... are employed where corrosive agents are present Ring Joint Gasket (RTJ gasket) are manufactured in accordance with JPI-7S23, ANSI B16 ... on the ring type joint flanges specified in JPI-7S-15, ANSI B16.5, API spec 6A and MSS sp-44 ... .Applied standard: Wrapping liner OctagonallinerANSLI B16.5-1793,JPI-75-15-70GB 699,GB1220,JB755 RTJ gasket