GB/T 41254-2022 English PDF

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GB/T 41254-2022: Functional safety assessment method of explosive protective system
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 41254-2022	379	Add to Cart	4 days	Functional safety assessment method of explosive protective system	Valid

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Basic data

Standard ID: GB/T 41254-2022 (GB/T41254-2022)
Description (Translated English): Functional safety assessment method of explosive protective system
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: N10
Word Count Estimation: 19,119
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 41254-2022: Functional safety assessment method of explosive protective system

---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.
Functional safety assessment method of explosive protective system ICS 13.110 CCSN10 National Standards of People's Republic of China Functional safety assessment methods for explosion protection systems Published on 2022-03-09 2022-10-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration directory Preface I Introduction II 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 General Principles of Functional Safety Assessment 2 5 Functional Safety Assessment Procedure 3 6 Documentation 7 Appendix A (Informative) Functional Safety Assessment Example 8 Appendix B (Informative) Failure Identification Method 12 Reference 14 Figure 1 Functional safety assessment process of explosion protection system 2 Figure A.1 Explosion suppression and isolation systems for dust collectors8 Figure A.2 System functional block diagram 9 Figure B.1 Fault tree analysis of power supply 13 Table A.1 Example 9 of HRD fire extinguisher component failure rates Table A.2 Consequences and Dangerous Degrees of Failure of HRD Fire Extinguisher Components 10 Table A.3 Average probability of failure (PFDavg) when explosion suppression function is required 11

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. 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 Machinery Industry Federation. This document is under the jurisdiction of the National Technical Committee for Standardization of Industrial Process Measurement and Control (SAC/TC124). This document is drafted by. Guangzhou Special Electromechanical Equipment Testing Research Institute, Machinery Industry Instrumentation Comprehensive Technology and Economic Research Institute, Dongguan Huizhou Le Environmental Protection Co., Ltd., National Explosion-proof Equipment Quality Supervision and Inspection Center (Guangdong), Pretag (Nanjing) Safety Equipment Co., Ltd., Zhejiang Supcon Technology Co., Ltd., Northeastern University, Guangdong Normal University of Technology, South China University of Technology, Dongguan New Energy Technology Co., Ltd., China Special Equipment Inspection and Research Institute, Guangdong University of Technology. The main drafters of this document. Wang Xinhua, Xiong Wenze, Lin Weibo, Shi Xueling, Liang Jun, Qiu Kun, Meng Zouqing, Liu Yao, Zhang Yan, Jiang Zhanghe, Zhong Shengjun, Yang Yong, Tang Peng, Zhu Jie, Liu Xiaoliang, Jin Jianghong, Shao Wei, Chen Chaoyang, Huang Jianfeng, Xie Xiaopeng, Chen Zuzhi, Ma Lei, Zhou Youzheng, Yan Bingjun, Ren Junmin, Liu Aihua, Shuai Bing, Zhu Minglu, Zhang Yabin.

Introduction

In order to ensure the consistency of functional safety assessment procedures and information for the design and manufacture of explosion protection systems for explosive atmospheres, it is necessary to Standardize. A functional safety assessment is a tool that provides the basic link between the manufacturer and the user. This document is intended for use in explosive atmospheres Bomb protection systems establish a methodology for achieving functional safety, reliability and effectiveness. When the occurrence of an explosion is unavoidable, the explosion protection system can immediately terminate the explosion and/or limit its impact and reduce the risk of explosion reduced to acceptable levels. When designing an explosion protection system, by properly analyzing the expected failure of the system, it can effectively improve and protect the system. Verify the functional safety of the explosion protection system. Therefore, it is necessary to carry out functional safety assessment of explosion protection system. This document can protect against explosion It provides decision-making advice and guides the formulation of relevant standards for the functional safety of specific types of explosion protection systems. Functional safety assessment methods for explosion protection systems

1 Scope

This document describes the terms and definitions, evaluation general principles, evaluation procedures and functional safety evaluation methods of explosion protection systems for explosive atmospheres file records. This document is applicable to the functional safety assessment of explosion protection systems in the design, manufacture, use, maintenance and inspection. This document does not apply to the following situations. --- identification of potential ignition sources and risk assessment of ignition hazards; --- Functional safety assessment of the explosion hazard environment monitoring system; --- Verification of compliance for specific types of explosion protection systems.

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 2900.35-2008 Electrical terminology equipment for explosive atmospheres GB/T 20438 (all parts) Functional safety of electrical/electronic/programmable electronic safety-related systems

3 Terms and Definitions

The terms and definitions defined in GB/T 20438 (all parts) and GB/T 2900.35-2008 and the following terms and definitions apply to this document. 3.1 failure In any system project, part of the project, any administrative function task or procedure, the non-execution or non-predetermined execution of events, or inoperable state. 3.2 A self-contained system for timely termination of an incipient explosion and/or to limit the extent of impact of the explosion. 3.3 The part of overall safety related to the intended use and integrity of an explosion protection system (including safety-related devices). Note 1.Functional safety depends on the correct implementation of explosion protection systems and other safety-related systems. Note 2.This definition deviates from the definition in GB/T 20438.4-2017, reflecting the difference in explosion safety terminology. Note 3.The functional safety of the explosion protection system is also part of the performance of the explosion protection system. 3.4 The activity of estimating or determining the probability of failure of a safety function of an explosion protection system. ......

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