Dhuumaha birta birta ah waa nooc ka mid ah tuubooyinka birta ee shubka ah.Shuruudaha tayada leh ee kontoroolka darajada spheroidization tuubada birta ee 1-3 (heerka spheroidization "80%), sidaas darteed sifooyinka farsamada ee maadada lafteeda ayaa si fiican loo hagaajiyey, oo leh dabeecadda birta, waxqabadka birta.Dhuumaha birta ductile Annealed, qaab-dhismeedka metallographic waa ferrite iyo qadar yar oo pearlite ah, guryaha farsamo wanaagsan, iska caabin daxalka aad u fiican, ductility wanaagsan, saamayn shaabadeynta wanaagsan, fududahay in la rakibo, inta badan loo isticmaalo dawladda hoose, warshadaha iyo shirkadaha macdanta biyaha sahayda, gaaska, saliid iyo wixii la mid ah.
Xaddi cayiman oo garaafyada wareega ah ayaa lagu qaybiyaa matrix ferrite iyo pearlite.Marka loo eego shuruudaha dhexroorka magaca iyo dhererka, saamiga ferrite iyo pearlite ee matrixku waa ka duwan yahay.Qaybta pearlite ee dhexroorka yar guud ahaan kama badna 20%, iyo in dhexroorka weyn waxaa guud ahaan lagu xakameeyaa ilaa 25%.
Waxay leedahay dabeecadda birta, waxqabadka birta, waxqabadka anticorrosion aad u fiican, ductility wanaagsan, saamaynta shaabadeynta wanaagsan, fududahay in la rakibo, inta badan loo isticmaalo shirkadaha dawladda hoose, warshadaha iyo macdanta biyaha, gaaska, saliidda iyo wixii la mid ah.Waa doorashada koowaad ee tuubada biyaha, oo leh waxqabad qiimo sare leh.Marka la barbardhigo tuubada PE, laga bilaabo wakhtiga rakibidda, rakibidda tuubada khad wareegsan ayaa ka fudud oo ka dhaqso badan tuubada PE, cadaadiska gudaha iyo dibedda ayaa ka fiican ka dib marka la rakibo;Laga soo bilaabo aragtida hawada iyo anticorrosive ee aragtida, ka dib marka la rakibo tuubada khad wareega ee hawada ayaa ka fiican, laakiin sidoo kale iyada oo loo marayo siyaabo kala duwan oo ka hortag ah si loo hagaajiyo caabbinta daxalka;Marka la eego waxqabadka hydraulic, qeexitaannada tube khad spheroidal guud ahaan waxay tixraacayaan dhexroorka gudaha, iyo qeexitaannada tuubada PE guud ahaan waxay tixraacayaan dhexroorka dibadda, sababtoo ah isla tilmaamo isku mid ah, tuubada khad spheroidal waxay gaari kartaa qulqul weyn;Laga soo bilaabo rajada qiimaha rakibaadda iyo dayactirka dhamaystiran, tuubada khad spheroidal waxay leedahay wax qabad qiimo sare leh.Darbiga gudaha oo buufinaya zinc, hoobiye sibidhka walxaha ka-hortagga daxalka.