GB/T 13663.2-2018 Polyethylene(PE)piping systems for water supply - Part 2: Pipes
1 Scope
This part of GB/T 13663 specifies the terms, definitions, symbols and abbreviated terms, material, product classification, requirements, test methods, inspection rules, marking, packaging, transportation and storage of extruded polyethylene (PE) pipes for water supply (hereinafter referred to as "pipes") using PE compound as raw materials.
In conjunction with the other parts of GB/T 13663, it is applicable to PE piping systems and their assembly for general purposes of pressure water delivery and drinking water delivery and distribution with water temperature not greater than 40 °C and maximum operating pressure (MOP) not greater than 2.0 MPa.
Note 1: The reference operating temperature is 20 °C. See Annex C of GB/T 13663.1-2017 for the pressure reduction coefficient of operating temperature between 0 °C and 40 °C.
Note 2: It is the responsibility of the purchaser to make the appropriate selections from these aspects as specified in this part, taking into account their particular requirements and any relevant regulations and standards or codes.
This part is applicable to PE pipes for water supply with a nominal outside diameter of 16 mm to 2,500 mm manufactured with PE 80 and PE 100 compound.
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 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 2828.1-2012, ISO 2859-1:1999, IDT)
GB/T 2918 Plastics - Standard atmospheres for conditioning and testing (GB/T 2918-1998, idt ISO 291:1997)
GB/T 3682.1 Plastics - Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics - Part 1: Standard method (GB/T 3682.1-2018, ISO 1133.1:2011, MOD)
GB/T 4217 Thermoplastics pipes for the conveyance of fluids - Nominal outside diameters and nominal pressures (GB/T 4217-2008, ISO 161-1: 1996, IDT)
GB/T 6111-2003 Thermoplastics pipes for the conveyance of fluids - Resistance to internal pressure - Test method (ISO 1167: 1996, IDT)
GB/T 6671-2001 Thermoplastics pipes - Determination of longitudinal reversion (eqv ISO 2505:1994)
GB/T 8804.1-2003 Thermoplastic pipes - Determination of tensile properties - Party 1: General test method (ISO 6259-1:1997, IDT)
GB/T 8804.3-2003 Thermoplastic pipes - Determination of tensile properties - Part 3: Polyolefin pipes (ISO 6259-3:1997, IDT)
GB/T 8806-2008 Plastics piping systems - Plastics components - Determination of dimensions (ISO 3126:2005, IDT)
GB/T 9345.1-2008 Plastics - Determination of ash - Part 1: General methods (ISO 3451-1:1997, IDT)
GB/T 10798 Thermoplastics pipes - Universal wall thickness table (GB/T 10798-2001, idt ISO 4065:1996)
GB/T 13021-1991 Determination for the carbon black content of polyethylene pipes and fittings by calcination and pyrolysis (neq ISO 6964:1986)
GB/T 13663.1-2017 Polyethylene(PE)piping systems for water supply - Part 1: General (ISO 4427-1: 2007, MOD)
GB/T 13663.5-2018 Polyethylene (PE) piping systems for water supply - Part 5: Fitness for purpose of the system (ISO 4427-5: 2007, MOD)
GB/T 17219 Standard for safety evaluation of equipment and protective materials in drinking water system
GB/T 18251-2000 Method for the assessment of pigment or carbon black dispersion in polyolefin pipes, fittings and compounds (neq ISO/DIS 18553:1999)
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 18252-2008, ISO 9080:2003, IDT)
GB/T 18475 Thermoplastics materials for pipes and fittings for pressure applications classification and designation - Overall service (design) coefficient (GB/T 18475-2001, eqv ISO 12162: 1995)
GB/T 18476-2001 Polyolefin pipes for the conveyance of fluids -Determination of resistance to crack propagation - Test method for slow crack growth on notched pipes (notch test) (eqv ISO 13479:1997)
GB/T 19278-2003 General terms and their definitions of thermoplastic pipes, fittings and valves
GB/T 19279-2003 Polyethylene pipes - Resistance to slow crack growth - Cone test method (ISO 13480: 1997, IDT)
GB/T 19466.6-2009 Plastics - Differential scanning calorimetry (DSC) - Part 6: Determination of oxidation induction time (isothermal OIT) and oxidation induction temperature (dynamic OIT) (ISO 11357-6: 2008, MOD)
3 Terms, definitions, symbols and abbreviated terms
For the purposes of this document, the terms, definitions, symbols and abbreviated terms given in GB/T 13663.1-2017 and GB/T 19278-2003 apply.
4 Material
4.1 PE compound
PE 80 or PE 100 compound shall be used for manufacturing pipes, which shall meet the requirements of GB/T 13663.1-2017.
4.2 Classification and designation of PE compound
PE compound shall be classified and designated according to the minimum required strength (MRS) specified in GB/T 18475, as shown in Table 1.
Minimum required strength (MRS) is determined in pipe form and extrapolated. The long-term hydrostatic strength of the compound shall be tested according to GB/T 18252. The pressure tests shall be carried out at three temperatures as a minimum, of which two temperatures are fixed at 20 °C and 80 °C, and the third temperature can be freely selected between 30 °C and 70 °C to determine the lower confidence limit (σLPL) of 20 °C and 50 years. The MRS value is extrapolated from the lower confidence limit (σLPL) of 20 °C and 50 years.
Note: Internationally, ISO 9080 and ISO 12162 are generally used for classification and designation of PE compound. ISO 9080 and ISO 12162 correspond to GB/T 18252 and GB/T 18475 respectively.
Foreword i
1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviated terms
4 Material
5 Product classification
6 Requirements
7 Test methods
8 Inspection rules
9 Marking
10 Packaging, transportation and storage
Annex A (Informative) Structural changes of this part with respect to ISO 4427-2: 2007
Annex B (Informative) Technical differences between this part and ISO 4427-2: 2007 and their causes
Annex C (Normative) Layered pipes
Annex D (Informative) PE 100 compound and pipes with high resistance to slow crack growth
Annex E (Informative) Relationship between PN, MRS, S, and SDR
Bibliography
