The base material or surface that a coating, lining, or treatment is applied to, such as steel pipe, concrete, or wood. Subcontractors must assess substrate condition before starting surface prep or application work. Poor substrate quality can affect adhesion, warranty, and job acceptance.
Substrate
Related Terms
STEO (Short-term Energy Outlook)
IndustryA monthly U.S. Energy Information Administration report forecasting near-term oil, gas, and energy prices. Subcontractors use it to anticipate upstream spending trends and project demand for field services. Shifts in STEO forecasts often signal whether operators will ramp up or cut back work programmes.
Hydrostatic Testing
IndustryA pressure integrity test where pipelines, vessels, or equipment are filled with water and pressurised to detect leaks or weaknesses. Subcontractors are often hired to perform or witness these tests before commissioning. Proper documentation is critical, as clients and regulators require certified test records.
Leasehold
IndustryLand or mineral rights an operator has legally secured through a lease agreement with the landowner or Crown. Subcontractors typically work within leasehold boundaries, so access, permitting, and site rules are set by the operator holding the lease. Understanding leasehold limits helps crews avoid trespassing on adjacent unlicensed areas.
Alternative Delivery
IndustryA project procurement model where design and construction are bundled under one contract, such as design-build or EPC. Subcontractors often engage through a prime contractor rather than directly with the owner. Scope, risk, and payment terms can differ significantly from traditional bid-build arrangements.
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.
Dewatered Sand
IndustrySand or granular material that has had excess water removed, typically through drainage or mechanical separation on site. Subcontractors handling dewatered sand face stricter disposal and hauling requirements than wet slurry. Confirm moisture content specs before mobilising equipment or quoting removal work.
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