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It is recognised that not all the elements above lend themselves to a standard
Annex C (informative) Background to the BS 7121 series
commissioning and final safety validation of the E/E/PE safety-related systems
1) format and protocols for implementing the mechanisms in the ITU‑T X
Gas cylinders. Cylinder valve outlets for gases and gas mixtures. Selection and dimensioning Ingestion-build-177197 It is recognised that not1 Scope This document establishes practical criteria for determining valve outlet connections for gas cylinders. It applies to the selection of gas cylinder valve outlet connections and specifies the dimensions for a number of them. This document is not applicable to connections used for cryogenic gas withdrawal or gases for breathing equipment, which are the subjects of other International Standards. NOTE Other safeguard provisions like labelling or
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