Pipe marking can stop injuries. Labels on pipes give visual safety cues to workers on the job. Color codes from ANSI will help employees know what is inside a pipe, and if it is dangerous. / / The color of the background and text of the pipe making label will quickly identify pipe contents, from potable water to toxic sludge. The facility should have a common color key posted so all workers are familiar it. / / The larger the pipe, the larger the pipe marking needed. ANSI's best practices recommendations on size are an excellent guide so employees can see the hazards even from a distance. / / Pipe marking should be used at many locations, such as when a pipe turns a corner, goes through a wall, or at valve points. / / These labels instantly communicate needed information for workers visually, eliminating the need for them to ask questions and increase industrial hygiene.