Calculation of Collapse Pressure for Perforated Pipes
Calculation of Collapse Pressure for Perforated Pipes
(OP)
Hi all
Can you please guide me on how to calculate the collapse pressure of perforated Pipes.
My case is to make a 2mm thick Pipe (1500 mm long) to be used as a filter element with perforations. The wire meshes shall be wound around the perforated pipe.
Design pressure - 5 kg/sqcm(g), which shall be the maximum differential pressure across the Perforated pipe
Required No. of holes on Pipe = 1250
Hole diameter = 8 mm
Hole pitch = 13 mm, triangular pitch
Are there ready references ??
Thanks in advance
Can you please guide me on how to calculate the collapse pressure of perforated Pipes.
My case is to make a 2mm thick Pipe (1500 mm long) to be used as a filter element with perforations. The wire meshes shall be wound around the perforated pipe.
Design pressure - 5 kg/sqcm(g), which shall be the maximum differential pressure across the Perforated pipe
Required No. of holes on Pipe = 1250
Hole diameter = 8 mm
Hole pitch = 13 mm, triangular pitch
Are there ready references ??
Thanks in advance





RE: Calculation of Collapse Pressure for Perforated Pipes
Flow is from outside to inside (external pressure design case of 5 kg/sqcm)
Material of construction of Pipe - SA240-304
RE: Calculation of Collapse Pressure for Perforated Pipes
Is 5 bar differential the maximum pressure outside, assuming zero inside and a fully blocked filter?
Is a fully blocked filter realistic?
The difficulty of this approach is why you normally go inside to out, plus it makes the capture of dirt a lot easier.
However assuming you're stuck with your design and flow and not bothered about debris, I think you will either have to model this in FEA or you may just make one and test it. Try a cylinder 1mm thick or 0.5mm thick and see if it holds up.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Calculation of Collapse Pressure for Perforated Pipes
Never have run across a method to calculate the collapse pressure of drilled pipe.
Some observations:
[ol 1]
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RE: Calculation of Collapse Pressure for Perforated Pipes
RE: Calculation of Collapse Pressure for Perforated Pipes
A justification to this is that a tube buckles by forming an oval (or a higher order waved shape), and longitudinal weak lines passing through the ligaments will be the source for bending to the collapsed shape.
prex
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RE: Calculation of Collapse Pressure for Perforated Pipes