Wani muhimmin al'amari da za a yi la'akari da shi na kayan ƙarfe a cikin kayan lantarki masu tabbatar da fashewar abubuwa shine haɓakar su don kunna haɗakar gas-iska mai fashewa ta hanyar tartsatsin injin.. Bincike ya nuna cewa abubuwan da ke tattare da waɗannan karafa suna taka muhimmiyar rawa wajen iya kunna su. Don hana faruwar wutar lantarki ta injina a cikin shingen ƙarfe, An wajabta takamaiman iyakoki na asali. Ma'auni don m yanayi – Abubuwan Bukatun Kayan Aikin Gabaɗaya – saka wadannan:
Darasi na I
A cikin samar da RPL matakin MA ko Mb na'urorin lantarki masu hana fashewa, abun da ke ciki na aluminum, magnesium, titanium, kuma zirconium a cikin kayan da aka rufe kada ya wuce 15% ta taro, da kuma yawan adadin titanium da aka haɗa, magnesium, kuma zirconium kada ya wuce 7.5%.
Darasi na II
Don samar da kayan aikin lantarki mai tabbatar da fashewar Class II, jimillar yawan adadin abubuwa masu mahimmanci a cikin kayan da aka rufe sun bambanta dangane da matakin kariya: Don kayan aikin EPLGa, jimlar abun ciki na aluminum, magnesium, titanium, kuma zirconium kada ya wuce 10%, tare da magnesium, titanium, kuma zirconium ba ya wuce 7.5% gaba daya; Don kayan aikin EPLGb, jimlar abun ciki na magnesium da titanium kada ya wuce 7.5%; Game da kayan aikin EPLGc, ban da magoya baya, fan rufe, kuma ramin samun iska ya baci gamuwa da ka'idojin EPLGb, babu ƙarin takamaiman buƙatu.
Darasi na III
A cikin kera na'urorin lantarki masu tabbatar da fashewar Class III, jimlar yawan adadin abubuwan da ake buƙata na abubuwan da suka dace a cikin kayan rufewa shima ya bambanta da matakin kariya: Don na'urorin EPDa, magnesium da titanium abun ciki kada ya wuce 7.5%; Don na'urorin EPLDb, iyakance iri ɗaya ya shafi; Don na'urorin EPLDc, ban da magoya baya, fan rufe, da ramin samun iskar shaka baffles suna bin ka'idojin EPLDb, babu ƙarin buƙatu na musamman.