Some time ago there was a question regarding up-coming changes in Pennsylvania (state)boiler inspections.

I just got this the other day, and hope it makes the mud a little clearer for somebody. my notes/questions are in ( ) and not part of the original letter. From what I can see, it expands the (officially non-existant) "inspector's discretion" in some areas and ties his hands in others. It is pretty much what we expected, except for a few grey areas, which will be ironed out over time. The answer seems to be; NO draconian changes... at least for now.

DATE: March 29, 2002
TO: All Certified Boiler Engineers
FROM: John D. Payton, Director Boiler Section
SUBJECT: Antique Boiler & Tractor Engines

Inspection activities may continue on Antique Boilers using the basic training that was given in the field. If during the inspections you find thinning, you are directed to take UT readings to map the thin (his word, not suspect, but "thin") area. The map should have the pitch of the bolts and comments on the general condition of the crown sheet (what if the suspect area is elsewhere, like a tube sheet,or belly?). It is expected that many of the Boilers will pass a visual inspection without UT readings. However if you are in doubt, take the readings. The final calculations will be conducted by the Department and the MAWP established, based on the condition of the boiler. (Still no word on whether there will be extra costs for any UT)

In accordance with the NIBC pitting, if not active, should not restrict operation; however this must be evaluated ona case by case basis. The greatest concern for thinning is in the area of highest stress and will be the area of most pronounced thinning.

If during your visual inspections you think that you have thinning, use your UT meter to verify the thickness of the area. If you havethinninginthe staybolts you must evaluate the remaining diameter of the bolt and number ofbolts that have been reduced. A drawing showing the pattern and pitch will help to evaluate the boiler. All these things will affect the operating pressure (rather obvious IMO). Keep in mind that if the stay bolts have been seal welded it may mask the true thickness of the crownsheet. Because of the masking of the crown thickness. it is not recommended that the crown stay bolts be welded.(But, what if they are? and have been there for the last 20 years?)

It is of great concern that we protect the public, but we must also not abuse the power entrusted to us. Encourage antique boiler owners to start inspections early to allow time to complete repairs when required. Be polite couteous, and always explain your actions.

Any typos or lack of proper spacing (due to a dirty keyboard) are mine. Any ambiguous word choices are the author's.