ASME A13.1:2015 pdf free download – Scheme for the Identification of Piping Systems
This Standard is intended to establish a common sys- tem to assist in identification of hazardous materials conveyed in piping systems and their hazards when released in the environment. This scheme concerns identification ofcontents ofpip- ing systems. It is recommended for the identification of piping systems used in industrial, commercial, and institutional installations, and inbuildings 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
2.1 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 accesso- ries are specifically excluded from applications of this Standard. Piping is defined as conduits used to convey, distribute, mix, separate, discharge, meter, control, or snub fluid flows.
3.1 Legend
This Standard considers a legend to be primary and explicit for identification of contents. Positive identifica- tionofthe contents ofa pipingsystemshall be bylettered legend, givingthe nameofthe contents infull orabbrevi- 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.
The applicable GHS 1 pictogram as illustrated in Fig. 1 may be included as part of the legend. Where piping is connected to containers that are labeled in accordance with GHS requirements, a corres- ponding label on the piping may be provided. The cor- responding label should contain at least the product name or identifier, the pictogram, the signal word, and the physical, health, and environmental hazard statement(s).
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 ofANSI Z535.1 (see Table 2).
3.5 Unusual or Extreme Situations
Piping layouts that are in a limited area ofinaccessibil- ity or ofextreme complexity may require substitute tech- niques to achieve positive identification. Use of substitute techniques shall be limited to such segments and shall not deviate from the concept of identification described in paras. 3.1, 3.2, and 3.3.