Gu Chang-year foundry mainly produces ductile iron covers. Ductile iron manhole covers mainly build out of the covers from Shanxi ductile covers, which covers their quality would involve the issue of the rate of the ball. Treatment is anti-rust paint castings used asphalt paint, of course, ductile iron manhole cover surface is asphalt paint after spraying anti-rust treatment. Ductile iron manhole cover has an advantage in Shanxi ductile cast iron manhole covers, ductile iron is due to the high strength, good toughness, making ductile than covers the same type of gray cast iron manhole covers around 30% lighter. Gu Chang-year foundry ductile iron covers features: (1) decorative effect, choice of color, you can design and strong. Products can be made into a variety of covers given different shapes and purposes. (2) resistance, high / low temperature, insulation, good corrosion resistance. Products at low temperature -40 ℃, 250 ℃ high temperature in normal use, does not affect performance. Product is electrically insulating covers Grate Shanxi ductile, corrosion resistant ductile Shanxi covers mold, never rust. (3) easy to open, no harsh noise. Product is not lockable covers, easy to harsh noise and no rebound phenomenon open when the car ran over. Ductile iron covers features! Welcome to buy! Shanxi ductile covers Grate, Chang-year foundry (certified), Shanxi Taigu ductile manhole cover provided by Chang in foundry. Gu Chang-year foundry (www.sxcnzz.com) is Jinzhong, machining leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Chang-year leadership in the foundry staff warmly welcome all inquiries negotiations to create Chang foundry in a better future.