SI057001_MNL - Gasoline Overfill Protection SIS IMMEAS-SIS1 Design Manual

Immingham East Terminal – Gasoline Overfill Protection

Safety Instrument System

P & I Design Ltd

DOCUMENT NO: SI277001_RPT

2 Reed Street, Thornaby, UK, TS17 7AF

ISSUE:

DATE: 31.10.14

Tel: + 44 (0)1642 617444

PAGE 7 OF 29

Fax: + 44 (0)1642 616447

SPECIFICATION OF SAFETY INSTRUMENT SYSTEM

6.1

Safety Instrumented Function

The Safety Instrument Functions are to prevent overfill of the storage tanks. See Safety

Requirement Specification SI227010_RPT.

The fixed roof tanks (No. 4 East) will have actuated import or import/export valves which

will automatically close on the activation of the high level switch for that particular tank. The

following valves are included in the design:

XV56101

Tank 561 Import/Export Valve

XV56401

Tank 564 Import/Export Valve

XV56801

Tank 568 Import/Export Valve

The No. 4 East tanks are designated as 561, 564 & 568.

All tank-side actuated valves will also close on activation of the 4 East Crash Stop, on

activation of that tank’s high high level switch or on activation of an individual tank isolation

pushbutton for any of the above tanks, installed outside the bunds.