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Self-Adhesive Pipe Markers & Labels

Effective indoor and outdoor pipe marking with self-adhesive labels

Mark pipes with easy-to-peel, self-adhesive pipe markers that press into place. This type of label is ideal for clean, dry surfaces found inside commercial facilities but can be used for outdoor applications as well. Seton’s self-adhesive pipe marker labels stick easily to any size pipe - including small, narrow, and curvy pipes.


Seton’s industry-leading Opti-Code® Pipe Markers are a top seller used across the US. Choose from an array of stock self-adhesive markers or customize your own!

Looking for assistance in choosing the right style pipe markers? Explore our comprehensive Pipe Marker Buyer's Guide to see if self-adhesive pipe markers are right for you! Additionally, discover valuable resources such as Take-Off Services, submittal packages, adhering to the current pipe marking standards, How-To videos, and more on our Pipe Marking Resource Center.

For further assistance or to inquire about project pricing, contact our team of pipe and valve experts at 877-367-7732. We're here to support your needs.

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Benefits of Self-Adhesive Pipe Markers


  • Designed to be a long-lasting pipe marker, ensuring you’re always in compliance with ANSI/ASME requirements

  • Pressure-sensitive adhesive forms a strong bond without the use of solvent, water, or heat. The more pressure applied, the stronger the hold

  • Vinyl material is tear, scratch, UV, and fade-resistant, providing more overall durability

  • Best option for indoor commercial facilities that offer clean and dry surfaces

  • Available in multiple sizes to adhere to any and all piping


Looking for pipe markers to be used in applications that may not be clean and dry? Check out Seton’s Snap-Around Pipe Markers.

How to Install Self-Adhesive Pipe Markers

Step 1: Identify where on the pipe the marker is to be placed
Step 2: Clean the surface of the pipe thoroughly
Step 3: Place the marker onto the pipe and apply pressure for proper adhesion

Check out our article on the pipe marker installation process for detailed instructions on how to properly install pipe markers.

In order to be ASME compliant, pipe arrow markers shall be used to indicate direction of flow. Where flow can be in both directions, arrows in both directions shall be displayed. For additional information about pipe markers, visit our Pipe Marker Guidelines.

ANSI Pipe Labeling: Must-Do’s for Pipe Labeling Standards

Color code for quick recognition

Assign specific colors to different pipe contents, such as hazardous materials, fire protection systems or potable water. Consistent color coding simplifies identification and reduces the risk of accidents. Here’s the color-coding system recommended under ASME/ANSI A13.1


Fluid Service Color Scheme
Fire Quenching Fluids White on Red
Toxic & Corrosive Fluids Black on Orange
Flammable & Oxidizing Fluids Black on Yellow
Combustible Fluids White on Brown
Potable, Colling, Boiler Feed, & Other Water White on Green
Compressed Air White on Blue
Defined by User White on Purple
Defined by User Black on White
Defined by User White on Grey
Defined by User White on Black

Match length and letter height to pipe diameter

Ensure that your pipe markers are appropriately sized for optimal visibility. Follow these guidelines by pipe size.


Fits Pipe Outer Diameter 0.7" - 1.3" (18 - 33 mm) 1.4" - 2.4" (34 - 61 mm) 2.5" - 6.7" (62 - 170 mm) 6.8" - 10" (171 - 254mm) Over 10" (Over 254 mm)
Length of Color Field 8 in (203 mm) 8" (203 mm) 12" (305 mm) 24" (610 mm) 32" (813 mm)
Letter Height 0.5" (13 mm) 0.7" (19 mm) 1.3" (32 mm) 2.5" (64 mm) 3.5" (89 mm)

Note: For pipes less than 0.7" diameter, a permanently legible tag is recommended


Place markers in key, high-visibility areas

Position pipe labels on pipes to achieve the best visibility. Install pipe labels below or above the horizontal centerline of the pipe when pipes are located above or below the normal line of vision, respectively. Consider placing pipe markers both near the ceiling and near the floor of your facility. In addition, mark pipes:


  • Adjacent to all valves and flanges
  • At both sides of floor or wall penetrations
  • Adjacent to changes in directions
  • At least every 50 feet on straight runs

Proper placement of marker on pipes
Mark pipes adjacent to all
valves and flanges.
Proper placement of markers on pipes separated by a wall
Mark pipes at both
sides of floor.
Proper placement of markers on pipes with horizontal and vertical orientation
Mark pipes adjacent to
change in direction.
Proper distance of markers on the same pipe
Mark pipes every 25 to 50 foot
intervals on straight runs
For additional guidance, check out our Pipe Marker Standards Walk-Through.

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Text legend
  1. ACID (4)
  2. ACID WASTE (2)
  3. AIR (5)
  4. AMMONIA (4)
  5. ARGON (5)
  6. ASBESTOS FREE INSUL. (2)
  7. ASBESTOS FREE INSULATION (2)
  8. BLOW-OFF WATER (2)
  9. BOILER BLOW DOWN (4)
  10. BOILER FEED WATER (4)
  11. BRINE (2)
  12. CARBON DIOXIDE (5)
  13. CAUSTIC (3)
  14. CHILLED WATER (5)
  15. CHILLED WATER RETURN (6)
  16. CHILLED WATER SUPPLY (6)
  17. CHLORINE (4)
  18. CIRCULATING WATER (2)
  19. CITY WATER (5)
  20. COLD WATER (5)
  21. COLD WATER RETURN (4)
  22. COLD WATER SUPPLY (4)
  23. COMPRESSED AIR (7)
  24. CONDENSATE (6)
  25. CONDENSATE RETURN (5)
  26. CONDENSATE SUPPLY (2)
  27. CONDENSER DRAIN (2)
  28. CONDENSER WATER (2)
  29. CONDENSER WATER RETURN (6)
  30. CONDENSER WATER SUPPLY (6)
  31. COOLING WATER (6)
  32. DANGER ASBESTOS INSULATION (3)
  33. DEIONIZED WATER (4)
  34. DIRECTIONAL ARROW (6)
  35. DISTILLED WATER (2)
  36. DOMESTIC COLD WATER (6)
  37. DOMESTIC HOT WATER (6)
  38. DOMESTIC HOT WATER RETURN (4)
  39. DOMESTIC HOT WATER SUPPLY (3)
  40. DRAIN (6)
  41. DRAIN WATER (3)
  42. DUAL TEMP RETURN (3)
  43. DUAL TEMP SUPPLY (3)
  44. EQUALIZER (2)
  45. EXHAUST (5)
  46. EXHAUST AIR (3)
  47. FILTERED WATER (3)
  48. FIRE AUTO SPRINKLERS (2)
  49. FIRE PROTECTION WATER (7)
  50. FIRE SPRINKLER WATER (3)
  51. FUEL GAS (6)
  52. FUEL OIL (7)
  53. FUEL OIL RETURN (2)
  54. FUEL OIL SUPPLY (2)
  55. GAS (8)
  56. GLYCOL (8)
  57. GLYCOL RETURN (2)
  58. GLYCOL SUPPLY (3)
  59. HEATING RETURN (7)
  60. HEATING SUPPLY (7)
  61. HEATING WATER (2)
  62. HEATING WATER RETURN (4)
  63. HEATING WATER SUPPLY (4)
  64. HIGH STAGE DISCHARGE (2)
  65. HIGH STAGE SUCTION (2)
  66. HI-PRESSURE AIR (3)
  67. HI-PRESSURE CONDENSATE (3)
  68. HI-PRESSURE GAS (6)
  69. HI-PRESSURE STEAM (5)
  70. HI-PRESSURE WATER (3)
  71. HOT GAS (2)
  72. HOT GAS DEFROST (2)
  73. HOT WATER (7)
  74. HOT WATER RECIRCULATION (2)
  75. HOT WATER RETURN (7)
  76. HOT WATER SUPPLY (7)
  77. HYDROCHLORIC ACID (2)
  78. HYDROGEN (5)
  79. INDUSTRIAL WATER (3)
  80. INSTRUMENT AIR (6)
  81. LO-PRESSURE AIR (4)
  82. LO-PRESSURE CONDENSATE (4)
  83. LO-PRESSURE GAS (3)
  84. LO-PRESSURE NATURAL GAS (2)
  85. LO-PRESSURE STEAM (6)
  86. LOW STAGE SUCTION (2)
  87. MAKE-UP WATER (3)
  88. MEDICAL AIR (3)
  89. MEDIUM PRESSURE NATURAL GAS (3)
  90. MEDIUM PRESSURE STEAM (3)
  91. NATURAL GAS (9)
  92. NITROGEN (9)
  93. NITROUS OXIDE (4)
  94. NON-POTABLE WATER (7)
  95. OIL (4)
  96. OVERFLOW (2)
  97. OXYGEN (7)
  98. PLANT AIR (3)
  99. PLANT WATER (2)
  100. PLUMBING VENT (4)
  101. POTABLE WATER (7)
  102. PROCESS WATER (5)
  103. PROPANE GAS (7)
  104. PUMPED CONDENSATE (2)
  105. PUMP OUT (2)
  106. PURGE (2)
  107. RAIN WATER (5)
  108. Refrigerant (4)
  109. Refrigerant Liquid (5)
  110. Refrigerant Suction (5)
  111. REFRIGERATED LIQUID (4)
  112. REFRIGERATED SUCTION (4)
  113. REFRIGERATION (4)
  114. RELIEF VENT (2)
  115. RETURN (3)
  116. ROOF DRAIN (5)
  117. SANITARY DRAIN (4)
  118. SANITARY SEWER (6)
  119. SANITARY VENT (2)
  120. SANITARY WASTE (2)
  121. SOFT WATER (2)
  122. SPRINKLER (3)
  123. SPRINKLER FIRE (5)
  124. SPRINKLER WATER (5)
  125. SPRINKLER-WATER (2)
  126. STEAM (6)
  127. STEAM RETURN (5)
  128. STEAM SUPPLY (7)
  129. STORM DRAIN (6)
  130. STORM SEWER (3)
  131. STORM WATER (4)
  132. SULFURIC ACID (2)
  133. SUPPLY (5)
  134. TEMPERED WATER (3)
  135. TOWER WATER (3)
  136. TREATED WATER (4)
  137. UNSAFE WATER (2)
  138. VACUUM (6)
  139. VAPOR (3)
  140. VENT (7)
  141. WASTE (4)
  142. WASTE OIL (2)
  143. WASTE WATER (5)
  144. WATER (5)
  145. WELL WATER (4)
  146. View more
Color
  1. Black (475)
  2. Blue (87)
  3. Brown (10)
  4. Clear (28)
  5. Gray (3)
  6. Green (379)
  7. Orange (113)
  8. Purple (7)
  9. Red (79)
  10. White (467)
  11. Yellow (394)
  12. Yellow on Purple (4)
  13. View more
Indoor or Outdoor Use
  1. Indoor Use (720)
  2. Outdoor Use (730)
Material
  1. Plastic (31)
  2. Polyester (177)
  3. Vinyl (553)
Item Type
  1. Electrical Markers (25)
  2. Pipe Marker (691)
Reflective
  1. Non-Reflective (743)
  2. Reflective (18)
Height
  1. < 2.00 in (97)
  2. 2.00 - 2.24 in (2)
  3. 2.25 - 3.99 in (639)
  4. 4.00 - 4.49 in (360)
  5. >= 4.50 in (446)
Width
  1. < 2.50 in (96)
  2. 2.50 - 7.49 in (163)
  3. 7.50 - 9.99 in (632)
  4. 10.00 - 12.49 in (593)
  5. 12.50 - 24.99 in (501)
  6. >= 25.00 in (433)
  7. View more
Diameter
  1. < 2.50 in (26)
  2. >= 2.50 in (1)

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