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ASTM
F14-80(2019)
Standard Practice for Making and Testing Reference Glass-Metal Bead-Seal
2019
4
ASTM Vol.15.02 (2022)
The term reference as employed in this practice implies that both the glass and the metal of the reference glass-metal seal will be a standard reference material such as those supplied for other physical tests by the National Institute of Standards and Technology, or a secondary reference material whose sealing characteristics have been determined by seals to a standard reference material (see NIST Special Publication 260).4 Until standard reference materials for seals are established by the NIST, secondary reference materials may be agreed upon between producer and user.5