Concept to Commercialization R&D
Field Deployment of Advanced Technology

Large VGC Live Gas Main Crawler Inspection System

The Large Variable Geometry Crawler (VGC) provides gas utilities with live, high-resolution video inspection of large diameter steel or cast iron gas mains ranging in diameter from 18″ up to 48″. Using the Large VGC, utilities can assess the conditions of their mains as well as locate cracks, damaged pipe, unknown branches, service tees, valves, fittings and water intrusion or debris. Pipelines can be inspected without the hassle and costs of taking a main out of service.

Diameter Range:
18″-48″ / 450+mm

Materials:
Cast Iron, Steel & Plastic

Max Pressure:
99psi / 6.8bar

Min Drilling:
4″ NPT or 4.5″ Drilling

Camera Type:
Wide Angle, Pan/Tilt

Tether Length:
750′ / 228m

Large VGC: Key Benefits

01. High Resolution Pan/Tilt

Using the onboard pan/tilt camera, the Large VGC allows gas utilities to perform a detailed inspection of the main and features within the main.

02. Reduced Excavation

With motorized navigation, the Large VGC has the ability to inspect up to 1,500 feet of your live, large diameter mains through one small excavation.

03. Perform Live Inspections

The Large VGC is capable of launching no-blow into 18”-48” gas mains to avoid the disruption and cost associated with shutting down the main and restoring services.

04. Locate Pipeline Features and Damage

In addition to being used for pre- and post-rehabilitation surveying, the Large VGC can locate features such as branches, cross tees, service lines, stub services and valves as well as pipeline damage.

05. Navigate Past Debris

The tracks on the Large VGC expand to elevate the crawler off of the bottom of the main to navigate past debris and dirt that is commonly found at the base of older gas mains.

06. Gain Access to Valuable Pipeline Data

The pipeline data obtained using the Large VGC helps gas utilities assess the conditions inside gas mains and prioritize maintenance tasks.

07. Simplified Controls and Operation

Simple controls allow the operator to focus on inspecting the main rather than controlling the inspection crawler.

08. Optimal Camera Position

Once inside the main, the Large VGC pan/tilt camera is positioned above the bottom of the pipe to ensure a high quality inspection of the entire main, not just the bottom of the pipe.

High Quality and Reliable Inspections of Live Gas Mains

Gas Main Inspection Crawler

Gas Main Pan Tilt Camera

Internal Cast Iron Joint Inspection

High Pressure Gas Pipe Crawler

Next Steps

Have a question? Use the form below to ask a question about the Large VGC and a member of the ULC team will respond as soon as possible.

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