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GB/T 44574-2024Plastic check valves for anti-pollution for discharge piping systems inside buildings (English PDF)

建筑排水管道系统防污染用塑料止回阀

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

September 29, 2024

Implementation date

April 1, 2025

Scope

GB/T 44574-2024 is the English-translated version of 建筑排水管道系统防污染用塑料止回阀.

GB/T 44574-2024 is the Chinese national standard covering the plastic non-return valve fitted in a building's drainage system to stop backflow and the pollution it carries — the materials and the design, the appearance, colour, dimensions and performance requirements, the lead limit, the density, Vicat softening temperature, melt mass flow rate change and oxidation induction time that say how the compound will age, the oven, drop, flow capacity and watertightness tests, and the inspection rules. First edition, under the China National Light Industry Council. In force from 1 April 2025. Issued on 29 September 2024, it has been in force since 1 April 2025.

Document preview — GB/T 44574-2024

National Standard of the People's Republic of China

ICS: 83.140.30
Classification: G 33

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface... III 1 Scope1
2 Normative references1
3 Terms and definitions, symbols and abbreviations1
3.1 Terms and Definitions1
3.2 Symbols and abbreviations2
4 Materials2
5 Design3
6 Requirements3
6.1 Appearance3
6.2 Color3
6.3 Specifications and dimensions3
6.4 Performance Requirements4
6.5 Lead limit5
7 Test methods5
7.1 State Adjustment5
7.2 Appearance and Color5
7.3 Size5
7.4 Density5
7.5 Vicat softening temperature5
7.6 Melt mass flow rate change rate5
7.7 Oxidation Induction Time6
7.8 Oven test6
7.9 Drop test6
7.10 Flow capacity6
7.11 Watertightness6
7.12 Lead Limit6
8 Inspection Rules7
8.1 Inspection categories7
8.2 Batching and Grouping7
8.3 Factory Inspection7
8.4 Type inspection8
8.5 Decision Rules8
9 Marking, packaging, transportation, storage8
9.1 Logo8
9.2 Packaging8
9.3 Transportation8
9.4 Storage8
Appendix A (Informative) Typical Structure of Check Valve9
References10

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting is required.

Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

This document was proposed by China Light Industry Federation.

This document is under the jurisdiction of the National Technical Committee for Standardization of Plastic Products (SAC/TC 48).

This document was drafted by: Gongyuan Co., Ltd., Zhejiang Weixing New Building Materials Co., Ltd., Aikang Enterprise Group (Zhejiang) Co., Ltd., Gudi Technology Co., Ltd., Taizhou Huangyan District Metrology and Product Quality Safety Testing Institute, Jiangsu Shuangteng Pipe Industry Co., Ltd.

Co., Ltd., Jiangsu Huasu New Building Materials Co., Ltd., and China Wuzhou Engineering Design Group Co., Ltd.

The main drafters of this document are: Huang Jian, Shao Huibin, Yang Xingyue, Li Xianmei, Xia Chunyu, Li Guangzhong, Yang Jianguo, Sun Huali, Wang Yaru.

Plastic check valve for pollution prevention of building drainage pipe system

1 Scope

This document specifies the materials, design, performance and performance of plastic check valves (hereinafter referred to as "check valves") for anti-pollution use in building drainage pipe systems.

It describes the requirements for performance, inspection rules and marking, packaging, transportation, storage, etc., and describes the corresponding test methods.

This document applies to the manufacture and inspection of check valves used to prevent pollution in plastic drainage pipe systems in buildings.

Note. The purchaser is responsible for selecting this product appropriately based on its specific application requirements and in combination with relevant laws, regulations, standards or specifications.

2 Normative references

GB/T 1033.1

GB/T 1040.2

GB/T 1633

GB/T 2828.1

GB/T 2918

GB/T 3682.1

GB/T 5761

GB/T 8801

GB/T 8802

GB/T 8803

GB/T 8806

GB/T 10002.1-2023

GB/T 19278

GB/T 19466.6

GB/T 26125-2011

3 Terms and definitions, symbols and abbreviations

3.1 Terms and Definitions

The terms and definitions defined in GB/T 19278 and the following apply to this document.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 1033.1 · GB/T 1633 · GB/T 2918 · GB/T 3682.1 · GB/T 8802 · GB/T 8806 · GB/T 19466.6 · GB/T 26125-2011

Editions of GB/T 44574

Edition	Title	Revision	Status
GB/T 44574-2024	Plastic check valves for anti-pollution for discharge piping systems inside buildings	current edition	Current

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