BB-A-106D
TABLE I. Properties of acetylene.
Limiting characteristics 1
Grade A
Grade B
(Percent by volume) 2
(Percent by volume) 2
CGA G-1.1 Quality Verification Level
QVL H
QVL C
Acetylene (C2 H2)
99.6 minimum
98.0 minimum
Phosphine (PH3) and arsine (AsH3) 3
0.0025 maximum
0.05 maximum
Hydrogen sulfide (H2S) 3
0.0025 maximum
0.05 maximum
1
Additional information on the properties and handling of acetylene may be found in CGA G-1.
2
Acetone-free basis.
3
Carbide process acetylene only (see 6.3).
3.2 Cylinders and valves. The acetylene shall be contained in government-owned and furnished
cylinders conforming to MIL-DTL-3701 equipped with valves meeting all requirements of
A-A-59860. When specified (see 6.2), new cylinders meeting the same requirements shall be
purchased and furnished with the gas product. When specified (see 6.2), the acetylene shall be
contained in supplier-owned DOT-approved cylinders meeting the requirements of
49 CFR 171-185 equipped with valves qualified to either CGA V-9 or A-A-59860.
3.3 Cylinder maintenance. Government-owned and furnished cylinders shall be inspected,
maintained, and when necessary, reconditioned in accordance with MIL-STD-1411 to meet all
serviceability requirements of 49 CFR 171-185. Supplier-owned cylinders shall be processed
using CGA C-13, CGA G-1.9, and the supplier's own approved procedures to meet all
serviceability requirements of 49 CFR 171-185.
3.3.1 Painting. Government-owned and furnished cylinders requiring repainting shall be
color-coded and stenciled in accordance with MIL-STD-101. The paint and the painting process
shall be by any method or system that will provide a finish that meets the requirements of
CGA TB-17.
3.3.2 Valves. Unless otherwise specified (see 6.2), replacement valves for any defective valves
found in the government-owned and furnished cylinders shall be furnished by the supplier and
shall be qualified to meet all requirements of A-A-59860. Valves in supplier-owned cylinders
shall be qualified to meet all requirements of either A-A-59860 or CGA V-9.
3.3.3 Acetone. Acetone for the replenishment of government-owned and furnished cylinders
shall conform to ASTM D329.
3.4 Capacity. Cylinders shall be filled to volume capacity on the basis of weight (see 6.6).
Cylinders shall be filled in compliance with 49 CFR 173.303; the pressure in the filled cylinder
shall not exceed 1723 kPa (gauge) at 21.1 °C (250 pounds per square inch gauge (psig) at 70 F).
3.5 Leakage. Cylinders and valves shall not leak after being filled.
4
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business