Underground fire hydrants are one of the important equipment in the urban fire protection system, they are usually made of ductile iron, stainless steel and grey cast iron.

1. Ductile iron underground fire hydrants
Ductile iron is one of the mainstream materials for underground fire hydrants. It has excellent corrosion resistance and pressure resistance, and is also relatively strong and durable.

2. Stainless steel underground fire hydrants
Stainless steel is a high-strength material with good corrosion resistance. Therefore, using underground fire hydrants made of stainless steel in some harsh environments can effectively extend their service life.

3. Grey Cast iron underground fire hydrants
Grey cast iron is hard and can be used under higher pressure, but its corrosion resistance is not as good as ductile iron and stainless steel.

ductile cast iron underground fire hydrant

This article is from our Dandong Foundry's Materials of Underground Fire Hydrants

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