GB/T 41720-2022 English PDF

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GB/T 41720-2022: Heat-shrinkable chlorinated polyolefin sleeving
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 41720-2022	269	Add to Cart	3 days	Heat-shrinkable chlorinated polyolefin sleeving	Valid

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Basic data

Standard ID: GB/T 41720-2022 (GB/T41720-2022)
Description (Translated English): Heat-shrinkable chlorinated polyolefin sleeving
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: K15
Classification of International Standard: 29.035.20
Word Count Estimation: 14,153
Date of Issue: 2022-10-14
Date of Implementation: 2023-05-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 41720-2022: Heat-shrinkable chlorinated polyolefin sleeving

---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.
Heat-shrinkable chlorinated polyolefin sleeving ICS 29.035.20 CCSK15 National Standards of People's Republic of China Heat Shrinkable Chlorinated Polyolefin Tubing Published on 2022-10-12 2023-05-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration directory Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Test conditions 1 5 Technical Requirements 1 6 Test method 5 6.1 Inner diameter, wall thickness and concentricity 5 6.2 Thermal shock 5 6.3 Length variation5 6.4 Low temperature bendability 5 6.5 Tensile strength and elongation at break 5 6.6 Tensile Stress at.200% Elongation 5 6.7 Breakdown voltage5 6.8 Volume resistivity5 6.9 Flame spread 5 6.10 Copper Corrosion 5 6.11 Colour fastness to light5 6.12 Resistant to selected fluid 6 6.13 Mass per unit length 6 6.14 Heat aging 6 6.15 Water absorption 6 6.16 Restrictive contractions 6 6.17 Mold resistance 6 6.18 Shelf life 6 7 Inspection Rules 6 7.1 Inspection classification 6 7.2 Inspection items 6 7.3 Batching Rules and Sampling Plan 7 7.4 Decision Rule 7 8 Marking, packaging, transportation and storage 7 8.1 Flags 7 8.2 Packaging 7 8.3 Transport and storage7 Table 1 Dimensions and mass requirements (nominal shrinkage ratio 1.7.1) 2 Table 2 Dimensions and mass requirements (nominal shrinkage ratio 2.1) 2 Table 3 Performance requirements3 Table 4 Breakdown Voltage Requirements3 Table 5 Selection of fluid requirements4 Table 6 Additional performance requirements4 Table 7 Factory Inspection 6 Table 8 Type Inspection 7

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 revised and adopted IEC 60684-3-205.2011 "Insulated Hose Part 3.Specifications for Various Types of Hose Part 205.Resistance Heat Shrinkable Chlorinated Polyolefin Tubing with Nominal Shrinkage Ratios of 1.7.1 and 2.1". Compared with IEC 60684-3-205.2011, this document has made the following structural adjustments. --- Added "Terms and Definitions" chapter; --- Chapter 5 corresponds to Chapter 1, Chapter 5, Chapter 7 and Tables 1 to 6 in IEC 60684-3-205.2011, where the first paragraph corresponds to Chapter 5 of IEC 60684-3-205.2011, the second paragraph corresponds to Chapter 7 of IEC 60684-3-205.2011, and the third paragraph corresponds to IEC 60684-3-205.2011 Chapter 1, paragraphs 2 to 4; --- Chapter 6 corresponds to the test methods in Table 3 and Table 6 in IEC 60684-3-205.2011 and the remarks in the 6th column; ---7.4 corresponds to Chapter 6 in IEC 60684-3-205.2011. The technical differences between this document and IEC 60684-3-205.2011 and their reasons are as follows. --- Deleted the "naming" chapter in IEC 60684-3-205.2011, and deleted the normative reference to IEC 60757 (see IEC 60684-3-205.2011 Chapter 3), in line with my country's national conditions; --- Deleted the long-term aging elongation of performance requirements in IEC 60684-3-205.2011 (see IEC 60684-3-205.2011 Table 3), in line with my country's national conditions; --- Deleted S-1714, H-520, O-1176 and O-142 of the fluid requirements in IEC 60684-3-205.2011 (see IEC 60684-3-205.2011 Table 5), in line with my country's national conditions; --- Added the soaking time and the completion time of the selected fluid in the test method chapter (see 6.12) to meet the national conditions of our country; --- Added a chapter on inspection rules (see Chapter 7) and the normative reference document GB/T 2828.1-2012, for inspection items, sampling The scheme and judgment rules are stipulated to facilitate the standardization of product inspection; --- Added a chapter on marking, packaging, transportation and storage (see Chapter 8) to facilitate specification of product marking, packaging, transportation and storage requirements. The following editorial changes have been made to this document. --- In order to coordinate with my country's technical standard system, the standard name is changed to "Heat Shrinkable Chlorinated Polyolefin Pipe"; --- Replace the unit "K" with the unit "℃". 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 Electrical Equipment Industry Association. This document is under the jurisdiction of the National Technical Committee for Standardization of Insulating Materials (SAC/TC51). This document is drafted by. Shenzhen Wall Nuclear Materials Co., Ltd., Shenzhen Hongshang Material Technology Co., Ltd., Guangzhou Kaihengke Plastics Co., Ltd., Stand Testing Group Co., Ltd., Changzhou Wall Nuclear Material Co., Ltd., Wenzhou Hongte Heat Shrinkable New Material Technology Co., Ltd. Company, Guilin Saimeng Testing Technology Co., Ltd. The main drafters of this document. Zheng Haimei, Zhong Xiaoguang, Hu Hui, Zhang Bo, Bu Chengcheng, Song Dachun, Wang Hongxue, Zhai Yongai, Ma Linquan. Heat Shrinkable Chlorinated Polyolefin Tubing

1 Scope

This document specifies the technical requirements, test methods, inspection rules, and marking, packaging, transportation and storage of heat-shrinkable chlorinated polyolefin pipes. This document applies to flame retardant, heat-shrinkable chlorinated polyolefin pipes with nominal shrinkage ratios of 1.7.1 and 2.1 and service temperature of 120°C.

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 1690-2010 Test method for liquid resistance of vulcanized or thermoplastic rubber (ISO 1817.2005, MOD) Note. There is no technical difference between the quoted content of GB/T 1690-2010 and the quoted content of ISO 1817.2005. GB/T 2828.1-2012 Counting Sampling Inspection Procedures Part 1.Lot-by-Lot Inspection Sampling Retrieved by Acceptance Quality Limit (AQL) Plan (ISO 2859-1.1999, IDT) GB/T 7113.1-2014 Insulated hoses - Part 1.Definitions and general requirements (IEC 60684-1.2003, MOD) Note. There is no technical difference between the quoted content of GB/T 7113.1-2014 and IEC 60684-1.2003. GB/T 7113.2-2014 Insulated Hose Part 2.Test Methods (IEC 60684-2.2003, MOD) Note. There is no technical difference between the quoted content of GB/T 7113.2-2014 and the content of IEC 60684-2.2003. Note. GB/T 19275-2003 Evaluation of the potential biodegradation and disintegration ability of materials under the action of specific microorganisms (ISO 846.1997, NEQ)

3 Terms and Definitions

There are no terms and definitions that need to be defined in this document.

4 Test conditions

Unless otherwise specified, heat shrinkable chlorinated polyolefin pipes shall be shrunk at 175°C ± 3°C in an oven with forced air circulation Test after 5min±1min.

5 Technical requirements

In addition to the general requirements specified in GB/T 7113.1-2014, heat-shrinkable chlorinated polyolefin pipes should also comply with Tables 1 to 6 requirements. The breakdown voltage shall be tested in accordance with the provisions of Chapter 22 of GB/T 7113.2-2014, and the average value of the breakdown voltage shall comply with the provisions of Table 4. The boost rate is 500V/s. The inner diameter of the heat-shrinkable chlorinated polyolefin tube should be 102mm, and the standard color is black. Except for the sizes or colors specified in this document, in Other sizes or colors may be added, provided that the provisions of Table 3, Table 4, Table 5 and Table 6 (if applicable) are met. The material in this document is not particularly With limitations, materials other than chlorinated polyolefins may be used as long as the performance requirements of this document are met. ......

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