Interlock Philosophy

Project Name:
Technical Consultancy Services for 20% Ethanol Blending Facilities Project at Reliance
Petro Terminals
Document No.:
Rev.:
0
Page 1 of 5
Project Name:
Technical Consultancy Services for 20% Ethanol Blending Facilities
Project at Reliance Petro Terminals
Client:
Location:
Bhopal
Document No.:
INTERLOCK PHILOSOPHY
0
23-06-2022
Review and Approval
Rev.
Date
Description
Prepared
Reviewed
Approved
Client Review

Project Name:
Technical Consultancy Services for 20% Ethanol Blending Facilities Project at Reliance
Petro Terminals
Document No.:
Rev.:
0
Page 2 of 5
INTERLOCKS DESCRIPTIONS
A Tank shall be in one of the following Mode at one point of time.
TANK MODES
1. Dormant
2. Dispatch
3. Receipt / Recirculation
1. Dormant:
Tank is not operational. Status of Tank automated valves and Interlocks are specified in Table-01 and Table-2
respectively.
2. Dispatch:
Ethanol Storage Tank is being dispatched the product through Tank outlet MOV and ROSOV. Status of Tank
automated valves and Interlocks are specified in Table-01 and Table-2 respectively.
3. Receipt/Recirculation:
Case-I: Product is getting received in Ethanol Storage Tank only from Truck Tankers.
Case-II: Product is getting received in Ethanol Storage Tank from Truck Tankers as well as from recirculation line
Tank inlet MOV.
Case-III: Product is getting received in Ethanol Storage Tank only through recirculation line.
Status of Tank automated valves and Interlocks are specified in Table-01 and Table-2 respectively.
TABLE- 01: TANK MODE VS STATUS OF AUTOMATED VALVES OF TANKS
Tank Mode
Status of Automated valves of Tanks
Tank
inlet
MOV
Tank inlet
ROSOV
Tank
Recirculation
Line MOV
Tank
Outlet
MOV
Tank
Outlet
ROSOV
Dormant Mode
C
C
C
C
C
Receipt/Recirculation
Mode
Case-I
O
O
C
C
C
Case-II
O
O
O
C
C
Case-III
O
O
O
C
C
Dispatch Mode
C
C
C
O
O
Legend: C- Close; O-Open

Project Name:
Technical Consultancy Services for 20% Ethanol Blending Facilities Project at Reliance
Petro Terminals
Document No.:
Rev.:
0
Page 3 of 5
TABLE-2: INTERLOCK DESCRIPTIONS
INTERLOCK
NO.
INTERLOCK DESCRIPTION
IZ 001
ESD ACTUATION
ALL PUMPS / ROSOV'S / MOV'S/ BATCH
CONTROLLER SHALL CLOSE/BARRIER
GATE TO OPEN ON ACTUATION OF ESD.
I-001
EARTHING PERMISSIVE
EARTHING TRIP INTERLOCK
FOR START OF UNLOADING PUMP;
FOR STOP OF PUMP DURING RUNNING
CONDITION.
I005B
I005C
AT RADAR GAUGE-1 OF TANK (MPL801-MT-J37-T501A)
HIGH HIGH ALARM
OR
AT RADAR GAUGE-2 OF TANK (MPL801-MT-J37-T501A)
HIGH HIGH ALARM
TANK (MPL801-MT-J37-T501A) INLET
MOV-J37-007A CLOSE
I006B
I006C
AT RADAR GAUGE-1 OF TANK (MPL801-MT-J37-T501A)
HIGH HIGH ALARM
OR
AT RADAR GAUGE-2 OF TANK (MPL801-MT-J37-T501B)
HIGH HIGH ALARM
TANK (MPL801-MT-J37-T501B) INLET
MOV-J37-007B CLOSE
I003A
I003B
I003C
AT LS-J37-12 OF TANK (MPL801-MT-J37-T501A) HIGH
HIGH HIGH ALARM
OR
AT RADAR GAUGE-1 OF TANK (MPL801-MT-J37-T501A)
HIGH HIGH HIGH ALARM
OR
AT RADAR GAUGE-2 OF TANK (MPL801-MT-J37-T501A)
HIGH HIGH HIGH ALARM
TANK (MPL801-MT-J37-T501A) INLET
ROSOV-J37-011 CLOSE
I004A
I004B
AT RADAR GAUGE-1 OF TANK (MPL801-MT-J37-T501A)
HIGH HIGH HIGH ALARM
OR
AT RADAR GAUGE-2 OF TANK (MPL801-MT-J37-T501B)
HIGH HIGH HIGH ALARM
TANK (MPL801-MT-J37-T501B) INLET
ROSOV-J37-020 OF CLOSE

Project Name:
Technical Consultancy Services for 20% Ethanol Blending Facilities Project at Reliance
Petro Terminals
Document No.:
Rev.:
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Page 4 of 5
I015B
I015C
AT RADAR GAUGE-1 OF TANK (MPL801-MT-J37-T501A)
HIGH HIGH ALARM
OR
AT RADAR GAUGE-2 OF TANK (MPL801-MT-J37-T501A)
HIGH HIGH ALARM
BOTH UNLOADING PUMPS MPL801-MP-
J37-P601A/MPL801-MP-J37-P601B TRIP
I016B
I016C
AT RADAR GAUGE-1 OF TANK (MPL801-MT-J37-T501A)
HIGH HIGH ALARM
OR
AT RADAR GAUGE-2 OF TANK (MPL801-MT-J37-T501B)
HIGH HIGH ALARM
BOTH UNLOADING PUMPS MPL801-MP-
J37-P601A/MPL801-MP-J37-P601B TRIP
I002A
I002B
TANK (MPL801-MT-J37-T501A) INLET MOV IS CLOSE
OR
TANK (MPL801-MT-J37-T501B) INLET MOV IS CLOSE
BOTH UNLOADING PUMPS MPL801-MP-
J37-P601A/MPL801-MP-J37-P601B TRIP
I005B
I005C
AT RADAR GAUGE-1 OF TANK (MPL801-MT-J37-T501A)
HIGH HIGH ALARM
OR
AT RADAR GAUGE-2 OF TANK (MPL801-MT-J37-T501A)
HIGH HIGH ALARM
TANK RECIRCULATION MOV-J37-008
CLOSE
I006B
I006C
AT RADAR GAUGE-1 OF TANK (MPL801-MT-J37-T501A)
HIGH HIGH ALARM
OR
AT RADAR GAUGE-2 OF TANK (MPL801-MT-J37-T501A)
HIGH HIGH ALARM
TANK RECIRCULATION MOV-J37-008
CLOSE
I007A
I007B
AT RADAR GAUGE-1 OF TANK (MPL801-MT-J37-T501A)
LOW LOW ALARM
OR
AT RADAR GAUGE-2 OF TANK (MPL801-MT-J37-T501A)
LOW LOW ALARM
TANK (MPL801-MT-J37-T501A) OUTLET
MOV-J37-019 CLOSE
I008A
I008B
AT RADAR GAUGE-1 OF TANK (MPL801-MT-J37-T501B)
LOW LOW ALARM
OR
AT RADAR GAUGE-2 OF TANK (MPL801-MT-J37-T501B)
LOW LOW ALARM
TANK (MPL801-MT-J37-T501B) OUTLET
MOV-J37-028 CLOSE

Project Name:
Technical Consultancy Services for 20% Ethanol Blending Facilities Project at Reliance
Petro Terminals
Document No.:
Rev.:
0
Page 5 of 5
I009A
I009B
AT RADAR GAUGE-1 OF TANK (MPL801-MT-J37-T501A)
LOW LOW LOW ALARM
OR
AT RADAR GAUGE-2 OF TANK (MPL801-MT-J37-T501A)
LOW LOW LOW ALARM
TANK (MPL801-MT-J37-T501A) OUTLET
ROSOV-J37-018 CLOSE
I010A
I010B
AT RADAR GAUGE-1 OF TANK (MPL801-MT-J37-T501B)
LOW LOW LOW ALARM
OR
AT RADAR GAUGE-2 OF TANK (MPL801-MT-J37-T501B)
LOW LOW LOW ALARM
TANK (MPL801-MT-J37-T501B) OUTLET
ROSOV-J37-027 CLOSE
I011A
I011B
I011C
TANK (MPL801-MT-J37-T501A) OUTLET MOV IS CLOSE
ALL THREE BLENDING PUMPS MPL801-
MP-J37-P501A/MPL801-MP-J37-P501B/
MPL801-MP-J37-P501C TRIP
I012A
I012B
I012C
TANK (MPL801-MT-J37-T501B) OUTLET MOV IS CLOSE
ALL THREE BLENDING PUMPS MPL801-
MP-J37-P501A/MPL801-MP-J37-P501B/
MPL801-MP-J37-P501C TRIP
I017A
I017B
AT RADAR GAUGE-1 OF TANK (MPL801-MT-J37-T501A)
LOW LOW ALARM
OR
AT RADAR GAUGE-2 OF TANK (MPL801-MT-J37-T501A)
LOW LOW ALARM
ALL THREE BLENDING PUMPS MPL801-
MP-J37-P501A/MPL801-MP-J37-P501B/
MPL801-MP-J37-P501C TRIP
I018A
I018B
AT RADAR GAUGE-1 OF TANK (MPL801-MT-J37-T501B)
LOW LOW ALARM
OR
AT RADAR GAUGE-2 OF TANK (MPL801-MT-J37-T501B)
LOW LOW ALARM
ALL THREE BLENDING PUMPS MPL801-
MP-J37-P501A/MPL801-MP-J37-P501B/
MPL801-MP-J37-P501C TRIP
I013
AT HIGH PREESURE OF DISCHARGE HEADER OF
BLENDING PUMP
ALL THREE BLENDING PUMPS MPL801-
MP-J37-P501A/MPL801-MP-J37-P501B/
MPL801-MP-J37-P501C TRIP
I014
OVERFILL FROM LOADING TRUCK TANKER
XV-043 VALVE IN THE UPSTREAM OF
STRAINER-CUM-AIR ELIMINATOR SHALL
CLOSED BY BCU (FOR BOTTOM LOADING
OPERATION)