GB/T 41422-2022 English PDF

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GB/T 41422-2022: Oriented unplasticized poly(vinyl chloride)(PVC-O) pipes and joints for the conveyance of water under pressure
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 41422-2022	649	Add to Cart	5 days	Oriented unplasticized poly(vinyl chloride)(PVC-O) pipes and joints for the conveyance of water under pressure	Valid

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Basic data

Standard ID: GB/T 41422-2022 (GB/T41422-2022)
Description (Translated English): Oriented unplasticized poly(vinyl chloride)(PVC-O) pipes and joints for the conveyance of water under pressure
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G33
Word Count Estimation: 33,331
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 41422-2022: Oriented unplasticized poly(vinyl chloride)(PVC-O) pipes and joints for the conveyance of water under pressure

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Oriented unplasticized poly(vinyl chloride)(PVC-O) pipes and joints for the conveyance of water under pressure ICS 83.140.30 CCSG33 National Standards of People's Republic of China Oriented rigid polyvinyl chloride (PVC-O) for pressure water delivery Tubes and Connections Published on 2022-04-15 2022-11-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration directory Preface III Introduction IV 1 Scope 1 2 Normative references 1 3 Terms and Definitions, Symbols and Abbreviations 2 4 Materials 4 5 Product Category 5 6 Requirements 5 7 Test methods 11 8 Inspection rules 13 9 Marking, transportation, storage 14 Appendix A (Informative) Determination of Axial and Hoop Orientation Factors 15 Appendix B (informative) Reduction factor for temperature to pressure 17 Appendix C (normative) Long-term hydrostatic strength prediction of pipes 18 Appendix D (Informative) Minimum Mate Depth of Socket 19 Appendix E (normative) Ring stiffness 21 Appendix F (normative) system hydrostatic test 22 Appendix G (normative) Internal pressure test under bending condition 25 Reference 28

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. This document is prepared with reference to ISO 16422.2014 Specification for Oriented Rigid Polyvinyl Chloride (PVC-O) Pipes and Connectors for Pressure Water Transfer, and The degree of conformance to ISO 16422.2014 is non-equivalent. Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed by China National Light Industry Federation. This document is under the jurisdiction of the National Standardization Technical Committee of Plastic Products (SAC/TC48). This document is drafted by. Hebei Jiantou Bao Plastic Pipe Industry Co., Ltd., Baoding Lida Plastic Industry Co., Ltd., Yibin Tianyi New Material Technology Co., Ltd. Co., Ltd., Shandong Donghong Pipe Industry Co., Ltd., Beijing Building Materials Inspection and Research Institute Co., Ltd., Xinjiang Tianye (Group) Co., Ltd., National Chemical Building Materials Testing Center (Material Testing Department), Beijing Architectural Design and Research Institute Co., Ltd. The main drafters of this document. Gao Changquan, Li Yanying, Ouyang Sichen, Ni Fengyao, Wang Yingtao, Li Yanjun, Song Xiaoling, Hua Ye, Yan Boxuan.

Introduction

Thermoplastics undergo molecular orientation slightly above the glass transition temperature, which can improve their physical and mechanical properties. The molecular orientation of PVC-U pipe material can be induced by different processing techniques. The commonly used processing technology is. extruded thick wall The billet tube is adjusted at the set temperature, and the hoop and axial orientations are simultaneously activated under controllable conditions. Cool quickly to ambient temperature. After molecular orientation, a layered structure of the tube wall is formed, which can resist microscopic defects in the substrate or scratches on the surface of the tube wall. Brittle failure, so PVC-O pipe has excellent resistance to notch failure, no need for notch resistance test, and no long distance Risk of rapid crack propagation. Due to the improvement of hoop strength after molecular orientation, the wall thickness of PVC-O pipes can be reduced, which can save materials and energy. while improving Impact resistance and fatigue resistance of pipes. The material grade of PVC-O pipe depends on the mixture/formula and drawing ratio of the blank pipe material used. After the material is graded, the mixing of the blank pipe material The material/formula and draw ratio are required to be kept stable, so that the allowable change value of the product orientation factor does not exceed the determination when the PVC-O pipe material is graded. 10-5% of the value, see Appendix A for the test method. Oriented rigid polyvinyl chloride (PVC-O) for pressure water delivery Tubes and Connections

1 Scope

This document specifies the terms and definitions of oriented rigid polyvinyl chloride (PVC-O) pipes (hereinafter referred to as "pipes") and connectors for pressure water delivery Definitions, symbols and abbreviations, materials, product classification, requirements, test methods, inspection rules and signs, transportation, storage. This document applies to water temperature not exceeding 45℃, maximum working pressure (MOP) not exceeding 2.5MPa, underground or above ground (not directly exposed in sunlight) pipes and fittings for water supply, pressure drainage, sewerage and irrigation systems. Note. When the working temperature does not exceed 25℃, the reduction coefficient (ft) of temperature to pressure is equal to 1.For working temperature between 25°C and 45°C, see Appendix B.

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 1033.1-2008 Determination of the density of non-foamed plastics - Part 1.Impregnation method, pycnometer method and titration method GB/T 2828.1 Counting Sampling Inspection Procedure Part 1.Lot-by-Lot Inspection Sampling Plan Retrieved by Acceptance Quality Limit (AQL) GB/T 2918 Standard Environment for Conditioning and Testing of Plastic Samples GB/T 5761 Suspension method general-purpose polyvinyl chloride resin GB/T 6111 Determination of internal pressure resistance of thermoplastic piping systems for fluid transportation GB/T 8802 Determination of Vicat softening temperature of thermoplastic pipes and fittings GB/T 8804.2 Determination of Tensile Properties of Thermoplastic Pipes Part 2.Rigid Polyvinyl Chloride (PVC-U), Chlorinated Polyvinyl Chloride (PVC-C) and high impact polyvinyl chloride (PVC-HI) pipes GB/T 8806 Determination of dimensions of plastic parts of plastic piping systems GB/T 9647 Determination of Ring Rigidity of Thermoplastic Pipes GB/T 13295 Ductile iron pipes, fittings and accessories for water and gas GB/T 13526 Rigid Polyvinyl Chloride (PVC-U) Pipe Dichloromethane Impregnation Test Method GB/T 14152 Test method for external impact resistance of thermoplastic pipes GB/T 17219 Safety Performance Evaluation Standard for Drinking Water Transmission and Distribution Equipment and Protective Materials GB/T 18252 Plastic piping systems Determination of long-term hydrostatic strength of thermoplastic materials in tubular form by extrapolation GB/T 18475 Material Grading and Nomenclature for Thermoplastic Pressure Pipes and Fittings General Use (Design) Factor GB/T 19278-2018 General terms and definitions for thermoplastic pipes, fittings and valves GB/T 19471.1 Plastic piping system rigid polyvinyl chloride (PVC-U) pipe elastic sealing ring type socket joint angle seal test test method GB/T 19471.2 Plastic piping system rigid polyvinyl chloride (PVC-U) pipe elastic sealing ring type socket joint negative pressure sealing test test method GB/T 21300 Determination of Opacity of Plastic Pipes and Fittings GB/T 21873 Specification for material of interface seals for rubber seals for water supply, drainage and sewage pipes GB/T 32018.2 Impact-modified polyvinyl chloride (PVC-M) piping system for water supply - Part 2.Pipe fittings ......

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