The cold galvanized square tube on the side of the tube is used in principle to the use of cold galvanized square pipes with anti-corrosion properties. And hot-dip galvanizing cold galvanizing paint a different principle primarily through electrochemical corrosion protection, it is necessary to ensure full access to the pipe factory zinc and steel, generating electrode potential difference, so the steel surface treatment is very important. Data show that in mid-April the country estimated 2,005,200 tons crude steel output side of the pipe network, the average daily production 25,600 tons. But by analyzing the output of various types of steel changes in the pipe, found the largest decline in output is railway timber, heavy rail, plate square tube specifications table, as well as the thick wide strip, and rebar, wire rod, hot rolled steel sheet width band, cold-rolled, galvanized and other common types of circulation mall, still insist on added value. Reflected in the data that is slow season destocking effect. To the end of April, the nation's major cities rebar inventories of 7,512,700 tons, compared with the same period of the previous year, adding 1,516,100 tons, an increase of 24 percent, and early March 2011 stock peak (7.73 million tons) decreased slightly compare , output growth is still too fast mainly due to increased inventory. Square tube specifications table _ Fair Commerce Bo (certified) _ Hefei square tube provided by the Hefei exhibition Bo Trading Company. Hefei Show Bo Trading Company (www.hfzhanbo.com) is Hefei, steel leaders, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the exhibition of Commerce Bo leadership with the staff warmly welcome all inquiries negotiations to create the exhibition of Commerce Bo better future.