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Tank Overfill Safety Instrument System
CompEx Rectification - Modification Sheet
P & I Design Ltd
DOCUMENT NO: PX232003_RPT
2 Reed Street, Thornaby, UK, TS17 7AF
ISSUE: A DATE: 08.03.13
Tel: + 44 (0)1642 617444
PAGE 3 OF 5
Fax: + 44 (0)1642 616447
www.pidesign.co.uk1
REVISION HISTORY
Rev Description
A
Original Issue – Modification requested, assessed and initiated
B
C
D
2
SCOPE
This document has been prepared to control a modification to the Phillips 66, Bramhall
Terminal, Tank Overfill Safety Instrument System.
The modification is necessary due to a failure of a JB1, LEHHH03 and LEHHH04 during
CompEx inspection.
The purpose of this report is to ensure that the proposed modifications are planned,
reviewed and approved prior to implementation. Also to highlight the necessary changes to
all documentation.
A stage 5 Functional Safety Assessment would normally be initiated at this stage. However
as the replacement is a like for like replacement of a certified component, no stage 5 FSA is
considered necessary.
3
MODIFICATION PLAN
3.1
Description of the modification or change
LEHHH03 and LEHHH04 replaced with identical units.
JB3 to be added to installation.
3.2
Reason for the modification or change
LEHHH03 and LEHHH04 water ingress in original units due to cracked housings.
Water Ingress found in JB1, JB3 to be added to installation to relieve tension on JB1 cables
(suspected water ingress route).