The recent premature failure of TMCP steel pipes handling sour gas was attributed to the presence of local hard spots. This raised concern regarding the suitability of the Thermo-Mechanically Controlled Process (TMCP) steel for sour service. The paper discusses the impact of hard spots on pipeline fracture resistance in sour service, proposes a basis for steel specification to avoid the formation of hard spots and presents a recommended qualification program to ensure the integrity of the steel pipelines despite the presence of hard spots.
Integrity of Sour Gas Pipeline Despite Local Hard Zones
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Salama, MM, Rincon, H, & Wilson, S. "Integrity of Sour Gas Pipeline Despite Local Hard Zones." Proceedings of the ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. Volume 4: Materials Technology. Madrid, Spain. June 17–22, 2018. V004T03A017. ASME. https://doi.org/10.1115/OMAE2018-78672
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