Large diameter penstock branch design
Large diameter penstock branch design
(OP)
Hello
I'm looking into the design of large diameter branch (59")off a 120" penstock with an internal pressure of 50psi. I'm having trouble finding a suitable guide for calculating the stresses at the branch/penstock interface.
We are planning to use do some FEA but I would like something to back it up. I've looked into using the WRC 107/297 bulletins but I don't think they are very accurate for such large d/D ratios (.49).
Any suggestions?
I'm looking into the design of large diameter branch (59")off a 120" penstock with an internal pressure of 50psi. I'm having trouble finding a suitable guide for calculating the stresses at the branch/penstock interface.
We are planning to use do some FEA but I would like something to back it up. I've looked into using the WRC 107/297 bulletins but I don't think they are very accurate for such large d/D ratios (.49).
Any suggestions?





RE: Large diameter penstock branch design
Boulder Canyon Project Final Reports; Part V - Technical Investigations. Bulletin 5 - Penstock Analysis and Stiffener Design. US Department of the Interior. 1940.
Other references, which are largely based on the above work, include:
Design of Wye Branches for Steel Pipe. Journ. AWWA 47:6:581 (June 1995)
AISI Steel Plate Engineering Data Volume 4
AWWA M11
ASCE MOP No. 79 - Steel Penstocks
Bureau of Reclamation Engineering Monograph 3 - Welded Steel Penstocks, available @
http:/
Structural Mechanics of Buried Pipe - ISBN 0849323959; Chapter 18 - Special Sections
RE: Large diameter penstock branch design
Thanks so much for your comments and list of documents, much appreciated. I've managed track many of them down and have some of in house.
I also found the following thread that had some suggestions (many of the same):
http
Of particular interest is the "Structural Mechanics of Buried Pipes" by Watkins and Anderson, that has a section on the design of wyes.
Looks like I have some reading to do.
Regards
tb
RE: Large diameter penstock branch design