This standard specifies the scope, product classification and designation, materials, requirements, test methods, inspection rules, marking, packing, transport and storage of coating plastic steel pipe for water supply (hereinafter referred to as "coating plastic steel pipe").
This standard is applicable to coating plastic steel pipe with nominal dimension no larger than DN 1200 for transporting drinking water; coating plastic steel pipe with nominal dimension larger than DN 1200 or one for transporting other medium fluid may refer to this standard.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition of the normative document is applicable to this standard.
GB/T 1033 "Test Method for Density and Relative Density of Plastics"
GB/T 1040 "Plastics-Determination of Tensile Properties"
GB/T 1633 "Plastics-Thermoplastic Materials-Determination of Vicat Softening Temperature (VST)"
GB/T 1732 "Determination of Impact Resistance of Film"
GB/T 2914 "Plastics-Homopolymer and Copolymer Resins of Vinyl Chloride-Determination of Volatile Matter (including Water)"
GB/T 3091 "Welded Steel Pipe for Low Pressure Liquid Delivery"
GB/T 6554 "Resin Based Reactive Compounds Used for Electrical Insulation-Part 2: Methods of Test-Methods for Coating Powders for Electrical Purposes"
GB/T 6742 "Paints and Varnishes-Bend Test (Cylindrical Mandrel)"
GB/T 8163 "Seamless Steel Tubes for Liquid Service"
GB/T 9119 "Slip-on-welding Plate Steel Pipe Flanges with Flat Face or Raised Face"
GB/T 9124 "Specification for Steel Pipe Flanges"
GB/T 17219 "Safety Evaluation Criteria for Drinking Water Distribution Equipment and Protective Material"
CJ/T 156 "Grooved Couplings"
SY/T 5037 "Spiral Submerged Arc-welded Steel Pipe for Pipelines for Low Pressure Fluid Service"
3 Terms and Definitions
For the purposes of this standard, the following terms and definitions apply.
3.1
Base pipe
It refers to the steel pipe before coated with plastic powder.
3.2
Coating plastic steel pipe
Coating plastic steel pipe is a plastic-steel composite product taking the steel pipe as the base pipe, plastic powder as the coating material, with a layer of plastic coated on its internal surface through melting and a layer of plastic or other anticorrosive coating on its external surface through melting.
4 Product Classification and Designation
4.1 Classification
The coating plastic steel pipe, according to the different internal coating materials, is classified into polyethylene coated steel pipe and epoxy coated steel pipe.
4.2 Designation
The product designation consists of plastic composite steel pipe code, internal coating material code and nominal dimension.
