Amapangidwa ngati machubu a fumace, machubu osinthira kutentha ndi mapaipi m'mafakitale a mafuta ndi mafakitale oyeretsera mafuta
Amagwiritsidwa ntchito popanga mapaipi oziziritsidwa ndi madzi, mapaipi amadzi otentha, mapaipi a nthunzi otentha kwambiri, mapaipi a nthunzi otentha kwambiri a ma boiler a locomotive, mapaipi akuluakulu ndi ang'onoang'ono a utsi ndi mapaipi a njerwa za arch, ndi zina zotero.
Chitsulo cha Carbon Cstructure chapamwamba kwambiri; Chitsulo cha Alloy cha kapangidwe kake; Chitsulo cholimba ndi dzimbiri chosatentha
