Material standards specify seal compatibility with working environments including sweet and sour gas service. NACE MR0175/ISO 15156 compliance is mandatory for seals exposed to hydrogen sulfide environments. These specifications prevent sulfide stress cracking and ensure long-term durability in corrosive conditions. Material certificates and traceability documentation accompany compli... https://globalsealstech.com/product-category/oil-gas-seals/api-6a-wellhead-equipment-seals/