CJ/T 258-2014 in English

Fiber reinforced polypropylene random copolymer composite pipe

1 Scope

This standard specifies the terms, definitions, symbols and abbreviations, materials, classification of service conditions, product classification and selection of pipe series S values, requirements, test methods, inspection rules, and marking, packaging, transportation and storage of fiber reinforced polypropylene random copolymer composite pipes.

This standard is applicable to the production and inspection of pipes for cold water, hot water and heating piping systems in industrial and civil buildings.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 1033.1 Plastics - Methods for determining the density of non-cellular plastics - Part 1: Immersion method, liquid pyknometer method and titration method
GB/T 1036 Test method for coefficient of linear thermal expansion of plastics between -30℃ and 30℃ with a vitreous silica dilatometer
GB/T 1633 Plastics - Thermoplastic materials - Determination of Vicat softening temperature (VST)
GB/T 1843 Plastics - Determination of izod impact strength
GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 2918 Plastics - Standard atmospheres for conditioning and testing
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 6671-2001 Thermoplastics pipes - Determination of longitudinal reversion
GB/T 8806 Plastics piping systems - Plastics components - Determination of dimensions
GB/T 9341 Plastics - Determination of flexural properties
GB/T 14152 Thermoplastics pipes - Determination of resistance to external blows - Round-the-clock method
GB/T 17219 Standard for safety evaluation of equipment and protective materials in drinking water system
GB/T 18742.1 Polypropylene (PP) piping systems for hot and cold water installations - Part 1:General
GB/T 18742.3 Polypropylene (PP) piping systems for hot and cold water installations - Part 3: Fittings
GB/T 18991 Thermoplastics pipes and fittings for hot and cold water systems
GB/T 19278 General terms and their definitions of thermoplastic pipes, fittings and valves
GB/T 19993 Thermoplastics piping systems for hot and cold water supply - Test method for the resistance of pipes and fittings mounted assemblies to thermal cycling
GB/T 21300 Plastics pipes and fittings - Determination of opacity
SH/T 1770 Plastics - Determination of water content for polyethylene

3 Terms, definitions, symbols and abbreviations

3.1 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

3.1.1
fiber reinforced polypropylene random copolymer composite pipe
composite pipe of three-layer co-extruded structure made by a specific process, consisting of the inner and outer layers of PP-R and the interlayer of fiber reinforced PP-R (fiber refers to silicate or silica fiber herein). Such a pipe with a fiber retention length of not greater than 0.4mm and an interlayer thickness proportion of not less than 30% is called fiber reinforced polypropylene random copolymer composite pipe (F-PPR), while such a pipe with a fiber retention length of greater than 0.4mm and an interlayer thickness proportion of not less than 50% is called M-type fiber reinforced polypropylene random copolymer composite pipe (MF-PPR). The cross section and three-layer structure of F-PPR/MF-PPR are shown in Figures 1 and 2, respectively.

Foreword I
1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviations
4 Materials
5 Classification of service conditions
6 Product classification and selection of pipe series S values
7 Requirements
8 Test methods
9 Inspection rules
10 Marking, packaging, transportation and storage
Annex A (Normative) Method for testing axial coefficient of linear expansion of pipes