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Tubing Inspection


      Aluminum Tubing Inspection

            For Telescoping Poles

All new tubing received should be given at least a minimal inspection before 

attempting to telescope the tubes together, and remove any damage 

found.  Aluminum is a soft metal which can easily be damaged through 

shipping or mishandling along the way. Minor damage is relatively easy to 



Damage below the tubing surface is not a problem, but damage which

occurs above the suface can rub on the opposing surface as it passes. This

creates a furrow, much like a farm plow would create in a field. Like a plow,

the tip pushes down into the surface, but it also throws up material on 

both sides of the contact point. This is a new defect which creates a new

contact point for the next time the tube is inserted. These defects can

accumulate; eventually, the tubes can lock together.  For telescoping poles, 

free movement is critical.


Visual Inspection: 

Look over all of the external surfaces, locating any dents, dings, scratches 

or other defects which may cause problems. For minor damage, you may 

be able to use a metal polish to remove it. For larger damage, use 

scouring pads or light sandpaper, then use steel wool and, finally, 

polish. Lubrication allows easier assembly, but be aware that it is a very

large attractor for dust, dirt, and other foreign objects.


Tactile Inspection:

Sometimes the sense of touch is more accurate than

sight in finding defects.  If you hold the tube in your hand and slide it gently,

you can feel any bumps or scratches. These can usually be buffed out

with polish or a fine grade steel wool.

Special Inspection:

If the tubing has slots cut into it, or holes drilled, you should remove any 

sharp edges from inside the tube to prevent new scratches. A screwdriver

can remove most of the larger defects, but a burnishing tool or a rounded

nutdriver edge can make a much smoother appearance.  A screwdriver tends 

to create new damage due to the sharp edges. Another location to 

inspect for sharp edges is on the inside and outside rims of the tubing, on both 



Rub the tubes with a clean cloth to remove any dust on the outer surface. 

For the inside suface, there's not a lot that can be done, but look inside

with the far end lit up to see if there are any major defects. Take a 

clean cloth and push it all the way through the tube and out the far end.

This should remove any loose dirt and metal particles.


Article details
Article ID: 3
Company: Knowledgebase
Date added: 2013-10-17 09:57:31
Views: 768

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