... pipe fittings,include tee,elbow,gasket,nipple and etc. SpecificationsMetal spiral wound gasket: 1.Graphite,PTFE,asbestos as filler 2.Materials ... the heat exchanger with reinforcing rib, please noteFlange type and Spiral Wound Gasket form Flat face flange(F.F)Gasket with ... . E.g. the gasket used for heat exchanger and with ribs, please provide the detailed drawings spiral wound gasket