from the time it is delivered until the time
it is emptied and ready for return. G&I
1. Hazardous Materials Regulations of the
Department of Transportation, 49CFR
Parts 171-180, R. M. Graziano Tariff, issued by R.M. Graziano, Agent, 1920 “L”
St. N. W., Washington, D.C. 20036
2. Handbook of Compressed Gases (
Reinhold Publishing Corp., N. Y., 1985).
3. Gas Data Book (MATHESON Gas Products, East Rutherford, N.J., 1971), 6th ed.
4. Compressed Gases, Safe Practices Pamphlet No. 95, National Safety Council,
Chicago, IL.
In our next installment, we will discuss
among other topics, Receipt and Content
Identification, Storage and Transportation.
This material is reproduced with permission
from MATHESON, www.mathesongas.com
215-648-4026
LETTERS TO
THE EDITOR
Gases & Instrumentation
accepts letters
commenting on
published articles or
general comments on
the gases industry.
PAUL NESDORE
Publisher /Editor
Gases & Instrumentation
pnesdore@gasesmag.com
781-431-7168
other required tests to approve the cylinder
under DOT specifications is shown by ( 11).
Filling
Nonliquefied gases may be filled to the
service pressure marked on a cylinder. These
markings will appear on the shoulder of
the cylinder, i.e., DOT3AA-2265, indicating
that the cylinder has been manufactured
in accordance with DOT specifications 3AA,
and the cylinder filling pressure is 2265 psi
at 70°F. At present, DOT regulations permit
a 110% filling for certain non-liquefied,
non-flammable gases. Liquefied gases, on
the other hand, must be filled to a filling
density. This filling density represents the
maximum weight of the material permitted
in the cylinder, as a percentage of the water
capacity of the cylinder. Since compressed
gas cylinders are handled by a number of
different types of plant personnel, consider
the precautions to be taken in handling
