1. Risk Based inspection in pipelines PSC 2018 08th March 2018BY
Rangarajan seshadri
sr. general manager
Reliance gas transportation infrastructure limited
mumbai

2. DISCLAIMER
Any statement, opinion, prediction, comment, or observation made in this presentation/publication are those of the presenter/author only and in no condition should be construed necessarily representing the policy and intent of Reliance Gas Transportation Infrastructure Ltd. (RGTIL).
The information presented herein are of the presenter/author’s own  and in no way RGTIL attracts any liability for any inconsistency or irregularity in terms of the accuracy completeness, veracity, or truth of the content of the presentation/publication. In addition, RGTIL shall not be liable for any copyright infringement and misrepresentation for the presented content as the content is presumed in good faith to be a creation of presenter’s/author’s own mind.
The scope of this presentation/publication is strictly for knowledge sharing purposes and not necessarily to provide any advice or recommendation to the audience/readers. Any endorsement, recommendation, suggestion, or advice made by the presenter/author shall be in his personal capacity and not in professional capacity as an employee of RGTIL. Any person acting on such endorsement, recommendation, suggestion, or advice will himself/herself be responsible for any injury/damage.

3. Contents RBI Concept What is Risk Pipeline Risk Assessment
Recommended Control measures

4. Introduction
Why RBI?
Prioritise Inspection based on the Assessment of Risk
RBI Applications
Oil and Gas Industry
Topside Processes
Onshore Terminals
Pipeline Networks
Nuclear and Aviation Applications
Benefits of RBI
Optimise Inspection
Ensure Safe Operation
Provide an Audit Trail

5. RBI Concept

6. What is Risk? What do you understand when you hear the word “RISK”
Risk is too high
Not sure I am willing to take risk
Risk must be eliminated or reduced
Risk must be assessed and managed
We all take “RISK” at some point in our lives
Health Risk
Travel risk
Financial risk

7. What would you take?

8. How do you estimate Risk?

9. Risk Overview

10. Pipeline Risk Assessment
Threat Based
Job specific

11. Pipeline Risk Assessment
Identification of Risk – Risk Description & causes
Risk Assessment on worst credible basis
Listing down the control measures/Risk Response
Risk Assessment with control measures in place
Listing down proposed/future control measures
Risk Assessment after implementation of proposed measures

12. Risk Identification Third Party damage External Corrosion
Internal Corrosion
Stress Corrosion
Weather & external forces
Stray current interference
Equipment – Gaskets/seals/ valves
Manufacturing & constructional defects
Incorrect operation
Based on 9th EGIG report, Feb 2015

13. Probability of failure

14. Recommended Control Measures / Monitoring Practises
Third Party Damage
Line walk – Daily for liquid pipelines, Twice in a year for gas pipelines
Road Patrolling of HCA - Fortnightly
Aerial patrolling - Monthly
ROU Walk by Company officials – Once in a year
Population Density Survey - Once in 5 years
PIDS (Pipeline Intrusion and detection system) – Online
Public Awareness Program - Monthly

15. Recommended Control Measures / Monitoring Practises
External Corrosion
CP PSP Monitoring in field – Monthly
Bell Hole Inspection / ECDA - Once in 5 years
CIPL/DCVG Survey – Once in 5 years
AC / DC Interference Survey – Once in 3 years
Intelligent Pigging – Once in 10 years
Collection and testing of soil samples in chemical discharge areas – Yearly
Maintenance of rectifier units - Monthly

16. Recommended Control Measures / Monitoring Practises
Internal Corrosion
Cleaning pigging – Once in 5 years for gas pipelines, Crude Oil Pipelines – once in three months, Two phase / multiphase flow – once in a year
Intelligent Pigging – Once in 10 years
H2O, CO2, O2,H2S Content – Monthly
Moisture, Hydrocarbon Dew Point - Daily

17. Recommended Control Measures / Monitoring Practises
Natural Forces
River bank Inspection – Quarterly
Bathymetry Survey for perennial rivers - Once in five years
GPS Mapping of river banks –Once in a year

18. Precast slabs installation in class change locations

19. Loose Rubble Dumping

20. Sheet Piling for river bank protection

21. GPS mapping of river banks

22. PIMS Software

23. PIMS Software …contd
Corrosion growth rate and corresponding pipe wall thickness