Continue pressing environmental policy. Currently, the 2.5 square tube, MEP issued "Beijing, Tianjin and the surrounding areas of air pollution in key industries deadline governance program" and demanded Beijing, Tianjin and surrounding areas 492 companies, 777 production line or unit in 2015 and completed the rectification compliance, Hefei square tube, the total emissions of major air pollutants dropped more than 30 percent over 2013. The correction relates to the electricity, steel, cement, plate glass four sectors. To this end, q235b square tube manufacturers, local governments will strengthen environmental pollution, environmental protection facilities in Hebei small steel lacks more, and environmental pressure will increase its operating costs, q235 welded pipe, while banks have tightened lending the larger environment, some mills will shut down due to funding strand breaks occur, the future of small-diameter thick-walled square tube production, or to decline. Development History edit the first phase (1904- 1934) in this period MPM technology is not mature. The second phase (1934- 1950) and even a floating mandrel square tube technology mature period. The third phase (1961- 1978), the floating core holding Pipe Mill at the height of the fourth phase (1978- 1992), a total of 11 sets of the world's big stopper (MPM) and two sets of semi-stopper formula (MRK) MPM to form plants. Hefei square tube _ exhibition of Commerce Bo _q235b square tube manufacturers supplied by the Hefei exhibition Bo Trading Company. Hefei square tube _ exhibition of Commerce Bo _q235b square tube factory in 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 dial this page Phone or pictures on obtain the latest information, contact: Mr. Huang.