Anti-corrosion production and processing range of elbow polyethylene heat shrinkable tape φDN80—ΦDN1400

The elbow anticorrosive heat shrinkable tape is a new type of anticorrosive material for steel pipe welds with good performance and easy operation. It is composed of a base material and a double layer of hot melt adhesive. The base material is a plastic sleeve (sheet) formed by extrusion, radiation crosslinking, and stretching of polyethylene raw materials. Hot melt adhesive is a kind of special adhesive. It is solid at room temperature. When heated, it can flow in a molten state and can be coated on the substrate. Good adhesion to metal and plastic. The outer anti-corrosion layer of the elbow is usually a three-layer structure (also called three-layer PE anti-corrosion). The anti-corrosion paint primer is in contact with the elbow). The middle is hot melt adhesive. The outermost layer is cross-linked polyethylene. In a few cases, the outer anti-corrosion layer of the steel pipe is also adopted as a two-layer (two-layer PE anti-corrosion). The sealing hot melt adhesive is used to contact the steel pipe, and the outer layer is cross-linked polyethylene. For technical requirements, see the oil and gas industry standard GB/T23257-2017.