... composition test:NDT steel forged, cast flange can be provided Standard:ANSI Forging flange, and cast flange can be provided as per buyer ... , carbon steel and special steelType:Plate flange, blind flange, reducing flange, thread flange, ring, orifice flange, welding neck ring type flange and etc.Standard:ANSI, DIN ... email.Tel:0086-411-82778268Fax:0086-411-82778368Attn:Mr. Alex/ Ms. Sophia flange