The base material of 3PE anticorrosive steel pipe includes seamless steel pipe, spiral steel pipe and straight seam steel pipe. Three-layer polyethylene (3PE) anticorrosive coating has been widely used in petroleum pipeline industry because of its good corrosion resistance, water vapor permeability resistance and mechanical properties. The anticorrosive coating of 3PE anticorrosive steel pipe is very important for the life of buried pipeline. Some pipelines of the same material are not corroded for decades, and some leaks occur in several years. That’s because they use different coatings.
Anti-corrosion Form of Steel Tube Exterior Wall
3PE anticorrosion is generally composed of three layers:
One layer of epoxy powder (FBE > 100um)
Three-layer polyethylene (PE) 2.5-3.7mm
In practice, three kinds of materials are mixed together to form a good anticorrosive coating after processing. Its processing methods are generally divided into winding type and circular die cladding type.
3PE anticorrosive steel pipe coating is a new kind of anticorrosive steel pipe coating, which combines 2PE anticorrosive coating in Europe and FBE widely used in North America. It has been recognized and used worldwide for more than ten years.
The coating of 3PE anticorrosive steel pipe is epoxy powder anticorrosive coating which contacts the surface of steel pipe at the bottom, and the interlayer is a copolymer adhesive with branched functional groups. The surface layer is high density polyethylene anticorrosive coating.
3PE anticorrosive coating combines the high impermeability and high mechanical properties of epoxy resin and polyethylene materials. So far, it is widely recognized that pipeline anticorrosive coatings with good performance are widely used in many projects.