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Increase safety with reliable,
ANSI/ASME 13.1-compliant pipe markers

Clearly identify pipes for more safety

Get the pipe marking guidebook Shop for ANSI/ASME 13.1 pipe markers

ANSI/ASME 13.1-compliant pipe markers

Clearly highlight hidden pipe contents with ANSI/ASME 13.1-compliant pipe markers, printed on reliable pipe marker materials that stay attached and remain legible in tough conditions.


Colour scheme


Pipe content Colour
Fire quenching fluids Safety Red
Toxic and corrosive fluids Safety Orange
Flammable and oxydising fluids Safety Yellow
Combustible fluids Safety Brown
Potable, cooling, boiler feed and other water Safety Green
Compressed air Safety Blue
Defined by user Safety Purple
Safety White
Safety Grey
Safety Black

Warning Symbols

The European Union requires dangerous substances to carry relevant GHS/CLP symbols to identify hazardous substances and inform users on these hazards.

Find all CLP/GHS symbols >>


Type Pipe Diameter (mm) Length of Colourfield (mm) Size letters (mm)
From To
Size 1 18 33 200 13
Size 2 34 61 200 19
Size 3 62 170 300 32
Size 4 171 254 600 64
Size 5 (HPHV optimized) 254 >254 800 89

Size letters (mm)

Length of colour field (mm)

Perforated arrow heads

    ANSI/ASME 13.1-compliant pipe markers are supplied with a perforated arrow head on both ends: simply remove the one not required.



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