Issuing body
NACE/AMPP
Latest edition
2016
Region
USA, Global
Equipment items
2
Scope
Refining sour service — material requirements for SSC resistance in process units.
Key requirements (7)
- Materials for sour refinery process service (downstream complement of ISO 15156).
- Wet H2S service definition: water + H2S (any concentration in liquid water).
- Carbon steel hardness limit: 200 HB (HV 215) max in HAZ and weld.
- PWHT required for all welds in sour service.
- Charpy impact: 27 J avg / 21 J single at MDMT.
- Materials chemistry: Pcm ≤ 0.25, CE ≤ 0.43 typical for HIC resistance.
- HIC-resistant plate testing per NACE TM0284 (CLR ≤ 15%, CTR ≤ 5%, CSR ≤ 2%).
Related standards (1)
Applied to 2 equipment items
Materials, Welding & Coatings