... R11-105,RX20-215,BX150-303,Inch1/2"-24" Ring joint gasket (RTJ gasket) are manufactured in accordance with ... ANSI B16.20 and API 6A used on the ring type joint flanges specified in JPI-7S-15, ANSI ... Gaskets are manufactured in different solid metal types like soft iron/SS304/316/321 metal and other alloy items ... 6.Standard:ASME B16.20 7.Material:carbon steel,soft iron,inconel600.M-400,C-276,SS316,SS3048. ...