Carbon Steel Flange 1.Material: Stainless Steel,Carbon Steel , ... ASA, API-605,etc..slip-on, welding neck, blind, threaded, lap-joint, etc.Class150,300,600,900 ... 2543, 2544, etcplate, slip-on, welding neck, blind, threaded etc.Class150,300,600,900,150041/2''-64''BS4504 ... , PN40, etc.plate, slip-on, welding neck, blind, threaded etc.Class150,300,600,900,150051/2''-64 ... free to contact us. Carbon Steel Flange