The materials used for the anti-corrosion processing of spiral steel pipes play a decisive role in the quality of anti-corrosion steel pipes. During anti-corrosion processing, raw materials must be strictly tested. Different anti-corrosion processing requires different anti-corrosion materials.
1. The anti-corrosion of epoxy coal tar pitch mainly uses asphalt anti-corrosion paint and polypropylene non-woven fabric.
2. The main raw materials used in 3PE anti-corrosion steel pipes are polyethylene and polypropylene.
3. Cold wrapping tape refers to the adhesive tape used for anti-corrosion wrapping. Cold wrapping tape generally includes polyethylene (composite) type anti-corrosion tape, polypropylene reinforced fiber anti-corrosion tape, aluminum foil anti-ultraviolet anti-corrosion tape, polyethylene 660 type (modified) Asphalt) tape, double-sided adhesive anti-corrosion inner tape (this tape is rarely used in China, but it is very useful and widely used abroad, and is generally used for export), and epoxy coal tar anti-corrosion tape. The implementation standards are SY/T 0414-98 and SY/T0447-96.
4. Epoxy resin anti-corrosion steel pipes mainly use epoxy resin composite coatings, phenolic epoxy coatings, and polymer composite materials.
5. Cement mortar is mainly suitable for cement mortar anti-corrosion steel pipes.
6. The heat-shrinkable tape generally used for jointing of anti-corrosion steel pipes is designed for the anti-corrosion of the welding joints of buried and overhead spiral steel pipes and the insulation joints of heat-insulating steel pipes. It is composed of a radiation cross-linked polyolefin substrate and a special sealing hot melt adhesive. The special sealing hot melt adhesive can form excellent bonding with polyolefin substrate, steel pipe surface, and solid epoxy coating. The characteristics of cold-wound tape and 3PE heat-shrinkable tape are: it is suitable for the main anti-corrosion layer spiral steel pipe of various materials, while other methods are suitable for the main anti-corrosion layer spiral steel pipe of the same or similar material.
Post time: May-06-2023