Igwe anaghị agba nchara square tube bụ oghere nke ígwè, n'ihi na akụkụ ahụ bụ square nke a na-akpọ square tube.Ọnụ ọgụgụ dị ukwuu nke pipelines eji ebufe mmiri mmiri, dị ka mmanụ, gas, mmiri, gas, uzuoku, wdg, na mgbakwunye, na-ehulata, torsional ike n'otu oge ahụ, ìhè arọ, n'ihi ya, a na-ejikwa ya n'ọtụtụ ebe. mmepụta nke n'ibu akụkụ na engineering owuwu.