SI057002_MNL - Gasoline Overfill Protection SIS IMMEAS-SIS1 Management Manual

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 19 OF 22

Fax: + 44 (0)1642 616447

15.0 MODIFICATION

Management Procedures must include for any modifications of the Safety Instrument System.

These should follow the Management of Change Procedure but should also include, that

following the requirement for a modification of the SIS the following have been considered

and implemented:



Description of the modification



Reason for the modification



Identified hazards which may be affected



Analysis of the impact of the modification



Approval for the modification

Following any modification the following should be documented:



Have all documentation affected by the modification been revised



Have 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 any modification to the Safety Instrument

System.

Personnel assigned to this phase to be detailed on competition of stage 4 Review.

A FSA meeting Stage 5 should be held to confirm that any modifications does not impede on

the safe operation of the SIS and that the original intent is maintained.