Comparison between plastic-coated pipes and 3PE anti-corrosion pipes

Plastic coated pipe
Plastic-coated steel pipes, also known as plastic-coated steel pipes, steel-plastic composite pipes, and plastic-coated composite steel pipes, are based on steel pipes and use PE (modified polyethylene) for hot dip molding or EP (epoxy resin) as the main anti-corrosion raw material. It is a steel-plastic composite steel pipe that is welded with a PE anti-corrosion layer on the inner surface of the steel pipe (bottom pipe) or an EP anti-corrosion layer on the inner and outer surfaces through spraying, rolling, dipping, and suction processes. Plastic-coated steel pipes have excellent corrosion resistance. At the same time, the coating itself also has good electrical insulation and will not cause electrical corrosion. It has low water absorption, high mechanical strength, and a small friction coefficient, which can achieve the purpose of long-term use. It can also effectively prevent damage to plant roots and soil environmental stress.

Advantages of plastic coated steel pipe
1. Adapt to buried and humid environments, and can withstand high and extremely low temperatures.
2. It has strong anti-interference ability. If the plastic-coated steel pipe is used as a cable sleeve, it can effectively shield external signal interference.
3. Good pressure-bearing strength, the pressure can reach 6Mpa.
4. Good insulation performance, as a protective tube for wires, leakage will never occur.
5. No burrs, smooth pipe wall, suitable for threading wires or cables during construction.

Plastic-coated steel pipe application areas
1. Various forms of circulating water systems (civilian circulating water, industrial circulating water) have excellent performance and anti-corrosion life of up to 50 years.
2. Fire water supply system.
3. Water supply and drainage transportation of each building (especially suitable for cold and hot water systems in hotels, hotels, and high-end residential areas).
4. Transportation of various chemical fluids (this product is resistant to acid, alkali, and salt corrosion).
5. Buried pipes and passing pipes for wires and cables.
6. Ventilation pipes, water supply, and drainage pipes of mines and mines.
7. Urban sewage pipelines.

3PE anti-corrosion pipe
3PE anti-corrosion steel pipe refers to a 3-layer structure polyolefin coating (MAPEC) external anti-corrosion steel pipe. The base materials include seamless steel pipes, spiral steel pipes, and straight seam steel pipes. It has good corrosion resistance, water vapor permeability resistance, and mechanical properties. It is widely used in industrial steel pipes. It is a commonly used anti-corrosion steel pipe in China. Other anti-corrosion methods include IPN8710, FBE epoxy powder, epoxy coal pitch, and other anti-corrosion methods. Generally refers to the anti-corrosion of the outer wall of steel pipes. The anti-corrosion layer of 3PE anti-corrosion steel pipes is crucial to the life of buried steel pipes. Some steel pipes of the same material will not corrode after being buried underground for decades, and some will leak after a few years. This is because they use different materials. The outer anti-corrosion layer.

3PE anti-corrosion pipe structure
The first layer of epoxy powder (FBE>100um)
The second layer of adhesive (AD)170~250um
The third layer of polyethylene (PE) 2.5~3.7mm

Advantages of 3PE anti-corrosion pipelines
Many people only know one of the uses of 3PE anti-corrosion steel pipes but don’t know the other. Ordinary steel pipes will suffer from severe corrosion when used in harsh environments, which will reduce the service life of the steel pipes. The use of 3PE anti-corrosion steel pipes The service life is also relatively long, generally, it can be used for about 30-50 years. The long-term operation can still save relatively large resources, significantly reduce energy costs, and also has relatively strong waterproof and corrosion resistance, and does not require attached pipe trenches. It can be directly buried underground or in water, and construction is also simple. It is fast, the overall cost is relatively low, it has good corrosion resistance and impact resistance under low-temperature conditions, and it can be directly buried in frozen soil in certain environments.

3PE anti-corrosion pipeline uses
3PE anti-corrosion steel pipes really have a wide range of functions. They are suitable for underground coal mine water supply and drainage, underground shotcrete, positive and negative pressure ventilation, gas drainage, fire sprinklers, and other pipe networks. Thermal power plants process water waste residue and return water transportation pipelines. It has excellent applicability for water supply pipelines in anti-sprinkler and sprinkler systems. Cable protection sleeves for power, communications, highways, etc. It is suitable for pipelines such as water supply in high-rise buildings, heating network heating, tap water projects, gas transmission, and underground water transmission. Process pipelines for transporting corrosive media in petroleum transportation pipelines, chemical pharmaceuticals, printing and dyeing, and other industries. Sewage treatment discharge pipes, sewage pipes, and biological pool anti-corrosion projects. For agricultural irrigation pipes, deep well pipes, drainage pipes, and other network purposes, it can be said that 3PE anti-corrosion steel pipes are indispensable in current construction, and I believe that through the extension of technology, they will have more brilliant achievements in the future.

Finally, a simple way to identify plastic-coated pipes and 3PE anti-corrosion pipes is that the plastic-coated pipes look very smooth, while the 3PE method pipes have a layer of anti-corrosion polyethylene tape wrapped around the outer layer of the steel pipes, so their appearance looks like joints.