Boiler Pressure Change on Class J's

[NW Mailing List]

Dave,

The date for the change in the Classification Books was October 4, 1945. 
That is good enough for me.

Bud Jeffries

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From: "NW Mailing List" <nw-mailing-list at nwhs.org>
To: "NW Mailing List" <nw-mailing-list at nwhs.org>
Sent: Sunday, January 02, 2011 11:54 AM
Subject: Boiler Pressure Change on Class J's



> Is there a record of when the BP of Class J's 600-610 was raised from 275 

> psi to 300 psi?  I've always used  "after 8/45" because of the 275/300 

> comparison tests run during that month.  I may need to be more specific so 

> I'm looking for better info.

>

> Dave Stephenson

>

>

>

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>

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