1.1 This standard is applicable to glass reinforced plastic (GRP) pipes and pipe fittings made through low-pressure contact forming and filament wound forming.
1.2 The intermediate and lower pressure contact forming, specified in this standard, includes single-side non-pressure or low-pressure forming, as well as the wound method of textiles, nonwoven fabric and blanket under low-pressure. The standard is not applicable to the methods and products of pressure forming and semi-dry forming.
1.3 In this standard, fibre glass and unsaturated polyester resin combination is used as reference material, and other material may feasible.
1 Application scope
2 Normative References
3 General Requirements
3.1 Design pressure and design temperature of GRP pipes and pipe fittings
3.2 Structure, cross section/head end, joint, thickness and mechanical performance
4 Pipes and pipe fittings
4.1 Pipes
4.2 Pipe Fittings
4.3 Joints
5 Technical Conditions
5.1 Materials
5.2 Products
6 Inspections
6.1 Inspection of Raw Materials
6.2 Quality Inspection on Product Appearance
6.3 Inspection of Resin Curing Degree
6.4 Inspection of Resin Content
6.5 Inspection of Product Mechanical Performance
6.6 Short-time hydraulic failure pressure test
6.7 Water pressure test
7 Mark, packaging, transportation and storage
7.1 Marks
7.2 Package
7.3 Transportation
7.4 Storage
Annex I: Corrosion-proof Performance of Bisphenol A Polyester Glass-fiber Plastics
Annex II Flange Connection Dimensions
