k9 grade ductile iron pipe T-interface of urban water supply ductile iron pipes water pipes GB K9 grade cast iron pipes with zinc price T-ductile iron pipe, ductile iron pipe, ductile iron pipe specifications specifications --- Spot k9 grade / T-interface for ductile pipes cast iron pipe. K9 grade ductile iron pipe (Ductile Cast Iron Pipes) k9 is a wall thickness of grade standards, 9 is a factor. e = k × (0.5 + 0.001 × DN) e is the thickness of new ductile iron pipe plant, DN is the nominal diameter cast iron pipe centrifugal minimum wall thickness of 6mm new ductile iron pipe, cast iron pipe fittings of non-centrifugal and minimum wall thickness of 7mm. e = K (0.5 + 0.001DN) where: e - standard wall thickness, mm; DN - nominal diameter, mm; K - grade wall thickness factor, taking a series of integers: 7,8,9,10, 11, 12 ... Liaocheng virtue Pipe Co., Ltd. ductile iron pipe is ideal for the urban water supply pipe, gas pipe network, set high strength, ductility, and corrosion resistance strong advantages, with the nature of iron, steel performance in emerging ductile iron pipe specifications, is the traditional cast iron pipe and ordinary steel replacement products; the main component of ductile iron pipe with carbon, silicon, manganese, sulfur, phosphorus and magnesium. On the ferrite and pearlite matrix distributed a certain number of spherical graphite, different caliber and in accordance with the requirements of the elongation of the nominal ratio of the matrix structure of ferrite and pearlite different, small-diameter ratio of pearlite generally not more than 20%, large diameter generally controlled at about 25%. Minimum tensile strength: 420 / Mpa, minimum yield strength 300 / Mpa new ductile iron pipe company, the minimum elongation of 7%. Ductile iron pipe performance standards GB / T13295-2008 ISO2531 / 2008. Water-cooled metal mold centrifugal ductile iron pipe production technology and equipment in 1994 through the national scientific and technological achievements; ductile iron pipe year 1994 was named national new products; ductile iron pipe in 2002 by the National Metallurgical Product Quality Gold Award. Products undergo rigorous composition analysis, metallurgical testing, dimensional inspection, surface quality inspection, pressure ring test, tensile testing, hardness testing, hydrostatic testing, leak test, the thickness of the lining and the outer coating, such as quality inspection. All of the above test items qualified factory rear granted. GB ductile iron pipe specifications --- k9 grade ductile iron pipe specifications Spot / T-interface to the water pipes, ductile iron pipe Daquan --- GB T-k9 grade ductile iron pipe, ductile iron pipe ---- nature has iron, steel performance, excellent corrosion resistance, ductility good, easy to install, mainly for municipal, industrial and mining water, gas and so on. New ductile iron pipe specifications _ _ Binzhou emerging virtue Pipe Ductile Iron Pipe Co., Ltd. Liaocheng by virtue of Industry. Liaocheng virtue Pipe Co., Ltd. (www.meidegc.com) (www.meidegc.com) (www.mdwfg.com) (www.mdggc.com) Shandong Liaocheng, steel leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Industry leaders in the United States and Germany with the staff warmly welcome all inquiries negotiations to create the virtues pipe industry a better future.