Plastic-coated pipe, also known as plastic-coated steel pipe, steel-plastic composite pipe, and plastic-coated composite steel pipe, is based on steel pipe and is made of hot-dip plastic using PE (modified polyethylene) or EP (epoxy resin) as the main anti-corrosion raw material. A steel-plastic composite steel pipe with a PE anti-corrosion layer or EP anti-corrosion layer is welded on the inner and outer surfaces of the steel pipe (bottom pipe) by spraying, rolling, dipping, and suction welding. The plastic-coated steel pipe has excellent corrosion resistance. At the same time, the coating itself has good electrical insulation and will not cause electrical corrosion. Low water absorption, high mechanical strength, and low friction coefficient can achieve the purpose of long-term use. It can also effectively prevent plant root damage and soil environmental pressure.
Advantages of plastic-coated steel pipe
1. Adapt to underground and humid environments, and can withstand high and low temperatures.
2. Strong anti-interference ability. If the plastic-coated steel pipe is used as a cable casing, it can effectively shield external signal interference.
3. High compressive strength, the maximum pressure can reach 6Mpa.
4. Good insulation performance, as a protective tube for wires, it will never leak electricity.
5. No burrs, smooth pipe wall, suitable for passing wires or cables during construction.
Application fields of plastic coated steel pipes
1. Various forms of circulating water systems (civilian circulating water, industrial circulating water), excellent performance, anti-corrosion life of up to 50 years.
2. Fire water supply system.
3. Water supply and drainage transportation of various buildings (especially suitable for hot and cold water systems in hotels, hotels, and high-end residential areas).
4. Various chemical fluid transportation (the product is resistant to acid, alkali, and salt corrosion).
5. Underground pipelines and cross pipes for wires and cables.
6. Ventilation pipes, water supply, and drainage pipes in mines.
7. Urban sewage pipes.
3PE anti-corrosion steel pipe
3PE anti-corrosion steel pipe refers to a 3-layer structural polyolefin coating (MAPEC) external anti-corrosion steel pipe. The base materials include seamless steel pipe, spiral steel pipe, and straight seam steel pipe. It has good corrosion resistance, water vapor permeability, and mechanical properties, etc. It has been widely used in industrial pipelines. It is a commonly used anti-corrosion pipe in China. There are other anti-corrosion methods, such as IPN8710, FBE epoxy powder, epoxy coal tar asphalt, etc. It usually refers to the corrosion of the outer wall of the steel pipe. The anti-corrosion layer of 3PE anti-corrosion steel pipe is very important for the service life of the buried pipeline. Some pipes of the same material will not corrode after being buried underground for decades, and some pipes will leak within a few years. This is because they use different external anti-corrosion layers.
3PE anti-corrosion steel pipe structure
The first layer of epoxy powder (FBE> 100um)
The second layer of glue (AD) 170250um
The third layer of polyethylene (PE) 2.53.7mm
Advantages of 3PE anti-corrosion steel pipe
Many people only know to use 3PE anti-corrosion steel pipe. Ordinary steel pipes will be severely corroded in harsh use environments, which reduces the service life of steel pipes. The service life of 3PE anti-corrosion steel pipes is also relatively long, and can generally be used for about 30-50 years. The long-term operation can still save relatively large resources, significantly reduce energy costs, has relatively strong waterproofness and corrosion resistance, does not need to be equipped with pipeline trenches, and can be directly buried underground or in water. The construction is simple, and fast, and the overall cost is low. It has good corrosion resistance and impact resistance under low-temperature conditions and can be directly buried in frozen soil under certain conditions.
The use of 3PE anti-corrosion steel pipes
3PE anti-corrosion steel pipes have a wide coverage. It is suitable for underground coal mine water supply and drainage, underground spraying, positive and negative pressure ventilation, gas extraction, fire sprinklers, and other pipe networks. Process wastewater and return water pipelines of thermal power plants. It has good applicability and is suitable for water supply pipes of anti-sprinkler systems. Cable protective sleeves for electricity, communications, highways, etc. It is suitable for high-rise building water supply, heating network heating, tap water projects, natural gas transportation, groundwater transportation, and other pipelines. Process pipelines for conveying corrosive media in industries such as petroleum pipelines, chemical pharmaceuticals, printing, and dyeing. Sewage treatment discharge pipes, sewage pipes, and biological pool anti-corrosion projects. For agricultural irrigation pipes, deep well pipes, drainage pipes, and other networks, it can be said that 3PE anti-corrosion steel pipes are indispensable in the current construction. I believe that through the expansion of science and technology, there will be more brilliant achievements.
Post time: Jun-14-2024