Specifying equipment for sour service: a NACE MR0175 primer
What H₂S partial pressure means for your material selection — and what to ask your supplier.
Hydrogen sulfide can cause sulfide stress cracking in susceptible materials. NACE MR0175 / ISO 15156 defines the materials and hardness limits that are acceptable for sour environments.
When requesting a quote, include H₂S partial pressure, chlorides, pH and temperature so our engineers can recommend the correct material class.