Gas Pipe Locating
The 3M™ Electronic Marker System (EMS) helps save time and money by enabling gas utility field crews to quickly pinpoint the location of buried facilities.
3M markers operate even in the presence of metal conduit or pipe, metallic conductors, fences, AC power lines and electronic markers of other utilities. All EMS markers used for gas pipe location are color-coded to APWA standards for visual reference and gas utilities have their own frequency, helping reduce the risk of accidentally locating and excavating other buried facilities. For gas utilities, all gas pipe location markers are yellow in color.
Using during construction, installation and maintenance helps eliminate the time consuming search for hard-to-locate facilities. 3M's EMS gas pipe location series can be used to locate:
- Main Stubs
- Meter Boxes
- Buried valves
- P.C Fittings
- Stopping Valves
- Depth Changes
- E.F Couplings
- Transition Fittings
- Squeeze Points
- Road Crossings
- Pipeline Paths
- Service Stubs
3M Locating & Marking Products
3M™ Dynatel™ Locators combine simple interfaces, large backlit high-resolution graphics, excellent balance and ergonomics with precision locating capabilities to help you quickly and accurately identify underground assets.
3M™ Dynatel™ Locators can be used to trace pipe and cable paths, locate sheath faults, provide accurate pipe, cable or Sonde depth measurements, locate buried electronic markers, read/write to 3M iD Markers and interface with GPS instruments to create accurate maps of underground facilities.
3M™ Dynatel™ Locators are available in a range of configurations from fully-featured pipe, cable, fault and electronic marker locators to basic cable avoidance systems.
3M™ Dynatel™ Locators
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It takes just minutes to learn to use the 3M Electronic Marker System (EMS), and finding buried markers is just as easy. The locator transmits an RF signal to the buried marker. The marker reflects the signal back to the locator, and the location is indicated with both a visual meter reading and an audible tone.
3M™ offers several varieties of electronic marker and multipurpose locators to meet your needs, offering different types and ranges, and the markers are also available in two forms - Passive and iD. Both options are designed to provide an accurate, convenient, long-lasting method of marking underground assets. Passive markers are designated by industry to mark points of interest. iD markers perform the same function, but can also be programmed to include customer-specific information such as facility data, type of application, material type and size, placement date and other important details.
3M offers a variety of marker options:
3M™ Ball Marker
Engineered for narrow trench applications up to 5' in depth, the 4"-diameter ball marker has a unique self-leveling feature that helps ensure an accurate, horizontal position regardless of how it is placed in the ground. The ball contains a mixture of water and propylene glycol (a common additive in toothpaste, hair gels etc. and generally recognized as safe for use in foods by USFDA). The mixture is readily biodegradable in the environment and will not harm humans, wildlife or the environment in this application.
3M™ Near-Surface Marker
The near-surface marker is ideal for marking underground and street access facilities up to 2' for Passive (Non-iD marker) and 3' for iD marker in depth. Its 3.5" long cylindrical size and shape allows for easy installation in asphalt, concrete or rock without extensive digging or drilling.
Designed for marking applications at depths up to 6', marker spokes in the 8.25" diameter mini-marker help stabilize it in the correct position after placement.
3M™ Full-Range Marker
The full-range marker is suited for deep applications up to 8'. Its 15"-diameter makes it ideal for use as a digging shield over sensitive underground facilities.
3M™ Disk Marker
Extended-range disk markers are four inches in diameter and have a vertical range of five feet. They provide an easy, accurate method of locating flush-mounted facilities which become covered by backfill or other obstructions, such as snow or vegetation. Easily affixed to the underside of non-metallic lids or covers. Not intended for direct burial in the soil.
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3M EMS Caution Tape has 3M Markers embedded into a caution tape, which would be installed above the buried facility and provide continuous path location. When energized using a 3M™ Dynatel™ 7000 Series Locator, the markers are activated. No external power source is needed and there is no need to hook up an external transmitter or search for access points. The tags work independently, so even if a section of caution tape is cut or removed, unlike tracer wire, the other markers on the tape would continue to provide accurate location. Each version of 3M EMS Caution Tape is tuned to a frequency specific to the path of that utility (gas, telco, water, wastewater) and can be located to a maximum buried depth of four feet.
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Southwest Gas Adopts
Electronic Markers for
Southwest Gas Corporation provides natural gas service to more than 1.7 million customers in Arizona, California and Nevada, a service area that includes the fastest-growing metropolitan centers in the country. Read story (PDF, 146k)
When the 2010 World Exposition opens on a two-square-mile site in Shanghai, China's largest city, the Expo's vast network of underground gas pipes will be tracked predominantly by radio frequency identification (RFID) from 3M. Read story (PDF, 133k)