Gu Chang foundry in Brief covers the two most important parameters are with you. The two most important parameters of the covers for the hardness and toughness. In general, the higher the hardness, the better the quality, but high hardness, and toughness but also good, this is good covers. Gu Chang-year foundry remind you, when designing a circular cast iron covers wholesale, in addition to determining the geometry of the cast iron manhole covers, according to the working conditions and the size of the metal material properties, it must also come from the perspective of casting alloys and casting characteristics design is reasonable to consider that the apparent size of the effect and solidification shrinkage, stress and other issues, in order to avoid or reduce the cast iron covers of segregation, resulting in deformation of the circular cast iron covers companies, cracking and other defects. Gu Chang foundry located in Shanxi Province, Taigu County towns Hu Dong village crossing State Road 108. 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 such covers are rolled circular cast iron covers from the manufacturers, it is easy to fall into wells diagonally wellhead, causing a safety hazard. If the wellhead or significantly less than the covers made of round, square manhole cover 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 efficient, but to make cast iron manhole cover price increases . Gu Chang-year foundry mainly produces all kinds of manhole covers. Welcome to buy! Round cast iron covers offer, Changzhi round cast iron manhole covers, Chang-year 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!