Gu Chang-year construction process foundry ductile iron manhole cover: First check the wells, leading to the underground facilities, such as water supply, drainage, telecommunications, electricity, gas, heat, fire hydrants, valves, sanitation and other entrances. Manhole covers, inspection covers part of the closure, the bearings and covers components. Bearings, inspection covers the fixed part of the examination of the wellhead. Magnesite covers for placement. Covers, inspection covers are not fixed part. Its function is to check the wellhead closed, when the need to be able to open. Then, embedding depth, height carriage bearing surface to the top surface of the seat. Aperture gap, between the seat and covers. Bearing bearing surface, bearing covers the seat plane. Contact surface covers, seat covers bearing surface in contact with the plane. Finally, the inspection covers Jingkuan, bearing maximum aperture inscribed circle diameter. Test load when checking composite covers testing requirements applied load carrying capacity. Gu Chang-year foundry mainly produces ductile iron manhole covers, welcome to order! Gu Chang-year foundry ductile iron manhole covers range of applications: Water covers on the road, municipal wells, water wells Shanxi ductile covers size, telecommunications covers Shanxi ductile covers casting, China Unicom, mobile covers, thermal covers Shanxi ductile manhole covers, street manhole covers , fire, valves and even rainwater drainage grate Shanxi ductile materials are ductile iron manhole cover price, this material is ductile iron QT500-7 material, so that the product has a strong compressive, flexural, impact, heat, cold , abrasion, acid and alkali resistance, aging is not easy deformation characteristics. Welcome to buy our ductile iron covers! Address: Taigu County, State Road 108 towns Hu Dong village crossing. Shanxi Shanxi ductile covers size _ _ Chang in ductile foundry covers 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!