Label Placement - s1044cn10017

DOE-STD-1044-93

combination of colors. Appendix B describes several applications of color coding for

labels, control panels, and components.

In some facilities, bar coding is added to equipment labels to facilitate automated data

taking or maintenance tracking. Facilities involved in extensive relabeling of existing

equipment or installation of new equipment systems may find it worthwhile and cost

effective to add bar coding.

4.3

Label Placement

Labels should be placed on or near the components being identified in a manner that

clearly associates the label with its respective component. Appendix C shows how the

method used when applying labels can affect the operator's ease of use and the

accuracy of identification.

Labels for components should be permanently attached to the components (e.g.,

attached to the valve yoke, not to a removable part such as the handwheel) in a way

that will not interfere with the normal operational use or testing of the component.

Valves operated by reach rods or chains, or other remotely operated components,

should have an additional label installed at the operating device. Labels for chain

operators should be attached to a small piece of tubing through which the chain

passes, so the label always remains at the bottom of the chain loop. If the valve is

difficult to be seen from the operating location, the label should indicate the open and

close direction for the chain or other operator.

Label materials (including adhesives and other means of attachment) should be

compatible with the components and environment where they are used. Labels made

with embossed plastic tape frequently curl and fall off the panels to which they have

been attached. Metal labels or wire attachments made of dissimilar metals can cause

galvanic corrosion of the component, label, or attachment device. Use of adhesives

containing chlorides can cause corrosion of stainless steel components.

High-temperature, humidity, chemical, or radiation environments may preclude the use

of certain label materials.

Labels should normally be constructed of non-reflective materials. This helps ensure

readability of the label under a variety of lighting conditions. Labels that must be read

in dim light or during blackout conditions may require the use of reflective or

phosphorescent materials.