Abstract： ASME A13.1:2020 pdf download.Scheme for the ldentification of Piping Systems. Legends shall be applied dose to valves or flanges; adjacent to changes In direction, branches, and where pipes pass through walls or floors; and at intervals on...

ASME A13.1:2020 pdf download.Scheme for the ldentification of Piping Systems.

Legends shall be applied dose to valves or flanges; adjacent to changes In direction, branches, and where pipes pass through walls or floors; and at intervals on straight pipe runs sufficient for identification, For piping layouts where applying legends in this way is impractical, substitute techniques to achieve positive identification are acceptable. One such technique Is placing the

legends on plates that are attached to the piping.

4.4 Type and Size of Letters

Contrast shall he provided between the color field and legend for readability. Use of letters of standard style.2 in sizes 0.5 in. (13 mm) and larger. is recommended. See Table 4.4-1 for specific size recommendations. For identitication of materials in piping

with an outside cover diameter less than Q.7S in. (19 mm). and for valve and fitting identifIcation, the use of a permanently

legible tag is recommended.

4.5 Abandoned Piping

Piping that has been abandoned in place should be identilled. The recommended color scheme Is safety white background with black

letters. A black border should be added to the identification. When the abandoned piping is protected from corrosion by the

addition of a pressurized fluid or contains residual hazardous material. the legend should indicate that.

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