Tenders for Supply of Gasket For Btpgln Tank Wagons Eduction Valve Gasket Thickness 3.2 Mm O.D. 101.7 Mm I.D. 82.4 Mm As Per Asme B-16.20 Material - Spiral Wound Metallic Gasket Without Inner Ring & Without Outer Ring, Winding Material-Ss.304 & Filler Material Flexible Graphite Fitted Shall Confirmed To Asme B-16.20 Or Equivalent..