Issuing body
ISO
Latest edition
Parts 1–3, 2020
Region
Global
Equipment items
2
Scope
Sour service material requirements for upstream — SSC, HIC, SOHIC, SZC resistance.
Key requirements (8)
- Materials for sour service (H2S) in oil & gas production — also as NACE MR0175.
- Sour service threshold: H2S partial pressure ≥ 0.05 psia (0.34 kPa).
- Carbon steel hardness limit: 22 HRC (250 HV) max — prevents SSC.
- PWHT mandatory for CS in sour service; hardness verified.
- Materials qualification: laboratory test per NACE TM0177 (Method A, B, C, D) at relevant H2S/Cl/pH.
- Region 1: SSC (sulfide stress cracking), Region 2: SOHIC, Region 3: HIC.
- 13 % Cr martensitic (S13Cr): qualified for sour service with H2S limits.
- Duplex stainless (UNS S31803/S32750): qualified by environmental severity.
Related standards (1)
Applied to 2 equipment items
Materials, Welding & Coatings