SI057001_MNL - Gasoline Overfill Protection SIS IMMEAS-SIS1 Design Manual

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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: F DATE: 31.10.14
Tel: + 44 (0)1642 617444 PAGE 11 OF 29
Fax: + 44 (0)1642 616447
6.4 Functional Requirements - No. 4 East Tanks (Fixed Roof)
6.4.1 SIS Inputs
1. Tank Level Switch Elements
a. LE561 Tank 561 High High Level Switch
b. LE564 Tank 564 High High Level Switch
c. LE568 Tank 568 High High Level Switch
2. Valve closed position – Permissive only for feedback purposes.
a. ZSC56101 Tank 561 Import/Export Valve
b. ZSC56401 Tank 564 Import/Export Valve
c. ZSC56801 Tank 568 Import/Export Valve
3. Manual Reset Pushbutton/Remote Input
Common reset relays operated by a panel pushbutton or remote input
6.4.2 SIS Logic Solvers
a) Safety Relay with feedback verification before reset.
a. R250 :- Reference Drawing SI483009_DWG
b. R330 :- Reference Drawing SI483010_DWG
c. R410 :- Reference Drawing SI483011_DWG
6.4.3 SIS Outputs
1. Solenoid valves
a. SOV56101 Tank 561 Import/Export Solenoid Valve
b. SOV56401 Tank 564 Import/Export Solenoid Valve
c. SOV56801 Tank 568 Import/Export Solenoid Valve
2. Ball valve with closed air fail, spring return actuator
a. XV56101 Tank 561 Import/Export Valve
b. XV56401 Tank 564 Import/Export Valve
c. XV56801 Tank 568 Import/Export Valve