... carbon steel flange ; stainless steel flange socket welding steel flange 1,30years focus on QA2,decades experience ... of Canton Fair3,ISO 9001 2000Type: socket welding flangeStandard: ANSI, MSS, API, AWWA, DIN, JIS, BS ... blackPrint, oil or zinc.Packing: Wooden caseWe can also manufacture special application flanges andForgings that customers require. socket welding steel flange