GB/T 41254-2022Functional safety assessment method of explosive protective system (English PDF)

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.

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.