The phase where completed systems and equipment are tested, verified, and handed over to the client as fully operational. For subcontractors, it often means intensive punch-list work, inspections, and sign-offs before demobilisation. Scope creep is common during this phase, so track all additional hours carefully.
Commissioning
Related Terms
FLNG (Floating Lng Unit)
IndustryAn offshore vessel that processes, liquefies, and stores natural gas at sea without a fixed onshore plant. Subcontractors work aboard these units for commissioning, maintenance, and inspection scopes. Access is offshore, so mob costs, safety certifications, and logistics are major bid considerations.
Trenchless Technology
IndustryMethods for installing or repairing underground pipelines and conduits without open-cut excavation. Common techniques include HDD (Horizontal Directional Drilling) and pipe bursting. Subcontractors specialising in these methods often command premium rates due to reduced surface disruption and specialised equipment requirements.
Failure Assessment Diagram (fad)
IndustryA FAD is an engineering tool used to assess whether a crack or defect in a component is safe to operate or requires immediate repair. Subcontractors use FAD assessments to support fitness-for-service decisions on pressurised piping, vessels, and structural welds. Results directly influence repair scopes, shutdown planning, and liability on field service contracts.
Onshore Acreage
IndustryLand-based areas leased or licensed by operators for exploration and production activities. For subcontractors, it defines where field work is scoped, mobilised, and contracted. Acreage size and location directly affect crew logistics, travel costs, and service demand.
Trenchless
IndustryA method of installing or repairing underground pipelines and conduits without open excavation. Techniques include horizontal directional drilling (HDD) and pipe bursting. Subcontractors working trenchless scopes need specialised equipment and certified operators.
Third-Party Contracting
IndustryAn arrangement where a primary contractor hires an outside company to perform specialised work on a project. For subcontractors, this defines your position in the contracting chain and affects payment terms, liability, and site access. Knowing your tier level helps clarify who you invoice and who manages your compliance requirements.
Latest Industry News
Mesa's $168M Signal Butte Plant Expansion Nears Fall Commissioning
Mesa, Arizona is doubling the Signal Butte Water Treatment Plant's capacity to 48 mgd in a $168 million CMAR project led by McCarthy Building Cos., with commissioning set to run October through December 2026.
1 month agoIndustryEnerMech Completes Gulf of Mexico Pipeline Flushing Work for Subsea7 Decommissioning Program
EnerMech has finished a deepwater pipeline flushing and cleaning project for Subsea7 in the U.S. Gulf of Mexico, achieving hydrocarbon-free status as part of a broader offshore field decommissioning campaign.
3 months agoIndustryPRIO's Wahoo Field in Brazil Reaches Commissioning Phase, First Oil Days Away
Brazilian operator PRIO has completed installation and received its operating license for the Wahoo field in the Campos basin, with first oil expected within days via a subsea tie-back to the FPSO Frade.
6 months agoComplianceCSB Update: Fatal H2S Release at WV Refiner Tied to Missing Decommissioning Procedures
The U.S. Chemical Safety Board's ongoing probe into a fatal April 2026 hydrogen sulfide release at Catalyst Refiners in Institute, West Virginia, found workers lacked gas monitors and proper respirator filters during decommissioning work.
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