Welded steel yeeb nkab: Ib lub yeeb nkab steel nrog ib txoj hlua khi rau ntawm qhov chaw ntawm lub steel sawb los yog steel phaj uas yog khoov thiab deformed rau hauv lub voj voog los yog ib lub voj voog. Sab hauv phab ntsa ntawm cov yeeb nkab welded muaj vuam ribs. Cov khoom tseem ceeb muaj xws li: ERW steel yeeb nkab, LSAW steel yeeb nkab thiab SSAW steel yeeb nkab. Cov yeeb nkab steel yog ib hom hollow ntev steel, uas yog siv los ua cov kav dej xa dej, xws li roj, nkev, dej, roj, nkev, thiab lwm yam.