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CDOIF
Chemical and Downstream Oil
Industries Forum
CDOIF is a collaborative venture formed to agree strategic areas for
joint industry / trade union / regulator action aimed at delivering
health, safety and environmental improvements with cross-sector
benefits.
Guideline – Demonstrating Prior Use v4
Page 9 of 30
3.
PRIOR USE - DEFINITION
Prior Use is a term defined in BS EN 61511-1 relating to the selection of components or
subsystems. For the claim to be made that the selection of components and subsystems
has been made on the basis of prior use, there needs to be appropriate evidence
available that the components and subsystems are suitable for use in the safety
instrumented system under consideration.
The standard requires that the evidence of suitability is based on the following four
aspects:
•
Consideration of the manufacturer’s quality, management and configuration
management systems;
•
Adequate identification and specification of the components or subsystems;
•
Demonstration of the performance of the components or subsystems in similar
operating profiles and physical environments;
•
The volume of the operating experience.