... /S , Alloy Steel 5:Marking as Customer design. Carbon Steel Swivel Ring Flange Type Weld Neck,Slip-On,Blind,Socket Weld,Lap ... "-72"Class 150#,300#,400#,600#,900#,1500#,2500# Specification Carbon Steel ASTM A105/A694 F42/46/52/60/A350 LF2 ... , 600 , 900, 1500 , 2500* ASME/ANSI B16.47(SERIES A & B) : WELDING NECK FLANGE, BLIND FLANGE. Pressure Class : 75, 150, 300 ...