ISO 11177:2019 ガラス質および磁器のエナメル—未処理および飲用水供給用のエナメルバルブおよび圧力パイプ継手の内側と外側—品質要件とテスト | 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, Part 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, Part 2 (see www.iso.org/directives ).

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This document was prepared by Technical Committee ISO/TC 107, Metallic and other inorganic coatings.

This second edition cancels and replaces the first edition (ISO 11177:2016), which has been technically revised. The following change has been made:

• 5.6, the normative reference has been changed from ISO 28706-2 to ISO 28706-1:2008, Clause 9, “Class AA”.

Introduction

The requirements defined in this document regarding the product quality of enamelled valves and pressure pipe fittings for untreated and potable water supply take into account the real stress conditions to which a component can be subjected in the course of its operating life. Typical types of stress are

• during storage: climate, UV radiation, mechanical stress,
• during transportation: mechanical stress, e.g. at certain points (impact), laterally (friction),
• during preparation for installation: cleaning agents, mechanical stress, e.g. at certain points (impact), laterally (friction),
• during installation: mechanical stress, and
• during operation: abrasion caused by the carried medium, corrosion from surrounding medium, mechanical stress from shifting ground loads, UV radiation with valves built in above ground.

1 Scope

This document specifies the requirements for product quality and product testing of enamelled valves and pressure pipe fittings for untreated and potable water supply.

It does not apply to chemical service glass-enamel and apparatus enamel.

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 following terms and definitions apply.

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