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Old 02-03-2019, 05:04 PM
Jaroslav Jaroslav is offline
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Default Gasoline tank help.

I should make a tank. The tank is made of galvanized sheet metal. Welded is spotted. Continuous weld - wheel. Do you have any advice on how to make connections ??? The tank is a rally car. I need it to be safety.

DSC00089.jpg

DSC00090.jpg

DSC00094.jpg
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Old 02-03-2019, 06:42 PM
crystallographic crystallographic is offline
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Originally Posted by Jaroslav View Post
I should make a tank. The tank is made of galvanized sheet metal. Welded is spotted. Continuous weld - wheel. Do you have any advice on how to make connections ??? The tank is a rally car. I need it to be safety.

Attachment 51268

Attachment 51269

Attachment 51270

This old tank in your pictures is formed and soldered, Jaro.
Not welded.
Material may be a lead-coated steel, which we call "terne plate" and millions of tanks were made this way, out of terne.
No reason to weld galv or terne - you have to sand back the coatings from the weld area before welding, about 2cm. Big job, doing both sides and both edges, all completely. Then you are asking for rust on the bare steel.
Solder is okay on galv and terne, no leaks and lasts for 30 years.
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Old 02-03-2019, 06:53 PM
Jaroslav Jaroslav is offline
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I will remove the color. But I really feel it is spot welded by a continuous method.
Kent ,are you saying does not mind brazing?
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Old 02-03-2019, 07:22 PM
crystallographic crystallographic is offline
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I will remove the color. But I really feel it is spot welded by a continuous method.
Kent ,are you saying does not mind brazing?

I did not see a close-up image of the seam, but if it is a "mash-seam" rotary spot weld seam, then maybe brazing might be good - after spot welding it together - or screwing it.

But if I were doing this job, I would make it all up with final fits, then then scrub all joints and then flux the whole works and screw here and there, and then solder it all.

Brazing will fight with the coating because of the 500F temp difference - been there and hated every second of the nasty fumes and nasty surfaces.
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Last edited by crystallographic; 02-03-2019 at 07:26 PM.
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Old 02-04-2019, 07:03 AM
Ron Naida Ron Naida is offline
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Default gas tanks

http://allmetalshaping.com/album.php?albumid=1007


http://allmetalshaping.com/album.php?albumid=429


Jaroslav
The above are two albums I posted of tanks I made by using terne or
tinned cold rolled sheet.
They are soldered and pressure tested
I have not been able to easily find terne lately so I just tin the complete sheet inside and out.
I hope the photos are of some help.


Ron
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