Fujian three-layer polyethylene corrosion-quality anti-corrosion steel 3pe

Polyethylene coating is one of three domestic and external corrosion of buried pipelines major technology system. It has good corrosion resistance, low water absorption, high mechanical strength performance in recent years in the domestic underground water, gas, access to the oil path pipe more widely used. Specifications: Ф89mm-Ф1820mm, wall thickness 6mm-20mm. Material: Q235B, Q345B, 10 # steel, 20 # steel, X42-X80 grade and so on. Implementation of the standards: GB / T23257-2009 polyethylene "buried steel pipeline polyethylene coating technology standard" SY / T0413-2002 "buried steel pipeline polyethylene coating technology standards" DIN30670-91 German "steel pipe and pipe fittings coating technology standard "CAN / CSA-Z245.21-M92 Canada" outer polyethylene pipe anti-corrosion coating technology standards "Uses: Widely used in oil pipelines, gas pipelines, heating pipes, water pipes. Polyethylene coating is one of three domestic and external corrosion of buried pipelines major technology system. It has good corrosion resistance, low water absorption, high mechanical strength performance in recent years in the domestic underground water, gas, access to the oil path pipe more widely used. 3PE anti-corrosion polyethylene pipe, also known as three-layer structure of the protective layer PE (3PE), in recent years introduced from abroad advanced anti-corrosion technology. It's called the FBE / extruded polyethylene protective layer structure, the structure consists of three layers: the bottom layer fusion bonded epoxy (≥80μm); the middle layer of adhesive (170-250μm); surface layer of extruded Polyethylene (about 2mm). The total thickness of the protective layer of about 1.8-3.7mm. In the three-tier structure, the main role of fusion bonded epoxy powder coatings are: to form a continuous film, and directly bonding the steel surface, has good chemical resistance and resistance to cathodic stripping properties; and an intermediate layer of adhesive reactive group to form a chemical bond, to ensure the overall coating has good adhesion at higher temperatures. The middle layer is typically a copolymer binder whose main component is a polyolefin, is now widely used vinyl copolymer adhesive. Polar functional groups of the copolymer adhesive with fusion bonded epoxy powder coating epoxy groups can react hydrogen bond or bonds, the intermediate layer to form a good bond with the underlying; nonpolar ethylene portions of the surface layer Polyethylene has a good affinity for, and therefore the intermediate layer and the surface layer also has good adhesion properties. The main role of the polyethylene surface layer is protected from mechanical and anti-corrosion effect, with the traditional two-story structure polyethylene coating has the same effect.