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  2. Utility location - Wikipedia

    en.wikipedia.org/wiki/Utility_location

    Yellow spray paint indicating below-street gas utility line (New York City, 2007) Telecommunication cable location marking Colored flags for utility locating Permanent water pipeline markers in Switzerland. Utility color codes are used to identify existing underground utilities in construction areas, to protect them from damage during ...

  3. Detectable tape - Wikipedia

    en.wikipedia.org/wiki/Detectable_tape

    Detectable tape or Underground warning tape is a conductive tape typically applied over buried utilities made of non-conductive materials such as plastic, fiberglass, or cement. It is used because most utility location methods work best on conductive objects, and hence may easily miss structures made of non-conductive materials.

  4. Color code - Wikipedia

    en.wikipedia.org/wiki/Color_code

    Pipe marking; Queen bee birth year code; Underground utility location; Hospital emergency codes often incorporate colors (such as the widely used "Code Blue" indicating a cardiac arrest), In military use: Homeland Security Advisory System; Artillery shells and other munitions, which are color-coded according to their pyrotechnic contents; List ...

  5. Flagging (tape) - Wikipedia

    en.wikipedia.org/wiki/Flagging_(tape)

    Tree marking in the natural monument Černý orel, Mladá Boleslav District, Czech Republic. Flagging is a coloured non-adhesive tape used in marking objects. It is commonly made of PVC or vinyl , though wood fibre cellulose-based biodegradable flagging also exists.

  6. Pipe marking - Wikipedia

    en.wikipedia.org/wiki/Pipe_marking

    Example of pipe marking through colors and symbols (arrows) to indicated pipe contents (colors) and flow direction (arrows). Pipe marking on a natural gas pipe In the process industry , chemical industry , manufacturing industry , and other commercial and industrial contexts, pipe marking is used to identify the contents, properties and flow ...

  7. If You See Paint on Trees, This Is What It Means - AOL

    www.aol.com/lifestyle/see-paint-trees-means...

    There, they switch up marking colors every year. “There’s only really like half a dozen colors that stand out on the tree—bright colors like blue, red, yellow, and orange,” says Fisher ...

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