This standard specifies the material, product classification, requirements, test method, inspection rule, marking, packaging, transportation and storage of steel reinforced polyethylene plastic pipe (hereinafter referred to as composite pipe or SRPE) 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 indoor/outdoor, overhead and buried composite pipes for pressure conveyance of water and drinking water. For the medium conveyed by composite pipe, its temperature for long-term usage and short-term usage of composite pipe shall not exceed 70℃ and 80℃ respectively.
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 Low Carbon Steel Wire for General Uses
GB/T 2828 Sampling Procedures and Tables for Lot-by-lot Inspection by Attributes (Apply to Inspection of Successive Lots or Batches)
GB/T 2918 Plastics - Standard Atmospheres for Conditioning and Testing
GB/T 3681 Test Methods for Plastics Exposure in Natural Climate
GB/T 3682 Determination of the Melt Mass-flow Rate (MFR) and the Melt Volume-flow Rate (MVR) of Thermoplastics
GB/T 6111 Thermoplastics Pipes for the Conveyance of Fluids - Resistance to Internal Pressure - Test Method
GB/T 6671 Thermoplastics Pipes - Determination of Longitudinal Reversion
GB/T 8806 Method for Dimension Measuring of Plastic Pipes
GB/T 13021 Determination for the Carbon Black Content of Polyethylene Pipes and Fittings by Calcination and Pyrolysis
GB/T 17219 Safety Evaluation Criteria for Drinking Water Distribution Equipment and Protective Material
GB/T 17391 Test Method for Thermal Stability of Polyethylene Pipes and Fittings
GB/T 18251 Method for the Assessment of Pigment or Carbon Black Dispersion in Polyolefin Pipes, Fittings and Compounds
GB/T 18252 Plastics Piping and Ducting Systems - Determination of the Long-term Hydrostatic Strength of Thermoplastics Materials in Pipe Form by Extrapolation
GB/T 18475 Thermoplastics Materials for Pipes and Fittings for Pressure Applications - Classification and Designation - Overall Service (Design) Coefficient
GB/T 18476 Polyolefin Pipes for the Conveyance of Fluids - Determination of Resistance to Crack Propagation - Test Method for Slow Crack Growth on Notched Pipes (Notch Test)
3. Term
Nominal pressure
The maximum pressure permitted for the water conveyance by composite pipe at 20℃ (with expected service life of 50 years).
