Ukusetyenziswa kwephepha lerabha le-asbestos kushishino lokutywina iivalvu kunezi nzuzo zilandelayo:

Ixabiso eliphantsi: Xa kuthelekiswa nezinye izinto zokutywina ezisebenza kakuhle, ixabiso lephepha lerabha le-asbestos lifikeleleka lula.

Ukumelana neekhemikhali: Iphepha lerabha le-asbestos linokumelana okuhle nokugqwala kwezinye izinto ezineempawu zekhemikhali ezibuthathaka, ezinokuhlangabezana neemfuno zeemeko zokusebenza ngokubanzi.

Ulondolozo olulula: Ngenxa yokuba ishiti yerabha ye-asbestos kulula ukuyicubungula nokuyitshintsha, kulula ngakumbi ukugcinwa kwevalvu.

Eyona ngxaki inkulu yephepha lerabha le-asbestos kukuba nangona izinto ze-gasket zongezwa ngerabha kunye nezinye izinto zokuzalisa, azikwazi ukuzalisa ngokupheleleyo iimbobo ezincinci ezidibeneyo, kwaye kukho ukungena okuncinci. Ke ngoko, kwindawo engcolisayo kakhulu, nokuba uxinzelelo kunye nobushushu aziphezulu, azinakusetyenziswa. Xa zisetyenziswa kwiindawo ezithile ze-oyile ezinobushushu obuphezulu, ngokuqhelekileyo kwixesha lokugqibela lokusetyenziswa, ngenxa yokufakwa kwe-carbonization yerabha kunye ne-filler, amandla ayancitshiswa, izinto ziyakhululeka, kwaye kukho ukungena kwindawo yokuhlangana nangaphakathi kwe-gasket, kwaye kukho ukucola kunye nomsi. Ukongeza, iphepha lerabha le-asbestos libotshelelwa ngokulula kumphezulu wokutywina we-flange kubushushu obuphezulu, nto leyo ezisa ingxaki enkulu ekutshintsheni i-gasket.

Kwimeko yobushushu, uxinzelelo lwe-gasket kwiindidi ezahlukeneyo luxhomekeke kwizinga lokugcina amandla ezinto ze-gasket. Kukho amanzi ekristale kunye namanzi afakwe kwi-asbestos fiber material. Kwi-110℃, i-2/3 yamanzi afakwe kwi-fibers inyukile, kwaye amandla okuxinana kwee-fibers ancitshisiwe malunga ne-10%. Kwi-368℃, onke amanzi afakwe kwi-appliances ayaphuma, kwaye amandla okuxinana kwe-fiber ancitshisiwe malunga ne-20%. Ngaphezulu kwe-500 ℃, amanzi ekristale aqala ukuxinana, kwaye amandla aphantsi.

Iphepha lerabha le-asbestos liqulathe ii-ion ze-chloride kunye ne-sulfide, kulula ukwenza iiseli ze-galvanic zokubola ezinee-flanges zesinyithi emva kokufunxwa kwamanzi, ingakumbi umxholo wesalfure wephepha lerabha le-asbestos elimelana neoyile uphezulu ngokuphindwe kaninzi kunowephepha lerabha le-asbestos eliqhelekileyo, ngoko ke alifanelekanga ukusetyenziswa kwiindawo ezingezizo ioyile. Ii-gaskets ziya kuvuvukala kwiindawo ezisebenzisa ioyile kunye ne-solvent, kodwa ngaphakathi koluhlu oluthile, akukho mpembelelo ekusebenzeni kokutywina.

Nangona kunjalo, kubalulekile ukuqaphela ukuba i-asbestos ichongiwe njengento enobungozi, kwaye ukusetyenziswa kwamaphepha erabha e-asbestos kunokubeka iingozi kwimpilo nakwindalo esingqongileyo.