According to the coating form: internally
coated steel pipe; internally and externally coated steel pipe.
According to the different inner coating materials, they are divided into: polyethylene-coated steel pipes; epoxy resin-coated steel pipes, large-diameter plastic-coated steel pipes with inner epoxy and outer polyethylene steel pipes, and inner epoxy and outer three-layer structure polyethylene steel pipes.
Model preparation: The product model consists of product code, coating material code, coating form, nominal diameter, base pipe category, etc.
Base pipe category: welded steel pipe, H; seamless steel pipe, W.
Nominal diameter (mm)
Coating form: internal and external coating, D; internal coating: omitted and not marked.
Inner coating material code: epoxy resin, EP.
Coated steel pipe for automatic sprinkler systems.
Example: ZSPT-EPD/150-H means that the base pipe is a welded steel pipe and an epoxy resin internally and externally coated steel pipe with a nominal diameter of DN150 mm.