Assessment of Pipeline Integrity with Circumferential Corrosion Using ASME B31.G and BS 7910
DOI:
https://doi.org/10.25170/jpk.v2i05.6960Keywords:
pipeline integrity, corrosion defect , axial stress, ASME B31.G, BS 7910Abstract
Pipeline integrity is essential for ensuring the safe and reliable transportation of hydrocarbons. Corrosion is one of major cause of pipeline failure and requires regular assessment. The ASME B31.G method is commonly used in Indonesia to evaluate pipeline integrity based on hoop stress due to internal pressure. However, this method does not account for axial stress, which can become significant in the presence of circumferential corrosion defects. This study assesses a pipeline with 19 corrosion defects using ASME B31.G and compares the results with BS 7910, which considers both hoop and axial stresses. Future defect growth is predicted using DNV RP F101. Results show that two circumferential defects are governed by axial stress in 2027 and 2030, and that ASME B31.G significantly overestimates safe operating pressure in such cases. A simulation further reveals that axial stress tends to dominate when corrosion depth exceeds 50% of wall thickness. This study recommends identifying defect orientation and using BS 7910 for a more conservative assessment when axial stress is likely to govern.
References
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