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| Another all new - all welded boiler delivered https://www.rypn.org/forums/viewtopic.php?f=1&t=38003 |
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| Author: | Trevor Heath [ Wed Apr 29, 2015 1:42 am ] |
| Post subject: | Another all new - all welded boiler delivered |
http://www.puffingbilly.com.au/about-pu ... p-updates/ |
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| Author: | Bob Hall [ Wed Apr 29, 2015 3:33 am ] |
| Post subject: | Re: Another all new - all welded boiler delivered |
Hmmm, shame 3801's boiler wasn't built in Sydney! |
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| Author: | Paul Boschan [ Wed Apr 29, 2015 9:32 pm ] |
| Post subject: | Re: Another all new - all welded boiler delivered |
I think the removable steam dome is brilliant! You can work on the throttle in comfort and not have to worry so much about dropping the U-bolt on the tube bundle. |
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| Author: | E&N6004 [ Wed Apr 29, 2015 10:51 pm ] |
| Post subject: | Re: Another all new - all welded boiler delivered |
Paul: Yes that design of dome is a VERY good one, it is a direct reproduction of the dome on the original South African NG/G-16 boiler. I'm pretty sure that was the normal way of constructing steam domes in the "British" school of design. As you say it makes fitting up the throttle, as well as getting in and out of the boiler a lot easier. Pat Edit: Of course I shouldn't say direct reproduction, the original wasn't welded. |
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| Author: | Kelly Anderson [ Thu Apr 30, 2015 4:32 pm ] |
| Post subject: | Re: Another all new - all welded boiler delivered |
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| Author: | Howard P. [ Thu Apr 30, 2015 8:11 pm ] |
| Post subject: | Re: Another all new - all welded boiler delivered |
Any restrictions to using this design for a new build boiler in the US? Any ASME code or FRA restrictions? This seems like such a good idea. Would this use a copper wire ring gasket for sealing the flange, or something more of a full-face composite or Teflon gasket? Howard P. |
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| Author: | E&N6004 [ Fri May 01, 2015 12:52 am ] |
| Post subject: | Re: Another all new - all welded boiler delivered |
Yes, on the NG/G-16 boilers they use a typical copper ring gasket, in a groove on the lower face, I would think that's pretty standard. No reason they could not be adapted to a more modern corrugated metal gasket. Pat |
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| Author: | robertjohndavis [ Fri May 01, 2015 10:48 am ] |
| Post subject: | Re: Another all new - all welded boiler delivered |
Kelly Anderson wrote: I guess that we can't do it in the US because it wasn't invented here. Quote of the day! |
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| Author: | Paul Boschan [ Fri May 01, 2015 11:00 am ] |
| Post subject: | Re: Another all new - all welded boiler delivered |
Howard P. wrote: Any restrictions to using this design for a new build boiler in the US? Any ASME code or FRA restrictions? This seems like such a good idea. Howard P. No restrictions at all. ASME Section VIII (pressure vessels), Divisions 1 and 2 have sections dedicated to flange design. Those rules can be used for Section I (power boiler) construction as Section I does not address flange design. |
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| Author: | softwerkslex [ Fri May 01, 2015 11:33 am ] |
| Post subject: | Re: Another all new - all welded boiler delivered |
robertjohndavis wrote: Kelly Anderson wrote: I guess that we can't do it in the US because it wasn't invented here. Quote of the day! FYI It works the other way around just as often. Seen it here. |
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| Author: | Bobharbison [ Fri May 01, 2015 12:26 pm ] |
| Post subject: | Re: Another all new - all welded boiler delivered |
OK, so the obvious question is... If there are no regulations prohibiting this, and the design works well, why hasn't it been done before? We've certainly seen all kinds of other strange designs over the years such as T boilers. Surely somebody thought of this before. My guess, and it's only a guess, is that the smaller steam dome opening provides a smaller area that needs to be sealed and prevented from leaking. The whole pi*d makes it go up quickly. 3' diameter is roughly 9.5 feet of seam. 6' diameter is nearly 19 feet of seam. Could that be the problem? |
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| Author: | Dennis Storzek [ Fri May 01, 2015 12:36 pm ] |
| Post subject: | Re: Another all new - all welded boiler delivered |
Back in the days before welded boilers were commonplace, it required a lot of additional flanging for little gain. Cheaper and easier to just hire skinny boilermaker helpers. Today, how are you going to hide that ugly bulge under the dome jacket? Or don't you care? |
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| Author: | Dave [ Fri May 01, 2015 1:10 pm ] |
| Post subject: | Re: Another all new - all welded boiler delivered |
Make the dome bigger to accomodate the flange? dave |
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| Author: | Paul Boschan [ Fri May 01, 2015 1:30 pm ] |
| Post subject: | Re: Another all new - all welded boiler delivered |
Many dome jackets already have room for a couple inches of insulation all the way around the dome. If you design your flange to match the OD of the insulation it'll fit in the existing jacket. |
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| Author: | Kelly Anderson [ Fri May 01, 2015 1:48 pm ] |
| Post subject: | Re: Another all new - all welded boiler delivered |
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