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Industry Glossary Term

Hookup

The phase where installed equipment and systems are connected to utilities, instrumentation, and process lines. For subcontractors, hookup work often follows construction and represents a distinct, billable scope. Crews must coordinate closely with commissioning teams to avoid delays.

Related Terms

Inversion (pipe Lining)

Industry

A trenchless pipe rehabilitation method where a resin-saturated liner is turned inside-out into an existing pipe using water or air pressure. The liner cures in place, forming a new pipe within the old one. Subcontractors are typically scoped for setup, inversion equipment operation, and post-cure inspection.

Instrumentation Upgrades

Industry

Replacement or modernisation of sensors, transmitters, and control devices on existing facilities. For subcontractors, this work is often scoped as short-duration projects requiring certified instrumentation technicians. Tight commissioning deadlines and client-supplied materials are common on these jobs.

Combined-Cycle

Industry

A power generation system that uses both gas and steam turbines to maximise efficiency. Subcontractors working these facilities must be prepared for complex, multi-system shutdowns and specialised maintenance scopes. Expect longer turnaround windows and stricter equipment handling requirements.

Battery Tolling Agreement

Industry

A contract where a subcontractor operates a battery energy storage system on behalf of an asset owner, earning a fee without owning the asset. Common on remote sites and camps where third-party power management services are contracted out. Subcontractors are paid for capacity and availability, not energy consumed.

Gas-Directed Rig Count

Industry

The number of drilling rigs actively targeting natural gas formations at a given time. A rising gas-directed rig count signals increased demand for field services and subcontractor crews. Tracking this metric helps you anticipate work volumes and mobilisation timelines in gas-heavy basins.

HDPE (High-density Polyethylene)

Industry

A durable, corrosion-resistant plastic used for pipes, containment liners, and fluid transfer systems on job sites. Subcontractors commonly install or tie into HDPE pipelines in water, gas distribution, and environmental remediation scopes. Its lightweight nature reduces handling costs but requires certified fusion welding for pressure-rated connections.

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