Why in city roads it is necessary to use cast -iron lids of wells with spherical graphite? 

Why in city roads it is necessary to use cast -iron lids of wells with spherical graphite?

One 、 excellent mechanical properties

1. Eye strength and bearing capacity: tensile strength (≥420 MPa) and fluidity (≥300 MPa) significantly exceed ordinary cast iron. It withstands a load up to 500 kN, which prevents deformation even under a pressure of 36 tons.

2. Plasticity:

Extension ≥7% provides resistance to shock loads and temperature differences, which is critical of regions with a harsh climate.

Two 、 Durability and low service costs

1. Corrosive resistance:

The service life exceeds 30 years due to resistance to chemicals and moisture, while composite analogues are degraded over 10 years.

2. Minimum service:

Bitumen or zinc coating reduces the need for repairs, which saves the city budget.

Three 、 Safety and functionality

1. Protection from theft and displacement: the design with locks and anchor bolts excludes the theft, and the anti -slip ledges record the situation.

2. School -pressure and protection against falling: special gaskets reduce noise, and the nets withstand extreme loads.

3. Enthusiastic and visibility:

The textured surface and reflective coating increase safety in the dark and in bad weather.

Four 、 Economic and environmental friendliness

The long service life and low repair costs compensate for the initial investment.

2. Ecologism:

The complete processing of the material reduces the carbon trace, unlike composite analogues.

Five 、 standardization and versatility

1. Release with standards:

Thickness and strength are regulated by national and international norms.）

2. Universality:

Suitable for zones with intensive movement and complex operating conditions.）

Conclusion

Cast iron lids with spherical graphite are the optimal solution for urban infrastructure. Their implementation not only increases safety, but also contributes to the sustainable development of cities.