipe has been specially treated, it has good wear resistance, can effectively resist the erosion of chemical substances such as acids, alkalis, and salts, and prolongs its service life.
2. Epoxy powder-coated steel pipes will not wear during transportation, thereby reducing the number and cost of maintenance of the steel pipe system. At the same time, because the inner coating has good elasticity, it can buffer external impact and reduce the pressure loss of the steel pipe system.
3. The wear resistance of epoxy powder-coated steel pipe is not affected by the internal medium of the steel pipe system. Whether it is conveying water, oil gas, or other media, the coated steel pipe can maintain stable wear resistance.
Third, the thickness standard of epoxy powder-coated steel pipe anti-corrosion layer
The thickness of the anti-corrosion layer of epoxy powder-coated steel pipe is mainly stipulated by the national standard “General Technical Conditions for Buried Steel Pipelines” (GB/T 17306-1998). According to this standard, the thickness of the anti-corrosion layer should meet the following requirements:
1. For ordinary-level anti-corrosion layers, such as polyethylene (PE), high-density polyethylene (HDPE), and chlorinated polyethylene (PVC), the minimum thickness should be 0.7mm; for enhanced-level anti-corrosion layers, such as glass fiber reinforced polyethylene (FRP), epoxy coal tar (API) and epoxy ceramic (EPO), the minimum thickness should be 1.2mm.
2. In actual application, due to the influence of factors such as the topography, soil type, and groundwater level of the steel pipe, the thickness of the anti-corrosion layer needs to be adjusted according to the specific situation. Generally speaking, the thickness of the anti-corrosion layer should be clearly specified in the design documents.
Fourth, factors affecting the thickness of the anti-corrosion layer of epoxy powder-coated steel pipes
1. Environmental factors: Environmental temperature, humidity, soil pH, salinity, and other factors will affect the anti-corrosion effect of the inner and outer plastic-coated carbon steel pipes, thereby affecting the thickness of the anti-corrosion layer. Generally speaking, the worse the environmental factors, the thicker the anti-corrosion layer needs to be.
2. Steel pipe operation parameters: The conveying pressure, flow, temperature, and other parameters of the steel pipe will affect the degree of wear of the inner and outer plastic-coated carbon steel pipes, thereby affecting the thickness of the anti-corrosion layer. Generally speaking, the higher the steel pipe operation parameters, the thicker the anti-corrosion layer needs to be.
3. Steel pipe laying method: The laying method of the steel pipe (such as direct burial, overhead, water pipe, etc.) will affect the contact area between the inner and outer plastic-coated carbon steel pipes and the surrounding environment, thereby affecting the thickness of the anti-corrosion layer. Generally speaking, the more complex the laying method, the thicker the anti-corrosion layer needs to be.
4. Construction quality: The thickness of the anti-corrosion layer of the internal and external plastic-coated carbon steel pipe is greatly affected by the construction quality. If there are phenomena such as missing coating and thick coating during the construction process, the thickness of the anti-corrosion layer will not meet the requirements. Therefore, the construction quality should be strictly controlled during the construction process.
Fifth, the application field of epoxy powder-coated steel pipe
1. Petrochemical industry: used for conveying various corrosive media, such as acid and alkali liquids, oil and gas, etc.
2. Power industry: used for power transmission and distribution lines as cable protection pipes.
3. Construction industry: used for steel pipe systems such as water supply, drainage, ventilation, etc. in buildings.
4. Industrial industry: used for conveying various chemicals, gases, liquids, and other media.
5. Urban heating system: used for conveying hot water and steam, with good thermal insulation performance.
Post time: Jun-09-2025