... ,321,321H,310S,,904L,etc), carbon steel.2.)Standard: ASME, ANSI, API, JIS, JPI, DIN, UNI, BS, AS3.)Type: Plate Flange ... ,chemical,medical equipment,aviation,boiler heat exchanger,and other fields. 5.)Packing:Wooden cases or Wooden pallet,Steel Cage or as ... and satisfied for customers special requirements. Precision casting carbon steel flanges