... special design available size:10~6000mm carbon steel square flangeSTANDARDS:. ANSI B16.5/MSS.SP 44,JIS B2220,DIN AND BS NORMS ... . ASME, ANSI, API, JIS, JPI, DIN, UNI, BS, AS.JIS Weld NeckProduction ... :Class 150, 300, 600, 900, 1500 and 2500Pressure Ratings:PN 6, PN 10, PN16, PN25, PN40 and PN64Pressure Ratings:JIS 5K ...