Robotics-as-a-Service & Technology Deployment
Gas Main Inspection

Live Gas Main Inspection Technology from ULC “Crosses the Pond”

The Large VGC Inspection Crawler from ULC Robotics was successfully utilized to inspect several large diameter cast iron gas mains operated by Scotia Gas Networks (SGN) in the suburbs of London and another city south of London. The real-time video provided by the crawler allowed SGN to assess their mains, looking for pipeline features and debris that may hinder future projects at the selected locations.

Inspections with the Large VGC as well as other cameras and crawlers from ULC are capable of launching into and operating in live gas mains, so gas utilities such as SGN do not need to disrupt service to customers. In urban areas such as London, shutting down gas service in one main could lead to the costly and resource-heavy burden of relighting gas appliances in customers’ homes or putting all residents on bottle service.

sgn gas main inspection


Scotia Gas Networks delivers natural gas to 5.8 million customers in the United Kingdom. Their service territory covers all of Scotland and parts of England, including a section of London.

The Large VGC Crawler from ULC Robotics was purpose built to inspect live 18”-48” gas mains without allowing methane to escape. The tethered crawler enters the gas main using a launch tube that mounts vertically onto a valve in a minimally sized pit and only requires a 4” tap hole in the main. Once inside the main, the Large VGC is capable of traveling 750’ in either direction of the entry point for a total inspection distance of 1,500’.

ULC Robotics

About ULC Robotics

ULC Robotics is a leader in developing and deploying innovative robotic technology and processes that help pipeline operators and energy companies repair, inspect and assess their infrastructure. Our team of engineers, machinists, project managers, field technicians and support staff work daily to find solutions to challenging energy industry problems.

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