How does the State of Washington determine the cubic foot volume (?) of a jacketed kettle under its jurisdiction?
L&I, with concurrence of the Washington State Board of Boiler Rules, measures a jacketed kettle by multiplying the outside diameter by the overall length to get the cubic foot volume. That is, the volume of the jacket including the volume of the contents of the kettle is used as the appropriate measurement. Q: What are the requirements for pool heaters within the state’s jurisdiction? A: The state of Washington does not use the term pool heater. We consider these units to be water heaters or boilers. For units sized from 0 – 200,000 Btu, L&I requires them to be built to a nationally recognized standard like AGA, ANSI, or UL. Units sized more than 200,000 Btu must be ASME Code-stamped and National Board registered. Units under 400,000 Btu are not required to meet the requirements of ASME CSD-1 part CF.
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