3PE anticorrosive steel pipe
base materials include seamless steel pipes
, spiral steel pipes
and straight seam steel pipes
. The three-layer polyethylene (3PE) anticorrosive coating has been widely used in the petroleum pipeline industry due to its good corrosion resistance, water vapor permeability resistance and mechanical properties. An anti-corrosion layer of 3PE anti-corrosion steel pipe is very important to the life of buried pipelines. Some pipelines of the same material will not corrode when buried in the ground for decades, and some will leak in a few years. It is because they use different outer anti-corrosion layers.
3PE anti-corrosion steel pipe refers to a 3-layer structure polyethylene coated (MAPEC) external anti-corrosion steel pipe, which is a commonly used anti-corrosion pipe in China. There are other anti-corrosion methods such as IPN8710, FBE epoxy powder, epoxy coal tar pitch, etc. Generally refers to the corrosion of the outer wall of the steel pipe.
Anti-corrosion of outer wall of steel pipe:
3PE anticorrosion generally consists of 3 layers:
The first layer of epoxy powder (FBE>100um)
The second layer of adhesive (AD) 170～250um
The third layer of polyethylene (PE) 1.8～3.7mm
In actual operation, the three materials are mixed and integrated, and after processing, they are firmly combined with the steel pipe to form an excellent anti-corrosion layer. The processing method is generally divided into two types: winding type and round mold covering type.
3PE anti-corrosion steel pipe coating is (three-layer polyethylene anti-corrosion coating), which is a new kind of anti-corrosion produced by cleverly combining 2PE anti-corrosion coating in Europe and epoxy powder anti-corrosion steel pipe coating (FBE) widely used in North America Steel pipe coating. It has been recognized and used all over the world for more than ten years.
The coating of 3PE anticorrosive steel pipe is epoxy powder anticorrosive coating on the bottom layer and the steel pipe surface, the middle layer is a copolymer adhesive with branch structure functional group, and the surface layer is high density polyethylene anticorrosive coating.
3PE anticorrosive coating combines the high impermeability and mechanical properties of epoxy resin and polyethylene materials. So far, it is the world's recognized anti-corrosion coating for pipelines with the best effect and performance, which has been used in many projects.
Anti-corrosion of inner wall of steel pipe:
There are two types of anti-corrosion on the inner wall of steel pipes: one is hot-melt epoxy resin powder anti-corrosion (high temperature fusion), the other is liquid epoxy coating, commonly used liquid epoxy IPN8710 (normal temperature cold spraying).
3PE anti-corrosion pipe use:
3PE anti-corrosion steel pipe has a wide range of uses, and it is suitable for underground coal mine water supply and drainage, underground spraying, positive and negative pressure ventilation, gas drainage, fire sprinkler and other pipe networks. Process water waste and return water conveying pipelines in thermal power plants. It has excellent applicability for the water supply pipeline of the anti-sprinkler and sprinkler system. Cable protection sleeves for power, communications, highways, etc. It is suitable for high-rise building water supply, heating network heating, tap water engineering, gas transportation, buried water transportation and other pipelines. Process pipelines for transporting corrosive media in industries such as petroleum pipelines, chemical and pharmaceutical industries, printing and dyeing industries. Sewage treatment discharge pipes, sewage pipes and biological pond anticorrosion projects. For agricultural irrigation pipes, deep well pipes, drainage pipes and other networks, it can be said that 3PE anticorrosive steel pipes are indispensable in the current construction, and it is believed that through the extension of science and technology, it will have more brilliant achievements in the future.
The buried 3PE anti-corrosion steel pipe is based on the main standard of polyethylene and high-density polyethylene, and the Vicat softening point is set to be no less than 110℃; the thickness of the outer anti-corrosion layer is determined according to the German standard of low- and medium-density polyethylene. , The service life can be guaranteed for more than 50 years. 3PE anticorrosive steel pipes are used for all kinds of pipes inside and outside the room.