Janar mai tanki rufi kai dauki sanyi juyawa, amma a lokacin da rufi kai kauri mafi kauri ko kayan ƙarfi ne mai girma don amfani da sanyi juyawa zai zama da wahala, ga rufi kai a gefen sanyi juyawa kayan aiki ikon iyaka, idan amfani da sanyi juyawa, zai faru da kayan layering, farfajiyar micro cracks da sauran matsaloli; Ba za a iya sarrafa sanyi juyawa fiye da ikon ikon ba. A wannan lokacin, za a iya sarrafawa ta hanyar zafi juyawa. Oval rufi kai gaba daya siffar da kuma petal siffar.

Mai tanki rufi kai gaba daya siffar bisa ga tsarin aiki ne yafi stamping siffar da juyawa siffar, mai tanki rufi kai, da kuma kadan amfani da siffar, gas (ruwa) matsin lamba fadada siffar da sauransu. Za'a iya rarraba gaba ɗaya tsari bisa ga zafin jiki na sarrafawa zuwa sarrafawa mai sanyi da sarrafawa mai zafi (wanda ake kira sarrafawa mai zafi, a zahiri nau'in sarrafawa mai sanyi ne). Hanyar sarrafawa da haɗin zafi yana da zafi mai juyawa, zafi mai hatimi, sanyi mai juyawa, sanyi mai hatimi da kuma matsa lamba.

Man fetur tank rufi kai a kan walda aka raba zuwa juyin walda rufi kai, bearing walda rufi kai. Ana amfani da kayan aikin kwantena daban-daban kamar tankuna, masu musayar zafi, hasumiyoyi, reactors, boilers da na'urorin rabuwa da sauransu. Man fetur tank rufi ne mai mahimmanci bangare a cikin petrochemical, atomic makamashi zuwa abinci da magunguna da yawa masana'antu matsin lamba kwantena kayan aiki. Man fetur tank rufi kai ne wani nau'i na boiler sassa a matsin lamba kwantena. Yawancin lokaci ana amfani da shi a biyu ƙarshen matsin lamba kwantena.