ASME A13.1:2007 pdf free download

ASME A13.1:2007 pdf free download Scheme for the Identification of Piping Systems
1OBJECT AND sCOPE
This Standard is intended to establish a common sys-tem to assist in identification of hazardous materialsconveyed in piping systems and their hazards when
released in the environment.
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 norto electrical conduits.
Existing schemes for identification shall be consideredas 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
2DEFINITIONS AND REFERENCES2.1 Piping Systems
For the purpose of this Standard, piping systems shallinclude piping of any kind including fittings, valves,and pipe coverings. Supports,brackets, or other accesso-ries are specifically excluded from applications of thisStandard. Piping is defined as conduits used to convey,distribute, mix, separate, discharge, meter, control, orsnub 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 andcontinue to burn in air. The term thus may apply,depending on service conditions, to fluids defined forother purposes asflamnable or combustible.
2.2.2 Combustible. This classification includes flu-ids that can burn, but are not flammable.
2.2.3 Toxic and Corrosive.This classificationincludes fluids that are corrosive or toxic, or will produce
corrosive or toxic substances when released.
2.2.4 Fire Quenching.This classification includeswater, foam, and CO.used in sprinkler systems and firefighting piping systems.
2.3 References
The latcst edition of the following standard shall, to
the extent specified herein, form a part of this Standard.
3 METHOD OF IDENTIFICATION 3.1 Legend This Standard considers a legend to be primary and explicit for identification of contents. Positive identifica- tion of the contents of a piping system shall be by lettered legend, giving the name of the contents in full or abbrevi- ated form (see Table 1). Arrows shall be used to indicate direction of flow. Where flow can be in both directions, arrows in both directions shall be displayed. Contents shall be identified by a legend with sufficient additional details 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 applied close to valves or flanges and adjacent to changes in direction, branches, and where pipes pass through walls or floors; and at intervals on straight pipe runs sufficient for identification. Identification may be accomplished by stenciling, the use of tape, or markers.
In any situa- tion, the number and location of identification markers shall be based on the particular piping system.
3.2 Color Color should be used to identify the characteristic hazards of the contents. Color should be displayed on, or contiguous to, the piping by any physical means, but its use shall be in combination with legend. Color may be used in continuous, total length coverage or in inter- mittent displays. Colors preceded by the word “Safety” shall meet the requirements of ANSI Z535.1. See Table 2.