This Standard is intended to establish a common system to assist
in identification of hazardous materials conveyed in piping systems
and their hazards when released in the environment.
This scheme concerns identification of contents of piping
systems. It is recommended for the identification of piping systems
used in industrial, commercial, and institutional installations,
and in buildings used for public assembly. It does not apply to
buried pipelines nor to electrical conduits.
Existing schemes for identification shall be considered as
meeting the requirements of this Standard if
(a) such schemes are described in writing
(b) employees are trained as to the operation and
hazards of the piping systems
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