Lokacin zaɓar bakin karfe waɗanda dole ne su tsayayya da mahalli marasa galuma, galibi ana amfani da bakin ƙarfe ausentic.
Flanged hadin gwiwa yana hade da uku daban-daban daban-daban da ya hade ko da yake; flanges, gas, da kuma bolting; wanda ake tattare da wani tasiri, mai dacewa. Ana buƙatar masu sarrafawa na musamman a cikin zaɓi da aikace-aikacen duk akwai abubuwan da zasu iya samun haɗin gwiwa, wanda ke da karfin gwiwa.
Bakin karfe ba kawai yana nufin wani nau'in flange bakin karfe ba, har ma yana wakiltar sama da 100 na flange na masana'antu bakin ciki. Kowane nau'in ƙarfe na bakin karfe yana da kyakkyawan aiki a takamaiman filin aikin sa. Da farko, manufar flangen za a bayyana, sannan sai a ƙaddara madaidaicin yanayin bakin ciki. Bakin bakin karfe na kowa shine 304, 304l, 316, 316l, da sauransu, da sauransu suna ɗauke da Chromium, nickel da sauran kayan aikin sunadarai. Misali, bugu da Molybdenum na iya kara inganta yanayin atmospherion, musamman ma lalata juriya ga yanayin da ke ɗauke da chloride.