DSAW (Chitoliro cha mbali ziwiri chozungulira chozungulira)makhalidwe: kupanga ndondomeko welded chitoliro ndi yosavuta, dzuwa mkulu, otsika mtengo, mofulumira chitukuko.Mphamvu ya ozungulira welded chitoliro zambiri apamwamba kuposa dsaw chitoliro ndipo akhoza ang'onoang'ono kupanga billet lalikulu m'mimba mwake chitoliro, mungagwiritsenso ntchito m'lifupi chomwecho cha billet kupanga diameters osiyana chitoliro.Komabe, poyerekeza ndi kutalika komweko kwa chitoliro chowongoka chowongoka, kutalika kwa weld kudakwera ndi 30 mpaka 100%, ndikuchepetsa kupanga.

DSAW (Double-sided spiral submerged arc welded chitoliro) amagwiritsidwa ntchito kwambiri mu gasi, mafuta, mankhwala, magetsi, Kutentha, ngalande, Kutentha kwa nthunzi, hydropower penstock, mphamvu zotentha, madzi ndi mapaipi ena aatali, kuchulukira, kukopera, milatho. , zitsulo ndi minda ina engineering.