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service life of heating water system piping

service life of heating water system piping

service life of heating water system piping

(OP)
Would be interested in opinions, reference information and experiences regarding service life of schedule 40 black iron pipe in 180F heating water systems.

RE: service life of heating water system piping

Is that like the crap in my father's house which dates back to 1926?  If so, then it's on the order of about 20-30 yrs.

TTFN

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RE: service life of heating water system piping

If it's been chemically treated properly, flushed and cleaned on initial fill, and the system is flushed and cleaned every few years, and the pipe velocities are below 8 feet per second on the big pipes and less than 6 feet per second on the smaller pipes, then one should expect at least 75 years of useful service life, and even longer.  I've seen heating pipe that came out of a 1910 vintage building here that we did renovations on, and it was till in service and working fine.

RE: service life of heating water system piping

What there absolutely MUST NOT be, is any amount of make-up water. If the system is kept tight, and essentially leak free, then it should last indefinately. If you're talking about a relatively small (residential) hot water heating system, then water treatment is typically not needed.

RE: service life of heating water system piping

ASHRAE has a table that lists "average" service life of common components like boilers and chillers, not sure about systems.  Lots of variables...

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