Boiler Tube Question

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SCBryan
Posts: 34
Joined: Tue Feb 10, 2015 12:37 pm
Location: Fort Wayne, IN

Boiler Tube Question

Post by SCBryan » Tue Feb 25, 2020 12:14 pm

I recently purchased a second hand boiler that was never used. It is steel with copper boiler tubes. Doing a quick check with low air pressure, I find some of the tubes are leaking. What is the best way to tighten them? Build a swaging device? Any suggestions appreciated.

Steve

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Marty_Knox
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Joined: Thu Jan 09, 2003 6:50 pm
Location: Michigan, USA

Re: Boiler Tube Question

Post by Marty_Knox » Tue Feb 25, 2020 12:24 pm

You are much better off buying or borrowing a real tube roller. Most live steam locomotives would use what is called a condenser roller. The two most prominent manufacturers are Elliott (Elliott-tool.com) and Thomas C. Wilson (TCWilson.com) company. You will need to know the OD of the tube and the wall thickness, measured in gauge. Lots of information on both websites.

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NP317
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Location: Northern Oregon

Re: Boiler Tube Question

Post by NP317 » Tue Feb 25, 2020 12:33 pm

I second Marty's advice.
Do it correctly the first time. It costs less in the long run.
RussN

hoppercar
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Joined: Sun Jul 22, 2018 4:09 pm

Re: Boiler Tube Question

Post by hoppercar » Tue Feb 25, 2020 1:37 pm

I have several different sizes of elliot rollers....they work great...

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ALCOSTEAM
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Location: illinois

Re: Boiler Tube Question

Post by ALCOSTEAM » Tue Feb 25, 2020 7:44 pm

I will also second the tube roller advice. Swaging is a last ditch effort if you cant get a roller in the tube.

Years ago I attended the auction of a closed heat exchanger/ pressure vessel builder and picked up a good selection of mostly T.C. Wilson rollers. I have bought new ones also from T.C. Wilson.

I have also re rolled leaky pushrod tubes in the heads of a big old 1934 Rolls Royce engine a friend was working on.

https://cdn.dealeraccelerate.com/charle ... head-coupe

https://i.pinimg.com/originals/69/5f/d9 ... 5b2733.jpg

Harold_V
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Location: Onalaska, WA USA

Re: Boiler Tube Question

Post by Harold_V » Wed Feb 26, 2020 2:01 am

Don't overlook the use of urethane. A proper fitting urethane bushing trapped between two washers on a threaded rod will expand a tube, even when there's irregularities in the tube plate. Urethane, unlike rubber, tends to stay together and does not extrude. You have the added option of expanding the tube only where you desire.

H
Wise people talk because they have something to say. Fools talk because they have to say something.

SCBryan
Posts: 34
Joined: Tue Feb 10, 2015 12:37 pm
Location: Fort Wayne, IN

Re: Boiler Tube Question

Post by SCBryan » Wed Feb 26, 2020 12:11 pm

Thank you, everyone, for the suggestions and advice.

Steve

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Bill Shields
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Re: Boiler Tube Question

Post by Bill Shields » Wed Feb 26, 2020 1:20 pm

BEFORE you purchase the roller, measure the clearances that that you have around the tubes.

in many loco boilers, you can end up in a situation where you cannot get the roller in 'square' because of obstructions...which can include welds....or just obstructions inside of the firebox (often the firebox itself).

Most roller manufacturers make versions for 'tight spaces' which can include universal joints, extensions....looking in the catalog(s) will give you an idea of what I am describing.

if you know what you need, you can often order it correctly from the get-go rather than modifying 'after the fact'.
Too many things going on to bother listing them.

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