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In order to promote greater safety, lessen the chances of error, confusion, or inaction, especially in times of emergency, a uniform system for the identification of piping contents has been established to warn personnel when the piping contents are inherently hazardous. Therefore, while this standard has been prepared to specify the the identification of the contents of piping systems on the basis of legends, it also suggests the use of color as a supplementary means of identifying the type of hazard of the material contained in the system.
Stranco, in conjunction with ANSI A13.1 manufactures a complete line of pipe markers capable of functioning in any industrial environment including the following specialized markets: brewery and distillery, hydroelectric power plants, pulp, paper and paperboard mills, petrochemical plants, waste water treatment plants and semiconductor and chemical. |
| ANSI COLOR RECOMMENDATIONS |
ANSI SIZE RECOMMENDATIONS |
| Materials Inherently Hazardous |
Flammable or Explosive
Chemically Active or Toxic
Extreme temperature/pressure
Radioactive
|
Black Letters on Yellow Background |
| Materials of Inherently Low Hazardous |
Liquid or liquid admixture |
White letters on Green background |
| Gas or gaseous admixture |
White Letters on Blue Background |
| Fire Quenching Materials |
Water, foam, CO2, Halon, etc. |
White Letters on Red Background |
|
Outside Diameter
of Pipe
or Covering |
Length
of Color
Field
|
Size of
Letter |
| 3/4" to 1 1/4" |
8" |
1/2" |
| 1-1/2" to 2" |
8" |
3/4" |
| 2-1/2" to 6" |
12" |
1-1/4" |
| 8" to 10" |
24" |
2-21/2" |
| over 10" |
32" |
3-1/2" |
| NOTE:For pipes less than 3/4" in diameter, a valve tag is recommended.
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| HOW & WHERE PIPE MARKERS SHOULD BE APPLIED |
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QUANTITY OF MARKERS
The best method for determining the quantity of markers needed is to walk down the lines and count the marking locations. However, many situations do not allow for a complete walk down. As an alternative, determine the lineal feet pf piping for each diameter of pipe service. Divide the lineal feet of each service by 20 to estimate the number of markers needed.
For Example: You have 800 feet of 4 inch "CONDENSATE" piping; 800 ft. divided by 20ft. = 40 markers
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