Round Tube / Pipe Moment Splice
Round Tube / Pipe Moment Splice
(OP)
I'm currently doing research for a project that will require several moment splice connections for round steel tube / pipe sections. Each splice will also contain a reduction in the diameter of the next pipe section. The project is a tall spire (200'+) and I am proposing to design it similarly to a steel stack vessel. I've already found a good reference (ANSI/ASME STS-1-2006), but have yet to order.
Anticipating that this reference does not include the design of the connection I've mentioned, I was hoping to see if any of you knew of any good references. I have conceptually laid out the connection (see attached file) and have some ideas on how to analyze, but am looking for some back up material to make sure I'm covering all bases.
Anticipating that this reference does not include the design of the connection I've mentioned, I was hoping to see if any of you knew of any good references. I have conceptually laid out the connection (see attached file) and have some ideas on how to analyze, but am looking for some back up material to make sure I'm covering all bases.






RE: Round Tube / Pipe Moment Splice
If this is true, perhaps tapped holes, nuts welded inside, etc. could be a solution.
www.SlideRuleEra.net![[idea] idea](https://www.tipmaster.com/images/idea.gif)
www.VacuumTubeEra.net
RE: Round Tube / Pipe Moment Splice
RE: Round Tube / Pipe Moment Splice
Is the spire to be ground mounted or on a building? If on a building, I would research oscillation initiated failures. I can't really give you any details, other than to say I have read about problems with antennas, spires, etc. on tall buildings.
The welding of the flanges to the pipe sections should be complete penetration, which would probably best be done from outside with backing bars inside.
I have seen similar spires made tapered rather than stepped. Don't know how they do it, but would avoid stress concentrations.
RE: Round Tube / Pipe Moment Splice
Mike McCann
MMC Engineering