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. Ductile iron pipe is mainly known as ductile iron pipe drainage ductile iron pipe fittings, it has the nature of iron, high performance, corrosion resistance of steel, good ductility, good sealing effect of drainage ductile iron pipe fittings, easy to install, mainly for municipal , industrial and mining water, gas, oil, etc. Is the preferred water supply pipe, with a high cost. Inner and outer bearing pressure better drainage Guiyang ductile iron pipe, from the installation time, ductile pipe easier and faster than the PE pipe installation and post-installation compared with PE pipe; tightness and corrosion resistance from the point of view, closed ductile pipe after installation better drainage ductile iron pipes, corrosion resistance can be improved through a variety of means of corrosion; from the hydraulic performance point of view, due to ductile pipe specification generally refers to the inside diameter, PE pipe size generally refers to the outer diameter, the same size as under conditions of ductile pipe can achieve greater runoff; from a comprehensive installation and maintenance costs, the ductile pipe has a more favorable price. The main components of ductile iron pipe with carbon, silicon, manganese, sulfur, phosphorus and magnesium. The inner wall of spray zinc, anti-corrosion materials, such as cement mortar. Drainage ductile iron pipe fittings | virtues of Industry (certified) | Drainage 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.