BS EN 15233-2007 潜在易爆环境用保护系统的功能安全性评估用方法学

标准号：BS EN 15233-2007
中文标准名称：潜在易爆环境用保护系统的功能安全性评估用方法学
英文标准名称：Methodology for functional safety assessment of protective systems for potentially explosive atmospheres
标准类型：C67
发布日期：2007/10/31 12:00:00
实施日期：2007/10/31 12:00:00
中国标准分类号：C67
国际标准分类号：13.230
适用范围：This European Standard provides guidance on the procedure and information required to allow functionalsafety assessment to be carried out for the design of protective systems.The purpose of this European Standard is to assist technical standardization committees responsible forspecific families of protective systems in preparing safety standards. Such standards should be ashomogenous as possible and should have the basic structure of functional safety assessment as it is stated inthis standard.If there are no specific standards for a particular protective system, the manufacturer should use this standardfor functional safety assessment of this protective system.In this procedure the following information is to be taken into account to ensure a sufficient level of functionalsafety:a) intended use,b) possible operating faults,c) reliability of protective systems,d) misuse which can reasonably be anticipated.A sufficient level of functional safety is characterized by the following objectives:1) System can stop an explosion at a very early stage or reduce the impact of an explosion to anacceptable level.2) In the event of faults, failures and/or interference1) the capacity to function remains effective by usee.g. of fail safe techniques or redundancy.This European Standard does not cover identification of possible ignition sources.NOTE 1 The identification of possible ignition sources is covered by EN 15198.This European Standard only deals with the functional behaviour of the protective system i.e. hazards causedby malfunctions, e.g. false activations are excluded.This European Standard specifies neither specific methods to analyse fault conditions, nor specificrequirements for a given type of protective system (see EN 1127-1). It specifies the methodology of functionalsafety assessment.This European Standard provides advice for decisions to be made for all types of protective systems referredto in EU Directive 94/9/EC, but does not provide means to prove the conformity of a given type of protectivesystems.NOTE 2 Equipment is dealt with in EN 15198 owing to the fact that the procedure and information required to allowignition hazard assessment is different from the procedure above.