flanges(flange gasket,stainless steel flanges) 1.Materia:304,316,347,321,301, ... ,800 2.Standard: ASME, ANSI, API, JIS, JPI,MS Flanges(flange gasket,stainless steel flanges)Threaded Flanges standard: ANSI/ASME B16.5 ... /316L,321,A105 Certificate: >ISO9001:2000 Threaded flange is similar to slip-on flange, except they a bore and a counter bore ...