Repad Diameter

To proceed a pipe branch connection, a lot of data are missed such as:

- Pipe & branch material and grade

- Design pressure

- Design temperature

- Allowable tensile strength of both run & branch

- Select which code of ASME B31 you will apply

And proceed such reinforcing calculations to find the following areas (as per ASME B31.3):

A₁ = t_h d₁ (2 − sin ß)

A₂ = (2d₂ − d1)(T_h − t_h − c)

A₃ = 2 L₄ (T_b − t_b− c) ⁄ sin ß

Where:

d₁ = [D_b − 2 (T_b − c)] ⁄ sin β

d₂ = d₁ or (T_b − c) + (T_h − c) + d₁/2, whichever is greater, but in any case not more than D_h

L₄ = 2.5(T_h − c) or 2.5(T_b − c) + T_r, whichever is less

Then, make sure that :
A₂ + A₃ + A₄ ≥
A₁