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[Products] How is the expiration date determined? Can it be extended?

2017-12-05 09:57
Before we determine an expiration date, we carry out short- and long-term stability assessments based on gas composition, concentration, and cylinder type. In addition, the expiration date is determined based on the period in which stability is assured. Expiration dates may vary depending on gas components, concentrations, cylinder materials, valve types, etc.
If you want to extend the basic expiration date that is determined based on the product specifications, we may conduct a technical review to determine if the expiration date can be extended. At this time, chances are high that the uncertainty in measurement may be adjusted partially. For another method for extending a product expiration date, you may request us to conduct a reanalysis and renew the expiration date starting from the reanalysis date.