Welded steel pipe welded steel blanks is optional steel or steel pipe, welding technology is not the same because it is divided into stove pipe, welded (ERW) pipe and active arc welded pipe. Because welding is not the same as two divided Longitudinal and spiral welded pipe. Its end shape is divided into circular pipe and shaped (square, flat, etc.) pipe. Pipe material and its use is not the same and is divided into the following varieties: GB / T3091-1993 (low pressure liquid delivery galvanized welded steel pipe). Mainly used for transporting water, gas, air, oil and heating hot water or steam is typically low pressure fluid and other useful tube. Which represents raw material Q235A grade steel. GB / T3092-1993 (low pressure liquid delivery galvanized welded steel pipe). Mainly used for transporting water, gas, air, oil and heating hot water or steam is typically low pressure fluids and other useful tube. Which represents raw material: Q235A grade steel. GB / T14291-1992 (mine fluid delivery welded steel pipe). Mainly used for mine air pressure, drainage, gas discharge shaft with a straight seam welded steel pipe. Which represents raw material Q235A, grade B steel. GB / T14980-1994 (low pressure fluid delivery with a large diameter welded steel pipe). Mainly used for transporting water, sewage, gas, air, steam heating and other low pressure fluids and other uses. Which represents raw material Q235A grade steel. Small-diameter thick-walled square tube market is high-yield outstanding problems and weak demand. The current high yield market. Tangshan production profiles of enterprises up to more than 200 hot-rolled tube, the high level of steel production in the first half of the bullish market expectations, the operating rate of more than 98%, an increase of about one percent over last year, has not entered July See press signs production. At the same time, demand is difficult to show substantial recovery. Buying second half pipe, real estate investment is expected to continue to decline, become an important factor limiting demand for steel. In addition, the manufacturing sector is also not out of the production season. Square tube suppliers, exhibition of Commerce Bo (certification), Hefei square tube provided by the Hefei exhibition Bo Trading Company. Square tube suppliers, exhibition of Commerce Bo (certification), Hefei, Hefei exhibition tube Bo Trading Company (www.hfzhanbo.com) (www.hfzhanbo.com) this year introduced a new upgrade, the above picture is for reference only, please You call Tel picture on this page or to obtain the latest information, contact: Mr. Huang.