Ministry of Construction, "2000 Progress urban water development plan" K9 ductile iron pipe, city water pipe DN300mm-DN1400mm, is recommended mainly spherical cast-iron pipe, cast-iron ball to determine the specification section of pipe as a future major urban water supply networks pipe. In the production of this type of cast-iron pipe, ductile iron pipe ball, according to the "hot metal purification" theory, the use of modern hot metal purification technology, to obtain a more pure quality hot metal, within plus or minus tolerance national standards to produce qualified parenchyma high-strength cast-iron pipe ball, the ball is both important way to increase the profits of cast-iron pipe manufacturer, but also to make their products with a relatively high-end technology, resulting in fierce competition in the market, certain to win. Ductile iron pipe is mainly known as ductile iron pipe, which has the nature of iron, high performance, corrosion resistance of steel, ductility, good sealing effect, easy to install, mainly used for municipal, industrial and mining water, gas, transport oil. Is the preferred water supply pipe, with a high cost. Compared with PE pipe, from the installation time, ductile pipe is easier than PE pipe installation quick and better bearing pressure inside and outside the installation; from tightness and corrosion resistance point of view, ductile pipe tightness better after installation, but also through a variety of means to improve the corrosion resistance of corrosion; from the hydraulic performance point of view, due to ductile pipe specification generally refers to the inner diameter, PE pipe size generally refers to the outer diameter, the same size as under conditions of ductile pipe can achieve greater runoff; from Comprehensive installation and maintenance costs, the ductile pipe has a more favorable price. Inner wall spray zinc, cement mortar anticorrosive materials. Ductile iron pipe using a water-cooled metal de la Executed centrifuge mold .Dg100mm less use of closed jacket cooling DN200 ductile pipe, Dg150rnm mold all over with rain cooling. Pouring stream need to join calcium alloy plant inlet end for inoculation, after each casting is completed, the need in the mold surface with a thin layer of dry air spray CaSi powder, a centrifuge is the upper and lower halves closed housing unit consisting of a wheel frame supporting the mold mounted on the bottom of the housing Shandong ductile iron pipe, mold the front cover with the ring gear, mounted on the housing bottom of the DC drive motor through direct drive gear mold, Hugh shell mold through at both ends are equipped with seals, housing attached to the tip of a mountain of semi-circular cylinder flip sound full rae centrifuge housing with wheels below to reciprocate on an inclined track, centrifuges reciprocating hydraulic system, the pressure is 9.65x105Pa. its speed through the relief valve adjustment, centrifuge cables and cooling water out of the hose is generally fixed on the pole next to the machine and the other end on the housing together random Mobile. Centrifuge production specifications are generally fixed, if you want to produce several sizes on a single centrifuge tube, replace the fan package, iron water plant and supporting the mold roller racks. Ductile iron pipe is a cast iron is an alloy of iron, carbon and silicon. Ductile iron is spheroidal graphite form, usually graphite size of 6-7, requires casting on the quality control of the ball grade 1-3 level (ball rate ≥80%), and thus the material itself machinery improved performance has been good, with the nature of iron, steel performance. Annealed ductile iron pipe, the microstructure of ferrite and pearlite, good mechanical properties. Ductile iron pipe water supply _ virtue of Industry (Online) _ ductile iron pipe is provided by virtue Liaocheng Industry Co., Ltd. Liaocheng virtue Pipe Co., Ltd. (www.meidegc.com) (www.meidegc.com) (www.mdwfg.com) (www.mdggc.com) Shandong Liaocheng, steel leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In virtue tube industry leadership with the staff warmly welcome all inquiries negotiations to create the virtues of Industry a better future.