California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 2 - Boiler and Fired Pressure Vessel Safety Orders › Article 2 - Definitions › Section 753 - Definitions

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
Age: Period of time since date of manufacture or nearest
						estimate if date of manufacture is unknown.
ANSI Standards: Standards approved as American National
						Standards by the American National Standards Institute, Inc.
Appurtenance A device installed on and used in the normal
						operation of the boiler. This includes the piping between the boiler and
						device, but does not include piping beyond that point unless specifically
						required elsewhere in these Orders.
ASME: The American Society of Mechanical Engineers.
						Automatic Safety Shutdown Devices: Safety controls (other than operating
						controls) which monitor certain essential operating conditions of a fired
						boiler and which will shut down the boiler in the proper sequence when any of
						the essential conditions vary from set limits and require the services of the
						attendant to place the boiler back in operation.
Automatically Controlled Boiler: A boiler equipped with
						devices to maintain the burner firing conditions, the pressure and/or
						temperature, and the water level or water content within the predetermined
						limits without manual manipulation.
Boiler: A fired or unfired pressure vessel used to
						generate steam pressure by the application of heat. (This definition is
						intended to include "steam generators" and "forced-circulation boilers" but
						excludes "unfired evaporators.") [Note definition of: Code Boiler, High
						Temperature Water boiler, Low Pressure Boiler, Miniature Boiler, Nuclear
						Boiler, Power Boiler, Secondhand Boiler].
Certificate of Competency: Certification issued by the
						Division to persons who have satisfactorily passed the written boiler
						inspector's examination prescribed by the Division.
Certified Inspector: a person who is qualified to make
						inspections or examinations of boilers or tanks according to the rules under
						which the vessel is constructed, who has an unrevoked certificate of competency
						issued pursuant to this part, and who is employed by any one of the
						following:
A county.
A city
An insurer.
An employer, for the purpose of inspecting only tanks and
						boilers under his jurisdiction.
Code: The applicable sections of the ASME Boiler and
						Pressure Vessel
Code and of the ANSI Standards.
Power Boilers. Section I, 1977 edition, (except PG-39 and
						PW-35 for which the 1974 edition will be used).
Material Specification, Section II, 1977 edition.
Nuclear Power Plant Components, Section III, 1977
						edition, Division 1 and 2 (except NB/NC/ND-3612(a)(3), for which the 1974
						edition will be used).
Heating Boilers, Section IV, 1977 edition.
Pressure Vessels, Section VIII, 1977 edition.
Welding and Brazing Qualifications, Section IX, 1977
						edition.
Rules for In service Inspection of Nuclear Power Plant
						Components, Section XI, 1977 edition.
Power Piping, ANSI B 31, 1, 1977 edition (except
						nonmetallic pipe such as plastic is not acceptable unless permitted by specific
						safety orders).
Code addenda shall become effective six months after the
						date of issuance unless exception to specific parts thereof are made in the
						interim by the Division.
Code Boiler: a boiler constructed, inspected, and stamped
						as required by the code.
Division: Division of Industrial Safety.
Evaporator: An apparatus, usually closed, for driving off
						superfluous liquid, as in concentration plants for sugar and syrup, in fruit
						drying, etc., or for evaporating liquid for subsequent condensation to purify
						it, as from salts held in solution.
Existing Installations: Boilers installed in California
						prior to the adoption of these orders and in compliance with the safety orders
						of the Division in effect at the time of installation.
External Inspection: An inspection of all visible
						external surfaces and appurtenance of an installed boiler or fired pressure
						vessel. Where practicable this inspection shall be made with the boiler in
						operation to permit the inspector to witness the operation of the
						controls.
Field Inspection: An inspection of an installed boiler or
						fired pressure vessel.
Fired Pressure Vessel: A metallic vessel other than a
						boiler in which vapor pressure is generated in excess of 15 psi by direct
						firing with a solid, liquid, or gaseous fuel or by electric heating elements.
						(This does not apply to a coil or tubular section in which a fluid or other
						product is being continuously circulated by means of a pump or other mechanical
						device, provided the pipes or tubes do not exceed 6-inch size.)
Full Safety Pilot Control: A control that will shut off
						the fuel to the main burner and to the pilot burner and require manual
						resetting if:
The pilot burner flame should be extinguished, or
In the case of spark ignition, the main burner fails to
						light after 1 recycle of operation of the ignition mechanism.
High Temperature Water Boiler: A fired or unfired
						pressure vessel used to heat water to temperatures above 212° F. At
						pressure exceeding 160 psi or to temperatures exceeding 250° F regardless
						of pressure.
Internal Inspection: Inspection of all accessible
						internal and external surfaces of a boiler or fired pressure vessel and its
						appurtenances.
Low-pressure Boiler: A boiler which does not:
Operate at steam pressure or with steam safety valve
						settings exceeding 15 psi (low-pressure steam boiler), or
Operate at water pressure exceeding 160 psi or water
						temperatures exceeding 250° F (hot water heating boiler).
This definition is not intended to include domestic type
						water heaters provided all of the following are complied with:
The heater does not have more than 120-gallon water
						capacity.
The heater is used only for heating service water.
The operating control on all automatically controlled
						heaters is installed by the manufacturer and is of a type that cannot be
						regulated to increase the water temperature at the top of the heater to more
						than 200° F.
A non-adjustable control is installed on all
						automatically controlled heaters by the manufacturer and set to shut off the
						heat input when the temperature at the top of the heater is 210° F or less.
						This control and the necessary fuel valve, switch, etc., shall be separate from
						the operating mechanisms required in (C) above.
Automatically controlled gas or oil fired heaters shall
						have a safety pilot mechanism installed by the manufacturer and so arranged
						that fuel will be shut off to both the main burner and pilot burner in case of
						failure of the pilot burner flame or of the spark igniter.
The heater is approved by the American Gas Association or
						other testing laboratory acceptable to the American National Standards
						Institute.
The heater is protected against over-pressure than the
						maximum allowable working pressure of the heater and having a relieving
						capacity in BTU/hr at least equal to the burner output.
Coil-type swimming pool heaters at places of employment
						rated at or below 400,000 BTU/hr input need not be considered boilers provided
						all of the following conditions are complied with:
They are used to heat pool water to a maximum temperature
						of 140° F, with a maximum pressure stamping of 150 psi.
The inside diameter of the tubes shall not exceed
						1/8".
The water volume within the casing does not exceed 6
						gallons.
Pool heaters with 200,000 BTU/hr input and less need not
						be ASME Code, but shall be built to good engineering practice, and have a
						minimum factor of safety of 4.
They shall have an ASME Code safety valve rated at the
						full BTU output, and set at or below the stamped maximum allowable working
						pressure of the heater.
The maximum voltage of the control circuit shall be 120
						volts.
The burner shall have a safety pilot mechanism installed
						by the manufacturer that will shut off the fuel to both the main burner and
						pilot burner in case of failure of the pilot burner or of the spark ignitor.
						The maximum time until the fuel valve is fully closed shall be 90 seconds for
						burners not exceeding 400,000 BTU/hr input.
There shall be a flow switch or low water pressure switch
						installed by the manufacturer within the heater casing to monitor flow through
						the coil.
There shall be a high temperature limit switch set below
						the boiling point at atmospheric pressure. This is in addition to the operating
						temperature control, set at 140° F.
There shall be two main burner fuel valves piped in
						series, or a single fuel valve having two seats.
Coil-type steam vapor cleaners need not be considered as
						boilers provided all of the following conditions are complied with:
The larges nominal pipe or tubing size is ¾," and
						has no drums or headers attached. They shall be built to good engineering
						practice with a factor of safety of at least 4.
The nominal water containing capacity does not exceed 6
						gallons.
A non-adjustable high limit temperature control shall be
						set to operate at or below 350°F.
Steam is not generated within the coil.
A safety valve set at or below the stamped maximum
						allowable working pressure, with relief capacity at least equal to the BTU
						output of the burner, shall be installed near the outlet.
The burner shall have a safety pilot mechanism installed
						by the manufacturer that will shut off the fuel to both the main burner and
						pilot burner in case of failure of the pilot burner or of the spark ignitor.
						The maximum time until the fuel valve is fully closed shall be 90 seconds for
						burners not exceeding 400,000 BTU/hr input.
Miniature Boiler: A boiler which does not exceed any of
						the following limits:
16 inches inside diameter of shell.
5 cubic feet gross volume, exclusive of casing and
						insulation. (This volume includes the total volume of the steam and water
						containing parts of the boiler plus the volume of the combustion space and gas
						passages up to the point of attachment of the smokestack or chimney
						breeching.)
20 square feet water heating surface.
100 psi maximum allowable working pressures.
National Board: The National Board of Boiler and Pressure
						Vessel Inspectors.
New Installations: Boilers and fired pressure vessels
						installed or reinstalled after the effective date of these Orders.
Nuclear Boiler: A device consisting of a vessel or system
						of vessels in which nuclear fuel is present and a nuclear chain reaction may
						take place or in which the reactor coolant is circulated for the purpose of
						heating a fluid for generating useful energy. Such nuclear boiler shall include
						the interconnecting piping up to and including the required valve or valves
						needed to isolate the vessel or system of vessels.
Oil Field Recovery Heater: A forced-circulation,
						once-through, water tube steam generator, used only in oil field thermal
						recovery operations, having no fired pressure parts larger than 4-inch pipe
						size and no other pressure part larger than 6-inch pipe size.
Power Boiler: Steam boiler operated at pressure exceeding
						15 psi.
Proved Pilot: a device that will not permit the fuel
						valve to the main burner to open until a proper source of ignition is
						established to light the main burner.
Psi: Pounds per square inch gage.
Qualified Inspector: Either a certified inspector or
						qualified safety engineer.
Qualified Safety Engineer: A person who is qualified to
						make inspections or examination of boilers or tanks according to the rules
						under which the vessel is constructed and who holds a valid certificate of
						competency issued by the Division.
Relief Valve: An automatic pressure relieving device
						actuated by the static pressure upstream of such device which opens further
						with the increase in pressure over the opening pressure. It is used primarily
						for liquid service.
Resale Inspection: The inspection of any used boiler to
						determine its maximum allowable working pressure when reinstalled in accordance
						with these Orders.
Safety Relief Valve: An automatic pressure actuated
						relieving device suitable for use either as a safety valved or relief valved,
						depending on application.
Safety Valve: An automatic pressure relieving device
						actuated by the static pressure upstream of such device and characterized by
						full opening pop action. It is used for gas or vapor service.
Secondhand Boiler: A boiler that has changed both
						ownership and location.
Shop Inspection: Inspection of boilers and fired pressure
						vessels in a fabricator's shop, or at the jobsite during erection, as required
						by the Code.
1.
						Repealer of subsection (e-2) and amendment of subsection (s-4) filed 8-12-76;
						effective thirtieth day thereafter (Register 76, No. 33). for prior history,
						see Register 75, No.6
2. Amendment filed 6-15-79; effective
						thirtieth day thereafter (Register 79, No. 24).
3. Amendment filed
						5-28-81; effective thirtieth day thereafter (Register 81, No.
						22).
4. Editorial correction of printing error in Internal
						Inspection (Register 92, No. 29).
Note: Authority cited: Section
						  142.3, Labor
						  Code. Reference: Section
						  142.3, Labor
						  Code.