Ductile iron pipe will be in stock, factory direct, special wholesale and retail! Contact: Manager Hu metal cooled 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; DN100-1600mm centrifugal ductile iron pipe technology and equipment through the National New Products Machinery Bureau, the new technology achievement appraisal; epoxy ceramic-lined ductile iron pipe and technological achievements by the Ministry of Construction Organization assessment, the technical indicators have reached the US testing standards, the export volume to fill the gap; ductile iron pipe for China Urban Water Supply Association, China Gas Association recommended products. Centrifugal ductile iron pipe in 2002 won the national quality metallurgical products 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, ductile iron pipe specifications --- Spot T-interface specifications for pipe, ductile iron pipe, ductile iron pipe Daquan T----- intrinsically ductile iron pipe, high performance, corrosion resistance of steel, good ductility easy to install, is mainly used for municipal, industrial and mining water, gas and so on. The main components 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, the minimum elongation of 7%. Ductile iron pipe performance standards GB / T13295-2008 ISO2531 / 2008. Centrifugal ductile iron pipe DN100 DN200 DN300 DN400 DN500 DN600 DN700 DN800, DN100-DN800 rubber seal ring (22.5 °, 45 °, 90 °) socket elbow bent double bearing, bearing plate short tube, insert the disc short tube, tee such as the choice of ductile iron pipe, for the purchaser is very important, because ductile iron pipe is now widely used in water supply, if you purchase poor quality ductile iron pipe, it not only affects the progress of the project, if a serious the consequences of breaking the law will bear the corresponding legal responsibility. So first brief performance on ductile iron pipe line. Ductile iron pipe performance: cast iron pipe, ductile iron pipe is an important class classification, ductile iron pipe is an alloy of iron, carbon and silicon. Nodular graphite is present in the form of spherical graphite free, so nodular cast iron, spheroidal graphite eliminate this destructive effect, make it tough. Ordinary graphite size 6-7, requires casting the ball to the 1-3 grade level control (ball rate ≥80%) on the quality of the mechanical properties of the material itself and thus get a better improvement, with iron essence, the performance of the steel. Annealed ductile iron pipe, the microstructure of ferrite and a small amount of pearl physical, mechanical performance has been greatly improved. Contact: Manager Hu and prices are subject to change due to the material, but the full range of our products, a variety of sizes and materials, online inconvenient enumerate, please call us to confirm the price, material, type, size and number of the seller before buying