This infographic, titled “Pipe Marking 101” is a brief primer on the required markings that pipes at industrial facilities must have. Typically these are labels, but pipes and valves are sometimes marked with tags. This infographic focuses on the labels. The infographic uses a pleasing combination of clear illustrations and easily read text to display the information.

ASME (The American Society of Mechanical Engineers) developed the standard. ANSI (The American National Standards Institute) administers and publishes the standard (along with over 10,000 other national standards).

The aspects of pipe marking that this infographic focuses on are A) required colors; pipes should be marked with specific colors and combinations of colors per the standard, that indicated the class or type of liquid or gas transported by the pipe. B) required size; the size of the label should be large enough to be easily seen and read. A pipe with an oversize label may be harder to read than an undersize label. The standard uses the diameter of the pipe to set the height of the label. And lastly, C) location of the labels; The frequency of labels along a pipe run, where labels should occur near valves, elbows T’s and other fittings, as well as where pipes pass through walls or other barriers.


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