Galvanized square pipe is widely used in construction, machinery, coal, chemical, railway vehicles, the automotive industry, roads, bridges, containers, sports facilities, agricultural machinery, oil machinery, mining machinery and other manufacturing industries. Galvanized square pipe is widely used in construction, machinery, coal, chemical, railway vehicles, the automotive industry, roads, bridges, containers, sports facilities, agricultural machinery, oil machinery, mining machinery and other manufacturing industries. Liaoning square tube. The maximum size of large-sized thick-walled cold-formed square and rectangular steel tube technology are square and rectangular steel pipe production line product is 500mm * 500mm * 19mm, the world's second. Nippon Steel the world's first 26 inches square and rectangular tube production line a maximum size of 550mm * 550mm * 22mm. Galvanized square tube. European and American countries are the largest size rectangular tube is 400 * 400 * 12.7mm. The maximum size of large-sized thick-walled cold-formed square and rectangular steel tube technology are square and rectangular steel pipe production line product is 500mm * 500mm * 19mm, the world's second. Square tube prices. Nippon Steel the world's first 26 inches square and rectangular tube production line a maximum size of 550mm * 550mm * 22mm. European and American countries are the largest size rectangular tube is 400 * 400 * 12.7mm. Liaoning square tube, around the steel joint, galvanized square tube price provided by the Tianjin Steel Trade Co., Ltd. Mastery. Liaoning square tube, around the steel joint, galvanized square steel pipe prices Tianjin Tongda Trade Co., Ltd. (www.tjtdgl.com) (www.tdglgt.com) this year introduced a new upgrade, the above picture is for reference only, please call Tel or pictures on this page, for the latest information, contact: Yanjing Li.