Bastard Flanges???
Bastard Flanges???
(OP)
I need to install 16 inch line, class 300, with two "interesting" engineereed changes in line direction. At each location, the line is to be given a change in azimuth of approx l3 degress, as well as a change in slope of approx 3%. Governing code is B31.3.
I cant see any way of doing this without some field fitting/ welding. Are there bastard flanges available to facilitate this type of exercise or do the welders have to use their ingenuity??
This is probably a no brainer for experienced pipers but its a bit new to me. Thanks in advance.
I cant see any way of doing this without some field fitting/ welding. Are there bastard flanges available to facilitate this type of exercise or do the welders have to use their ingenuity??
This is probably a no brainer for experienced pipers but its a bit new to me. Thanks in advance.





RE: Bastard Flanges???
RE: Bastard Flanges???
You could use a Long Radius Elbow to cut your odd angle. I haven't laid it out but you could possibly get three elbow from one LR elbow.
Here is one of several books out there that have the information on how to do this.
http://www.pipefitter.com/existing_php/PTPM.php
Several other books.
ht
RE: Bastard Flanges???
RE: Bastard Flanges???
RE: Bastard Flanges???
"Intersting things" done with blind flanges in ASME B31.1 systems have been addressed in the B31.1 Code Cases
The angled hole through the face of a blind flange is not permitted.
-MJC