RHS weight formula: 4 * thickness * (side length - wall thickness) * 0.00785 circular pipe weight formula :( circumference ÷ 3.14) - thickness} * thickness * 0.02466 Note: The above unit is kg / m wherein the wall thickness and edge length in millimeters, ie mm. Since July, the domestic steel market is still low in shock. Despite the recent decline in steel prices continue to slow down, pull up a tentative situation shipments increased, but practical terms q345 large diameter pipe, the current demand is still difficult to show substantial recovery in the pipe, it is difficult to oversupply improvement. Insiders pointed out that cold-drawn tubes, further pick up small-diameter Rectangular Pipe City needs to be a substantial improvement in supply and demand, post-market supply pressure is still large, in a short time to pick up the small-diameter Rectangular Pipe lack of supply and demand side of the support. Ma'anshan square tube | 80 square tube | Fair Commerce Bo (certified merchants) are provided by the Hefei exhibition Bo Trading Company. Ma'anshan square tube | 80 square tube | Fair Commerce Bo (certified merchants) Hefei Show Bo Trading Company (www.hfzhanbo.com) (www.hfzhanbo.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: Mr. Huang.