Difference Between Np2 and Np3 Pipes

As per IS 458 2021, NP2 and NP3 Pipe difference is defined as:

NP2 Hume Pipes: Reinforced concrete, light duty, non-pressure spun/vibrated pipes. Suitable for drainage and irrigation use, for cross drains/ culverts carrying light traffic.

NP3 Hume Pipes: Reinforced concrete medium duty, non-pressure pipes. Suitable for drainage and irrigation use, for cross drains/ culverts carrying medium traffic.

 

Read Also: RCC Pipe Manufacturing Process.

Difference between NP2 and NP3 Hume pipes

The primary difference between NP2 and NP3 Hume pipes lies in their load-bearing capacity and structural strength. Here’s a breakdown of the differences:

Load-Bearing Capacity:

NP2 RCC pipes are designed to withstand lighter loads, making them suitable for applications with low to moderate traffic or where the soil conditions are less demanding. On the other hand, NP3 Hume pipes are built to handle heavier loads and are commonly used in areas with high traffic volumes or where the soil conditions require a stronger pipe.

Wall Thickness:

RCC pipes NP2 Class typically have a thinner wall compared to NP3 Class Hume pipes. The increased wall thickness in NP3 pipes contributes to their higher strength and load-bearing capacity. For 80MM Dia to 2200MM Dia, Wall Thickness of NP2 pipes vary from 25MM to 110MM whereas for NP3 Pipes it varies from 25MM to 185MM.

Reinforcement:

NP3 Concrete pipes have more reinforcement as compared to NP2 Pipes, such as steel cages or wire mesh, embedded within the pipe walls. This reinforcement enhances the structural integrity and load-bearing capacity of the pipes.

Durability:

RCC NP3 Class pipes are more durable and longer-lasting than RCC NP2 Class pipes. They have a higher resistance to corrosion, abrasion, and other forms of wear and tear, making them ideal for harsh environments or heavy-duty applications.

Cost:

While RCC Hume NP2 pipes offer cost-effective solutions, RCC Hume NP3 pipes come at a higher price due to their enhanced strength and durability. The increased cost is justified for applications that demand superior load-bearing capacity and longer service life. Check out RCC NP3 and RCC NP2 Pipe rates.

Application:

NP2 Hume pipes are commonly used for drainage systems, irrigation networks, and culverts that experience lighter traffic or lower soil pressures. NP3 Hume pipes, with their higher strength, are suitable for applications that require the pipes to withstand heavy vehicular loads, such as highways, major roadways, and industrial areas.

In summary, NP3 Class Hume pipes are stronger, more durable, and better suited for Medium-duty applications than NP2 RCC Cement pipes. The choice between the two will depend on the specific needs of the project and the load-bearing requirements of the application.

Learn more: hume pipe testing.

Check out complete specifications of NP2, NP3 and NP4 Hume pipes for better comparison between them.