Square tubes raug cais raws li lawv cov ntu ntu:

(1) yooj yim square tubes-square tubes thiab rectangular ncej square tubes;

(2) nyuaj square tubes-paj zoo li square raj, qhib lub qhov ncauj square raj, corrugated square raj thiab tshwj xeeb-zoo li tus square raj.Kev faib tawm ntawm cov hlau saum npoo kev kho ntawm galvanized square tubes: raws li kev kho mob saum npoo hlau, cov raj square tau muab faib ua kub-dip galvanized square tubes, phosphatized square tubes, oiled square tubes thiab pickling passivated square tubes.

Kev faib tawm ntawm kev siv tseem ceeb ntawm galvanized square tubes:Square tubes raug cais raws li lawv qhov tseem ceeb siv-square tubes rau kev kho kom zoo nkauj thiab tsim, cov khoom siv kho tshuab, qib qib square tubes rau cov khoom siv tshuab, cov raj square rau cov nroj tsuag tshuaj, cov qauv steel ncej, cov raj square rau kev lag luam shipbuilding, square tubes rau trolleys thiab square. cov yeeb nkab rau steel kem thiab kab teeb.

Kev faib tawm ntawm phab ntsa thickness ntawm galvanized square tubes:cov hlab ntsha yog cais raws li phab ntsa thickness-ultra-thin-walled lub raj, nyias-walled rectangular raj thiab tuab-walled rectangular raj.