Gu Chang-year foundry cast iron manhole covers with you why are generally circular? The reason for using a circular cast iron covers can reverse thrust out from the negative point of the square cast iron covers. If square, because it is significantly longer than the diagonal of the square each side, when the covers are rolled from such Taigu covers, it is easy to fall into the wells diagonally wellhead, causing a safety hazard. If the wellhead covers made of round or significantly less than the price of Taigu covers, square covers will not fall into the well. Wellhead wellhead use depends on the size, If you have to install an area much larger than the above wellhead square manhole cover, then the use of natural materials and practical value does not directly use the circular covers more effective Taigu covers wholesale, but to make cast iron manhole cover price increases. Gu Chang-year foundry mainly produces all kinds of manhole covers. Welcome to buy! 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. Taigu covers Quote | Taigu covers | Chang in foundry provided by Gu Chang in foundry. Gu Chang-year foundry (www.sxcnzz.com) strong, credible, in Jinzhong machining industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Chang and you work in the foundry into the brilliant, for a better future!