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ronron
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Impulse Tube

08/18/2011 9:09 AM

Hi All,

How many bending allowable for impulse tubing and what is the maximum length of lead.

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PWSlack
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#1

Re: Impulse Tube

08/18/2011 9:16 AM

How flexible is this tubing and why is it made of lead?

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Doorman
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#3
In reply to #1

Re: Impulse Tube

08/18/2011 2:31 PM

Hyuk yuk yuk!

Press for Rimshot.

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lyn
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#2

Re: Impulse Tube

08/18/2011 1:00 PM

I'll try to answer the question I think you asked. The number of bends is not important as long as there are no kinks or blockages. Tube length should be kept to a practical minimum.

Remember, there is no flow here so the tube is more a plenum that a transport mechanism.
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RHABE
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#4

Re: Impulse Tube

08/19/2011 4:34 AM

Please give some more information.

Is this intended to impulsively drive advanced (but very loud) aircraft?

What is lead in this device?

RHABE
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vargaalex
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#5

Re: Impulse Tube

08/19/2011 10:18 AM

Normally there should be no more than 3 90 bends in any tubing run, but on loung runs you can use the convention of having no more than 3 90 bends every 60 feet.

As to the lead, depends on the size of the tubing.

If the tubing is over 60 feet you may need to use larger diameter tubing.
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Iris
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Join Date: Jul 2010
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#6

Re: Impulse Tube

08/19/2011 11:25 AM

NEL has a comprehensive white paper covering the installation of impulse tubing for differential pressure flowmeters.

It can be downloaded here:

http://www.idc-online.com/technical_references/pdfs/instrumentation/Differential%20pressure%20meters_nel.pdf
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