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Safety Instrument System
Tank Overfill Protection - Management of Functional Safety
P & I Design Ltd
DOCUMENT NO: SI277102_RPT
2 Reed Street, Thornaby, UK, TS17 7AF
ISSUE: B DATE:10.10.12
Tel: + 44 (0)1642 617444
PAGE 21 OF 22
Fax: + 44 (0)1642 616447
www.pidesign.co.uk17.0 DECOMMISSIONING
Management Procedures must include for the decommissioning of the Safety Instrument
System. These should follow the Management of Change Procedure but should also include
that, on decommissioning of the system have the following been considered:
Functional safety during decommissioning
The impact on systems interfacing with the SIS
Has a decommissioning plan been implemented and approved
Following any modification the following should be documented:
Has all documentation affected by the modification been revised
Has the modification been fully proof tested
Has a detailed modification sheet been completed
Roles and Responsibilities
:
Immingham Storage Ltd:
Assign competent persons to be responsible for the implementation and approval of a
decommissioning plan.
Following decommissioning, assign competent person(s) to be responsible for ensuring that
all documentation has been archived
Personnel assigned to this phase to be detailed at the time of de-commissioning.