DOT-CFFC BASIC REQUIREMENTS (FIFTH REVISION)

CFFC-3 SERVICE LIFE: Cylinder service life is 15 years from
the date of manufacture. The Associate Administrator
for Hazardous Materials Safety (AAHMS) may approve an
extension of cylinder service life up to a total
service life of 30 years. A service life extension
approval is made by modification to the exemption
authorizing