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GB/T 20438.1-2017 PDF in English


GB/T 20438.1-2017 (GB/T20438.1-2017, GBT 20438.1-2017, GBT20438.1-2017)
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GB/T 20438.1-2017: PDF in English (GBT 20438.1-2017)

GB/T 20438.1-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 25.040
N 10
GB/T 20438.1-2017 / IEC 61508-1:2010
Replacing GB/T 20438.1-2006
Functional safety of electrical / electronic /
programmable electronic safety-related systems - Part
1: General requirements
(IEC 61508-1:2010, 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 ... 4 
INTRODUCTION ... 6 
1 Scope ... 9 
2 Normative references ... 12 
3 Definitions and abbreviations ... 13 
4 Conformance to GB/T 20438 ... 13 
5 Documentation ... 14 
5.1 Objectives ... 14 
5.2 Requirements ... 14 
6 Management of functional safety ... 16 
6.1 Objectives ... 16 
6.2 Requirements ... 16 
7 Overall safety lifecycle requirements ... 21 
7.1 General ... 21 
7.2 Concept ... 31 
7.3 Overall scope definition ... 31 
7.4 Hazard and risk analysis ... 32 
7.5 Overall safety requirements ... 35 
7.6 Overall safety requirements allocation ... 38 
7.7 Overall operation and maintenance planning ... 46 
7.8 Overall safety validation planning ... 49 
7.9 Overall installation and commissioning planning ... 50 
7.10 E/E/PE system safety requirements specification ... 52 
7.11 E/E/PE safety-related systems - realisation ... 55 
7.12 Other risk reduction measures - specification and realisation ... 56 
7.13 Overall installation and commissioning ... 56 
7.14 Overall safety validation ... 57 
7.15 Overall operation, maintenance and repair ... 58 
7.16 Overall modification and retrofit ... 62 
7.17 Decommissioning or disposal ... 65 
7.18 Verification ... 67 
8 Functional safety assessment ... 68 
8.1 Objective ... 68 
8.2 Requirements ... 68 
Annex A (Informative) Example of a documentation structure ... 74 
Bibliography ... 80 
FOREWORD
GB/T 20438 "Functional safety of electrical/electronic/programmable electronic
safety-related systems” is divided into 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 1 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 20438.1-2006 "Functional safety of
electrical/electronic/programmable electronic safety-related systems - Part 1:
General requirements". Compared with GB/T 20438.1-2006, the major
technical changes are as follows:
-- Add the requirements for the competence of persons in management of
functional safety (see Clause 6);
-- Add the E/E/PE system safety requirements specification phase in the
overall safety lifecycle (see 7.10);
-- Modify the evaluation method for evaluating independence (see Clause 8).
This Part uses the translation method to equivalently adopt IEC 61508-1:2010
"Functional safety of electrical/electronic/programmable electronic safety-
related systems - Part 1: General requirements".
This Part was proposed by China Mechinery Industry Federation.
This Standard shall be under the jurisdiction of National Technical Committee
124 on Industrial Process Measurement and Control of Standardization
Administration of China (SAC/TC 124).
Functional safety of
electrical/electronic/programmable electronic safety-
related systems - Part 1: General requirements
1 Scope
1.1 GB/T 20438 covers those aspects to be considered when
electrical/electronic/programmable electronic (E/E/PE) systems are used to
carry out safety functions. A major objective of GB/T 20438 is to facilitate the
development of product and application sector national standards by the
technical committees responsible for the product or application sector. This will
allow all the relevant factors, associated with the product or application, to be
fully taken into account and thereby meet the specific needs of users of the
product and the application sector. A second objective of GB/T 20438 is to
enable the development of E/E/PE safety-related systems where product or
application sector national standards do not exist.
1.2 In particular, GB/T 20438
a) applies to safety-related systems when one or more of such systems
incorporates electrical/electronic/programmable electronic elements;
NOTE 1: In the context of low complexity E/E/PE safety-related systems,
certain requirements specified in GB/T 20438 may be unnecessary,
and exemption from compliance with such requirements is possible
(see 4.2, and the definition of a low complexity E/E/PE safety-related
system in 3.4.3 of GB/T 20438.4-2017).
NOTE 2: Although a person can form part of a safety-related system (see 3.4.1
of GB/T 20438.4-2017), human factor requirements related to the
design of E/E/PE safety-related systems are not considered in detail
in GB/T 20438.
b) is generically-based and applicable to all E/E/PE safety-related systems
irrespective of the application;
c) covers the achievement of a tolerable risk through the application of
E/E/PE safety-related systems, but does not cover hazards arising from
the E/E/PE equipment itself (for example electric shock);
d) applies to all types of E/E/PE safety-related systems, including protection
systems and control systems;
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.