Division 9.5.1.2 Concentration and expiration date
United Kingdom
The concentration of any calibration gas standard and its expiration date specified by the gas supplier shall be recorded.
- (a)
No calibration gas standard may be used after its expiration date, except as allowed by paragraph (b) of this point.
- (b)
F1Calibration gases may be relabelled and used after their expiration date if it is approved in advance by approval authority.