[Psml] Aluminum Hose Barb Question

[Ken Voight]

Hello All,

Having just installed two new aluminum tanks I was advised by the builder of
the tanks and reading Alcoa's Data sheets not to have brass or any copper
content in direct contact with the tank the advised using either aluminum
fittings or stainless steel. I used stainless bushings then with stainless
elbows with a bronze hose barb worked great hose went on without much
effort. On the fill side same setup same was used except a toe 3" bushing
was used and double clamped. By the way the toe bushing was the way the file
was built by the original manufacture. I was shown a tank that was cut out
of late model 48 Italian boat that use brass fitting and it was corroded all
the way through. I had to be cut out in sections and duplicated to fit back
into an odd shaped area on the boat. Also it is advised not to have the tank
in direct contact with any porous material that could hold moisture in
direct contact with the tank. I used epoxy paint to coat the stringers.
There is on the Web an article with pictures of one tank replacement and
they used starboard glued to the bottom off the tank. Bottom line thou I
would recommend not having any copper containing alloy metal in direct
contact with the tank.

Ken Voight

-----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 9:21 AM
To: Ken Voight
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

________________________________________
Need to subscribe, unsubscribe or change your email address?  See
www.usps.org/mailman/listinfo/psml for details.
________________________________________
Need to subscribe, unsubscribe or change your email address?  See
www.usps.org/mailman/listinfo/psml for details.