Pipe manifold design with opening both sides
Pipe manifold design with opening both sides
(OP)
Hi
We are designing a pipe manifold with reinforced openings on both sides of the main (like a cross). Is there a code rule (B31.1 or B31.3) that does not allow this or requires special design?
We have designed the reinforcing pads and checked the that the reinforcement zones do not overlap. The branches are DN600 and the main DN750.
We can see there are rules for spacing the branch openings but does this apply when the openings are on the opposite sides of the main?
This issue has come here up before
http://www.eng-tips.com/viewthread.cfm?qid=379970
but no consensus.
Thanks in advance.
We are designing a pipe manifold with reinforced openings on both sides of the main (like a cross). Is there a code rule (B31.1 or B31.3) that does not allow this or requires special design?
We have designed the reinforcing pads and checked the that the reinforcement zones do not overlap. The branches are DN600 and the main DN750.
We can see there are rules for spacing the branch openings but does this apply when the openings are on the opposite sides of the main?
This issue has come here up before
http://www.eng-tips.com/viewthread.cfm?qid=379970
but no consensus.
Thanks in advance.





RE: Pipe manifold design with opening both sides
I see that this in earlier thread started a long discussion and as you stated with no consensus. Why not turn the question around: could you adapt, construct or find a solution that undoubtly lies within existing rules and regulations, or a standard commercial component?
Please also be reminded that in such a vessel flow, turbulence, draining and correct placing, orientation and support, plus selection and placing of valves could be a design issue in addition to mechanical strength.
RE: Pipe manifold design with opening both sides
RE: Pipe manifold design with opening both sides
Gerhardl - We are very much suck with a custom design that meets the flow path requirements of the manifold.
RE: Pipe manifold design with opening both sides
I would recommend large opposite branch connection are treated a special design and not use piping code calculations.