... ,301,625,800 2.Standard: ASME, ANSI, API, JIS, JPI,MS Flanges(flange gasket,stainless steel flanges)Threaded Flanges standard: ANSI ... /ASME B16.5, ANSI B16.47,AWWA C207... API, >Production ... ,F316/316L,321,A105 Certificate: >ISO9001:2000 Threaded flange is similar to slip-on flange, except they a bore and a counter bore. ...