[Psml] Aluminum Hose Barb Question

[Dan Gingras]

Brass is incompatible with aluminum, per MIL-STD-889B (and Notices 1, 2 & 3
thereof) DISSIMILAR METALS

This is NOT a good idea.  If you have an aluminum tank you should find a
compatible fitting in a similar metal (5056 etc) at the tank side.   I'm
assuming that you want to attach the hose fitting to the tank, which would
be welded to the tank.  You couldn't attach a brass fitting to an aluminum
tank (well maybe you could braze it) but it would soon fail.  

If you're talking about the other end of the hose (deck level) than it
doesn't make much difference since the hoses would be electrically separated
by the hose which is nonconductive.


P/C Dan Gingras SN
Amoskeag PS



-----Original Message-----
From: psml-bounces at usps.org [mailto:psml-bounces at usps.org] On Behalf Of
d.donkers at comcast.net
Sent: Saturday, June 27, 2009 12:21 PM
To: dgingras at comcast.net
Cc: United States Power Squadrons Mailing List
Subject: Re: [Psml] Aluminum Hose Barb Question

Henry  --

Try beveling the inside diameter of the hose.  

I would also be careful with the aluminum fittings.  They 
are frequently a casting, which is much more brittle than 
a machined fitting - the casting is more likely to fail 
unexpectedly.  A good brass fitting should not have any 
problems with the aluminum tank.  

Just a reminder - don't forget to use two hose clamps!  8^)

Dave Donkers   DuPage

----- Original Message -----
From: "C. Henry Depew" <sisu26 at nettally.com>
To: "Dave Donkers" <d.donkers at comcast.net>
Cc: "United States Power Squadrons Mailing List" <psml at usps.org>
Sent: Monday, June 22, 2009 6:02:20 PM GMT -06:00 US/Canada Central
Subject: [Psml] Aluminum Hose Barb Question

Greetings!
     I am installing an aluminum fuel tank and want to use aluminum 
hose barbs.  The problem seems to be that the aluminum hose barb for 
3/8 inch ID hose is a "little big" for the hose.  My brass 3/8 inch 
hose barbs fit the fuel hose quite nicely but I would rather use the 
aluminum hose barbs.  Any suggestions as to how to get the 3/8 inch 
ID hose to slide on the aluminum barbs?

C. Henry Depew
Crystal River

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