Umbhobho wentsimbi ye-carbon steel seamless yenziwe ngentsimbi yonke kwaye ayinamthungo phezu komhlaba. Ngokwendlela yokuvelisa, imibhobho engenamthungo yahlulahlulwe ibe ityhubhu eshushu, ibhobho epholileyo, umbhobho otsalwa ngokubanda, umbhobho okhutshiweyo, umbhobho. ukugqekeza njalo njalo.Imibhobho yentsimbi yekhabhoni engenamthungo isetyenziswa ikakhulu njengemibhobho yokomba yepetroleum geology, imibhobho eqhekekileyo yoshishino lwepetrochemical, iityhubhu zebhoyila, imibhobho ethwele intsimbi kunye nemibhobho yentsimbi echanekileyo yolwakhiwo oluphezulu yeemoto, iitrektara kunye nenqwelomoya.