MIL-PRF-27407B, PERFORMANCE SPECIFICATION: PROPELLANT PRESSURIZING AGENT, HELIUM (25 AUG 1997) [SUPERSEDING MIL-P-27407A]

MIL-PRF-27407B, PERFORMANCE SPECIFICATION: PROPELLANT PRESSURIZING AGENT, HELIUM (25 AUG 1997) [SUPERSEDING MIL-P-27407A]., This specification covers the requirements for two grades and two types of helium.