 |
|||
|
|
|||
|
Page Title:
Preventing Wrong-Unit, Wrong-System, or Wrong-Train Errors |
|
||
| ||||||||||
|
|  DOE-STD-1044-93
choosing to use color coding may benefit from testing on a full-scale mockup before applying the
coding system to control panels and components.
Preventing Wrong-Unit, Wrong-System, or Wrong-Train Errors
Wrong-unit errors can occur in the performance of operations or maintenance when identical
components are used in parallel units. To reduce the errors, a unit color code can be applied to
the following:
C
C
Labels
Floors
C
C
Walls
Doors
C
C
Equipment bases, pedestals, and curbing
Stencil marking backgrounds
C
C
Valve handwheels
Paper used for procedures or other
unit-specific documents
Errors in identification also occur when similar or identical components are used in more than one
system (e.g., portions of compressed air, fuel oil, lube oil, and cooling water systems may have
similar piping and components), or when redundant equipment trains are installed (e.g., identical
equipment may be installed in safety monitoring trains A and B). Color-coded labels and other
color-coding methods listed above may be applicable to systems and equipment trains. In
addition, some facilities have applied color-coded paint to all painted components of designated
systems; for example, all piping and components of the compressed air system are painted blue,
the lube oil system is painted orange, the steam system is painted tan, etc.
Identifying Hazards in Piping Contents
A standard published by the American National Standards Institute, Scheme for the Identification
of Piping Systems, ANSI A 13.1-1996, specifies a method for identifying the contents and hazards
in piping systems. A standard method of identification is particularly important when components
in piping systems may be operated or manipulated by personnel from outside the facility, such as
firefighters or outside maintenance personnel. The standard identifies the following practices for
labeling piping systems:
C
The legend (text) of the label must identify the contents of the piping and the hazard (e.g.,
"hot water," "air - 100 psig," "sulfuric acid," etc.)
B-4
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals