Perforated Metal - Exterior Pressure
Perforated Metal - Exterior Pressure
(OP)
This is not really a code item, but I'm looking for a rational way of rating a strainer element.
When determining the maximum dP across a strainer element, my company has traditionally used Sect VIII internal pressure calculations with a deduction for "plate efficiency" based on hole pattern. This works great.
The problem - a lot of customers need to install them "inside-out". External pressure calculations using the "plate efficiency" as the thickness renders extremely conservative results, to say the least.
Any ideas?
When determining the maximum dP across a strainer element, my company has traditionally used Sect VIII internal pressure calculations with a deduction for "plate efficiency" based on hole pattern. This works great.
The problem - a lot of customers need to install them "inside-out". External pressure calculations using the "plate efficiency" as the thickness renders extremely conservative results, to say the least.
Any ideas?





RE: Perforated Metal - Exterior Pressure
How about testing a bunch of them and developing your own empirical coefficients based on test results ?
This should be a fairly straight forward test rig.....
RE: Perforated Metal - Exterior Pressure
That would be nice but - small company, no test department. There've been field failures over the years (ours and other's) that have provided enough rules of thumb that we don't usually have a problem. However, it would be nice to have a solid answer to "how much is this rated for?"
As a side note - I've got a collapsed strainer from another company that I measured up. We are supplying replacements with additional stiffening. Apparently, it's not an isolated problem.
Thanks for the input.