Gu Chang-year foundry teach you how to distinguish cast iron manhole covers and steel fiber covers: cast iron manhole cover is a metal cast iron or ductile iron manhole covers raw materials. Basically hundred percent is cast iron or ductile materials, and steel fiber covers are not. Gu Chang-year foundry tell you not cast iron covers steel fiber covers, which is a composite manhole cover, although it seems a bit like a cast iron manhole covers, there are a lot closer to the performance of the place, but in fact from the real difference between the metal material covers it far. Gu Chang share in foundry cast iron covers installation rules: In order to maintain the cover looks beautiful, clear fire covers surface pattern and writing the custom, when the asphalt pavement construction applications covering the thin metal covers or cover up waste oil, etc. Brush Fire covers plants, to prevent the oil sprayed on the asphalt covers; when fire covers cement road construction, application of plastic film will cover the fire covers factory covers to prevent contamination covers the surface of the cement mortar, damage the surface pattern, handwriting, can also finish the day construction When the water covers the surface clean. When installing cast iron manhole cover on the asphalt, construction machinery must be taken to avoid direct rolling wells seat, in the road the whole cast, and should be well on the road to reserve seat slightly larger than the hole in the asphalt Puwan placement. Fire covers plants, Chang-year foundry (certified), Taiyuan fire covers provided by Gu 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.