o Anti-hydrogen sulfide flanges comply with the standard NACE MR0175/ISO15156: It provides recommendations for the selection and evaluation of materials to prevent sulfide stress corrosion cracking (SSC), hydrogen-induced cracking (HIC), and related damages in environments containing hydrogen sulfide. This standard is applicable to the materials of pipelines, pressure vessels, and related equipment, including carbon steel flanges.
o Application in the oil and gas industry: During the processes of oil and gas extraction, transportation, and processing, oil and gas media containing hydrogen sulfide are often encountered. Anti-hydrogen sulfide flanges are widely used in wellhead manifolds, gas production trees, oil and gas transportation pipelines, refinery equipment, etc., to ensure the safe operation of the equipment and prevent corrosion and safety accidents caused by the leakage of hydrogen sulfide.
o Chemical industry: In some chemical production processes, such as desulfurization, sulfuric acid production, and other technologies, hydrogen sulfide or other sulfur-containing media may also be involved. Anti-hydrogen sulfide flanges can be used to connect reaction kettles, storage tanks, pipelines, and other equipment to ensure the tightness and safety of the production process.
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