Harry Wade
Mon, 14 Mar 2005 10:41:50 -0800
At 12:09 PM 3/14/05 -0600, you wrote:
>1) Users may have a tendency to raise the pressure setting on their
pressure relief valves above what the factory intends.
A bad habit to get into, but even so this cannot justify a test
standard of 300% of WP.
>2) Pressure gauges are not normally checked for accuracy in the US.
So let's say a guage is out by 25% under-pressure, which in my
experience would be an extreme case, producing a PSIG (gauge reading) of
40psi when in fact the actual pressure is 50psi . . . . for that we need to
test to 160psi, 300%+ of actual WP?
>3. CYA and government regulations.
What "regulations" Accucraft or any other mfg must comply with, or
chooses to comply with, are not my concern and are not the subject of my
post. My concern is that that many rank & file Ga1 live steamers in the
U.S., in particular newcomers to live steam, will see those test figures
and get the notion that these are, or should be, recommended or standard
practice when in fact they are just as likely to be harmful.
Regards,
Harry