Problem:
The following is displayed when using AutoPIPE
* * * W A R N I N G - MODEL * * *
W2261-117: B31 App J: Header diameter or thickness is not maintained for at least two header
pipe mean diameters, on one/both side(s) of the branch centerline, for the tee(s)
below. Set the tee type of these tee(s) to 'Other':
Why and how to avoid it?
Solution:
This warning refers to a specific clause in ASME B31.J code related to tees. Find type of component in table 1-1 (Flexibility and Stress Intensification Factors), and refer to the various notes that apply. One of these notes clearly states,
" The matching run pipe thickness, T, and diameter, D, are maintained for at least two run pipe diameters..."
Avoidance:
Update the modeling so that nothing interferes with header required distance of 2 pipe outside diameters from centerline of branch on header.