ISO 15590-2:2021

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Petroleum and natural gas industries — Factory bends, fittings and flanges for pipeline transportation systems — Part 2: Fittings

ISO 15590-2:2021 is an international standard that specifies the technical delivery conditions for pipeline fittings used in the petroleum and natural gas industries, particularly focusing on welding-end fittings like elbows, tees, caps, reducers, and transition sections made from unalloyed or low-alloy steels; it defines two classes of fittings: one for non-sour service and another for sour service environments