According to the coating form:

Inside coated steel pipe; inside and outside coated steel pipe.

According to the inner coating material, it is divided into:

Polyethylene-coated steel pipe; epoxy-coated steel pipe, large-diameter plastic-coated steel pipe, inner epoxy outer polyethylene steel pipe, inner epoxy outer three-layer structure polyethylene steel pipe.

Classification of plastic-coated composite steel pipe

Model establishment

The product model is composed of product code, coating material code, coating form, nominal diameter, base tube 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: omit and not mark.

Internal coating material code: epoxy resin, EP.

Coated steel pipes for automatic sprinkler systems.

Example:

ZSPT-EPD/150-H means that the base pipe is a welded steel pipe with a nominal diameter of DN150 mm epoxy resin coated steel pipe inside and outside.