... ,thermal exchange,auto vent-pipe, hole of flange and etc Spiral wound gasket:static sealing element of pipe, valve,pump,thermal exchange ... tape and nonmetal tape, which are overlapped each other and wound continuously. 2) To fasten the metal tape, both its start ... graphite strip, ceramic strip, asbestos strip, teflon strip.5): size: 1/2"-48"6): ASTM, DIN Spiral wound gasket