1) Stainless steel flange and carbon steel flange 2) Standard: ASME, ANSI, DIN, UNI, BS, JIS, JPI,AWWA, MSS, API,ORIFICE Manufacture standard as following: ISO7005-Ι,GB9112 to 9124, GB13402, SH3406, HG20615 to 20623, HG20592 to 20605, JB74 to 90,ASME/ASNI B16.5/16.36/16.47A/16.47B, MSS Sp44, JIS B2220 to 2001, DIN2527/2636/2637/2638/ 2566/ 2576/2632/2633/2635/2642/2653/2656/2655, BS1560-3.1, ...