NPFC - BB-H-1168
HELIUM, TECHNICAL
inactive
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| Organization: | NPFC |
| Publication Date: | 31 May 1968 |
| Status: | inactive |
| Page Count: | 7 |
Document History
November 15, 2010
HELIUM, TECHNICAL
Grade A helium is intended for use as a shielding gas in arc welding. Grade B helium is intended for use as a buoyant in lighter-than-air craft such as weather balloons.
August 3, 2000
HELIUM, TECHNICAL
Grade A helium is intended for use as a shielding gas in arc welding. Grade B helium is intended for use as a buoyant in lighter-than-air craft such as weather balloons.
May 9, 1977
HELIUM, TECHNICAL
This specification covers two technical grades of gaseous helium (see 6.1).
Helium shall be of the following grades as specified (see 6.2):
Grade A - 99.995 percent helium
Grade B - 97.5 percent...
BB-H-1168
May 31, 1968
HELIUM, TECHNICAL
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