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Research Papers: Materials Technology

On the Burst Strength Capacity of an Aging Subsea Gas Pipeline

[+] Author and Article Information
Mohd Hairil Bin Mohd

Maritime Technology Department,
Universiti Malaysia Terengganu,
Kuala Terengganu 21030, Terengganu, Malaysia;
Lloyd's Register Foundation
Research Centre of Excellence,
The Korea Ship and Offshore Research Institute,
Pusan National University,
Busan 609-735, South Korea
e-mail: m.hairil@pusan.ac.kr

Dong Woo Kim

Lloyd's Register Foundation
Research Centre of Excellence,
The Korea Ship and Offshore Research Institute,
Pusan National University,
Busan 609-735, South Korea
e-mail: dw1009@dsme.co.kr

Byeong Joon Lee

Lloyd's Register Foundation
Research Centre of Excellence,
The Korea Ship and Offshore Research Institute,
Pusan National University,
Busan 609-735, South Korea
e-mail: aquinas@dsme.co.kr

Do Kyun Kim

Lloyd's Register Foundation
Research Centre of Excellence,
The Korea Ship and Offshore Research Institute,
Pusan National University,
Busan 609-735, South Korea
e-mail: dokyunkimm@gmail.com

Jung Kwan Seo

Associate Professor
Lloyd's Register Foundation
Research Centre of Excellence,
The Korea Ship and Offshore Research Institute,
Pusan National University,
Busan 609-735, South Korea
e-mail: seojk@pusan.ac.kr

Jeom Kee Paik

Professor
Lloyd's Register Foundation
Research Centre of Excellence,
The Korea Ship and Offshore Research Institute,
Pusan National University,
Busan 609-735, South Korea
e-mail: jeompaik@pusan.ac.kr

1Present address: Daewoo Shipbuilding and Marine Engineering, Geoje 656-714, South Korea.

2Present address: Senior Lecturer in Civil Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, Tronoh 31750, Perak, Malaysia.

3Corresponding author.

Contributed by the Ocean, Offshore, and Arctic Engineering Division of ASME for publication in the JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING. Manuscript received June 27, 2013; final manuscript received July 15, 2014; published online August 8, 2014. Assoc. Editor: John Halkyard.

J. Offshore Mech. Arct. Eng 136(4), 041402 (Aug 08, 2014) (7 pages) Paper No: OMAE-13-1063; doi: 10.1115/1.4028041 History: Received June 27, 2013; Revised July 15, 2014

Precise evaluation of the performance of aging structures is particularly essential in the oil and gas industry, where inaccurate predictions of structural performance may lead to significantly hazardous consequences. It is also important to accurately predict the corrosion behavior of pipeline structures used in the production of gas in subsea areas. The effects of pipeline failure due to a significant reduction in burst strength make it hard for pipeline operators to maintain pipeline serviceability. Therefore, the serviceability of ongoing subsea gas pipelines should be assessed according to their burst strength capacities, which should not exceed the maximum allowable operating pressure (MAOP). In this study, the critical part of the corrosion along a 2.4 km pipeline was evaluated using two approaches: an empirical design codes formula and Ansys numerical analysis. The future integrity of the aging pipeline was then assessed to predict its remaining years of service. The results and outcomes of this study will be useful in evaluating pipeline integrity and predicting the remaining service life of aging pipeline structures.

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References

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Figures

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Fig. 1

(a) Parabolic and (b) rectangular Idealizations of a corroded shape

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Fig. 2

Approximation of corrosion area by modified ASME B31G

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Fig. 3

True stress–strain curve of API X42 steel

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Fig. 4

FE model and boundary conditions of a corroded pipe

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Fig. 6

A phenomenological representation of the corrosion progress using the Melchers model. (SRB = sulfate-reducing bacteria) [34]

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Fig. 7

Pressure and radial displacement record of the corroded pipe (case: DB)

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Fig. 8

Burst pressure results along the gas pipeline

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Fig. 9

ERF results of codes and FEA along the corroded gas pipeline

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Fig. 10

ERF results of the ASME B31G code along the corroded gas pipeline

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Fig. 11

Prediction of failure year and location of failure along the corroded gas pipeline

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