Carbon Steel Flange 1.Material: Stainless Steel,Carbon Steel ,Alloy Steel 2. ... 2''-64''ASTM ANSI B16.5, ASA, API-605,etc..slip-on, welding neck, blind, threaded, lap-joint, etc.Class150,300 ... etc.Class150,300,600,900,150041/2''-64''BS4504, PN16, PN25, PN40, etc.plate, slip-on, welding neck, blind, threaded etc.Class150, ... need,pls feel free to contact us. Carbon Steel Flange (Plate/Slip-On/Welding Neck)