This standard specifies the material, product classification, requirements, test method, inspection rules, marking, packaging, transportation and storage of steel framed polyethylene plastic pipe (hereinafter referred to as composite pipe) molded by extruding polyethylene (medium density or high density) thermoplastic resin and the mesh reinforcement frame which is molded by continuous wrapping and welding.
This standard is applicable to the buried composite pipes for the supply of gaseous fuels to towns (the transmission medium temperature in composite pipe is -20℃~40℃).
2. Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. At time of publication, the editions indicated were valid. All standards are subject to revision, and all parties coming to an agreement according to this standard are encouraged to study whether the latest editions of the normative documents are applicable.
GB/T 343-1994 Low Carbon Steel Wire for General Uses
GB/T 1033-1986 Test Method for Density and Relative Density of Plastics
GB/T 2828-1987 Sampling Procedures and Tables for Lot-by-lot Inspection by Attributes (Apply to Inspection of Successive Lots or Batches)
GB/T 2918-1998 Plastics-Standard Atmospheres for Conditioning and Testing (idt ISO 291: 1997)
GB/T 3681-1983 Test Methods for Plastics Exposure in Natural Climate
GB/T 3682-1983 Test Method for the Melt Flow Rate of Thermoplastics
GB/T 6111-1985 Standard Test Method for Time-to-failure of Thermoplastic Pipe under Constant Internal Pressure
GB/T 6671.2-1986 Polyethylene (PE) Pipes - Determination of Longitudinal Reversion (idt ISO 2506: 1981)
GB/T 8805-1988 Determination of Deflection for Rigid Plastic Pipes
GB/T 8806-1988 Method for Dimension Measuring of Plastic Pipes (eqv ISO 3126: 1974)
GB/T 13021-1991 Determination for the Carbon Black Content of Polyethylene Pipes and Fittings by Calcination and Pyrolysis
GB 15558.1-1995 Buried Polyethylene (PE) Pipes for the Supply of Gaseous Fuels
