Cov flange gasket yog siv los ua kom tiav cov nyhuv ntawm cov nplig flange. Lub gasket yog lub nplhaib ua los ntawm cov khoom siv uas tuaj yeem yauv yas deformation thiab muaj qee lub zog. Cov gaskets feem ntau yog txiav los ntawm cov hlau tsis yog daim hlau los yog tsim los ntawm cov kws tshaj lij kev lag luam raws li cov qauv ib txwm muaj. Cov ntaub ntawv yog asbestos roj hmab paib, asbestos daim hlau, PTFE daim hlau, daim hlau polyethylene, thiab lwm yam.; daim hlau nyias daim hlau (tinplate, Stainless hlau) Lub thawv hlau ua cov khoom siv ua los ntawm cov khoom tsis muaj hlau xws li cov pa roj av.
Raws li qib sib txawv ntawm cov siab, flange pads kuj tseem muaj cov ntaub ntawv sib txawv, los ntawm cov ntaub ntawv qis asbestos siab, kev tiv thaiv siab-asbestos thiab pads PTFE rau cov ntaub ntawv hlau. Cov kab hluav taws xob sib txuas yog yooj yim siv thiab tuaj yeem lees txais lub siab loj. Hauv kev lag luam kev sib txuas, flange pob qij txha tau siv dav.