Lateral Hole

For stub in type branch, we have to consider ID of header and OD or branch. So the input data is as follows:

1. Header pipe ID : 273 mm – (2 *9.27mm) = 255.46  i.e. 255 mm approx.
2. Branch Pipe OD : 168.3 mm i.e. 168 mm approx.

168.3x3.14~528

528÷16=33