Belpaire Boiler for a PRR G-5

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SteveM
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Re: Belpaire Boiler for a PRR G-5

Post by SteveM » Tue Dec 12, 2017 8:26 pm

Nice work, Marty.

Your welding is neater than my caulking the bathtub!

Steve

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Marty_Knox
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Re: Belpaire Boiler for a PRR G-5

Post by Marty_Knox » Tue Dec 12, 2017 8:41 pm

Thank you Steve, but that is Glenn Grasley's welding. He has been working with me for the last five years, and is about the best welder I've known.

jlakes85
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Re: Belpaire Boiler for a PRR G-5

Post by jlakes85 » Wed Dec 13, 2017 5:28 pm

Marty,

Looks great. A lot more hydraulic press oragami than the shay boiler. What type of Miller Tig machine is that in the background? Looks like a 3 phase machine.

Regards,

John

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Marty_Knox
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Re: Belpaire Boiler for a PRR G-5

Post by Marty_Knox » Wed Dec 13, 2017 8:51 pm

jlakes85 wrote:Marty,

Looks great. A lot more hydraulic press oragami than the shay boiler. What type of Miller Tig machine is that in the background? Looks like a 3 phase machine.

Regards,

John
Hi John - Thank you!
It is a Miller Dialarc HF, a 300 amp machine for TIG and Stick. We do have 3 phase in the shop, but that is a single phase machine.

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Marty_Knox
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Re: Belpaire Boiler for a PRR G-5

Post by Marty_Knox » Thu Dec 14, 2017 11:23 am

Here Glenn is welding the stays inside the firebox. The vacuum is set up to draw the fumes out.
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Marty_Knox
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Re: Belpaire Boiler for a PRR G-5

Post by Marty_Knox » Thu Dec 14, 2017 11:26 am

The stand wouldn't go low enough to level the mud ring, so Glenn improvised. A length of pipe made a good support.
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Marty_Knox
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Re: Belpaire Boiler for a PRR G-5

Post by Marty_Knox » Thu Dec 14, 2017 11:29 am

Here are some views of the inner firebox.
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Marty_Knox
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Re: Belpaire Boiler for a PRR G-5

Post by Marty_Knox » Thu Dec 14, 2017 11:32 am

Here is the inner firebox after welding. The pipes keep it from distorting from the welds.
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JohnHudak
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Re: Belpaire Boiler for a PRR G-5

Post by JohnHudak » Thu Dec 14, 2017 11:57 am

Wow...!

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Marty_Knox
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Re: Belpaire Boiler for a PRR G-5

Post by Marty_Knox » Thu Dec 14, 2017 2:33 pm

Here Glenn is lapping the dome base.
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Marty_Knox
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Re: Belpaire Boiler for a PRR G-5

Post by Marty_Knox » Thu Dec 14, 2017 2:38 pm

Here he is lapping the dome cap. We have a large lapping plate, a small lapping plate, and a hand lap. We use Timesaver non-imbedding lapping compound. The flatter the mating surfaces are, the easier it is to get them to seal.
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765nkp
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Re: Belpaire Boiler for a PRR G-5

Post by 765nkp » Fri Dec 15, 2017 8:49 am

Marty, the boiler looks great. I have a question about the through stays, what size of pipe do you use for that? Sch 80?

Thanks Tim

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