ASME A13.1:2007 pdf download Scheme for the Identification of Piping Systems
OBJECT AND SCOPE
This Standard is intended to establish a common system to assist in identification of hazardous materialsconveyed in piping systems and their hazards when
released in the enyironment
This scheme concerns identification of contents of pip
ing systems. It is recommended for the identification
of piping systems used in industrial. commercial andinstitutional installations. and in buildings used for pub
lic 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 haz-ards of the piping systems
2 DEFINITIONS AND REFERENCES
2.1 Piping Systems
For the purpose of this Standard. piping systems shall
include piping of any kind including fittings, valves,
and pipe coverings,Supports,brackets,or other accessories are specifically excluded from applications of thisStandard. Piping is defined as conduits used to conveydistribute,mix,separate,discharge,meter,control, or
snub fluid flows.
2.2 Materials
2.2.1 Flammable. This classification includes fluids
which under ambient or expected operating conditions,
are a vapor or produce vapors that can be ignited and
continue to burn in airThe term thus may apply,depending on service conditions, to fluids defined for
other purposes asfammable or combustible
2.22 Combustible.This classification includes fluids that can burn, but are not flammable.
223 Toxic and Corrosive.This classificationincludes fluids that are corrosive or toxic, or will producecorrosive or toxic substances when released.
22.4 Fire Quenching.This classification includeswater, foam, and COused in sprinkler systems and firefighting piping systems.
2.3 References
The latest edition of the following standard shall, tothe extent specified herein, form a part of this Standard.
ANSI Z535.1, Safety Color Code
Publisher: American National Standards Institute(ANSD,25 West 43rd Street, New York,NY 10036
METHOD OF IDENTIFICATION
3.1 Legend
This Standard considers a legend to be primary andexplicit for identification of contents. Positive identifica-tion of the contents of a piping system shall be by letteredlegend, giving the name of the contents in full or abbrevi-ated form (see Table 1). Arrows shall be used to indicatedirection of flow. Where flow can be in both directions,arrows in both directions shall be displayed. Contentsshall be identified by a legend with sufficient additionaldetails such as temperature, pressure, etc, as are neces-sary to identify the hazard.
Legends shall be brief, informative, pointed, and sim-ple for greatest effectiveness. Legends shall be appliedclose to valves or flanges and adjacent to changes indirection, branches, and where pipes pass through wallsor floors; and at intervals on straight pipe runs sufficientfor identification. Identification may be accomplishedby stenciling, the use of tape, or markers. In any situa-tion, the number and location of identification markersshall be based on the particular piping system.
3.2 Color
Color should be used to identify the characteristichazards of the contents. Color should be displayed on,or contiguous to, the piping by any physical means, butits use shall be in combination with legend. Color maybe used in continuous, total length coverage or in inter-mittent displays. Colors preceded by the word “Safetyshall meet the requirements of ANSI Z535.1. See Table 2.