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offers a wide variety of q345b square pipes for heavy-duty purposes. These sturdy q345b square pipes are available at affordable deals and pricesGalvanized Square and Rectangle steel Tube Hot DipAug 18, 2017 · Product Name:Hollow section steel pipe square and rectagule. Material :Q345B. Galvanized coated. Size:350 300 250 mm. Length:6~12 m. Certificate:ASTM ISO BV SGS. Email :[email protected] Tel/app:86-15230761613 . Factory Sales Galvanized Square and Rectangle Steel Pipe. Standard:ASTM A500, ASTM A53, EN 10210 ,EN 10219 ,JIS G 3466 ,BS 7, BS