GB/T 18742.2-2017 in English

《GB/T 18742.2-2017冷热水用聚丙烯管道系统 第2部分：管材》由TC48（全国塑料制品标准化技术委员会）归口，TC48SC3（全国塑料制品标准化技术委员会塑料管材、管件及阀门分会）执行，主管部门为中国轻工业联合会。

Scope

This part of GB/T18742 specifies polypropylene pipe materials made from polypropylene blends extruded into round cross-sections (hereinafter referred to as pipes). It covers definitions, symbols and abbreviations, materials, product classification, selection of the pipe series S value, requirements, test methods, inspection rules, and markings. This part is applicable together with GB/T18742.1 and GB/T18742.3 for building internal cold and hot water piping systems, including drinking water and heating pipeline systems, etc. Note: The purchaser is responsible for selecting this product in accordance with specific application requirements, relevant regulations, standards or code requirements. This part does not apply to fire protection systems.

Foreword i
1 Scope
2 Normative References
3 Terms and Definitions, Symbols and Abbreviations
4 Materials
5 Product Classification
6 Selection of S Value of Pipe Series
7 Requirements
8 Experiment Method
9 Testing Regulations
10 Signs, Packaging, Transport, Storage
Annex A (Informative) Structural Changes of This Standard In Comparison With ISO 15874-2:
Annex B (Informative) Technical Differences Between this Part and ISO 15874-2:2013 and Their Reasons
Annex C (Informative) Relationship Between Tube Series S and Maximum Allowable Working Pressure (20°C, 50 Years)
Annex D (Informative) System Suitability