1ANSI ASTM ANSI B16.5, ASA, API-605, AWWA-c207, MSS-sp44 Kind of flange: slip-on, welding neck, blind, threaded, lap-joint, socket-welding etc. Class of pressure: Class 150,300,600,900,1500. Size:1/2"-----60"2JIS JIS 5K, 10K, 16K, 20K etc. Kind of flange: plate, slip-on, blind etc. Size: 1/2"------36"3DIN DIN2573,2572,2631,2576,2632,2633,2543,2544,2634,2545 etc. Kind of flange: plate, slip-on, welding neck, blind, threaded etc. Size:1/2"-------36"4BS BS4504, PN16, PN25, PN40, BS10, TABLE E, BS10 TABLE D, etc. Kind of flange: plate, slip-on, welding neck, blind, threaded etc. Size:1/2"-------36"5UNI UNI2276, 2277,2278,6083,6084,6091,6092,6093,2281,2282,2283,2284,6089,6090,2253, 2254 Kind of flange: plate, slip-on, blind etc. Size:1/2"-------36" 6We can also manufacture special application flanges and forging parts(3m,5 ton hereinafter) that customer。