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Local Fuel PLC – The Shoreham Oil Terminal
Safety Instrument System Overfill Shutdown Conditions Proof Testing Procedure LFS-SIS1
P & I Design Ltd
DOCUMENT NO: LF364012_RPT
2 Reed Street, Thornaby, UK, TS17 7AF
ISSUE: A DATE: 20.05.15
Tel: + 44 (0)1642 617444
PAGE 3 OF 22
Fax: + 44 (0)1642 616447
www.pidesign.co.uk1
REVISION HISTORY
Rev Description
A
Original Issue
This document will be revised with any additions to or removals from LFS-SIS1 throughout
the operational lifecycle of the system.
2
INTRODUCTION
This document provides a procedure for shutdown condition functional proof testing to
ensure that the Safety Instrument System Life Cycle complies with the requirements of the
standard BS EN 61511.
BS EN 61511-1:2004 Clause 3.2.58 - Proof testing is a test performed to reveal undetected
faults in a safety instrumented system (SIS) so that, if necessary, the SIS can be restored to
its designed functionality.
By revealing all undetected faults, the PFD is effectively ‘reset’ back to the designed value.