ASME Rating for Hot Water Storage Tanks
ASME Rating for Hot Water Storage Tanks
(OP)
At what operating pressure does a domestic hot water storage tank need to be ASME "stamped". I know that when a storage tank goes above 120 gallons then it required the ASME rating. The domestic hot water system in my case will be operate at 60 psi, at this pressure does the tank need to be ASME rated?





RE: ASME Rating for Hot Water Storage Tanks
Patricia Lougheed
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RE: ASME Rating for Hot Water Storage Tanks
Have a look at Section VIII, Div. 1 Part U-1 Scope. Specifically U-1(c)(2)(f) and (g).
RE: ASME Rating for Hot Water Storage Tanks
Strictly speaking, a manufacturer who only cares about a sale can turn out any piece of junk and sell it, as long as he doesn't misrepresent it as safer than it really is. A customer who is not constrained by regulations, good sense, or ethics (in an undeveloped country perhaps?) is free install the junk vessel.
Please enlighten me if I am cynically over-simplifying here. I'm kind of playing the devil's advocate.
RE: ASME Rating for Hot Water Storage Tanks
Hot water heating boiler operated at a pressure not in excess of 30 psig and having a rating not in excess of 200,000 B.T.U per hour.
Hot water supply boiler boiler that are directly fired with oil, gas or electricity when none of the following limitations are exceeded.
A. Heat input of 200,000 BTU per hour.
B. Water temperature of 200 degrees F.
C. Nomimal water containing capacity of 120 US gallons.
leem
RE: ASME Rating for Hot Water Storage Tanks
The Ontario Technical Standards and Safety Act (TSSA) boilers and pressure vessels regulation has a water heater exemption, as does CSA B51 which these provincial standards usually reference. "Vessels" containing "liquids not more hazardous than water", less than 65 C and less than 250 psig, are exempt.
RE: ASME Rating for Hot Water Storage Tanks
RE: ASME Rating for Hot Water Storage Tanks
RE: ASME Rating for Hot Water Storage Tanks
Since hot water can kill, most Jurisdictions accept/enforce ASME rules for stamping 120Gl and over at temp.
Smaller <120Gl shall meet ANSI Stds.
I'm not afraid of Steam, I am afraid of the steam the hot water produces.
GB