Re: Cutting Discharge Pipes at an Angle

[How to properly pipe outlets of safety valves]

Miles Abernathy wrote:

> >> 4. Vent to outside. Cut the top of the vent piping at a diagonal so that no
> >> one can think of connecting anything to it
> >
> >You know, I had never heard this as a reason for terminating discharge
> >piping in that manner. It makes sense, but in a way that is not
> >immediately apparent.
>
> I also never heard this explanation, but it is logical. I was told that you
> cut the pipe at a diagonal "to prevent sound generation, like an organ
> pipe," which I never could quite understand.

Could an argument be made for increasing the surface area of the opening (although if the valve and piping were correctly sized, that shouldn't be an issue)? Or maybe the original concept was based on discharges that extend horizontally, and cutting the pipe in that way helped to keep out rain?

So many "rules of thumb" for piping design and layout are based in its long history that we'll probably never know for sure.

Paul Received on Fri Feb 18 21:17:00 2000