gas pipe velocities, erosion and sound pressure level
gas pipe velocities, erosion and sound pressure level
(OP)
Hello,
I have a gas pipe orifice metering tube that measures 6 in OD schedule 40. I am review the orifice size and resulting piping velocities.
Does anyone know any velocity limits?
I calculate velocities at the orifice around 163 Ft/sec. 60 Ft/Sec in the pipe.
Does anyone have a correlation on what sound pressure level that might produce?
Are there limits for erosion?
Thanks
Ken
I have a gas pipe orifice metering tube that measures 6 in OD schedule 40. I am review the orifice size and resulting piping velocities.
Does anyone know any velocity limits?
I calculate velocities at the orifice around 163 Ft/sec. 60 Ft/Sec in the pipe.
Does anyone have a correlation on what sound pressure level that might produce?
Are there limits for erosion?
Thanks
Ken





RE: gas pipe velocities, erosion and sound pressure level
The velocity in your main line at 60 ft/sec seems quite reasonable strictly on a velocity criteria. The velocity through the orifice suggests a beta ratio of about 0.6, is that in the ballpark? There's always a velocity increase of course going through an orifice plate due to the reduction in area for flow but nothing about this setup with the information you've given jumps out at me.
What are the operating conditions? Sorry, I don't usually get involved in estimating sound levels so I can't help you there.
RE: gas pipe velocities, erosion and sound pressure level
That was a beta ratio of 0.6.
Thanks for the comment.
RE: gas pipe velocities, erosion and sound pressure level
Going the Big Inch!
http://virtualpipeline.spaces.msn.com
RE: gas pipe velocities, erosion and sound pressure level
Hope you like this one,
dBA = 10 * log(Q^2 *(dP/P1)^3.6 * (T/Mw)^1.2) + 126
Q kg/s
dP kPa
P1 upstream p kPa
T ºK
Mw Molecular Wt
Going the Big Inch!![[worm] worm](https://www.tipmaster.com/images/worm.gif)
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