Hluav taws xob tsis kam vuam (ERW) yog hais txog ib pawg ntawm cov txheej txheem vuam xws li qhov chaw thiab seam welding uas tsim coalescence ntawm faying qhov chaw uas tshav kub los tsim cov vuam yog tsim los ntawm cov hluav taws xob tsis kam ntawm cov khoom ua ke nrog lub sij hawm thiab lub zog siv los tuav lub cov ntaub ntawv ua ke thaum vuam. Qee yam cuam tshuam rau cov cua sov lossis vuam kub yog qhov sib npaug ntawm cov khoom ua haujlwm, cov hlau txheej lossis tsis muaj txheej, cov khoom siv electrode, electrode geometry, electrode nias quab yuam, hluav taws xob tam sim no thiab lub sijhawm vuam ntev. Cov pas dej me me ntawm cov hlau molten yog tsim nyob rau ntawm qhov chaw ntawm cov hluav taws xob feem ntau (qhov sib txuas lossis "faying" nto) raws li cov hluav taws xob tam sim no (100–100, 000 A) yog dhau los ntawm cov hlau. Feem ntau, txoj kev siv vuam siv tau zoo thiab ua rau muaj kuab paug me me, tab sis lawv cov ntawv thov raug txwv rau cov ntaub ntawv nyias nyias thiab cov cuab yeej siv tau siab (txawm hais tias nyob rau hauv cov xwm txheej ntau lawm tus nqi ib weld yuav tsawg).
