Material selection standards specify compatibility with sour gas environments containing hydrogen sulfide. NACE MR0175/ISO 15156 compliance is mandatory for seals exposed to sour service conditions. These specifications prevent sulfide stress cracking and ensure long-term durability. Material certificates and traceability documentation accompany compliant seals, providing verification... https://globalsealstech.com/product-category/oil-gas-seals/api-6a-gate-valve-seals/