A 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.
Failure Assessment Diagram (fad)
Related Terms
Hydraulic Fracturing
IndustryA well stimulation process where fluid is pumped at high pressure to crack subsurface rock and release oil or gas. Subcontractors are commonly engaged for pump operations, fluid handling, and equipment transport during frac campaigns. Work is often fast-paced and shift-intensive, with strict site access and safety requirements.
Long-Cycle
IndustryRefers to large capital projects with lead times and development phases spanning several years. For subcontractors, long-cycle work offers extended contract visibility but requires patience on mobilisation and payment timelines. Budget cycles and scope changes are common over the project life.
IMR (Inspection, Maintenance, and Repair)
IndustryA category of ongoing field service work covering routine inspections, preventive maintenance, and corrective repairs on infrastructure or equipment, often awarded to subcontractors through standing agreements or blanket contracts. For field service companies, IMR scopes provide a reliable stream of recurring work but typically require crews to mobilise quickly and hold multiple trade certifications to meet operator requirements.
SPR (Strategic Petroleum Reserve)
IndustryA government-held emergency stockpile of crude oil that, when released or replenished, can trigger short-term surges in drilling, transportation, and maintenance contracts as operators respond to shifting supply directives. Field service companies should monitor SPR activity as an indicator of near-term work mobilisation and pricing conditions in their region.
Field Ticket
IndustryA document created in the field that records work performed, equipment used, materials consumed, and time spent. Field tickets are the basis for invoicing and must typically be approved by the customer before payment.
LNG (Liquefied Natural Gas)
IndustryNatural gas cooled to -162°C to become liquid for easier transport and storage, creating specialized work opportunities for subcontractors in cryogenic equipment maintenance, pipeline construction, and terminal facilities that require specific safety certifications and cold-weather expertise.
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