GB/T 15558.1-2023Buried polyethylene(PE) piping systems for the supply of gaseous fuels - Part 1: General (English PDF)

Foreword

This document was drafted in accordance with the provisions of GB/T 1.1-2020

"Directives for standardization - Part 1: Rules for the structure and drafting of

standardizing documents".

This document is Part 1 of GB/T 15558 "Buried polyethylene (PE) piping systems for

the supply of gaseous fuels". GB/T 15558 has published the following parts:

- Part 1: General;

- Part 2: Pipes;

- Part 3: Fittings;

- Part 4: Valves;

- Part 5: Fitness for purpose of the system.

This document modifies and adopts ISO 4437-1:2014 "Plastics piping systems for the

supply of gaseous fuels - Polyethylene (PE) - Part 1: General".

Compared with ISO 4437-1:2014, this document has more structural adjustments. See

Appendix A for a comparison of the structural number changes between the two

documents.

Compared with ISO 4437-1:2014, this document has more technical differences; the

outer margins of the involved clauses are marked with a vertical single line (︱). A list

of these technical differences and their reasons is given in Appendix B.

This document has made the following editorial changes:

- To coordinate with the existing standard, CHANGE the name of the standard to

"Buried polyethylene (PE) piping systems for the supply of gaseous fuels - Part 1:

General";

- To facilitate the understanding and use of the standard, DELETE the notes that do

not conform to China's national conditions, changing or adding some notes;

- ADD Appendix C (Informative) "Relationship between maximum working

pressure and working temperature and RCP critical pressure";

- ADD Appendix D (Informative) "Additional information on PE 100-RC materials";

- DELETE Appendix A (Informative) of ISO 4431-1:2014.

1 Scope

This document specifies the material requirements and inspection report requirements

for buried polyethylene (PE) piping systems for the supply of gaseous fuels; describes

the corresponding test methods.

This document, together with other parts of GB/T 15558, is applicable to buried

polyethylene (PE) piping systems for the supply of gaseous fuels, which have an

operating temperature of -20 °C ~ 40 °C and a maximum operating pressure (MOP) not

exceeding 1.0 MPa.

Note 1: The maximum operating pressure of the pipeline system is related to the operating

temperature and the critical pressure of the material's resistance to rapid crack propagation

(RCP), see Appendix C. The reference operating temperature is 20 °C.

Note 2: The MOP of polyethylene pipes is determined based on the design stress sigmaD, the

influence of RCP performance is considered; the MOP depends on the minimum required

strength (MRS) of the material type, the standard dimension ratio (SDR), the overall service

(design) factor (C >= 2), etc.

Note 3: The relevant parties are responsible for appropriately selecting the products specified

in GB/T 15558 (all parts) according to specific application requirements and in combination

with relevant regulations, standards or specifications.

2 Normative references

The contents of the following documents constitute essential provisions of this

document through normative references in the text. Among them, for referenced

documents with dates, only the version corresponding to that date applies to this

document; for referenced documents without dates, the latest version (including all

amendments) applies to this document.

GB/T 1033.1 Plastics - Methods for determining the density of non-cellular plastics

- Part 1: Immersion method, liquid pycnometer method and titration method (GB/T

1033.1-2008, ISO 1183-1:2004, IDT)

GB/T 1033.2 Plastics - Methods for determining the density of non-cellular plastics

- Part 2: Density gradient column method (GB/T 1033.2-2010, ISO 1183-2:2004,

It is tested by direct calcination method according to GB/T 9345.1.

6 Inspection report requirements