GPR Survey for City Gas Distribution & Pipeline Networks

Mezux Touch surveys gas distribution networks to a higher confidence threshold than other utility work, because the failure mode is different. A struck water line is a wet trench; a struck medium-pressure gas main is an evacuation, a regulatory notification and potentially an injury. In practice that means three things: detection alone is not accepted as clearance at critical crossings, physical verification is recommended far more readily, and probable gas routes are reported in their own category rather than mixed into a general utility layer where a busy site engineer might miss them.

How the work is run

Electromagnetic locating covers steel mains and any line with a surviving tracer wire; radar is what makes bare MDPE detectable at all, and the two are run together and reconciled. Where an accessible entry point exists a sonde is introduced to trace non-metallic pipe directly, which is the highest-confidence non-intrusive option. Cover depth is recorded continuously rather than sampled, because resurfacing and widening reduce it over time and the variation is the finding. Deliverables follow the licensee's own permit and third-party-damage-prevention procedures rather than our house format.

What you receive

Gas routes issued in their own layer and their own reporting category, kept visually distinct from general utilities so they cannot be misread on a busy drawing. A continuous cover depth record along the alignment, which for a licensee is an auditable compliance record rather than only an engineering one. Confidence stated per feature, with critical crossings explicitly nominated for physical verification. Asset naming and pressure-tier conventions matched to the licensee's own standard, agreed before drafting. For third-party contractors, pre-excavation clearance issued in the form the licensee's permit process expects.

Beyond the basics

Can you locate MDPE and plastic gas pipe? Yes, which is the main reason radar is used here at all, since electromagnetic locating sees only conductive targets. Detection is not guaranteed in every soil.

Why recommend trial holes more often on gas work? Because detection alone is not treated as clearance at critical crossings. The failure mode is an incident rather than a repair, which changes the threshold.

Can you audit cover depth across our network? Yes, recorded continuously rather than sampled. Resurfacing and widening reduce cover over time, and the record shows where remediation should be prioritised.

Do you work for contractors excavating near a live main? Regularly, in a form that satisfies the licensee's permit process. It is invariably cheaper than the consequence of proceeding without it.

Does the network need shutting down? No. Survey is entirely surface-based with the system live and in normal operation, which is one of its practical advantages.

Terms used on this page

MDPE — medium-density polyethylene gas pipe, invisible to electromagnetic locating because it carries no conductive path. Tracer wire — a conductor laid alongside plastic pipe to make it locatable, frequently damaged or absent. Cover depth — the material above a main, a regulatory matter on a gas network as well as an engineering one. Third-party damage — excavation by someone other than the licensee, the largest single cause of network damage. Pressure tier — the operating pressure class of a section, which governs both consequence and permit requirements.