1) Stainless steel flange and carbon steel flange 2) Standard: ASME, ANSI, API, JIS, JPI, DIN, UNI, BS, ... AS 3) Material: 316L, .1) Stainless steel flange and carbon steel flange2) Standard: ASME, ANSI, API, JIS, JPI ... for stainless performance6) Special design availableOuter packing:Seaworthy plywood case high pressure flange