... .Standard: ANSI,DIN,JIS,BS,KS4.Specification SIZESTANDARDSERIESPRESSURE11/2''-64''ASTM ANSI B16.5, ASA, API-605,etc..slip-on, welding neck, blind, threaded ... .plate, slip-on, welding neck, blind, threaded etc.Class150,300,600,900,150051/2''-64''JIS 5K, 10K, 16K, 20K etc.plate, slip-on, blind etc ... have any need,pls feel free to contact us. Carbon Steel Flange (Plate/Slip-On/Welding Neck)