1. Standard: ASME, ANSI, JIS, DIN, GB, BS, etc. 2. Size: 1/2” to 24"3. Pressure Class:150#,300#,600#, 900#, 1500#, 2500#.4. Material: A105, 201, 202, 304, 304L, 310, 316, 316L, etc.We can offer the flange according to your request