carbon steel flange ISO Ctification Standards:ANSI,DIN,JIS,GB,BS special design available size:10~6000mm ... carbon steel slip on 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 ... to contact us, I'll reply you in 24 hours cs slip on flange