ISO 13257:2018 非圧力用途向けの熱可塑性プラスチック配管システム—高温サイクルに対する耐性の試験方法 | ページ 2

Foreword

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The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, 2 (see www.iso.org/directives ).

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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 1, Plastics pipes and fittings for soil, waste and drainage (including land drainage).

This second edition cancels and replaces the first edition (ISO 13257:2010), which has been technically revised. The major modifications to the previous edition are:

• revision of the Scope to delete the references to application areas"B","BD" and"UD";
• addition in the Scope of the range of nominal outside diameters of components to which this method is applicable;
• addition of a definition for “sagging”;
• complete review of Clause 6, Test assemblies, in particular distinction between test assemblies including pipes with integral sockets and fittings with socket and spigot (Figure 1) and test assemblies including pipes without integral socket and fittings with sockets (Figure 2) for components d_n ≥ 40 mm;
• Clause 7, addition of Figure 4 to illustrate the measuring point of the column of water.

1 Scope

This document specifies a test method for determining the resistance to elevated temperature cycling of thermoplastics piping systems for non‑pressure applications, inside buildings or buried in the ground within the building structure.

This document is applicable to piping systems with components of nominal outside diameters up to and including 200 mm.

Although limited to nominal outside diameters up to and including 200 mm, the test results may be extrapolated to products of larger nominal outside diameters from the same range.

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 and symbols

3.1 Terms and definitions

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

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

3.2 Symbols

For the purposes of this document, the symbols given in ISO/TS 7024 and the following apply: