Product performance standards: GB / T3094-2000 (GB) cold-shaped rectangular tube GB / T6728-2002 (GB) Cold formed hollow sections ASTMA500 (ANSI) structural carbon steel cold forming circular section and profiled??? rectangular cross-section welded pipe and seamless rectangular tube EN10219-1-2006 (European standard)? cold formed welded structural hollow sections of non-alloy and fine grain JIS of? G? 3466 (Japanese standard) general construction with angle rectangular tube Rectangular wall thickness tolerances, galvanized pipe, when the wall thickness of not more than 10mm nominal thickness not exceeding plus or minus 10 percent, Hunan square tube, when the wall thickness greater than the wall thickness of 10mm plus or minus 8%, stainless steel except pipe, bend and weld thickness region. Rectangular Pipe wall thickness tolerances, the pipe price, when the wall thickness of not more than 10mm nominal wall thickness shall not exceed plus or minus 10%, when the thickness of the wall thickness greater than 10mm plus or minus 8 percent, corners and welding except the seam area thickness. Hunan square tube _ _ galvanized steel joint Mastery square tube prices from Tianjin Steel Trade Co., Ltd. Mastery. Hunan square tube _ _ galvanized steel joint access square around the steel pipe prices Tianjin 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.