Pipeline Inspection & Repair - Indonesian Gas...

PT TRANSPORTASI GAS INDONESIA

Pipeline Inspection & Repair

“Indopipe 2014”

By ;Oddy J. Rinaldi

Jogyakarta, 17th June 2014

Table of Contents

1. Objectives

2. TGI Gas Pipeline System

3. TGI Assets3. TGI Assets

4. Onshore & Offshore Pipeline SystemInspection

5. Onshore & Offshore Pipeline Repair

6. Way Foward

1. Objectives

• To highlights inspection & repair on onshore and offshore pipeline system.

• To sharing knowlegde and experience of inspection & • To sharing knowlegde and experience of inspection & repair in TGI pipeline system.

2. TGI Gas Pipeline System

Main features of the system:

• Grissik Duri pipeline 536 km, 28 inch, onshore, 427 MMSCFD, built in 1998.

• Grissik Singapore pipeline 468 km, 28 inch, 226 km 468 km, 28 inch, 226 km onshore, 242 km offshore, 350 MMSCFD, built in 2003.

• 2 Compressors station 3x 4.5 MW built in 2003.

• 1 Compressor station 2x 7MW built in 2007

2.1. TGI Operation Offices

Regional Office :

• Regional Office 1- Jambi

Regional Offices are located along the pipeline for better response time and closer community relations.

• Regional Office 1- Jambi

• Regional Office 2 - Belilas

• Regional Office 3 -Pekanbaru

• Regional Office 4- Batam

• Gas Management - Jambi

Right of Way (ROW)

3. TGI Assets

Station

25 m

9 m

> 1.0 m

Gas Pipeline

3.1. TGI Assets

Compressor Station Metering Station

4. Pipeline Inspection

Onshore :

1. ROW Surveillance

2. Pipe to Soil Monitoring

3. CIPS & DCVG3. CIPS & DCVG

4. Pigging

Offshore :

5. Site Scan Sonar, Multibeam & Echo Sounder Survey

6. ROV

7. Diver

4.1.1. ROW Surveillance

Aerial surveillance :

• To survey a general conditionof ROW for detecting exposedof ROW for detecting exposedpipe, slope failure, flooding,3rd party intrusion and newdevelopment around ROW(Class Location Change).

Aerial Surveillance

4.1.3. ROW Surveillance

Ground surveillance :

• To confirm the result of Aerial surveillance to get

Ground Surveillance

Aerial surveillance to get the detail data.

• Performed promptly if needed based on risk ranking.

4.1.2. ROW Surveillance

Soil Erosion Class Location Change 3rd Party Intrution

Exposed Pipe Fire Forest

4.2.1. Pipe to Soil Monitoring

Pipe to soil potential survey :

• To get potential value for protection the pipe. for protection the pipe.

CP Survey

4.3 CIPS & DCVG Survey

CIPS & DCVG Survey :

• To get the actual data for pipe to soil

potential and current condition.

• To identify work needed to improve

Setting DGPS

Electrode Reference CuSO4

• To identify work needed to improve

the potential and CP system

• To perform further analysis and

rectification for the integrity of the

pipeline coating

4.4.1. Pigging

Cleaning Pigging :

• To remove debris, wax, and liquid inside the pipeline.

• This activity is performed annually

4.4.2. Magnetic Flux Leakage (MFL) & High Resolution Caliper Pig

Magnetic Flux Leakage (MFL) Pigging :

• To detect and measure corrosion defect and other defect inside the pipeline.pipeline.

High Resolution Caliper pig :

• To detect and measure dent, ovality, and other defect inside the pipeline.

• Brief on damaged section between KP110.5 to KP133.5 as per bellow:

– Based on the Deformation

4.4.3. Magnetic Flux Leakage (MFL) & High Resolution Caliper Pig

– Based on the Deformation pigging tool, found total of 18 buckles along the damaged section

– Maximum deformation of buckle ±7.59% of OD

– Water depth at damaged section ±35m

4.4. SSS, Multibeam and Sub Bottom Profiler

SSS, Multibeam & Sub bottom profiler :

• To inspect the seabed condition (free span, debris, soil condition, etc) along the pipeline to ensure the integrity

4.5. Remote Operating Vehicle (ROV)

ROV :

• To inspect the potensial of Chatodic Protection in offshore pipeline, and condition of anode.

Soil ErosionSoil Erosion

4.6. Diver

• For visual inspection the under water pipeline.

5. Pipeline Repair

Onshore & Offshore Pipeline Repair Based on

inspection result :

1. Free span repair with grouth bag

2. Pipeline repair with composite2. Pipeline repair with composite

3. Pipeline repair with clamp

4. Pipelie repair with sleave

5. Cut and Replace with zero down time

5.1 Free span rectification work

• Free span rectification work performed : February 2012

5.2 Pipeline Repair With Composite

• External Metal lost repair at KP 455: March 2009

5.3 Pipeline Repair With Pipe Clamp

• Welding Crack repair at KP 47: November 2011

5.4 Pipeline Repair With Pipe Sleave

• Internal Metal lost repair at KP 495: Sept 2012

FLOW

FLOWFLOW

• The repair philosophy was to avoid or minimize the interruption of gas supply to customer, therefore TGI had to develop a repair method which can achieve the goals

• There was two method developed during the FEED, the method are:

� Reduce Downtime Method (conventional)

5.1 Pipeline Repair With Cut and Replace

� Reduce Downtime Method (conventional)

� Zero Downtime Method

• Based on the comparison (technical and cost) and risk associated with the method, also to avoid gas interruption, therefore TGI decide to proceed with “Zero down time method”

Typical Layout of cut and replace wit zero down time method16” by pass line 16” by pass line

5.1 Pipeline Repair With Cut and Replace

Note : not to scale

KP 110 KP 133

23 km damage pipeline

5.1 Pipeline Repair With Cut and Replace

� Offshore Pipeline Repair � Onshore Pipeline Repair

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Improvement

Year 2003 - 2011

O&M based on schedule

O&M refer to Work Procedure / Work Instruction

Year 2012 - now

O&M based on Risk Base Inspection (RBI)

Pipeline O&M refer to Pipeline Integrity Management System (PIMS) which detailed in the

7. Way Foward

(PIMS) which detailed in the Work Procedure / Work Instruction

Development of Facility Integrity Management System (FIMS) in year 2013

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THE END