Why HIPPS ??

• We have 600# (high pressure bearing) pipeline from well pads till production header.

• After that, we have 150# (low pressure bearing) pipeline due to economy & usage purpose.

• Due to some abnormality, if high pressure reaches 150# pipeline, then it may cause explosion to pipeline & hence vessels in trains area.

High pressure Bearing Pipeline Low pressure Bearing Pipeline

FLOW

107 psi

Onsite Normal Operation (Without HIPPS):

High pressure Bearing Pipeline Low pressure Bearing Pipeline

FLOW

136 psi

If Pressure IncreasesHigh Pressure

WHAT IS HIPPS???

HIGH INTEGRITY PRESSURE PROTECTION SYSTEM

HIGH INTEGRITY

Using 3 transmitters in downstream (works on 2oo3 logic).

PRESSURE PROTECTION

Safety Integrity Level – 3High pressure from formationBack pressure from trainsPipe rating ( 600# to 150# )

Functional Safety of Electrical/Electronic/Programmable Electronic Safety-related Systems

IEC 61508 and IEC 61511 standards for design, implementation and management of safety systems. SIL (Safety Integrity Level ) - is a measurement of performance required.

SIL 3 In accordance with IEC61508 and IEC61511

Low demand PFD-Frequency of demand of operation is < 1 per year

0.001-0.0001

STANDARD- International Electro Technical Commission (IEC)

1

LOGIC SOLVER

107 PSI

107 PSI

107 PSI

107 PSI

Onsite Normal Operation (With HIPPS):

LOGIC SOLVER

1136 PSI

136 PSI

136 PSI

136 PSI

If pressure increases:

1

LOGIC SOLVER

136 PSI

136 PSI

136 PSI

136 PSI

LIST OF INSTRUMENTS

LIST OF INSTRUMENTS

TRANSMITTERS

PSIT-2011 & 2021 for UpstreamPSIT-2010 A/B/C & 2020 A/B/C for

DownstreamPSIT-201 & 202 for Lube Oil

(All PSIT’s are of ROSEMOUNT and Model of series 3051S)

PSIT-201 & 202

Set Point – 1800 to 2700 psi

Purpose To start/stop the pump

PSIT

SPEIFICATIONS

Type Diaphragm Seal type

Maximum Temperature 80ºC

Minimum Temperature -40ºC

Diaphragm Material Hasteloy C 276

Fill Fluid Material Silicon

Output Signal Type 4-20mA

Digital Communication std HART

Trip SP 135psi

SpecificationsType Ball Valve (Make- Valve

Technologies)Size 30”

Opening time Upto 30 minutes

Closing time Upto 5 seconds

Design Pressure 91.7 bar

Design Temperature 130ºC

Failure Action Fail to close

Hydraulic Oil used ISOVG46

XSV

TRIPS FOR HIPPS VALVES:

1. Downstream pressure of HIPPS: 2oo3 logic.

2. When the pressure of air purge to HIPPS panel falls below 0.15 mm of water column (gauge available in field).

3. Position feedback of the HIPPS valve (any one) not available when valves are in OPEN condition: After a time delay of 40 min, both the HIPPS valves will close.

START-UP CONDITIONS

1. Pressure difference between upstream & downstream PSIT must not exceed 2.5 bar.

2. Upstream pressure should not exceed 100psi.

LOGIC OF 2oo3

BASIC LADDER LOGIC OF 2oo3

HYDRAULIC DIAGRAM

MOTOR

DETAILS

Make Crompton Greaves

Voltage 415v +/- 6%

Type 3ɸ AC Squirrel Cage Induction Motor

Full Load Current 3.25 A

Full Load Speed 1415 RPM

• 1300 PSI PRESSURE IS SUFFICIENT FOR KEEPING THE VALVE IN OPEN POSITION.

• Pump stops at 2700 PSI.

• If the circuit hydraulic pressure is • < 1800 PSI - ONE AMONG THE TWO PUMPS WILL START.

• < 1400 PSI THEN BOTH THE RUNS WILL START AUTOMATICALLY.

CONTINUE:

PLC

AI DI DO

PSIT-2011/2021 Limit switch of XSV XSY 2010 A1-1/2, XSY 2010 B1-1/2, XSY 2010 A1-1/ 2, XSY 2010- B2- 1/2

PSIT-2010 A/B/C (ZSO/ZSC- 2010A/2010B) XSY 2020 A1-1/2, XSY 2020 B1-1/2, XSY 2020 A1-1/ 2, XSY 2020- B2- 1/2

PSIT-2020 A/B/C (ZSO/ZSC-2020A/2020B) Trip lamp, Fault lamp

PSIT-201/202 Trip RESET, Fault RESET

•We have S7 400 PLC for HIPPS package & S7 200 PLC for hydraulic circuit.

•We are using two PLC’s. One for each stream for production redundancy.

PLC I/O’s

Specifications of S7 400 PLC:

1. Modular PLC.2. Handle large module.3. Used where high processing speed & deterministic response time is required.4. Used for data intensive tasks (data parallelism).5. Have additional line monitoring diagnostic feature- generates alarm when wire breaks or short circuit.

Specifications of S7 200 PLC:

1. Shoebox PLC

2. Less Memory.

3. Handle small module

4. Cost effective.

ARCHITECTURE

PLC PURGING SYSTEMDETAILS

Make Pepperl + Fuchs

Model 3003-LPS-C1-YZ-VM

Supply Instrument Air

Overpressure Protection Breather

Range 5.5-8.3 bar

Temp. Range -29 to 50°C

Purpose To remove & prevent flammable gas or vapor accumulation.

Note: Before opening the HIPPS panel, the purge pressure low trip logic should be BYPASSED by making the trip BYPASS switch “ON”. (switch available near HIPPS panel).

Cause & Effect

THANK YOU