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AMPP NACE TM0284-2026

Evaluation of Pipeline and Pressure Vessel Steels for Resistance to Hydrogen-Induced Cracking
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NACE TM0284 is the definitive international laboratory test standard used to evaluate the resistance of pipeline and pressure vessel steels to Hydrogen-Induced Cracking (HIC) caused by hydrogen absorption from aqueous sulfide corrosion. The protocol involves exposing unstressed steel specimens to a standardized, H2S-saturated acidic solution for a continuous 96-hour period, simulating the "sour" (high-sulfur) environments typical of oil and gas production. Following exposure, the specimens are cross-sectioned and microscopically examined to calculate the Crack Length Ratio (CLR), Crack Thickness Ratio (CTR), and Crack Sensitivity Ratio (CSR). By providing a uniform testing environment and measurement methodology, TM0284 allows engineers and manufacturers to quantify a material's durability and ensure it meets the safety requirements established by broader compliance standards like ISO 15156 / NACE MR0175.
SDO AMPP: Association for Materials Protection and Performance
Document Number TM0284
Publication Date March 1, 2026
Language en - English
Page Count 36
Revision Level
Supercedes
Committee
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