Pipe Enlargement Calculator

Enter value and click on calculate. Result will be displayed.

θ = Angle of Approach      β = dminor / dmajor

Angle of Approach:
(Enter Angle Less than 180°)
β:
Rev / Minute
K value:

A Pipe Enlargement Calculator is used to determine the required dimensions for a larger pipe when transitioning from one pipe size to another. This could be used for pipe fittings, system design, or when optimizing flow rates in various piping systems.

To calculate the enlargement of a pipe, the following parameters are often considered:

  1. Initial pipe diameter (D1) – the diameter of the smaller pipe.
  2. Final pipe diameter (D2) – the diameter of the larger pipe.
  3. Flow rate () – the amount of fluid or gas passing through the pipes (usually in cubic feet per second or liters per second).
  4. Velocity of fluid (V1 and V2) – the speed of the fluid entering and exiting the pipes.

For an ideal fluid (incompressible and no friction loss), we often use the principle of conservation of mass (continuity equation), which states that the flow rate must remain constant across both pipe sections:

Q1=Q2

Where:

  • Q1 is the flow rate through the smaller pipe.
  • Q2 is the flow rate through the larger pipe.

This leads to the relationship between the velocities and cross-sectional areas of the pipes:

A1×V1=A2×V2

Where:

  • A1 and A2 are the cross-sectional areas of the small and large pipes, respectively. (Area is calculated as A=π×(D/2)2).

This formula can help you find the velocity or required pipe sizes when you have certain flow rates or need to adjust the pipe size.