DIN EN 15233:2007
Methodology for functional safety assessment of protective systems for potentially explosive atmospheres; English version of DIN EN 15233:2007-11

Standard No.

DIN EN 15233:2007

Release Date

2007

Published By

German Institute for Standardization

Status

Be replaced

Replace By

DIN EN 15233:2007-11

Latest

DIN EN 15233:2007-11

Replace

DIN EN 15233:2005

Scope

This European Standard provides guidance on the procedure and information required to allow functional safety assessment to be carried out for the design of protective systems. The purpose of this European Standard is to assist technical standardization committees responsible for specific families of protective systems in preparing safety standards. Such standards should be as homogenous as possible and should have the basic structure of functional safety assessment as it is stated in this standard. If there are no specific standards for a particular protective system, the manufacturer should use this standard for 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 functional safety: 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 an acceptable level. 2) In the event of faults, failures and/or interference~} the capacity to function remains effective by use e.g. of fail safe techniques or redundancy. This European Standard does not cover identification of possible ignition sources. NOTE I 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 caused by malfunctions, e.g. false activations are excluded. This European Standard specifies neither specific methods to analyse fault conditions, nor specific requirements for a given type of protective system (see EN 1127-1). It specifies the methodology of functional safety assessment. This European Standard provides advice for decisions to be made for all types of protective systems referred to in EU Directive 94/9/EC, but does not provide means to prove the conformity of a given type of protective systems. NOTE 2 Equipment is dealt with in EN 15198 owing to the fact that the procedure and information required to allow ignition hazard assessment is different from the procedure above.

DIN EN 15233:2007 Referenced Document

• EN 13237:2003 Potentially explosive atmospheres - Terms and definitions for equipment and protective systems intended for use in potentially explosive atmospheres

DIN EN 15233:2007 history

• 2007 DIN EN 15233:2007-11 Methodology for functional safety assessment of protective systems for potentially explosive atmospheres; German version EN 15233:2007
• 2007 DIN EN 15233:2007 Methodology for functional safety assessment of protective systems for potentially explosive atmospheres; English version of DIN EN 15233:2007-11
• 0000 DIN EN 15233:2005