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Nodular cast iron manhole cover installation and commissioning plan and related instructions

Many users think that the installation of ductile iron manhole covers is very simple. In fact, this understanding is incorrect. Although the installation of ductile iron manhole covers is not very complicated, it must be carried out carefully according to the standard.
08 2019/06
Nodular cast iron manhole cover installation and commissioning plan and related instructions

How to improve the quality of the square ductile iron manhole cover?

In order to prevent the uneven contact surface between the manhole cover and the well circle, causing impact noise when the car is driving, a flexible cushion is installed between the manhole cover and the well frame to provide fire-fighting impact noise. Or the contact surface of the well cover and the well frame is matched by mechanical processing (only for round products), and the matching is smooth.
05 2020/01
How to improve the quality of the square ductile iron manhole cover?

The characteristics of cast iron inspection manhole cover and its scope of application and construction requirements

The scope of use of inspection manhole covers: heavy-duty ductile iron manhole covers are used on the asphalt roads of the park; general, polymer-based composite inspection manhole covers are used on motor vehicle roads in the park that require paving;
06 2020/01
The characteristics of cast iron inspection manhole cover and its scope of application and construction requirements
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