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Immingham Storage Co Ltd - East Terminal
Gasoline Storage Tanks Overfill Safety Instrument System - Functional Safety Assessment Stage 2/3
P & I Design Ltd
DOCUMENT NO: SI277016_RPT
2 Reed Street, Thornaby, UK, TS17 7AF
ISSUE: D DATE: 25.04.13
Tel: + 44 (0)1642 617444
PAGE 13 OF 33
Fax: + 44 (0)1642 616447
www.pidesign.co.ukThe SRS details the requirements of the SIF from an instrumentation point. Additional
information should be included regarding functional safety. This includes closure times of the
valves and ullage available etc.
The SRS is written for all tanks used for the storage of gasoline
There is reference to common cause failure in the SRS. The system is a 1oo1 and common
cause failure may not be applicable.
The SRS details the fails safe state of the SIF.
The SRS details the individually safe process state of the SIF.
The SRS details the demand and demand rate.
The SRS details the proof test interval
The SRS details the response time to bring the process to a safe state
The SRS details the mode of operation.
No reference to these settings could be identified.
The SRS contains a description of the SIS process measurements and their trip points.