Umbhobho wentsimbi odityanisiweyo, okwaziwa ngokuba ngumbhobho odityanisiweyo, ngumbhobho wentsimbi owenziwe ngepleyiti yentsimbi okanye intsimbi yentsimbi emva kokukhuhla kunye nokuwelda, ngokubanzi iimitha ezi-6.Inkqubo yokuvelisa umbhobho wentsimbi edityanisiweyo ilula, ukusebenza kakuhle kwemveliso ephezulu, iinkcukacha ezahlukeneyo, utyalo-mali oluncinane lwezixhobo, kodwa amandla ngokubanzi angaphantsi kunombhobho wentsimbi ongenamthungo.
Umbhobho odityanisiweyo owenziwe ngedayamitha omncinci wamkela ukuwelda komthungo othe tye, umbhobho odityanisiweyo omkhulu wamkela i-spiral welding.Ngokwemilo yesiphelo sombhobho wensimbi, ihlulwe ibe yiphayiphu edityanisiweyo yesetyhula kunye ne-special-shaped (isikwere, uxande, njl.)Ngokwezixhobo ezahlukeneyo kunye nokusetyenziswa, yahlulahlulwe yaba yimibhobho yentsimbi edityanisiweyo yokuthutha ulwelo lwemigodi, imibhobho yentsimbi efakwe igalvanized yokuhambisa ulwelo olunoxinzelelo oluphantsi, kunye nemibhobho yentsimbi edityanisiweyo yombane yeerola zokuhambisa ibhanti.Ngokwetheyibhile yenkcazo kunye nobungakanani kumgangatho wesizwe wangoku, i-diameter yangaphandle * ubukhulu bodonga buhlelwa ukusuka kwincinci ukuya enkulu.