GB/T 42734-2023 English PDF

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GB/T 42734-2023: Non-flame retarded dual wall heat-shrinkable polyolefin sleeving- thick and medium wall
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 42734-2023	299	Add to Cart	3 days	Non-flame retarded dual wall heat-shrinkable polyolefin sleeving- thick and medium wall	Valid

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Basic data

Standard ID: GB/T 42734-2023 (GB/T42734-2023)
Description (Translated English): Non-flame retarded dual wall heat-shrinkable polyolefin sleeving- thick and medium wall
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: K15
Classification of International Standard: 29.035.20
Word Count Estimation: 14,171
Date of Issue: 2023-05-23
Date of Implementation: 2023-12-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 42734-2023: Non-flame retarded dual wall heat-shrinkable polyolefin sleeving- thick and medium wall

---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.
ICS 29:035:20 CCSK15 National Standards of People's Republic of China Medium-thick non-flame retardant double-wall polyolefin heat shrinkable tube mediumwal Sheet247: Heat-shrinkable, polyolefinsleeving, dualwal, notflame retarded, thick and medium wal, MOD) Released on 2023-05-23 2023-12-01 Implementation State Administration for Market Regulation Released by the National Standardization Management Committee

table of contents

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Test conditions 1 5 Technical Requirements 1 5:1 General requirements 1 5:2 General requirements and performance requirements 1 5:3 Breakdown voltage requirements 2 6 Test method 3 6:1 Inner diameter, wall thickness and concentricity 3 6:2 Thermal Shock 3 6:3 Length change 3 6:4 Low temperature bendability 3 6:5 Tensile strength and elongation at break4 6:6 Secant modulus under 2% elongation4 6:7 Breakdown voltage 4 6:8 Volume resistivity 4 6:9 Fluid resistance4 6:10 Thermal aging 4 6:11 Long-term thermal aging 4 6:12 Carbon black content 4 6:13 Hardness 4 6:14 Water absorption 4 6:15 Peel strength4 7 Inspection rules 5 7:1 Inspection classification 5 7:2 Inspection item 5 7:3 Batch rules and sampling plan 6 7:4 Judgment rule 6 8 Labeling, packaging, transportation and storage 6 8:1 Flag 6 8:2 Packaging 7 8:3 Transport and storage 7 Appendix A (Informative) Inner diameter and wall thickness 8 Table 1 Performance requirements 2 Table 2 breakdown voltage requirements 3 Table 3 Selection of fluid requirements 3 Table 4 factory inspection 5 Table 5 Type inspection 5 Table A:1 Inner diameter and wall thickness (middle wall) 8 Table A:2 Inner diameter and wall thickness (thick wall) 9

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: This document is modified to adopt IEC 60684-3-247:2019 "Insulated hoses Part 3: Specifications for various types of hoses Part 247: Medium Thick-Wall Non-Flame-Retardant Double-Wall Polyolefin Heat-Shrinkable Tubing": Compared with IEC 60684-3-247:2019, this document has made the following structural adjustments: --- The chapter "Terms and Definitions" has been added; ---Chapter 5 corresponds to Chapter 1, Chapter 6, Table 1~Table 3 and the notes and footnotes in Table 2 of IEC 60684-3-247:2019, where 5:1 corresponds to the third paragraph to the sixth paragraph of Chapter 1 of IEC 60684-3-247:2019, and paragraph 5:2 corresponds to IEC 60684-3-247:2019 Chapter 6, 5:3 corresponds to the notes and footnotes in Table 2; ---Chapter 6 corresponds to the test method in column 2 and the remarks in column 6 in Table 1 of IEC 60684-3-247:2019; ---7:4 The third paragraph corresponds to Chapter 7 of IEC 60684-3-283:2010: The technical differences between this document and IEC 60684-3-247:2019 and their reasons are as follows: --- Deleted the normative references "IEC 60757:1983" and "ISO 11357-3:2018" to meet my country's national conditions and facilitate application; --- The chapter "Naming" has been deleted to conform to my country's national conditions and facilitate application; --- Deleted "storage dimensional stability" and "melting point" to meet my country's national conditions and facilitate application; --- Added the normative reference "GB/T 2828:1-2012" (see 7:3) to meet the technical conditions of our country and facilitate the application; --- IEC 60296:2012 is replaced by GB 2536-2011 with normative references (see Table 3), the consistency program between the two documents The degree is modified to meet the technical conditions of our country and facilitate the application; --- Replaced IEC 60684-2:2011 (see Chapter 6) with the normatively referenced GB/T 7113:2-2014, between the two documents The degree of consistency is modified to meet the technical conditions of our country and facilitate application; --- Changed the "length change", changed "-10" to the minimum value and changed 5 to the maximum value (see Table 1), in order to comply with my country's technical Technical conditions, easy to apply; --- Increase the test temperature tolerance of "low temperature bendability" and the completion test time of "fluid resistance" (see 6:4 and 6:9) to comply with In line with our country's national conditions, easy to apply; --- The chapter "Inspection Rules" (see Chapter 7) has been added to meet the technical conditions of our country and facilitate application; --- The chapter "Signs, packaging, transportation and storage" (see Chapter 8) has been added to meet the technical conditions of our country and facilitate application; --- Deleted the references to conform to my country's national conditions and facilitate application: The following editorial changes have been made to this document: --- In order to coordinate with the existing standards, change the name of the standard to "Medium-thick-wall non-flame-retardant double-wall polyolefin heat-shrinkable tube"; --- The unit "K" is replaced by the unit "℃": Please note that some contents of this document may refer to patents: 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 Standardization Technical Committee of Insulation Materials (SAC/TC51): This document is drafted by: Shenzhen Wall Nuclear Material Co:, Ltd:, Shenzhen Hongshang Material Technology Co:, Ltd:, Guangzhou Kaihengke Plastic Co:, Ltd:, Dalian United Polymer Materials Co:, Ltd:, Shenzhen Gongchuang Polymer Materials Technology Co:, Ltd:, Changchun Zhongke Yinghua Special Materials Materials Co:, Ltd:, Shanghai Pioneer Irradiated Products Factory Co:, Ltd:, Shanghai Changyuan Electronic Materials Co:, Ltd:, Changyuan Electronics (Dongguan) Co:, Ltd: Division, Dongguan Sanlian Heat Shrinkable Material Co:, Ltd:, Guilin Electrical Appliance Science Research Institute Co:, Ltd: The main drafters of this document: Liu Zhanli, Zhong Xiaoguang, Hu Hui, Wang Rui, Mao Xinyuan, Wang Haibo, Jiang Jianming, Tu Wenmin, Zhang Zengguo, Wang Zhi, Zhai Yongai, Liu Xiaobo, Cui Jianguo, Ma Linquan: Medium-thick non-flame retardant double-wall polyolefin heat shrinkable tube

1 Scope

This document specifies the technical requirements, test methods, inspection rules and marking, packaging, Transport and storage: This document applies to medium-thick non-flame-retardant double-wall polyolefin heat-shrinkable tubing with a nominal shrinkage ratio of 3:1 and a maximum service temperature of 100°C:

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document: GB/T 2411-2008 Determination of indentation hardness (Shore hardness) of plastics and hard rubber using a durometer (ISO 868:2003, IDT) GB 2536-2011 Unused mineral insulating oils for electrical fluid transformers and switches (IEC 60296:2003, MOD) GB/T 2828:1-2012 Counting sampling inspection procedure Part 1: Batch-by-batch inspection sampling retrieved by acceptance quality limit (AQL) Plan (ISO 2859-1:1999, IDT) GB/T 7113:1-2014 Insulating hoses - Part 1: Definitions and general requirements (IEC 60684-1:2003, MOD) Note: There is no technical difference between the referenced content of GB/T 7113:1-2014 and the referenced content of IEC 60684-1:2003: GB/T 7113:2-2014 Insulating hoses - Part 2: Test methods (IEC 60684-2:2003, MOD) GB/T 33047:1-2016 Plastic polymer thermogravimetric method (TG) Part 1: General principles (ISO 11358-1:2014, MOD) Note: There is no technical difference between the referenced content of GB/T 33047:1-2016 and the referenced content of ISO 11358-1:2014:

3 Terms and Definitions

This document does not have terms and definitions that need to be defined:

4 Test conditions

In the absence of regulations, medium-thick non-flame-retardant double-wall polyolefin heat-shrinkable tubing should be placed in an oven with forced air circulation at:200 ° C ± The test was performed after shrinking for 10min±1min at 3°C:

5 Technical Requirements

5:1 General requirements Medium-thick-walled non-flame-retardant double-walled polyolefin heat-shrinkable tubing is divided into Type A (medium-walled) and Type B (thick-walled), and the inner diameter is usually not more than:200mm: It is generally black, and the inner diameter and wall thickness are shown in Appendix A, which can also be determined through negotiation between the supplier and the buyer: In special applications, the selection of materials should meet In addition to the requirements of this document, the performance requirements of the application shall also be met: 5:2 General and performance requirements In addition to the general requirements stipulated in GB/T 7113:1-2014, medium-thick non-flame-retardant double-wall polyolefin heat shrinkable tubes should also meet the ......

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