... of connection:butt weldingOperated way: manual,gear,electricDesign & manufacture Std.:JB/T3595, GB/T12235, E101, ANSI B16.34Face to face Std ... Std.:GB/T12224, E101, ANSI B16.25Test Std.:GB/T13927, JB/T9092, JB/T3595, E101, API 598Body material:Cr-Mo, ASTM F12 ...