Hazardous Material Pipe Markers
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| Outside Diameter of Pipe |
Size of Letters |
| 3/4" to 1-1/4" | 1/2" |
| 1-1/2" to 2" | 3/4" |
| 2-1/2" to 6" | 1-1/4" |
| 8" to 10" | 2-1/2" |
| Over 10" | 3-1/2" |
| NOTE: For pipes less than 3/4" in diameter, a permanently legible tag is recommended. | |
Products that require a hazardous pipe marker:
- Flammable or explosive
- Chemically active or toxic
- Extreme temperature/pressure
- Radioactive
All pipe markers of this classification are printed as black on yellow.
Navigate our wide selection of hazardous material pipe markers by choosing a tab below.












































































































































