MIL-DTL-3701F
COMPRESSED GAS ASSOCIATION (CGA)
CGA TB-17
- Test Methods for Evaluating Paints and Coatings on
Refillable Steel Compressed Gas Cylinders
(Copies of this document are available at https://www.cganet.com/ or from Compressed Gas
Association, 4221 Walney Road, 5th Floor, Chantilly, VA 20151-2923.)
2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event
of a conflict between the text of this document and the references cited herein, the text of this
document takes precedence. Nothing in this document, however, supersedes applicable laws and
regulations unless a specific exemption has been obtained.
3. REQUIREMENTS
3.1 Construction. The acetylene cylinders shall conform to the specifications for DOT-8
or DOT-8AL cylinders in accordance with 49 CFR 178.59 and 178.60. The cylinders shall be
within the dimensions specified in table I in accordance with figure 1. The cylinders shall be
stable in the upright position. Foot rings formed and welded to convex bottom designs or rolled
from the extended side walls of cylinders of unit construction using concave bottom designs
shall have a minimum of two ventilation holes and two drainage holes equally spaced in the
circumference. The porosity of the filler shall exceed 83 percent of the total cylinder volume.
3.2 Acetone. The acetone shall be of technical grade conforming to ASTM D329. Acetone
infiltration of the filler shall be at least 97 percent of the maximum level permitted by 49 CFR 178.59
and 178.60.
3.3 Cylinder processing. After shaping, deburring, assembly, and welding, and before
placement of the porous filler into the cylinder, the internal surfaces shall be free of residual
hydrocarbons. Drawn shells shall be protected against deterioration and corrosion but internal
rust bloom is acceptable. The filler shall be poured into the cylinder and shall be thoroughly
cured prior to infiltration with acetone.
3.4 Flanges, valves, and caps. The cylinder shall be fitted with a steel flange conforming
to MIL-C-17376/2 as specified in table I. When specified (see 6.2), 10 and 40 cubic foot
cylinders shall be supplied with a drilled and threaded boss welded to the cylinder. Each
acetylene cylinder shall be fitted with a valve in accordance with A-A-59860 as specified in
table I. Each cylinder with a flange shall be supplied with a valve protection cap conforming to
MIL-C-17376/1.
3.5 Tare weight. The tare weight of the cylinder shall be the weight of the cylinder,
flange, and valve, including the porous filler, saturation gas, and acetone, but excluding the valve
protection cap. The tare weight for 10-cubic-foot cylinders shall be stamped in 1-ounce
increments. Tare weights of larger acetylene cylinders shall be measured in pounds and quarter-
pounds, expressed in 4-ounce increments to the nearest quarter-pound. The figures expressing
pounds shall be separated from the figures expressing ounces by a dash ().
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