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Industry Glossary Term

C3+ Stream

A natural gas liquid (NGL) mixture containing propane, butane, and heavier hydrocarbons separated during processing. Subcontractors working at gas plants or fractionation facilities will handle, transport, or maintain equipment tied to this product stream. Understanding its composition helps crews follow correct handling, storage, and safety protocols on site.

Related Terms

Trade Contractor

Industry

A specialised subcontractor hired to perform a specific skilled trade, such as electrical, welding, or pipefitting. They are typically engaged by a general contractor rather than the project owner directly. Trade contractors are responsible for supplying their own tools, crew, and trade-specific certifications.

ABC (Associated Builders and Contractors)

Industry

A U.S. trade association representing merit-shop contractors in construction and industrial sectors. Subcontractors use ABC membership for training resources, safety programmes, and industry networking. Membership can also signal credibility when bidding on open-shop projects.

Utility-Scale Storage

Industry

Large battery or energy storage systems that supply power to grids or remote job sites. For subcontractors, these projects involve specialised electrical, civil, and commissioning crews. Work often includes foundation pours, equipment installation, and grid tie-in under strict utility standards.

PPA (Power Purchase Agreement)

Industry

A long-term contract where a buyer agrees to purchase electricity from a generator at a fixed price. For subcontractors, PPAs on large sites can affect whether temporary or permanent power infrastructure is in scope. Understanding site power arrangements helps clarify mobilisation costs and equipment requirements.

Hydrotesting

Industry

A pressure test using water to verify the integrity of pipelines, vessels, or equipment before commissioning. Subcontractors are often scoped separately for hydrotest labour, equipment, and water disposal. Confirm whether these costs are included in your contract or billed as extras.

Capital Maintenance

Industry

Planned work that restores or extends the life of major assets, such as facilities or equipment. For subcontractors, these projects are typically larger in scope and budget than routine maintenance. They often require formal tendering, detailed scopes of work, and milestone-based billing.

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