... quality , competitive price 4.Fine surfa Precision casting carbon steel flanges1.)Material: Stainless steel(304,304L,316,316L,317L,321,321H, ... 310S,,904L,etc), carbon steel.2.)Standard: ASME, ANSI, API, JIS, JPI, DIN, ... ,Steel Cage or as your request. The specifications can be designed and satisfied for customers special requirements. Precision casting carbon steel flanges ...