Sour Service Valves: NACE MR0175, H2S and Material Selection Guide
Quick Summary: Sour service valves are selected for H2S-containing environments where susceptible metallic materials can suffer sulfide stress cracking and other forms of hydrogen-related damage. A purchase order should not rely only on the phrase “NACE compliant.” Buyers should identify the actual service environment, applicable sour-service standard, valve components within the required scope, material grades […]
Hydrogen Induced Cracking (HIC) Explained for Valves
Learn how hydrogen-induced cracking (HIC) develops inside steel valve bodies and pressure components exposed to hydrogen sulfide and sour-service environments. The guide explains the causes, failure risks, material-selection requirements, NACE MR0175/ISO 15156 compliance, HIC testing, and inspection practices used to prevent hidden cracking and unexpected valve failure.