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Thread: metric capillary tube
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19-02-2006, 11:14 AM #1
metric capillary tube
Hello, anybody
May be my question is stupid but yet I want ask it.
There are standard capillary tube I.D. in inches.
And what about standard capillary tube I.D. in millimeters?
I am ordering capillary tube to my supplier 0.054" I.D.
My supplier sent me capillary tube 1.37 mm I.D.
When I am trying check I.D. that capillary tube by pin (Capillary tube gauge № A10971 J/B Industries, AURORA ILLINOIS, USA 60507), pin can't enter in the capillary tube
What's reason?
a) bad pin
b) wrong capillary tube
c) my inefficient hands
Thanks for any advice
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19-02-2006, 02:43 PM #2
Re: metric capillary tube
Could be 'c' but also was the end of the captube burred at all?
Brian - Newton Abbot, Devon, UK
Retired March 2015
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19-02-2006, 03:14 PM #3
Re: metric capillary tube
Hi Tralex
0.040 Thou is near enough 1mm, or at least thatsthe guide I use.
Kind Regards. Andy
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20-02-2006, 12:43 PM #4
Re: metric capillary tube
Thank you Andy and Brian_UK.
The end of the captube was clean and not oval.
Now I knew there are captubes with same outer diameter and different inner diameter. How I can check inner diameter without pin?
Does anybody know some link on the European norm or ASHRAE document ?
Thanks
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20-02-2006, 08:59 PM #5
Re: metric capillary tube
Hi Tralex
to be honest I have never felt the need to measure a capillary ID. They come in a roll, with the ID tagged on it
File a pin down until it fits the ID (widest part of the pin) and stick it in a micrometer to fine the diameter of the pin.
Kind Regards. Andy
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21-02-2006, 06:57 AM #6
Re: metric capillary tube
Hi Andy
It's good idea. I'll do it.
Thank you very much.
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