Heat shrink tube for corrosion protection

The external anti-corrosion layer of the steel pipe is usually a three-layer structure (also known as three-layer PE anti-corrosion), Contact with the steel pipe is anticorrosive paint "Primer", the middle is hot melt adhesive, the outermost layer is crosslinked polyethylene. In a few cases, the external anti-corrosion layer of the steel pipe is also adopted as two layers (two layer PE anti-corrosion), and the contact with the steel pipe is a sealing hot melt adhesive, and the outer layer is crosslinked polyethylene. Jacket anticorrosion is composed of foam jacket cover (inner layer), hot melt adhesive (middle layer) and substrate "outer layer". 

Technical requirements see oil and gas industry standards SY/TO413-2002 "Buried steel pipe polyethylene anti-corrosion layer technical standard", SY/T4054-2003 "Radiation crosslinked polyethylene heat shrinkable belt (sleeve)", SY/TO415-1996 "Buried steel pipe rigid polyurethane foam anti-corrosion insulation layer Technical standard".