Rectangular yeeb nkab yog ib hom hollow square seem lub teeb nyias-walled steel yeeb nkab, tseem hu ua steel tub yees khoov seem. Nws yog ib feem steel nrog square cross-section duab thiab loj ua los ntawm Q235 kub dov los yog txias dov sawb los yog coil raws li lub hauv paus khoom, uas yog tsim los ntawm txias dabtsi yog khoov thiab ces high-frequency vuam. Tsuas yog rau cov phab ntsa tuab, lub kaum sab xis loj thiab ntug flatness ntawm kub-dov-thick-walled square tube ncav cuag los yog ntau tshaj qhov kev tiv thaiv welded txias-tsim square raj. Kev faib tawm ntawm cov kav dej sib npaug: cov kav hlau tau muab faib ua cov kav hlau tsis sib haum thiab cov kav hlau welded (cov kav dej sib txuas) cov kav dej kub dov seamless square kav, txias rub seamless square kav, extruded seamless square kav, thiab welded square kav.