Jim Dunmyer said the following to Mike Ross on the subject of
RE: POWER SOURCE/PUMP (23 Jan 98  07:46:08)
N
 > There are many types of radiator heating among which is high pressure
 > steam as you noted. Generally high pressure steam is used for larger
 > dwellings such as multi-apartment housing.
 JD> I was responsible for maintaining a couple of buildings in my previous
 JD> job. One was a factory of 170,000 square feet, the other a 10-story
 JD> building of 300,000 square feet. Both had low-pressure steam boilers.
 JD> The factory boiler operated at 10 PSI, the tall building at 5 PSI or
 JD> so.
 JD> Dunno the details of the regulations in all locales, but I think that
 JD> anything under 15 PSI is considered "Low Pressure" and the operator
 JD> liscensing requirements are MUCH more lenient than for high-pressure
 JD> boilers. It takes quite a lot of study to get a liscense for the
 JD> latter; my wife had to get one when she worked for Sun Oil Company and
 JD> she spent a fair amount of time studying. The guy who held the
 JD> liscense for the low pressure boilers where I worked wasn't smart
 JD> enough to EVER get a high-pressure liscense.
I vaguely remember coming across a furnace once that I think vented
steam and condensate to the atmosphere instead of recirculating it. That
could have only meant it was rather low pressure. As far as I understand
boilers, if it uses a safety relief valve, it requires some IQ and a
license to fix it.
... Ice Storm of '98 refugee.
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