Definitions

Seattle Mun. Code § 6.420.030

in effect

6.420.030 - Definitions Words and phrases used in this Chapter 6.420 have the following meanings: "Boiler" means a closed vessel in which water is heated, steam is generated, steam is superheated, or any combination thereof, under pressure or vacuum by the direct application of heat. The term "boiler" also includes fired units for heating or vaporizing liquids other than water where these systems are complete within themselves. "Boiler plant" means one or more boilers and connecting piping and vessels within the same premises. "Boiler supervisor" means a steam engineer Grade I, II, or III who has passed additional examinations as required by the Director pursuant to the provisions of this Chapter 6.420. "BHP" means brake horsepower. "Certified automatic boiler" means a boiler equipped with certain controls and limit devices as required by the Seattle Boiler Code, and for which the Director has finalized an Automatic Certification Application Permit. "Certified monitored boiler" is a certified automatic boiler that meets the requirements of the Seattle Boiler Code and for which the Director has finalized a Monitored Certification Application Permit. "City Boiler Inspector" means a City of Seattle Boiler/Pressure Systems Inspector employed by the Department. "Department" means the Seattle Department of Construction and Inspections. "Director" means the Director of the Seattle Department of Construction and Inspections and authorized representatives. "Hoist and portable boiler" means a boiler used to provide steam for the operation of various types of equipment such as floating cranes, piledrivers, and other similar types of equipment used in the construction industry. "Hot-water supply boiler" is a boiler having a volume exceeding 120 gallons, or a heat input exceeding 200,000 BTU per hour, or a water temperature exceeding 210 degrees Fahrenheit but not exceeding a temperature of 250 degrees Fahrenheit, and a pressure not exceeding 160 psi, that provides hot water to be used externally to itself. "kBtuh" means thousand BTU per hour. "Low-pressure hot-water heating boiler" is a boiler from which hot water is circulated for heating purposes at pressures not exceeding 160 psi and temperatures not exceeding 250 degrees Fahrenheit, that provides hot water to be used externally to itself. "Low-pressure steam-heating boiler" is a boiler furnishing steam at pressures not exceeding 15 psi. "Nonregenerative system" is a system in which the heat rejected by an engine is lost to the atmosphere. "Out of service." A boiler is "out of service" if it is manually shut down for inspection, maintenance, or repair, except for limited repairs and adjustments as set forth in Section 6.420.120. "Potable water heater" (fired, electric, solar, and indirect) is a closed vessel in which water is heated by the combustion of fuels, electricity, or any other source, and withdrawn for use external to the system. Potable water heaters do not exceed any of the following criteria or capacities: a nominal water-containing capacity of 120 gallons, a heat input of 200,000 BTU per hour, an operating temperature of 210 degrees Fahrenheit, and a pressure of 160 psi. "Power hot-water boiler" (high-temperature water boiler) is a boiler used for heating water or liquid to a pressure exceeding 160 psi or to a temperature exceeding 250 degrees Fahrenheit. "Power steam boiler" is a boiler in which steam or other vapor is generated at pressures exceeding 15 psi. For purposes of this Chapter 6.420, the term shall not include a small power boiler. "psi" means pounds per square inch. "Regenerative system" is a system in which the heat rejected by an engine is used in a boiler. "Seattle Boiler Code" is the Seattle Boiler and Pressure Vessel Code, as listed in Section 22.101.010. "Small power boiler" is a power steam boiler with pressures not exceeding 150 psi and not exceeding 800,000 BTU per hour heat input. "Steam engine" means all prime movers using vapors from a boiler for motive power, steam-driven compressors, and steam pumps except steam pumps and similar auxiliaries used only as appurtenances for the operation of a boiler. (Ord. 126359, § 1, 2021; Ord. 126278, § 9, 2021 [cross-reference update]; Ord. 124919, § 25, 2015 [department/department head name change and style cleanup]; Ord. 122115, § 2, 2006.)

Source: City of Seattle, Seattle Municipal Code and City Charter (Municode Library, library.municode.com)URL: https://library.municode.com/wa/seattle/codes/municipal_code?nodeId=TIT6BURE_SUBTITLE_IVNELICO_CH6.420STENBOOP_6.420.030DEFetched: 11/1/2026