Session: 04-02-01 Monitoring & Surveillance

Paper Number: 131667

131667 - Methods Selection for Natural Gas Pipeline Patrolling Operation Using Technical and Economic Decision 

Abstract: 

Natural gas is clean energy and the main fuel for generating electricity in Thailand. Additionally, natural gas take account for 114,637 GWh or 53 percentage of total electricity generation. The process of natural gas transportation from production process to power plant is transported through the pipeline system. From statistic, the most occurrences of accidents and incidents of gas pipeline systems in Thailand are caused by third party interference, accounting for 76.32 percentage of all accidents and incidents. For this reason, pipeline patrolling is extremely important to maintain natural gas pipeline integrity for continue transmit natural gas without any serious accidents. Gas pipeline operating companies try to implement addition patrolling measures and technologies to reduce the number of accidents and incidents from third party. The objective of this research is to propose the framework of making the decision on selecting the patrolling method that most suitable for application and reduce risk due to third party interference as low as possible in terms of technical and capital investment criteria of a selected case study. For technical context, multiple criteria decision analysis; the combined Voting Analytic Hierarchy Process (VAHP) and Fuzzy Analytic Hierarchy Process (FAHP) are implemented for determining importance weights of the selected experts and performance weights of each criteria, respectively. Moreover, ranking of the patrolling methods, the Fuzzy Technique of Order Preference Similarity to the Ideal Solution (FTOPSIS) is employed. In the context of capital investment evaluation of the patrolling methods, the equivalence uniform annual worth is used for economic ranking. For the robustness of the ranking, the sensitivity analysis is also conducted on the varying of the importance weights of the technical performance criteria, to evaluate the factors affect the methods used for patrolling as the level of importance changes. In conclusion, from researched based on analysis of technical and capital investment decisions technique, the result reveals that increasing frequency through outsourcing is the most suitable method of natural gas pipeline patrolling.

Presenting Author: Chavalit Tansiriyakul PTT Public Company Limited

Presenting Author Biography: Mr. Chavalit Tansiriyakul
Senior Pipeline Inspection Engineer (Team Leader)
PTT Public Company Limited
Jun 2012 - Present
Chonburi, Thailand
Job Area:
Pipeline Inspection Engineer / Cathodic Protection Engineer / Pipeline Integrity Management
Experience:
Experienced Management of Underground Natural Gas Pipeline Inspection. Skilled in Cathodic Protection Maintenance and Inspections, Corrosion Protection Design, Corrosion Troubleshooting. Specialize in Cathodic Problem Investigation and Training. Background in Pipeline Integrity Management.
Education:
Master of Engineering - MEng, Engineering Management, 2019 – 2021 from Kasetsart University
Bachelor of Engineering - BE, Electrical Engineering, 2005 – 2009 from King Mongkut's Institute of Technology Ladkrabang

Authors:

Chavalit Tansiriyakul PTT Public Company Limited
Patcharaporn Yanpirat Kasetsart University
Sansanee Supapa Kasetsart University
Chatri Yindee PTT Public Company Limited