Metal Detectable Warning Tape
 | Metal Detectable Warning Tape
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Product Description
Metal detectable warning tape is installed above buried utility routes to help crews trace the line before excavation and notice a clear warning layer during trenching. Danger Ribbon Company is the manufacturer of this underground warning product for electric, gas, water, sewer, telecom, fiber optic, and other buried services. The tape combines a continuous metal detectable layer, APWA-style colors, and custom printed utility legends, helping reduce wrong-line excavation, service interruption, and avoidable underground utility damage.
Product Photos
Technical Data Sheet
Item | Typical Value |
Product Type | Metal detectable underground warning tape |
Base Film | PE or LDPE warning film |
Detectable Layer | Aluminum foil or metal detectable layer |
Total Thickness | 100 um to 150 um typical factory test range |
Foil Layer Thickness | 8 um to 20 um typical value |
Standard Width | 50 mm, 75 mm, 100 mm, 150 mm, 300 mm |
Standard Roll Length | 150 m, 250 m, 300 m, or 305 m |
Width Tolerance | +/- 2 mm typical factory control |
Length Tolerance | +/- 2 percent typical factory control |
Printing Method | Surface or reverse printing with repeated warning legend |
Common Text | Electric, gas, water, sewer, telecom, fiber optic, or custom wording |
Color Options | APWA red, yellow, blue, green, orange, purple, white |
Tensile Strength | 18 MPa to 28 MPa typical factory test range |
Elongation | 250 percent to 450 percent typical value |
Moisture Resistance | Suitable for normal buried soil exposure |
Detection Check | Tested with suitable locating equipment under sample conditions |
Soil Contact Performance | Sample test observation recommended before project use |
Storage Condition | Keep dry, clean, and away from direct sunlight before use |
Benefits
- Helps crews trace buried utility routes before excavation when used with suitable locating equipment and proper field practice.
- Provides a visible warning layer before the pipe, duct, cable, or conduit is reached.
- Supports color matching for electric, gas, water, sewer, telecom, fiber optic, and reclaimed water routes.
- A custom printed utility legend helps match project drawings, utility ownership, language needs, and field identification requirements.
- Sample rolls can be checked for metal layer continuity, detection response, print clarity, and roll width tolerance before bulk use.
- Typical factory control keeps roll width within +/- 2 mm and roll length within +/- 2 percent for consistent project planning.
- Typical factory test range includes 18 MPa to 28 MPa tensile strength and 250 percent to 450 percent elongation, helping the tape resist normal handling during trench placement.
- PE laminated construction supports normal buried soil exposure, with sample testing recommended for wet, compacted, or chemically affected soil conditions.
Product Overview
This underground detectable warning tape is made for buried utility identification, not for food detection, surface marking, or foil sealing. It is normally placed above pipes, cables, ducts, or conduit so the route can be checked before digging and the warning message appears before the utility line is reached. For civil construction, roadwork, municipal maintenance, and telecom installation, this gives field crews a practical reference layer between the ground surface and the buried service.
The tape uses a laminated PE structure with an aluminum foil detectable layer inside. In sample field checks, this layer helps suitable locating equipment follow the buried tape path, especially above plastic pipes, PVC ducts, irrigation lines, and fiber optic routes where the service itself may not be easy to trace directly. Because site conditions, equipment settings, burial depth, and operator practice can affect detection response, sample validation is recommended before large project use.
Printed legends are repeated clearly along the roll and can match the service below, such as “CAUTION BURIED ELECTRIC LINE BELOW,” “CAUTION BURIED GAS LINE BELOW,” “CAUTION BURIED WATER LINE BELOW,” or “CAUTION BURIED FIBER OPTIC LINE BELOW.” APWA-style colors also make the service easier to recognize during trenching, especially where electric, gas, water, sewer, and communication routes are installed in the same work area.
Applications
- Buried electric power lines and underground cable routes
- Natural gas, oil, steam, and petroleum service warning
- Potable water, reclaimed water, and irrigation pipe identification
- Sewer, drain, and stormwater utility marking
- Telecom cable, communication duct, CATV, and fiber optic routes
- Municipal utility projects, trenching work, roadwork, and civil construction
- Non-metallic pipe, plastic duct, irrigation, and fiber optic routes that need a detectable underground utility marker before future excavation
How does metal detectable warning tape help crews before excavation?
Metal detectable warning tape gives excavation teams two practical checks: a traceable signal before digging and a visible warning layer during soil removal. The continuous embedded metal layer helps suitable locating equipment check the buried tape path, especially above plastic pipes, PVC ducts, and fiber optic routes. Once the tape is exposed, the APWA color and repeated printed legend help crews identify whether the line below is electric, gas, water, sewer, telecom, or another service.
What should be checked before selecting tape for an underground utility project?
Before selecting buried utility warning tape, confirm the utility type, planned burial depth, tape width, printed wording, APWA color, and expected detection method. Deeper or higher-risk utility routes often need wider tape to improve visibility and locating response during future excavation work. A sample roll can be checked for detection response, metal layer continuity, roll width tolerance, print repeat clarity, APWA color matching, and whether the aluminum foil detectable layer fits the planned field locating method.
Loading Details
FAQ
Can this tape be detected before excavation?
Yes. The metal detectable layer can support locating before excavation when used with suitable detection equipment, proper field practice, and suitable site conditions.
Which colors are used for different utilities?
Common APWA-style colors include red for electric, yellow for gas, blue for water, green for sewer, and orange for telecom or communication lines.
Can the warning text be customized?
Yes. Custom printed legends can be made for electric, gas, water, sewer, telecom, fiber optic, or project-specific wording.
Is this the same as ordinary caution tape?
No. Ordinary caution tape only provides visual warning, while this product includes a detectable metal layer for buried utility identification.