Current through March 20, 2024
Authority: IC
15-16-1-6;
IC
15-16-1-7
Affected: IC
15-16-1-10;
IC
15-16-1-11
Sec. 10.
(a) At
least one (1) qualified operator experienced in the procedures shall monitor
the transfer of ammonia from the time the connections are first made until they
are finally disconnected. Such monitoring may be performed by a person:
(1) on site;
(2) from a remote location; or
(3) by electronic means.
Capability shall be provided to halt the transfer in the
event of an emergency. This subsection does not apply to field
application.
(b)
Containers shall be filled or used only upon authorization of owner.
(c) Containers shall be gauged and charged
only in the open air or in buildings especially provided for that
purpose.
(d) Pumps used for
transferring ammonia shall be approved for ammonia service and comply with the
following:
(1) Liquid pumps may be of piston,
rotary, centrifugal, or regenerative type, designed for a minimum working
pressure of three hundred fifty (350) psig.
(2) Positive displacement pumps shall have,
installed off the discharge port, a constant differential relief valve
discharging through a line of sufficient size to carry the full capacity of the
pump at relief valve setting, which setting and installation shall be according
to pump manufacturer's recommendation.
(3) On the discharge side of the pump, before
the relief valve line, there shall be installed a pressure gauge graduated from
zero (0) to four hundred (400) psig or greater if warranted by operating
conditions.
(4) Centrifugal or
regenerative pumps do not require a bypass relief valve, but the installation
shall incorporate a line from the discharge side of the pump to the vapor space
of the supplying container and in this line, at accessible level, must be
installed a shutoff valve.
(5)
Shutoff valves shall be installed within four (4) feet of the inlet and
discharge of the pump or within a distance consistent with the manufacturer's
recommendation.
(e)
Compressors used for transferring or refrigerating ammonia shall be approved
for ammonia service and comply with the following:
(1) Compressors, except those used for
refrigeration, shall be designed for at least two hundred fifty (250) psig
working pressure. Crankcases of compressors not designed to withstand system
pressure shall be protected with a suitable pressure relief valve.
(2) Plant piping shall contain shutoff valves
located as close as practical to compressor connections.
(3) A pressure relief valve large enough to
discharge the full capacity of the compressor shall be connected to the
discharge before any shutoff valve. The discharging pressure of this valve
shall not exceed three hundred (300) psig.
(4) Compressors, except for refrigeration
units or those mounted on nurse tanks and applicators, shall have suction and
discharge pressure gauges graduated from zero (0) to four hundred (400) psig or
greater if warranted by operating conditions.
(5) Adequate means shall be provided on the
compressor suction to minimize the entry of liquid into the compressor. A
drainable liquid trap is one (1) means of providing such protection.
(f) In addition to the excess flow
valves on the liquid and vapor openings of a container (see section 5(f) of
this rule), an excess flow valve or backflow check valve shall be installed in
the piping of a system where any hose, covered by section 7 of this rule,
either is attached or may be attached. Tool bars are exempt from this
requirement. Said excess flow valves or backflow check valves shall be
installed as follows:
(1) Close to the point
where the hose and piping are joined.
(2) On the piping side of any manually
operated shutoff valve in the proximity of the hose connection, as opposed to
the hose side of the shutoff valve.
(3) With a protective weathercap, steel cap,
or steel plug (see section 6(i) of this rule) immediately installed at the end
of the piping whenever the hose has been removed from the piping.
(g) Ammonia vapors shall not be
released to the atmosphere during the transfer of liquid ammonia to containers,
including portable containers, at permanent storage locations provided,
however, that the venting of ammonia vapors at such locations through container
fittings, such as fixed liquid level gauges, rotary tube gauges, and similar
gauges during the transfer of liquid ammonia to containers, including portable
containers, shall not be prohibited. The following are requirements for
capturing ammonia vapors:
(1) Suitable means
shall be used to capture any ammonia vapors that might escape the confines of
the property boundaries for the facility during:
(A) routine bleeding of connections or lines,
depressurizing tanks for maintenance; or
(B) purging tanks subsequent to maintenance
and prior to refilling. Regarding required purging of tanks, refer to section
10(i) of this rule.
(2)
Release of ammonia vapors may be prevented by burning the vapors, by absorption
in water, or through use of minimum bleed type hose end valves. Ammonia
solutions shall be disposed in accordance with all applicable
regulations.
(3) Water tanks with
an open top large enough for human access shall not be used as a means to
capture ammonia.
(h) The
transfer of anhydrous ammonia from a tank car or transport truck to any other
unit for the purpose of converting anhydrous ammonia to aqueous ammonia shall
be done only at approved locations (see section 4(a) of this rule) having
sufficient permanent storage for the aqueous product to permit continuous and
uninterrupted unloading. The converter shall be operated in a manner such that
ammonia vapors shall not be released to the atmosphere, consistent with
subsection (g)(1).
(i) Containers
shall not be unloaded with gas pressure other than from an ammonia source. Upon
discovery or subsequent to servicing, air or other system inerts shall be
promptly purged from containers using accepted, documented practices.
