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GB/T 41486-2022Corrugated metal hose assemblies for domestic drinking water pipes (English PDF)

生活饮用水管道用波纹金属软管

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

April 15, 2022

Implementation date

November 1, 2022

Scope

GB/T 41486-2022 is the English-translated version of 生活饮用水管道用波纹金属软管.

GB/T 41486-2022 is the Chinese national standard for corrugated metal hose assemblies in drinking water pipelines to take up displacement, installation deviation and ground subsidence, to absorb vibration and to cut noise.

It covers hoses of nominal size DN50 to DN400 working at up to 80 °C and designed for up to 1.6 MPa; smaller hoses and other service conditions may follow it for reference.

It gives the product structure - corrugated pipe, mesh sleeve, nozzle and flange - and the specifications, then the requirements for materials, manufacture, appearance, dimensions, non-destructive testing of the welds, bellows flattening, hygiene evaluation and performance, with their inspection methods.

It closes with the inspection classification, factory inspection and type test, and the rules for marking, packaging, transport, storage and installation. It was issued on 15 April 2022 and has applied since 1 November 2022.

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Document preview — GB/T 41486-2022

National Standard of the People's Republic of China

ICS: 23.040.70
Classification: J 15

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

Preface
1 Scope
2 Normative references
3 Terms and Definitions
4 Product Structure and Specifications
4.1 Product Structure
4.2 Product Specifications
5 Requirements
5.1 Materials
5.2 Manufacturing
5.3 Appearance
5.4 Size
5.5 Nondestructive testing of welds
5.6 Bellows Flattening Test
5.7 Hygiene evaluation
5.8 Performance
6 Inspection method
6.1 Appearance
6.2 Size
6.3 Non-destructive testing of welds
6.4 Bellows Flattening Test
6.5 Hygiene evaluation
6.6 Performance
7 Inspection rules
7.1 Inspection classification
7.2 Factory inspection
7.3 Type test
8 Marking, packaging, transportation, storage and installation
8.1 Signs
8.2 Packaging
8.3 Transport
8.4 Storage
8.5 Installation
Reference

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 of Standardization Documents" drafted.

1 Scope

This document specifies the terms and definitions, product structure and specifications, requirements, inspection methods, inspection rules, marking, packaging, transportation, storage and installation.

This document applies to the use of drinking water piping systems for compensating displacement, installation deviation, ground subsidence, absorbing vibration and reducing noise.

The corrugated metal hose (hereinafter referred to as the hose) used has a nominal size range of DN50~DN400, the working temperature is not more than 80 °C, and the design pressure is not more than 1.6 MPa. The hoses for drinking water pipelines whose nominal size is less than DN50 and other working conditions can be implemented by reference.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document.

GB/T 191 Graphical signs of packaging, storage and transportation

GB/T 246 Test method for flattening of metal pipes

GB/T 1220 stainless steel rod

GB/T 3280 Stainless Steel Cold Rolled Steel Plate and Strip

GB/T 4237 Stainless steel hot-rolled steel sheet and strip

GB/T 4240 stainless steel wire

GB/T 14525-2010 General technical conditions for corrugated metal hoses

GB/T 14976 Stainless steel seamless steel pipe for fluid transportation

GB/T 17219 Safety Evaluation Standard for Drinking Water Transmission and Distribution Equipment and Protective Materials

GB/T 24511 Stainless steel and heat-resistant steel plates and strips for pressure equipment

GB/T 30788 Code for operation of externally wound anti-corrosion cold-wound petrolatum tape for steel pipes

NB/T 47010 Stainless steel and heat-resistant steel forgings for pressure equipment

NB/T 47013.2 Non-destructive testing of pressure equipment - Part 2: Radiographic testing

NB/T 47013.5 Nondestructive Testing of Pressure Equipment Part 5: Penetrant Testing

NB/T 47014 Welding procedure qualification for pressure equipment

SY/T 0414 Technical standard for anti-corrosion coating of polyolefin adhesive tapes for steel pipes

3 Terms and Definitions

Terms and definitions defined in GB/T 14525-2010 apply to this document.

4 Product structure and specifications

4.1 Product Structure

The hose is generally composed of corrugated pipe, mesh sleeve, nozzle and flange, etc. The typical structure of the hose is shown in Figure 1.

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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

Similar standards

GB/T 10541-2023|GB/T 14525-2010|GB/T 15700-2008|GB/T 16693-1996|GB/T 19285-2026|GB/T 47414-2026

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