Author Topic: 3 inch boiler build  (Read 1275 times)

Offline crueby

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Re: 3 inch boiler build
« Reply #45 on: July 17, 2018, 11:08:48 PM »
Great dumb luck on the joint, paid for by the sheared off adapter.   :zap:


Possible that the gas bottle went empty? If its a small one, they dont last long, the big gas grill (20 pounds here) are great, easy to judge how much is left.


Here's hoping on the test!


 :popcorn:

Offline zeeprogrammer

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Re: 3 inch boiler build
« Reply #46 on: July 17, 2018, 11:16:56 PM »
than the Sievert torch went out and was very tricky to relight again in the 'heat' of the moment   :) . I struggled with this for a while, particularly with the fiddly and counterintuitive bottle regulator that came with the torch. At this point I was acutely aware that all the time the boiler was losing heat,

Half an hour later I fished the boiler out of the pickle to look at it. Imagine my surprise when I saw that the joint in question had formed into a smooth, round pristine collar of silver solder round the neck of the tube. It's now the best-looking joint on the boiler, and unless anything else opened up with the heat (and I have no reason to think that happened) it may be that the boiler is now intact.

I say 'may be'. It went straight back on to my hydraulic testing rig. When I upped the pressure I noticed a leak from where the neck of the adaptor I had made for the test pressure gauge was screwed into the boiler bushing so I took a spanner to tighten the adaptor ... and sheared off the threaded section at the end!

We could almost trade posts today and no one would notice. (Although I was more mum about my various disasters. Not a good thing really. Best to be embarrassed and help others. Actually no reason to be embarrassed either. 'newbie' = sometimes does things wrong until learned.)

Am I completely useless or is this normal for beginners?

Normal! Else I am in serious trouble...or rather uselessness.  :Lol:
Carl (aka Zee) Will sometimes respond to 'hey' but never 'hey you'.
"To work. To work."
Zee-Another Thread Trasher.

Offline gary.a.ayres

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Re: 3 inch boiler build
« Reply #47 on: July 17, 2018, 11:47:13 PM »
Thanks guys.

Chris - yes, 'dumb luck' was the phrase running through my head this evening...! At least having paid for it I don't need to feel that I cheated  :)

It wasn't the gas bottle because to exclude that I went out to the garage and bought a new one. Googling it revealed that quite a few people have this kind of problem with Sievert torches. I suspect it might just be about being more precise with the various valves, but it warrants more investigation for sure.

Carl - thanks for the moral support. No doubt it is by muddling through these scenarios that we gradually learn...

I do hope that other people will benefit from the wealth of information that all you guys have offered in this thread.

Will keep you posted on the eventual hydro test. Or re-test I should say.

All the best,

gary

Offline crueby

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Re: 3 inch boiler build
« Reply #48 on: July 18, 2018, 12:15:50 AM »
Is your torch the type that screws on a bottle the size of a thermos? Sounds like possible clog in a jet. Common issue in the smaller butane burners, with contamination in the gas. I have not seen that in the propane or mapp ones (at least yet).

Offline Kim

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Re: 3 inch boiler build
« Reply #49 on: July 18, 2018, 05:43:32 AM »
Gary,
This all sounds quite normal to me.  But think how boring it would be if everything just worked right the first time and there was no learning curve?  What would be the fun in that?  Part of what makes this hobby so interesting is the many things there are to learn.  And doing it wrong several times (many, many times, if you're me) is just part of the process.

I usually get something to work after the first or second try (like sliver soldering) then come back to try it on a different part later, and have yet more problems of a different kind.  Its all part of the learning curve. And what makes it so fun when you do it right!

You've got to enjoy the process!  That's what makes it fun, right?  :Jester:
Kim

Offline gary.a.ayres

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Re: 3 inch boiler build
« Reply #50 on: July 18, 2018, 05:45:56 AM »
Chris -

No, it's one of these:

https://gasproducts.co.uk/gas-blow-torches/sievert-gas-blow-torch-kits/sievert-general-purpose-gas-blow-torch-kit.html

Used with propane bottles of various sizes. I did wonder about the possibility of a partially blocked jet though... will look into that.

Kim - there is wisdom in your words. You are absolutely right. A philosophy with which I agree but need the occasional reminder to follow!

Thanks,

gary

Offline Jasonb

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Re: 3 inch boiler build
« Reply #51 on: July 18, 2018, 09:22:39 AM »
As they both went out did you have more firebrick or insulation around the boiler as that can starve the burner of fresh air or worse still working in a close space.

Offline gary.a.ayres

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Re: 3 inch boiler build
« Reply #52 on: July 18, 2018, 12:22:10 PM »
I did have a fair bit Jason. Will bear that in mind, and experiment a bit before next time.

However, I think it was more than that. The Sievert was hard to light and went out even when not near the job.

Cheers.