(1) "Alteration" means a change in any item
described in the original Manufacturer's Data Report which affects the pressure
containing capability of the container. Rerating a container by increasing
maximum allowable working pressure or temperature shall be considered an
(2) "Anhydrous ammonia" means a
compound formed by the combination of the two gaseous elements, nitrogen and
hydrogen, in the proportion of one part of nitrogen to three parts hydrogen by
volume. Anhydrous ammonia is ammonia gas in compressed and liquefied form.
Anhydrous ammonia is not aqueous ammonia which is a solution of ammonia gas in
(3) "ANSI" refers to American National
Standards Institute, 1430 Broadway, N.Y., N.Y. and their publication
"Safety Requirements for the Storage and Handling of Anhydrous
Ammonia" (as adopted this lst day of January, 1982) .
(4) "Approved" means tested and recommended
by manufacturer as suitable for use with anhydrous ammonia and product so
marked, or inspected by the department and found to be in compliance with these
(5) "Appurtenances" means all devices,
such as, system devices, liquid level gauging devices, valves, pressure gauges,
fittings, metering or dispensing devices.
(6) "ASME" refers to the American
Society of Mechanical Engineers, United Engineering Center, 345 East 47th
Street, New York, New York 10017 (as adopted this 1st day of January, 1982) .
(7) "ASTM" refers to the American
Society for Testing and Materials, 1916 Race Street, Philadelphia, Pa. 19103
(as adopted this 1st day of January, 1982) .
(8) "Capacity" means the total volumetric measure.
(9) "Closed system" refers to a transfer
system which will return displaced vapor to the tank from which the liquid is
(10) "Container" means a vessel, such
as, a tank or cylinder used for the storage and handling of anhydrous ammonia.
(11) "Department" means the Montana Department
of Agriculture, Agriculture/Livestock Building, Helena, Montana 59620, (406) 444-3730.
(12) "Design pressure" means the
maximum allowable working pressure.
(13) "Filling density" means the
percent ratio of the weight of the gas in a container to the weight of water at
60 degrees Fahrenheit (F) that the container will hold. One pound H20=27.737
cubic inches at 60 degrees F. For determining the water capacity of the tank in
pounds, the weight of a gallon (231 cubic inches) of water at 60 degrees F in
air shall be 8.32828 pounds.
(14) "Filling volume" is defined as the
percent ratio of the liquid in a container to the volume of the container.
(15) "Free vented" as used means the
system is permanently open to the atmosphere. No shutoff or check valve is
allowed in such opening.
(16) "Gas" means anhydrous ammonia in
either the gaseous or liquefied state.
(17) "Gas mask" means a gas mask
approved by the Bureau of Mines (30CFR Part II, Section 14-f) .
(18) "Hold-down devices" refers
to chains or metal straps or cables.
(19) "Hold to a minimum" means the
product should be loaded in anticipation of sale into the nurse tanks and
delivered to the consumer for use without being stored in nurse tanks waiting
for a consumer order.
(20) "Hydrostatic relief valve" refers
to an automatic pressure activated valve for liquid service characterized by
throttle or slow weep opening (non-pop off action) .
(21) "Implement of husbandry" means a
farm wagon-type tank vehicle of not over 2000 gallons capacity, used as a
field storage nurse tank supplying the anhydrous ammonia to a field applicator,
and moved on highways only for transporting anhydrous ammonia from a local
source of supply to farms or fields or from one farm or field to another.
(22) "Institutional occupancy" is a
location where people may be unable to vacate voluntarily and shall be deemed
to include nursing homes, hospitals, jails, and schools.
(23) "Material suitable for use"
includes iron, steel and certain non-ferrous alloys which are compatible
for use in anhydrous ammonia service. Copper, brass, zinc and certain alloys,
especially those containing copper, are not suitable for anhydrous ammonia
(24) "Nitrogen fertilizer solutions"
refers to compounds (ammonium nitrate, urea, sodium nitrate, and other nitrogen
carriers) formed by the combination of free ammonia and water with or without
other nitrogen salts. Nitrogen fertilizer solutions includes all liquid
containing more than 2 percent free ammonia and/or having 5 psig. It does not
include material containing over 1 percent of phosphorous and/or potassium
which is used as plant food. The term "nitrogen fertilizer solution"
should be substituted in lieu of the term "anhydrous ammonia" where
it appears in these definitions for references made in rules specified in ARM
4.12.701 for rules specifically pertaining to nitrogen fertilizer solutions.
(25) "Pressure vented" is a system
equipped with a pressure relief valve or a combination pressure-vacuum
(26) "Private assembly" is a location
where people gather together but is not generally open to the public.
(27) "Psig" and "Psia" means
pounds per square inch gauge and pounds per square inch absolute, respectively.
(28) "Public assembly" is a location
that is generally open to the public and where people gather together,
including but not limited to, churches, public halls, libraries, clubs and
(29) "Qualified attendant" means a person
who has a knowledge of the characteristics of anhydrous ammonia, its safe
handling, safety rules for transfer and application, and has completed an
anhydrous ammonia training program conducted by the department or an equivalent
training program approved by the department.
(30) "Repair" refers to the work
necessary to restore a container or system to a safe and satisfactory operating
condition provided that in all cases the container or system design shall
continue to comply with the requirements of this standard, or the standard in
effect at the time of installation, that special service requirements do not
restrict such work and the basic design concept of the system is not altered.
(31) "Safety relief valve" or "pop
off valve" is an automatic pressure activated valve for vapor service
characterized by pop action upon opening.
(32) "Secured valve" is a valve which
is locked, plugged or capped.
(33) "Semi-trailer" refers to a
vehicle designed for carrying anhydrous ammonia, which is drawn by a motor
vehicle, and so constructed that some part of its weight and that of its load
rests upon or is carried by another vehicle.
(34) "System" refers to an assembly of
equipment consisting essentially of the container(s) , appurtenances, pumps,
compressors, and interconnecting piping.
(35) "Tank" means a vessel designed and
constructed for the storage and handling of anhydrous ammonia.
(36) "Tank motor vehicle" means any
motor vehicle designed or used for the transportation of anhydrous ammonia in
any tank designed to be permanently attached to any motor vehicle or any
container not permanently attached to any motor vehicle which by reason of its
size, construction or attachment to any motor vehicle must be loaded or
unloaded without being removed from the motor vehicle.
(37) "The code" refers to the Unfired
Pressure Vessel Code of the American Society of Mechanical Engineers (Sec.
4.12.708 of the ASME Boiler Construction Code) , including editions through 1981
or the Joint Code of the American Petroleum Institute and the American Society
of Mechanical Engineers (API-ASME Code) including editions through 1981
(adopted this 1st day of January, 1982) .
(38) "Vacuum" refers to ounces per
square inch of pressure below atmospheric pressure.
(39) "Vapor pressure" unless otherwise
specified, shall refer to the pressure developed by the solution at temperature
(40) "Wet hose" is an anhydrous hose with shut-off valves at
each end and is capable of containing liquid product at all times.
History: Sec. 80-10-503, MCA; IMP, Sec. 80-10-503, MCA; NEW, 1986 MAR p. 1820, Eff. 10/31/86.