Boiler Examinations: 7-yearly External Query

[Paul KempParticipant @paulkemp46892]

Duncan,  one other thing I understand the Aus code limits for steel boilers anyway is operating pressure which may give the road steam fraternity a lump in the throat!  I can’t remember what the limit is and I don’t have a copy to refer to but I have 100psi in mind.  Paul with the 6” Ruston down under can confirm I am sure.  I have my Savage at 120 and it chugs along reasonably happily at 100 but primes at anything less than 80 whatever the water level if you demand a lot of steam so, if I were limited to 100 I would be close to the valves lifting all the time.

I wonder how any code would deal with the Marshall idea of no crown stays at all (rod / plate or girder) instead they pressed a Maltese cross shape into the firebox crown.  Worked well enough in full size!

Paul.

[duncan webster 1Participant @duncanwebster1]

My comments apply only to copper boilers, never built a steel one, so never investigated

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