3PE anti-corrosion steel pipe execution standard

Description :

　　The anti-corrosion coating of 3pe anti-corrosion steel pipe is based on natural gas, covering all thermal spray coatings and electrophoretic coatings, as well as primer, topcoat, and thinner. According to the person in charge of the Oil and Gas Pipeline and Equipment Anti corrosion Center of China National Petroleum Corporation, the advantages of 3pe anti-corrosion steel pipes are: 1) good adhesion, mechanical properties, and mechanical properties. 2) Can be used for conveying media that can withstand high flow rates, such as water supply, drainage, sewage, gas, burners, chemical, metallurgical, electricity, etc. 3) Can be used as a lining for oil and gas pipelines, oil pipelines, and corrosive media. 4) Can be used for drinking water, purified water, industrial wastewater, and agricultural irrigation. 5) It can also be used for industrial wastewater treatment, water supply, drainage, chemical, textile, plastic, fiber and other industries. 6) It can also be used for the treatment of urban gas pipelines, industrial wastewater, and household waste.

　　The disadvantages of 3pe anti-corrosion steel pipes mainly include the following aspects: 1) high cost. Due to the fact that PE anti-corrosion steel pipes belong to high-density polyethylene, their thermal conductivity is relatively low and they are easy to maintain. After replacement, there may be an increase in maintenance costs. 2) The outer surface needs to be smooth and even. 3) Short service life. Generally speaking, the service life of 3pe anti-corrosion pipes is 10-20 years. 4) Due to the thin wall of the 3pe anti-corrosion pipe, generally between 30mm, it is necessary to roughen the pipe wall after 20 years of use. 5) Required supporting equipment and components. Such as welding machines, shot blasting equipment, sandblasting equipment, etc. 6) High cost.

　　Due to the relatively thin wall thickness of PE anti-corrosion steel pipes, in order to transport them at a lower cost, multi-layer steel pipes are generally used, usually using PE100 or PE80 materials. Generally, polyethylene hot melt connections can be used for pipeline connections, but due to the thin wall thickness of PE anti-corrosion steel pipes, a relatively thin polyethylene hot melt welding connection method is generally used. Equipment and components required for welding.

　　In general, the wall thickness of pipelines is relatively thin. If hot melt butt welding is used, the welding time will be relatively short. The equipment and components that need to be matched are: hot melt butt welding machine, spot hot melt butt welding machine, spot hot melt welding machine, etc. The specialized equipment and components used for general pipeline connections are relatively simple and can be customized according to customer requirements, with high standards for customization. For ordinary pipelines, more advanced equipment and components are required, such as hot melt docking machines, spot hot melt docking machines, spot hot melt welding machines, etc. The equipment and components used for pipeline connection mainly include: hot melt welding machine, spot hot melt welding machine, spot hot melt welding machine, etc.

　　When using 3pe anti-corrosion steel pipes, they can be customized according to customer requirements, and the standards for customization are also relatively high. Hot melt butt welding machines can be used for pipeline connections, but for smaller diameter pipelines, the welding technology for hot melt butt welding is more complex, so welders need to be equipped. Hot melt welding is a more traditional connection method that can be operated by welders step by step without affecting the welding quality. Its advantages are low welding cost and easy operation, but its disadvantages are prone to defects such as porosity, slag inclusion, and incomplete penetration. 10、 Other connection methods for pipelines.

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