... ,thermal exchange,auto vent-pipe, hole of flange and etc Spiral wound gasket:static sealing element of pipe ... valve,pump,thermal exchange,auto vent-pipe, hole of flange and etc 1) Consists of "V-shape" (or " ... ) To fasten the metal tape, both its start point and end point are tack welded.3) Types: a) R type ... d) CGI type: spiral winding with outer guide and inner ring.4)material: metal ring include SS304, ...