Current through Register Vol. 49, No. 9, September, 2024
2.16.2.
Net Contents. - The net
contents shall be expressed in terms of cubic meters or cubic feet, kilograms,
or pounds and ounces. See §
2.21. Liquefied Petroleum Gas for
permitted expressions of net contents for liquefied petroleum gas. A standard
cubic foot of gas is defined as a cubic foot at a temperature of 21 EC (70 EF)
and a pressure of 101.35 kilopascals (14.696 psia) except for liquefied
petroleum gas as stated in §
2.21.
2.16.3.
Cylinder Labeling. -
Whenever cylinders are used for the sale of compressed or liquefied gases by
weight, or are filled by weight and converted to volume, the following shall
apply:
2.16.3.1.
Tare weights
(a)
Stamped or stenciled tare weight.
- For safety purposes, the tare weight shall be legibly and permanently
stamped or stenciled on the cylinder. All tare weight values shall be preceded
by the letters "TW" or the words "tare weight." The tare weight shall include
the weight of the cylinder (including paint), valve, and other permanent
attachments. The weight of a protective cap shall not be included in tare or
gross weights. The Code of Federal Regulations Title 49, §
178.50 -22 requires the maker of
cylinders to retain test reports verifying the cylinder tare weight accuracy to
a tolerance of 1 percent.
(b)
Tare weight for purposes of determining the net contents. - The
tare weight used in the determination of the final net contents may be either:
(1) the stamped or stenciled tare weight
or
(2) the actual tare determined
at the time of filling the cylinder. If the actual tare is determined at the
time of filling the cylinder, it must be legibly marked on the cylinder or on a
tag attached to the cylinder at the time of filling.
(c)
Allowable difference. --If
the stamped or stenciled tare is used to determine the net contents of the
cylinder, the allowable difference between the actual tare weight and the
stamped (or stenciled) tare weight, or the tare weight on a tag attached to the
cylinder for a new or used cylinder, shall be:
(1) 1/2 percent for tare weights of 9 kg (20
lb) or less or
(2) 1/4 percent for
tare weights of more than 9 kg (20 lb).
(d)
Average Requirement. - When
used to determine the net contents of cylinders, the stamped or stenciled tare
weights of cylinders at a single place of business found to be in error
predominantly in a direction favorable to the seller and near the allowable
difference limit shall be considered to be not in conformance with these
requirements.
(e)
Liquefied
Petroleum Gas in Refillable Cylinders. When sold by weight, Liquefied
Petroleum Gas (LPG) must be weighed on an appropriate, sealed commercial scale.
A sales invoice shall be provided and shall contain at least the following
information:
a. Weight of the cylinder before
filling.
b. Weight of the cylinder
after filling.
c. The net weight of
the LPG delivered.
d. The unit
price e. The total computed price
2.16.3.2.
Acetylene gas cylinder tare
weights. - Acetone in the cylinder shall be included as part of the tare
weight.
2.16.3.3.
Acetylene
gas cylinder volumes. -The volumes of acetylene shall be determined from
the product weight using approved tables such as those published in NIST
Handbook 133 or those developed using 70 EF (21 EC) and 14.7 cubic feet (101.35
kPa) per pound at 1 atmosphere as conversion factors.
3.10. Liquefied Petroleum (LP) Gas
3.10.1. How LPG is to be Identified. -
Liquefied petroleum gases shall be identified by grades Propane, Commercial
Butane, Commercial PB Mixtures or Special-Duty Propane (HD5).
3.10.2. Retail Dispenser Labeling. - Each
retail dispenser of liquefied petroleum gases shall be labeled as
3.10.3. "Propane," "Commercial Butane,"
"Commercial PB Mixtures," or "Special-Duty Propane (HD5)."
3.10.3.
Additional Labeling
Requirements. - Liquefied petroleum gas shall be labeled with its
automotive fuel rating in accordance with 16 CFR Part 306.
3.10.4. NFPA Labeling Requirements also
apply. (Refer to the most recent edition of NFPA 58.)
3.11.
Compressed Natural Gas
3.11.1.
How Compressed Natural Gas is
to be Identified. - For the purposes of this regulation, compressed
natural gas shall be identified by the term "Compressed Natural Gas" or
"CNG."
3.11.2.
Retail Sales
of Compressed Natural Gas Sold as a Vehicle Fuel
3.11.2.1.
Method of Retail Sale.
- All compressed natural gas kept, offered, or exposed for sale or sold at
retail as a vehicle fuel shall be in terms of the gasoline liter equivalent
(GLE) or gasoline gallon equivalent (GGE).
3.11.2.2.
Retail Dispenser
Labeling
3.11.2.2.1.
Identification of Product. - Each retail dispenser of compressed natural
gas shall be labeled as "Compressed Natural Gas."
3.11.2.2.2.
Conversion Factor. -
All retail compressed natural gas dispensers shall be labeled with the
conversion factor in terms of kilograms or pounds. The label shall be
permanently and conspicuously displayed on the face of the dispenser and shall
have either the statement " 1 Gasoline Liter Equivalent (GLE) is equal to 0.678
kg of Natural Gas" or "1 Gasoline Gallon Equivalent (GGE) is equal to 5.660 lb
of Natural Gas" consistent with the method of sale used.
3.11.2.2.3.
Pressure. - CNG is
dispensed into vehicle fuel containers with working pressures of 16 574 kPa, 20
684 kPa, or 24 821 kPa. The dispenser shall be labeled 16 574 kPa, 20 684 kPa,
or 24 821 kPa corresponding to the pressure of the CNG dispensed by each
fueling hose.
3.11.2.2.4.
NFPA Labeling. - NFPA Labeling requirements also apply. (Refer to
NFPA 52.)
3.11.3.
Nozzle Requirements for
CNG. - CNG fueling nozzles shall comply with ANSI/AGA/CGA
NGV1.
3.12.
Liquefied Natural Gas
3.12.1.
How Liquefied Natural Gas is to be Identified. - For the purposes
of this regulation, liquefied natural gas shall be identified by the term
"Liquefied Natural Gas" or "LNG."
3.12.2.
Labeling of Retail Dispensers
of Liquefied Natural Gas Sold as a Vehicle Fuel
3.12.2.1.
Identification of
Product. - Each retail dispenser of liquefied natural gas shall be
labeled as "Liquefied Natural Gas."