Manhole covers through continuous development for decades, overall performance is close to steel, is based on this excellent performance, have been successfully used to cast some of the bearing capacity of the complex, the strength and toughness, wear resistance requirements are more parts. Taigu Chang foundry specializing in the production of ductile iron manhole covers and cast iron rainwater grate double ductile covers, welcome to order! Taigu Chang share with you in foundry ductile covers conservation method: the presence of Manhole covers and seat covers ductile quality problems or improper use, lightweight manhole cover on the sidewalk as applied to heavy covers used on roadways in a double-ductile covers manufacturers so Manhole covers damage to its components, further force transmission to Manhole covers surrounding pavement. The degree of damage to the surface layer integrity and stability little or no impact double ductile covers processing, but the larger impact appearance. Covers after installation, an endless stream of passing vehicles on the road, when the wheel after a long time that some "usage" covers a relatively high crack and collapse, this happens, the first to confirm what the basis is not solid, if inadequate foundation requires strengthening it, and then apply a layer of cement to make the necessary reinforcement covers the surface of the appropriate sprinkle some salt when the cement paste and covers more firmly around, so easy to fall off. Double ductile covers Quote | Chang in foundry (certified) | Taiyuan double ductile covers provided by the Taigu Chang in foundry. Taigu Chang in foundry (www.sxcnzz.com) is Jinzhong, machining leaders, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Chang in foundry leadership with the staff warmly welcome all inquiries negotiations to create Chang foundry in a better future.