Oil & GasPumps
Centrifugal process pump casing (API 610 OH2 / BB1 / BB3 types)
API 610 (12th ed) primary standard. BB3 for high-pressure multistage. NACE MR0175 for sour service (hardness limits: CS <22 HRC, SS <22 HRC austenitic not restricted but check). EN 10204 3.2. Impeller: SS CF8M or duplex cast + dynamically balanced.
Specifications
Material
Cast Steel ASTM A216 WCB (standard service); A217 WC6/WC9 (high temp); CF8M / CF3M (316/316L SS) for corrosive; CD4MCu duplex (sour/chloride)
Grades
WCB;WC6;WC9;CF8M;CF3M;CD4MCu
Material Class
DuplexCast Steel
Applicable Standards
NACE MR0175API 610EN 10204ASTM A216
Service Conditions
chloridecorrosionsour servicehigh temperature
Common Processes
Resin sand / furan no-bake (complex volute geometry); investment (SS small bore); heat treat (Cr-Mo grades); PWHT
NDT & Inspection
RT (ASME E186 / E280 per API 610 Annex); UT; MT (CS/DI); PT (SS/duplex); hydrostatic 1.5× rated; CMM (impeller clearances); hardness; PMI
Typical Specs & Notes
API 610 (12th ed) primary standard. BB3 for high-pressure multistage. NACE MR0175 for sour service (hardness limits: CS <22 HRC, SS <22 HRC austenitic not restricted but check). EN 10204 3.2. Impeller: SS CF8M or duplex cast + dynamically balanced.
⚠ Caveats
NACE MR0175 for sour service (hardness limits: CS <22 HRC, SS <22 HRC austenitic not restricted but check).