Hydrogen Embrittlement in Oil Country Tubular Goods and Line Pipes

摘要

OCTG (Oil Country Tubular Goods) and linepipes used for production and transportation of oil and gas arethe major steel products which suffer hydrogen embrittlement(HE) because they are often exposed to wet hydrogen sulfide(sour) environments, where a lot of hydrogen enters the steel.Typical damage types of HE are hydrogen induced cracking(HIC) and sulfide stress cracking (SSC). First, hydrogen uptakebehavior of the steel in sour environments are explained.Concerning HIC and SSC, their mechanisms and metallurgicalcontrolling factors are outlined. Finally it would be understoodthat developments of OCTG and line pipes resistant to sour havepromoted steel production technology for these several decades.