Umbhobho wentsimbi ongenamthungo wenziwa ngokugqobhoza yonke intsimbi engqukuva, kwaye umbhobho wentsimbi ngaphandle komthungo wentsimbi kumphezulu ubizwa ngokuba ngumbhobho wentsimbi ongenamthungo. Ngokwendlela yokuvelisa, imibhobho yentsimbi engenamthungo inokwahlulwa ibe yimibhobho yentsimbi engenamthungo eqengqelekayo, imibhobho yentsimbi eqengqelekayo ebandayo, imibhobho yentsimbi engenamthungo etsalwa ngokubanda, imibhobho yentsimbi engenamthungo ekhutshiweyo, kunye nokugqobhoza kwemibhobho. Ngokwemilo ye-cross-sectional shape, iityhubhu zensimbi ezingenamthungo zahlulwe zibe ziindidi ezimbini: ezijikelezileyo nezikhethekileyo, kunye neetyhubhu ezinokwakheka okukhethekileyo zinemilo eyahlukeneyo enzima efana nesquare, oval, triangular, hexagonal, melon-shaped, star-shaped, kunye neetyhubhu eziphekiweyo. Ubukhulu bedayamitha bufikelela kwi-900mm kwaye ubuncinane bedayamitha yi-4mm. Ngokokusetyenziswa okwahlukeneyo, kukho imibhobho yentsimbi engenamthungo engqindilili kunye nemibhobho yentsimbi engenamthungo. Imibhobho yentsimbi engenamthungo isetyenziswa ikakhulu njengemibhobho yepetroleum yokomba yejoloji, imibhobho eqhekekileyo yoshishino lwepetrochemical, imibhobho yebhoyila, imibhobho ethwele, kunye nemibhobho yentsimbi echanekileyo yolwakhiwo oluphezulu lweemoto, iitrektara, kunye nenqwelomoya.

Umbhobho wentsimbi ongenamthungo ecaleni komjikelezo wecandelo lawo elinqamlezayo. Ngokweendlela ezahlukeneyo zokuvelisa, ihlulwe ibe ngumbhobho oshushu, umbhobho opholileyo, umbhobho obandayo, umbhobho okhutshiweyo, umbhobho wepayipi, njl., zonke zinemigaqo yazo yenkqubo.

Izinto eziphathekayo zibandakanya insimbi eqhelekileyo kunye nekhwalithi ephezulu ye-carbon structural steel, i-alloy iron ephantsi, insimbi ye-alloy, njl.

Ngokwenjongo, ihlulwe ibe ngamacandelo amabini: injongo ngokubanzi (kumanzi, imibhobho yegesi kunye neengxenye zesakhiwo, iindawo zomatshini) kunye nenjongo ekhethekileyo (yebhoilers, ukuhlola i-geological, iibheringi, ukuxhathisa i-asidi, njl.).

Idayamitha yangaphandle yombhobho ongenamthungo oqengqelekayo ngokuqhelekileyo mkhulu kune-32mm, kwaye ubukhulu bodonga yi-2.5-200mm. Ububanzi obungaphandle bombhobho wentsimbi ongenamthungo obandayo bunokufikelela kwi-6mm, kwaye ubukhulu bodonga bunokufikelela kwi-0.25mm. Ukuqengqeleka kunomgangatho ophezulu wokuchaneka kunokuqengqeleka okushushu. Ngokubanzi, imibhobho yentsimbi engenamthungo yenziwe nge-10, 20, njl. njl., i-alloy structural steels.P5, P9, P11, P22, P91, P92, 15mog, 20mog, 12crmog, 15crmog, 12cr2mog, 12crmovg, njl. ye.10, 20kunye nezinyeimibhobho yentsimbi ephantsi ingenamthungozisetyenziswa ikakhulu kwimibhobho ehambisa ulwelo. Ngokuqhelekileyo, iibhobho zentsimbi ezingenamthungo zisetyenziselwa ukuqinisekisa amandla kunye neemvavanyo zokubethelela. Imibhobho yentsimbi eshushu ihanjiswa kwindawo eshushu okanye ephethwe ngubushushu; imibhobho yentsimbi epholileyo ihanjiswa kwisimo sokushisa.