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GB/T 20438.5-2017 English PDF (GB/T 20438.5-2006)

GB/T 20438.5-2017_English: PDF (GB/T20438.5-2017)
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GB/T 20438.5-2017English555 Add to Cart 0--9 seconds. Auto-delivery Functional safety of electrical/electronic/programmable electronic safety-related systems -- Part 5: Examples of methods for the determination of safety integrity levels Valid GB/T 20438.5-2017
GB/T 20438.5-2006English839 Add to Cart 4 days [Need to translate] Functional safety of electrical/electronic/programmable electronic safety-related systems -- Part 5: Examples of methods for the determination of safety integrity levels Obsolete GB/T 20438.5-2006


BASIC DATA
Standard ID GB/T 20438.5-2017 (GB/T20438.5-2017)
Description (Translated English) Functional safety of electrical/electronic/programmable electronic safety-related systems -- Part 5: Examples of methods for the determination of safety integrity levels
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard N10
Classification of International Standard 25.040
Word Count Estimation 38,361
Date of Issue 2017-12-29
Date of Implementation 2018-07-01
Drafting Organization Machinery Industry Instrumentation Technology Institute of Economic Research, Beijing Guodian Zhishen Control Technology Co., Ltd., Hangzhou Hollysys Automation Co., Ltd., Beijing Institute of Labor Protection, Wind Control (Beijing) Engineering Technology Co., Ltd., Beijing United Pukun Project Technology Co., Ltd., Shanghai Shanghai Electronics Co., Ltd., Siemens (China) Co., Ltd.
Administrative Organization National Industrial Process Measurement Control and Automation Standardization Technical Committee (SAC/TC 124)
Proposing organization China Machinery Industry Federation
Issuing agency(ies) People's Republic of China General Administration of Quality Supervision, Inspection and Quarantine, China National Standardization Administration

BASIC DATA
Standard ID GB/T 20438.5-2006 (GB/T20438.5-2006)
Description (Translated English) Functional safety of electrical/electronic/programmable electronic safety-related systems. Part 5: Examples of methods for the determination of safety integrity levels
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard N10
Classification of International Standard 25.040
Word Count Estimation 21,269
Date of Issue 2006-07-25
Date of Implementation 2007-01-01
Adopted Standard IEC 61508-5-1998, IDT
Drafting Organization Mechanical Industry Research Institute of Instrumentation Technology
Administrative Organization National Industrial process measurement and control Standardization Technical Committee
Regulation (derived from) China Announcement of Newly Approved National Standards No. 9, 2006 (No. 96 overall)
Proposing organization China Machinery Industry Federation
Issuing agency(ies) Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China
Summary This standard specifies the basic concepts of risk and risk and safety integrity of the relationship between and can determine the electrical, electronic and programmable electronic safety-related systems, other technology safety -related systems and external risk reduction facilities of a Safety Integrity Level series method.


GB/T 20438.5-2017 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 25.040 N 10 GB/T 20438.5-2017 / IEC 61508-5:2010 Replacing GB/T 20438.5-2006 Functional safety of electrical / electronic / programmable electronic safety-related systems - Part 5: Examples of methods for the determination of safety integrity levels (IEC 61508-5:2010, IDT) ISSUED ON: DECEMBER 29, 2017 IMPLEMENTED ON: JULY 01, 2018 Issued by: General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the People's Republic of China. Table of Contents Foreword ... 3  Introduction ... 5  1 Scope ... 8  2 Normative references ... 10  3 Definitions and abbreviations ... 10  Annex A (informative) Risk and safety integrity - General concepts ... 11  Annex B (informative) Selection of methods for determining safety integrity level requirements ... 26  Annex C (informative) ALARP and tolerable risk concepts ... 30  Annex D (informative) Determination of safety integrity levels - A quantitative method ... 34  Annex E (informative) Determination of safety integrity levels - Risk graph methods ... 37  Annex F (informative) Semi-quantitative method using layer of protection analysis (LOPA) ... 45  Annex G (informative) Determination of safety integrity levels - A qualitative method - hazardous event severity matrix ... 52  Bibliography ... 54  Foreword GB/T 20438 "Functional safety of electrical/electronic/programmable electronic safety-related systems" consists of the following seven parts: - Part 1: General requirements; - Part 2: Requirements for electrical/electronic/programmable electronic safety-related systems; - Part 3: Software requirements; - Part 4: Definitions and abbreviations; - Part 5: Examples of methods for the determination of safety integrity levels; - Part 6: Guidelines on the application of GB/T 20438.2 and GB/T 20438.3; - Part 7: Overview of techniques and measures. This Part is Part 5 of GB/T 20438. This Part was drafted in accordance with the rules given in GB/T 1.1-2009. This Part replaces GB/T 20438.5-2006 "Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 5: Examples of methods for the determination of safety integrity levels". Compared with GB/T 20438.5-2006, the main technical changes in this Part are as follows: - add the selection of methods for determining safety integrity level requirements (see Annex B); - add the risk analysis method: semi-quantitative method of protection layer analysis (LOPA) (see Annex F). This Part uses translation method to identically adopt IEC 61508-5:2010 "Functional safety of electrical/electronic/programmable electronic safety- related systems - Part 5: Examples of methods for the determination of safety integrity levels". This Part was proposed by China Machinery Industry Federation. This Part shall be under the jurisdiction of National Technical Committee on National Industrial Process Measurement Control and Automation of Standardization Administration of China (SAC/TC 124). Functional safety of electrical / electronic / programmable electronic safety-related systems - Part 5: Examples of methods for the determination of safety integrity levels 1 Scope 1.1 This Part of GB/T 20438 provides information on - the underlying concepts of risk and the relationship of risk to safety integrity (see Annex A); - a number of methods that will enable the safety integrity levels for the E/E/PE safety related systems to be determined (see Annexes C, D, E, F and G). The method selected will depend upon the application sector and the specific circumstances under consideration. Annexes C, D, E, F and G illustrate quantitative and qualitative approaches and have been simplified in order to illustrate the underlying principles. These annexes have been included to illustrate the general principles of a number of methods but do not provide a definitive account. Those intending to apply the methods indicated in these annexes should consult the source material referenced. NOTE: For more information on the approaches illustrated in Annexes B, and E, see references [5] and [8] in the Bibliography. See also reference [6] in the Bibliography for a description of an additional approach. 1.2 GB/T 20438.1, GB/T 20438.2, GB/T 20438.3 and GB/T 20438.4 are basic safety publications, although this status does not apply in the context of low complexity E/E/PE safety-related systems (see 3.4.3 of GB/T 20438.4-2017). As basic safety publications, they are intended for use by technical committees in the preparation of standards in accordance with the principles contained in IEC Guide 104 and ISO/IEC Guide 51. GB/T 20438.1, GB/T 20438.2, GB/T 20438.3 and GB/T 20438.4 are also intended for use as stand-alone publications. The horizontal safety function of this international standard does not apply to medical equipment in compliance with the IEC 60601 series. 1.3 One of the responsibilities of a technical committee is, wherever applicable, to make use of basic safety publications in the preparation of its publications. In this context, the requirements, test methods or test conditions of this basic ......

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