[Chinese Manhole Cover] What are the classifications of manhole cover materials?

Well cover materials are divided into concrete structure sewer covers, cast iron cover plates, polymer materials and other new raw materials, stainless steel plate invisible rear cover plates, etc.

Concrete structure manhole cover

Using chemical fiber concrete as a routine, using the high-quality anti-strike, impact resistance, and fatigue-relieving properties of concrete fiber concrete and the tendency of two-dimensional distribution of concrete fiber concrete in thick-walled prefabricated components, and adding appropriate building steel bars, The outer frame is made of glass fiber reinforced plastic for anti-corrosion, and it is produced and processed with care.

cast iron cover

Good ductility, strong corrosion resistance, water erosion test, 90 days of corrosion is only 1/40 of the seamless steel pipe, is 1/10 of the gray galvanized pipe. The service life is twice that of gray galvanized pipes and five times that of ordinary seamless steel pipes. Good plastic deformation, tensile strength ≥ 7%, similar to medium carbon steel, and gray iron raw material tensile strength is zero.

Polymer Materials

The resin manhole cover adopts ultra-high pressure one-shot molding technology, with high degree of polymerization, high density, excellent impact resistance and tensile strength, and has the advantages of wear resistance, corrosion resistance, no rust, zero pollution, and maintenance-free.

stainless steel plate invisible

2 Features: Anti-theft! And beautiful and generous. It is the one with the most applications in landscape gardening at this stage. When choosing this kind of material as the manhole cover, the following problems must also be considered: the manhole cover must ensure the stiffness and prevent corrosion, and the stiffness of the external laying selection is not enough;