Taigu Chang in foundry double ductile covers features: flush with the road surface, the convergence of underground facilities inspection covers, the structure of the upper and lower layers a cast iron covers. This standard specifies the technical requirements for underground facilities Manhole double manhole covers, test methods, inspection rules. This standard applies to urban roads, highways and other motor vehicle or motorcycle may be with or manholes covers parked on the ground. Manhole covers main cover material shall comply with GB / T1348-1988 of. Sub cover should be non-metallic materials. Sub cover the manufacture of glass steel materials should be used. Taigu Chang in foundry can do: 1, in order to prevent the contact surface Manhole covers and uneven, causing the car with impulse response between the covers and the well block mounting flexible cushion Shanxi cast iron covers prices, fire impact sound. Or covers the well block the contact surface by mechanical processing facilities (only round products) Shanxi cast iron covers much money, with the smooth. 2, in order to prevent the covers installed outdoors was stolen, can be equipped with locks on covers, said locking means simultaneously, to form a complete anti-theft device. Shanxi cast iron covers prices of foundry Chang (certification), cast iron covers by Taigu Shanxi 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.