SI057001_MNL - Gasoline Overfill Protection SIS IMMEAS-SIS1 Design Manual

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Immingham Storage Co Ltd – Immingham East Terminal
IME-SIS1 - Safety Instrument System Safety Requirement Specification
P & I Design Ltd DOCUMENT NO: SI277010_RPT
2 Reed Street, Thornaby, UK, TS17 7AF ISSUE: G DATE: 31.10.14
Tel: + 44 (0)1642 617444 PAGE 10 OF 13
Fax: + 44 (0)1642 616447
4.0 Functional Requirements
4.1 No. 4 East Tanks
4.1.1 SIS Inputs
1. Tank Level Switch Elements
a. LE56101 - Tank 561 High High Level Switch
b. LE56401 - Tank 564 High High Level Switch
c. LE56801 - Tank 568 High High Level Switch
2. Valve closed position – Diagnostic feedback and reset permissive.
a. ZSC56101 - Tank 561 XV56101 Import/Export Valve Closed Limit
b. ZSC56401 - Tank 564 XV56401 Import/Export Valve Closed Limit
c. ZSC56801 - Tank 568 XV56801 Import/Export Valve Closed Limit
3. Valve open position – Diagnostic feedback.
a. ZSC56101 - Tank 561 XV56101 Import/Export Valve Closed Limit
b. ZSC56401 - Tank 564 XV56401 Import/Export Valve Closed Limit
c. ZSC56801 - Tank 568 XV56801 Import/Export Valve Closed Limit
4. Manual Shutdown Inputs
a. Site ESD
b. Tank 561
c. Tank 564
d. Tank 568
5. Manual Reset Pushbutton/Remote Input
a. Common reset relays operated by a panel pushbutton or remote input
4.1.2 SIS Logic Solvers
a) Safety Relay with feedback verification before reset.
a. Tank 561 Safety Relay
b. Tank 564 Safety Relay
c. Tank 568 Safety Relay
4.1.3 SIS Outputs
1. Solenoid valves
a. SOV56101 - Tank 561 XV56101 Import/Export Solenoid Valve
b. SOV56401 - Tank 564 XV56401 Import/Export Solenoid Valve
c. SOV56801 - Tank 568 XV56801 Import/Export Solenoid Valve
2. Ball valve with air fail closed, spring return actuator
a. XV56101 - Tank 561 Import/Export Valve
b. XV56401 - Tank 564 Import/Export Valve
c. XV56801 - Tank 568 Import/Export Valve