Oil & GasValves
Pressure relief / safety valve body (PSV/PRV – process plant)
API 526 / ASME VIII. Trim: SS / Inconel for H₂S. Spring: Hastelloy or Elgiloy for corrosive. Note: nozzle and disc – sometimes investment cast; body often cast WCB for Class 300.
Specifications
Material
Cast Steel WCB; CF8M (316SS); CF3M (316L) for cryogenic
Grades
WCB;CF8M;CF3M
Material Class
Cast Steel
Applicable Standards
API 526
Service Conditions
corrosionsour servicecryogenic
Common Processes
Resin sand / investment (complex body geometry)
NDT & Inspection
RT; PT/MT; hydrostatic; set pressure test (API 527); dimensional; PMI
Typical Specs & Notes
API 526 / ASME VIII. Trim: SS / Inconel for H₂S. Spring: Hastelloy or Elgiloy for corrosive. Note: nozzle and disc – sometimes investment cast; body often cast WCB for Class 300.