... 1:Swivel Ring Flange 2:1/4" --- 72" 3:150#,300#--2500# 4: C/S ,S/S , Alloy Steel 5:Marking ... as Customer design. Carbon Steel Swivel Ring Flange Type Weld Neck,Slip-On,Blind ... 150#,300#,400#,600#,900#,1500#,2500# Specification Carbon Steel ASTM A105/A694 F42/46/52/60/A350 LF2 ... , Incoloy 825/800 Cu-Ni 90/10,70/30Forged Steel Flanges:* ASME/ANSI B16.5 : WELDING NECK FLANGE, ...