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Re: Union Pacific "Community Ties" Steam Update: Preparing for Boiler Testing

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M Austin

April 20, 2016 07:27PM

Registered: 16 years ago
Posts: 61

Will Gant Wrote:

"the ancients did things for a reason"

There is less room on a firebox tubesheet than a smokebox tubesheet. Almost all locomotive manufacturers tightened the pitch on the firebox tube patterns by 1/16" or more to keep the tube holes as far away from the flanges as possible. Furthermore, the force exerted by expansion of the thicker walled superheater flues require a thicker bridge than a smaller tube to eliminate cracking problems.
A 1/16" is not obvious unless you have ever layed-out a new tube sheet and can't figure out why the tube holes are half way into the flanges.

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Subject	Author	Posted
Union Pacific "Community Ties" Steam Update: Preparing for Boiler Testing	Chris Webster	April 18, 2016 08:35PM
Re: Union Pacific "Community Ties" Steam Update: Preparing for Boiler Testing	rehunn	April 18, 2016 08:35PM
Re: Union Pacific "Community Ties" Steam Update: Preparing for Boiler Testing	Tomstp	April 18, 2016 09:51PM
Re: Union Pacific "Community Ties" Steam Update: Preparing for Boiler Testing	Wayne Hoskin	April 18, 2016 10:17PM
Re: Union Pacific "Community Ties" Steam Update: Preparing for Boiler Testing	cdaspit	April 19, 2016 05:45AM
Re: Union Pacific "Community Ties" Steam Update: Preparing for Boiler Testing	pd3463	April 19, 2016 06:29AM
Re: Union Pacific "Community Ties" Steam Update: Preparing for Boiler Testing	cdaspit	April 19, 2016 06:52AM
Re: Union Pacific "Community Ties" Steam Update: Preparing for Boiler Testing	John Cole	April 19, 2016 07:37AM
Re: Union Pacific "Community Ties" Steam Update: Preparing for Boiler Testing	pd3463	April 19, 2016 08:23AM
Re: Union Pacific "Community Ties" Steam Update: Preparing for Boiler Testing	Brian Norden	April 19, 2016 08:32AM
Re: Union Pacific "Community Ties" Steam Update: Preparing for Boiler Testing	pd3463	April 19, 2016 08:44AM
Re: Union Pacific "Community Ties" Steam Update: Preparing for Boiler Testing	cdaspit	April 19, 2016 09:19AM
Re: Union Pacific "Community Ties" Steam Update: Preparing for Boiler Testing	rehunn	April 19, 2016 09:58AM
Re: Union Pacific "Community Ties" Steam Update: Preparing for Boiler Testing	Will Gant	April 20, 2016 04:56PM
Re: Union Pacific "Community Ties" Steam Update: Preparing for Boiler Testing	M Austin	April 20, 2016 07:27PM
Re: Union Pacific "Community Ties" Steam Update: Preparing for Boiler Testing	Wayne Hoskin	April 20, 2016 04:32AM
Re: Union Pacific Superheated Steam Update -	Johnson Barr	April 19, 2016 08:10PM
Re: So-Called Steam Update: Preparing for Boiler Testing	Eddy Sand	April 20, 2016 12:36PM

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