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Pressure
Vessel Permits
The
following information has been summarized from the Los Angeles
Municipal Code to make it easier to understand the intent
of the code.
A
Pressure Vessel installation permit is required to erect,
install, use or operate any of the following equipment. Periodic
inspections and subsequent operating permits are also required.
Boilers
Tanks
Vessels
Liquid Propane Gas
Repair
Exemptions
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Boilers |
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1.
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CASE
IRON SECTIONAL - A cast iron boiler generally used for
water heating or low pressure steam. |
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2.
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ELECTRIC
BOILER - A boiler that produces steam or hot water that
uses an electric heating element for heat energy. |
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3.
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HIGH
PRESSURE FIRE TUBE - A boiler that produces steam over
15 psi. The flame is applied on the inside of the boiler
tubes. The water is on the outside of the tubes. |
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4.
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HIGH
PRESSURE WATER TUBE - A boiler that produces steam over
15 psi. The flame is applied on the outside of the boiler
tubes. The water is on the inside of the boiler tubes. |
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5.
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HOT
WATER BOILER - A boiler that is used to heat water. The
gas input is over 400,000 BTU. |
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6.
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HOT
WATER HIGH TEMP - A boiler that is used to heat water
to a high temperature, up to 212 degree F. |
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7.
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HOT
WATER SUPERHEAT - A boiler that heats water to a superheated
condition above the boiling point but not released to
form steam. |
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8.
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LOW
PRESSURE BOILER - A boiler that produces steam up to 15
psi. |
If
a boiler is outdoors and the vent stack is within 10 ft of
the building or the boiler is indoors an additional mechanical
permit is required for the vent.
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Tanks |
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1.
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AIR
TANK - A tank used for the storage of compressed air.
Also called an air compressor or compressor. Air tanks
1.5 cu. ft. or less with safety valves set at 150 psi
or less are exempt. |
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2.
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AMMONIA
TANK - A tank used to store or distribute anhydrous ammonia
under pressure. Refrigeration systems are exempt. |
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3.
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COMPRESSED
NATURAL GAS - A tank used to store or distribute natural
gas under extreme pressure generally over 1,000 psi. |
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4.
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LIQUID
NATURAL GAS - A tank used to store or distribute liquid
natural gas. |
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5.
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LIQUID
PETROLEUM GAS - A tank over 125 gallons used to store
and or distribute liquid petroleum gas usually propane.
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6.
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HOT
WATER STORAGE - A tank over 120 gallons used to store
hot water generally over 120 degrees F. |
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7.
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HYDRO
PNEUMATIC - A tank used to store water under pressure.
A pressurized air space is above the water in the tank. |
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8.
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UNFIRED
PRESSURE VESSEL - A tank or a pressurized object that
contains vapor where the pressure exceeds 15 psi. |
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9.
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VACUUM
TANK - A tank that contains substances under a negative
pressure. |
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Vessels |
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1.
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AUTOCLAVE
- A pressure vessel that is generally heated by steam
and has a door or opening designed to withstand pressure.
Objects can be placed inside or removed when the pressure
is released. |
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2.
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AUTO
HOIST An in ground or above ground device that is used
to raise a vehicle entirely off the ground while work
is being performed on the vehicle. |
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3.
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CLOTHES
PRESS - A device that is used to steam press clothes |
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4.
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STREAM
KETTLE - A pressure vessel that is generally steam jacketed
and that is used to heat substances in the liquid state.
The pressure is in the jacket |
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5.
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STEAM
MANGLE - A roller type device that is heated by steam
generally used to press or flatten other objects |
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6.
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STERILIZER
- A pressure vessel that is used to sterilize objects
by the application of steam heat under pressure. |
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7.
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SURGE
TANK - A tank that is not pressurized but contains vapor
or air and is closed. It is used to relieve the surge
pressure on a liquid system. The pressure is derived from
the liquid flow into it. |
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8.
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VULCANIZER
- The same as an autoclave but is used to heat substances
so that they may be pressed together. |
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Liquid
Propane Gas
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1.
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Before
a pressure vessel permit is issued for an LPG tank, a
plot plan must be obtained and approved "subject
to field inspection" from the Fire Department |
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2.
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For
vertical propane tanks a plan check and building permit
shall be required for the support footings with regards
to seismic and wind loads and for fire protection on the
support legs or skirt. |
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| Repair
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1.
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The
Pressure Vessel Group must be notified prior to the commencement
of any welded repair to a boiler or pressure vessel. The
competed repair must show compliance with Title 8 of the
California Code of Regulations, including welder qualification
and the Authorized Inspectors approval. |
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Air
tanks that are 1.5 cubic feet or less and have safety
valves set to open at 150 psi or less. |
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Pressure
vessels used in air conditioning systems. |
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Ammonia
tanks that are in refrigeration service. |
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Ammonia
tanks where the ammonia is not in the anhydrous state. |
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Carbon
dioxide and nitrogen tanks. |
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DOT
cylinders |
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Cold
water storage tanks that are not part of a buildings fire
system. |
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Hot
water storage tanks in which none of the following are
exceeded: (1)120 gal., (2)120 degrees F., (3)160 psi.,
(4) 400,000 BTU. |
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Boilers
and Pressure Vessels on trucks and trailers that can change
location. (State Jurisdiction) |
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