Ishubhu lesakhiwo:

I-Structural tube iyishubhu yensimbi yesakhiwo evamile, ebizwa ngokuthi ishubhu lesakhiwo. Ilungele amashubhu ensimbi angenamthungo wezakhiwo ezijwayelekile kanye nezakhiwo zemishini. Izinto ezivame kakhulu yi-carbon steel, engahlukaniswa ngezinhlobo ezimbili: insimbi evamile ye-carbon structural kanye nekhwalithi ephezulu ye-carbon structural steel. Kukhona ukusetshenziswa okuningi kanye nenani elikhulu lokusetshenziswa. Isetshenziswa kakhulu kojantshi wesitimela, amabhuloho, kanye namaphrojekthi wokwakha ahlukahlukene ukuze kukhiqizwe izingxenye zensimbi ezahlukahlukene ezithwala imithwalo engashintshi, kanye nezingxenye zemishini ezingabalulekile ezingadingi ukwelashwa kokushisa kanye nokushiselwa okujwayelekile.
Amashubhu esakhiwo angenamthungo amashubhu ensimbi asetshenziselwa ukwakha izakhiwo ezihlukahlukene ngoba asetshenziselwa ukwakha izakhiwo ezihlukahlukene ezidinga ukufeza izakhiwo eziningana.
1. Umthamo wokuthwala ingcindezi kufanele ube muhle, futhi akukho ukuphuka okungenzeka, ngaphandle kwalokho, uma kwenzeka ingozi, ukwakhiwa kwephrojekthi yonke kuzothinteka.
2. Kulula ukwakha. Idinga kuphela ukwakhiwa ngokwezinga elijwayelekile, futhi ingaqedwa ngokushesha.
3. Ihlala isikhathi eside, ingasetshenziswa isikhathi eside ngemva kokuqedwa kwephrojekthi, futhi ngeke yonakaliswe futhi igqokwe isikhathi eside.

I-fluid tube:
Izinga leshubhu eliwuketshezi lilungele amashubhu ensimbi angenamthungo okudlulisa uketshezi. Amashubhu angenamthungo angamapayipi ensimbi asetshenziselwa ukuthutha uketshezi oluhlukahlukene namagesi afana nowoyela, igesi yemvelo, igesi yemvelo namanzi. Ngenxa yokuthi isetshenziselwa ukuthutha, amapayipi amanzi nawo anezici zawo eziphawulekayo.

1. Ukuqina komoya okuhle, akukho ukuvuza okuvunyelwe ngesikhathi sokuthutha, ngaphandle kwalokho igesi izovuza, futhi imiphumela izoba yinhlekelele.
2. Vimbela ukugqwala, ngoba izinto eziningi ezihanjiswayo ziyagqwala, uma ukugqwala kwenzeka, yonke iphrojekthi izothinteka.
3. Ukushelela kwepayipi kufuna kakhulu, futhi kudinga ukuhlangabezana nezidingo ngaphambi kokuba kwenziwe ipayipi eliwuketshezi.

Okokuqala, uma sikhuluma ngokuqinile, azikwazi ukwabiwa. Amashubhu esakhiwo adinga umthamo omuhle wokuthwala ingcindezi, kuyilapho amapayipi oketshezi edinga ukusebenza kahle kokuvala. Ngakho-ke, ukusetshenziswa kokubili kuhluke kakhulu. Zama ukungasebenzisi indawo engafanele.

Okwesibili, amapayipi esakhiwo anezidingo eziphezulu ezindlekweni, ngaphandle kwalokho amanye amashubhu ensimbi awekho ezingeni elijwayelekile mayelana nokumelana nokugqwala noma amandla okuthwala ingcindezi, futhi alimala kalula. Uma amanzi nokudla kuhanjiswa ngamapayipi oketshezi, izidingo zenhlanzeko ziqinile. Kungabiwa ngaphansi kwezimo ezikhethekile, futhi ezinye izici ziyefana, inqobo nje uma izidingo zemvelo zingenonya kakhulu, zingabiwa.