The Proper Marking of Contents and Flow Direction in Pipes and Piping Systems is a Vital Component of a Thorough Safety and Identification Program.
A13.1 – 2007 Scheme for the Identification of Piping Systems...a uniform system for the identification of piping contents has been established to warn personnel when the piping contents are inherently hazardous ...this standard has been prepared to specify 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.
Pipe markers are designed to meet or exceed ASME (ANSI) A13.1-2007 recommendations
for size, color and visibility.
29 CFR 1910.253 Oxygen-fuel gas welding and cutting (d)(4)(ii)
Aboveground piping systems shall be marked in accordance with the American National Standard Scheme for the Identification of Piping Systems, ANSI A13.1
§ 1910.261 Pulp, paper, and paperboard mills (a)(3) General incorporation of standards. Establishments subject to this section shall comply with the following standards:
1910.261(a)(3)(ii) Scheme for the Identification of Piping Systems, A13.1
§ 1910.262 Textiles
1910.262(c)(7) Identification of piping systems. Identification of piping systems shall conform to American National Standard A13.1
Color - Colors identify the characteristic hazards of the contents of the piping system.
Pipe markers are quick visual cues, providing immediate identification information of pipe contents for emergency responders and workers to safely carry out their responsibilities when working in and around piping systems.
Pipe Markers provide visible information to communicate the start, run, and end of contents in piping systems. A comprehensive and standardized labeling program – when installed properly provides an awareness of hazards in piping systems, thus, promoting a safe working environment. Minimizing the potential for downtime due to unknown pipe contents that may lead to an error or accident.
Letter Height & Pipe Marker Size - The outside diameter of the pipe determines the letter height and background field length of the marker. For pipes smaller than 3/4" in diameter, and for valve and fitting identification, a permanently legible tag is recommended.
The legend or wording on the pipe marker is to be the primary means of naming the contents of the pipe. The name is to be brief, yet complete or in understood abbreviated format. Arrows are to accompany the legend to indicate the directional flow of the contents. Additional information may be necessary to identify the content details such as pressure and temperature.
• Above or below center visual line of pipe
• Frequent intervals on straight pipe runs (visible from any point along the length)
• Close to valves
• Near branches and T’s in piping
• Any change in direction of piping
• Near points before and after pipe going through walls, ceilings, and floors
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