ISO 11299-2:2018 地下ガス供給ネットワークの改修のためのプラスチック配管システム—パート2：連続パイプによるライニング | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the transport of fluids, Subcommittee SC 8, Rehabilitation of pipeline systems.

A list of all parts in the ISO 11299 series can be found on the ISO website.

Introduction

This document is a part of a system standard for plastics piping systems of various materials used for renovation of existing pipelines in a specified application area. System standards for renovation dealing with the following applications are either available or under preparation:

• ISO 11296, Plastics piping systems for renovation of underground non-pressure drainage and sewerage networks;
• ISO 11297, Plastics piping systems for renovation of underground drainage and sewerage networks under pressure;
• ISO 11298, Plastics piping systems for renovation of underground water supply networks;
• ISO 11299, Plastics piping systems for renovation of underground gas supply networks (this series of standards).

These system standards are distinguished from system standards for conventionally installed plastics piping systems by the requirement to verify certain characteristics in the “as installed” condition, after site processing. This is in addition to verification of characteristics of plastics piping systems “as manufactured”.

Each of the system standards comprises a:

• Part 1: General

and all applicable renovation technique family-related parts, which, for gas supply networks, include or potentially include the following:

• Part 2: Lining with continuous pipes (this document);
• Part 3: Lining with close-fit pipes;
• Part 4: Lining with cured-in-place pipes;
• Part 6: Lining with adhesive-backed hoses;
• Part 11: Lining with inserted hoses.

The requirements for any given renovation technique family are specified in Part 1, applied in conjunction with the other relevant part. For example, this document and ISO 11299-1 together specify the requirements relating to lining with continuous pipes. For complementary information, see ISO 11295. Not all technique families are pertinent to every area of application and this is reflected in the part numbers included in each system standard.

A consistent structure of clause headings has been adopted for all parts to facilitate direct comparisons across renovation technique families.

Figure 1 shows the common part and clause structure and the relationship between ISO 11299 and system standards for other applications.

Annex A of this document is normative.

Figure 1 — Format of the renovation System Standards

1 Scope

This document, read in conjunction with ISO 11299-1, specifies requirements and test methods for pipes and fittings which are part of plastics piping systems installed as continuous pipes in the renovation of underground gas supply networks. It is applicable to polyethylene (PE) pipes of three different types:

• PE solid wall single layered pipes (nominal outside diameter, d_n), including any identification stripes;
• PE pipes with co-extruded layers on either or both the outside and inside of the pipe (total outside diameter, d_n), as specified in Annex A ここで, all layers have the same MRS rating;
• Coated PE pipes (outside diameter, d_n) having a peelable, contiguous, thermoplastics additional layer on the outside of the pipe (“coated pipe”), as described in Annex A.

In addition it covers:

• jointing of pipe lengths by means of butt fusion;
• fabricated and injection-moulded fittings made of PE;

It is applicable to PE pipes, fittings and assemblies intended to be used at an operating temperature of 20 °C as the reference temperature.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements 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.

3 Terms and definitions

For the purposes of this document the terms and definitions given in ISO 11299-1 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

Bibliography