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IndustryGlossary Term

Corrosion Circuit

A closed electrochemical loop where metal loss occurs between anodic and cathodic areas on a structure. Subcontractors performing inspection or coating work must identify and document active circuits to meet integrity requirements. Unreported corrosion circuits can trigger liability issues and scope disputes on site.

Related Terms

Geosteering

Industry

The real-time technique of guiding a drill bit through a target formation using geological data. Subcontractors supporting drilling operations may be called in on short notice as geosteering decisions change well paths. Expect scope adjustments and rapid crew or equipment mobilisation when geosteering is active.

Secondary Stress

Industry

Indirect mechanical stress that develops in structures or piping due to thermal expansion, settlement, or equipment movement. Unlike primary stress, it isn't caused by direct applied loads. Subcontractors must account for it during installation and inspection to avoid material fatigue and warranty disputes.

Pipeline Integrity

Industry

The ongoing process of ensuring pipelines remain safe, structurally sound, and compliant with regulatory standards. Subcontractors are frequently hired for inspection, maintenance, and repair work tied to integrity programmes. Scopes can include ILI (Inline Inspection), coating repairs, hydrotesting, and fitness-for-service assessments.

Liquefaction Train

Industry

A complete processing system that cools natural gas into liquid LNG (Liquefied Natural Gas) for storage and transport. Each train is a major construction and maintenance scope, often requiring large, specialised subcontractor workforces. Shutdowns and turnarounds on these units are high-value contracts with strict schedule demands.

Hydrovac

Industry

A truck-mounted unit that uses pressurised water and a vacuum system to excavate soil safely around buried utilities. Subcontractors are frequently hired for hydrovac work on pipeline, civil, and utility projects. It is preferred over mechanical digging in areas with high strike risk.

M&A (Mergers and Acquisitions)

Industry

When two companies combine or one buys another, reshuffling vendor lists and contract structures. Subcontractors may face renegotiated rates, new prequalification requirements, or lost preferred-supplier status. Monitor client M&A activity closely — approved contractor rosters often get cut during integration.

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