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04-08-2012, 11:27 PM
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Join Date: Apr 2011
Location: san rafael
Posts: 110
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should fuel line be primed/painted?
Since all non alclad is supposed to be primed
does that mean I should prime/paint the fuel lines?
if so, what color are fuel lines supposed to be?
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04-09-2012, 10:08 PM
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Join Date: Feb 2010
Location: Vancouver, BC, Canada
Posts: 860
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fuel line marking
If you are using an epoxy primer I would paint them with that and leave as is, I don't think the color matters. Aircraft fluid lines can be marked by tapes whose color, symbol and lettering identify the fluid being carried. In the case of fuel this color is red, as are most fuel tank caps for the same reason. Tapes are available if you should desire, check the internet. See also this resource for fabricating and marking fluid lines.
http://www.faa.gov/library/manuals/a...83-30_Ch07.pdf
__________________
Terry Edwards
RV-9A (Fuselage)
2020/2021 VAF Contribution Sent
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04-10-2012, 01:50 AM
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Join Date: Mar 2009
Location: Netherlands
Posts: 663
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To be honest I never thought about painting the fuel lines and I have never seen one with painted fuel lines.
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04-10-2012, 02:05 AM
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Join Date: Feb 2010
Location: Perth, Western Australia
Posts: 1,647
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Quote:
Originally Posted by Gagarin737
To be honest I never thought about painting the fuel lines and I have never seen one with painted fuel lines.
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Mine are not painted. Never occurred to me either.
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rgmwa
RV-12LR 912ULS
120346
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04-10-2012, 10:58 AM
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Join Date: Apr 2011
Location: san rafael
Posts: 110
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overkill
it's probably not necessary since they are always inside the cabin and not exposed to moisture ?
I've never seen them painted either
but it's just 3003 alumimium, not alclad, so technically you would expect it to need priming.
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04-10-2012, 10:59 AM
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Join Date: Dec 2008
Location: Big Sandy, WY
Posts: 2,567
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Me neither. They are zinc primated on big birds though.
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Actual repeat offender.
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04-10-2012, 11:07 AM
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Join Date: Jan 2007
Location: Battleground
Posts: 4,348
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Fuel lines can corrode; from the inside out. I just replaced the interior cabin hard lines in my Bucker due to a pinhole that developed. The particular fuel system designed for this airplane had a low point in a reserve fuel line that allowed some contamination to stagnate in the line and over time, some 18 years, it finally developed the pin hole.
I seriously doubt this would occur in a properly maintained and operated RV.
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Smart People do Stupid things all the time. I know, I've seen me do'em.
RV6 - Builder/Flying
Bucker Jungmann
Fiat G.46 -(restoration in progress, if I have enough life left in me)
RV1 - Proud Pilot.
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04-10-2012, 03:07 PM
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Join Date: Apr 2011
Location: san rafael
Posts: 110
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Quote:
Originally Posted by JonJay
Fuel lines can corrode; from the inside out. I just replaced the interior cabin hard lines in my Bucker due to a pinhole that developed. The particular fuel system designed for this airplane had a low point in a reserve fuel line that allowed some contamination to stagnate in the line and over time, some 18 years, it finally developed the pin hole.
I seriously doubt this would occur in a properly maintained and operated RV.
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well priming the outside would not have helped in that case anyway.
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04-10-2012, 03:14 PM
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Join Date: Jul 2005
Posts: 1,346
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3003 Aluminum has good corrosion resistance in it's natural state. Fluid lines are typically not coated.
(I did polish some of mine though!)
__________________
Mike W
Venice, FL
RV-6A. Mattituck TMX O-360, FP, GRT Sport EFIS, L3 Lynx NGT-9000
N164WM
N184WM reserved (RV-8)....finishing kit in progress. Titan IOX-370
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04-10-2012, 03:25 PM
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Join Date: Jan 2007
Location: Battleground
Posts: 4,348
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Quote:
Originally Posted by tim walter
well priming the outside would not have helped in that case anyway.
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Funny, well no, and priming the inside would be hard to do, and not very wise.
Interesting side note. All of the lines are painted on my G.46 projects. They are copper lines, yes, copper throughout, and they are painted for identification. I do not know what the standard is but it is well documented in the manuals and schematics, I just have to learn to read Italian better. Hydraulic lines are one color, fuel another, static, pitot, etc....
It is quite pretty.
__________________
Smart People do Stupid things all the time. I know, I've seen me do'em.
RV6 - Builder/Flying
Bucker Jungmann
Fiat G.46 -(restoration in progress, if I have enough life left in me)
RV1 - Proud Pilot.
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