... :Carbon steel,stainless steel Carbon Steel Weld-neck Flange1), Name: WN flange2), Sizes: From ... flange as following: SIZESTANDARDSERIESPRESSURE11/2”—64”ASTM ANSI B16.5, ASA, API-605,etc..slip-on, welding neck ... 2632,2633, 2543, 2544, etcplate, slip-on, welding neck, blind, threaded etc.Class150,300,600,900,150041/ ... PN25, PN40, etc.plate, slip-on, welding neck, blind, threaded etc.Class150,300,600,900, ...