[Code of Federal Regulations]
[Title 49, Volume 2]
[Revised as of October 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR173.303]

[Page 559]
 
                        TITLE 49--TRANSPORTATION
 
 CHAPTER I--RESEARCH AND SPECIAL PROGRAMS ADMINISTRATION, DEPARTMENT OF 
                             TRANSPORTATION
 
PART 173--SHIPPERS--GENERAL REQUIREMENTS FOR SHIPMENTS AND PACKAGINGS--Table of Contents
 
               Subpart G--Gases; Preparation and Packaging
 
Sec. 173.303  Charging of cylinders with compressed gas in solution (acetylene).

    (a) Cylinder, filler and solvent requirements. (Refer to applicable 
parts of Specification 8 and 8AL). Acetylene gas must be shipped in 
Specification 8 or 8AL (Sec. 178.59 or Sec. 178.60 of this subchapter) 
cylinders. The cylinders shall consist of metal shells filled with a 
porous material, and this material must be charged with a suitable 
solvent. The cylinders containing the porous material and solvent, shall 
be tested with satisfactory results in accordance with CGA Pamphlet C-
12. Representative samples of cylinders charged with acetylene shall be 
tested with satisfactory results in accordance with CGA Pamphlet C-12.
    (1) The specific gravity of acetone solvent in acetylene cylinders 
must be 0.796 or over at 15.5  deg.C. (59.9  deg.F.).
    (2) The amount of solvent added in the refilling operation must not 
cause the tare weight of the cylinder to exceed its marked tare weight. 
The tare weight includes the weight of the cylinder shell, porous 
filling, valve, safety relief devices and solvent, but without removable 
cap.
    (b) Filling limits. The pressure in cylinders containing acetylene 
gas must not exceed 250 psig at 70  deg.F., and in case the cylinders 
are marked for a lower allowable charging pressure, at 70  deg.F., then 
that pressure must not be exceeded.
    (c) Data requirements on filler and solvent. Cylinders containing 
acetylene gas must not be shipped unless they were charged by or with 
the consent of the owner, and by a person, firm, or company having 
possession of complete information as to the nature of the porous 
filling, the kind and quantity of solvent in the cylinders, and the 
meaning of such markings on the cylinders as are prescribed by the 
Department's regulations and specifications applying to containers for 
the transportation of acetylene gas.
    (d) Verification of container pressure. (1) Each day, the pressure 
in a container representative of that day's compression must be checked 
by the charging plant after the container has cooled to a settled 
temperature and a record of this test kept for at least 30 days.
    (e) Prefill requirements. Before each filling of an acetylene 
cylinder, the person filling the cylinder must visually inspect the 
outside of the cylinder in accordance with the prefill requirements 
contained in CGA Pamphlet C-13, Section 3.

[29 FR 18743, Dec. 29, 1964. Redesignated at 32 FR 5606, Apr. 5, 1967]

    Editorial Note: For Federal Register citations affecting 
Sec. 173.303, see the List of CFR Sections Affected which appears in the 
Finding Aids section of the printed volume and on GPO Access.

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