ISO 28721-5:2016 ガラス質および磁器のエナメル—プロセスプラント用のガラス張りの装置—パート5：欠陥の提示と特性評価 | ページ 2

Foreword

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The committee responsible for this document is ISO/TC 107, Metallic and other inorganic coatings, and in collaboration with Technical Committee CEN/TC 262, Metallic and other inorganic coatings.

ISO 28721 was prepared by the European Committee for Standardization (CEN) Technical Committee CEN/TC 262, Metallic and other inorganic coatings, in collaboration with ISO Technical Committee ISO/TC 107, Metallic and other inorganic coatings, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).

ISO 28721 consists of the following parts, under the general title Vitreous and porcelain enamels — Glass-lined apparatus for process plants:

• Part 1: Quality requirements for apparatus, components, appliances and accessories
• Part 2: Designation and specification of resistance to chemical attack and thermal shock
• Part 3: Thermal shock resistance
• Part 4: Quality requirements for glass-lined flanged steel pipes and flanged steel fittings
• Part 5: Presentation and characterization of defects

1 Scope

This part of ISO 28721 establishes a system for the cataloguing of defects in enamellings for chemical service and vessels. In addition, it describes some types of areas in which defects have been treated and which can easily be confounded with enamelling defects. It serves for a consistent language use concerning the designation and characterization of enamelling defects.

This part of ISO 28721 is limited to detectable defects and does not purport to fully take into consideration all occurring types of defects. It does not evaluate enamelling defects; the classification carried out is based on experience and corresponds, as far as possible, to ISO 28721-1.

2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. 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.