Pipe stress simulation and failure analysis of carbon steel flange spool in CO2gas flow condition

Laksmana Putra Leuvinadrie, Johny Wahyuadi M. Soedarsono

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Every year the repair costs for pipe replacement are lost due to corrosion in gas and oil pipelines increasing this can also affect the LPO (Loss Production Opportunity) due to production stoppages, due to the replacement and repair process. Currently investigating the cause of the damage is an alternative prevention to take preventive measures for the occurrence of the same condition, in addition to reducing costs and reducing consumption of new pipes for replacement. This paper examines the metallurgical and stress aspects of the material failure on the Flange Spool T Arm in the SBG-17 well head (upstream) and the Flange Spool Header Manifold (downstream), where the Spool Header Manifold was a combined flow of the SBG-17 and SBG-16 well heads. In the same condition, there was no material failure on the Flange Spool T Arm in the SBG-16 well head. The simulation results show the maximum calculated pipe stress, less than the allowable stress, the lines conform to ASME B32.3 code for the operating temperature of 60oC and 570 Psig respectively. Suspected of corrosion products at the damaged area of sample were iron oxides (FeOOH and/or Fe2O3), iron carbonates (siderite-FeCO3) and iron sulfides (FeS). The form of damage on the weldment flange spool well head only occur on the weld area, due to turbulence the layer of siderite is swiped away leaving local breakdown of corrosion products that exposed the metal to environment then it acts as anodic site where dissolution reaction occurs. The form of damage on the weldment flange spool header not only occur on the weld area, but also occurs at the base metal area. SEM observation on sample revealed the cubic shapes of corrosion products, which were typical for siderite (FeCO3) as the product of CO2 corrosion. This kind of corrosion commonly occur in mature oil wells, combination of high water cut and partial pressure of CO2.

Original languageEnglish
Title of host publicationProceedings of the 13th AUN/SEED-Net Regional Conference on Materials, RCM 2020 and the 1st International Conference on Materials Engineering and Manufacturing, ICMEM 2020
EditorsRachmadi Norcahyo, Tomohiro Yokozeki, Ahmad Fauzi Mohd Noor, Alvin Y. Chua, Johny Wahyuadi Soedasrsono
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735441446
DOIs
Publication statusPublished - 11 Nov 2021
Event13th AUN/SEED-Net Regional Conference on Materials 2020, RCM 2020 and the 1st International Conference on Materials Engineering and Manufacturing, ICMEM 2020 - Yogyakarta, Indonesia
Duration: 27 Jan 202128 Jan 2021

Publication series

NameAIP Conference Proceedings
Volume2338
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference13th AUN/SEED-Net Regional Conference on Materials 2020, RCM 2020 and the 1st International Conference on Materials Engineering and Manufacturing, ICMEM 2020
Country/TerritoryIndonesia
CityYogyakarta
Period27/01/2128/01/21

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