The American National Standards Institute (ANSI/ASME) has put regulations in place that require proper marking of hazardous materials in piping systems.
The requirements, though not enforced by OSHA, apply to three elements of pipe marking:
- Where the markers are placed on the piping system
- What color the markers are depending on the pipes’ contents
- What size pipe marker you should use and the required letter height depending on the size of the pipe
I have included details on all of ANSI’s regulations below.
Pipe Marker Placement Diagram
Pipe Marker Color Recommendations
Pipe Marking Size Chart
