A connection point where a new pipeline is joined to an existing high-pressure transmission system. Subcontractors typically handle welding, purging, and pressure testing during a planned outage window. Tie-in scopes often require strict scheduling coordination and certified welding procedures.
Transmission Tie-in
Related Terms
Frontage Road
IndustryA secondary road running parallel to a highway, providing access to adjacent worksites, lease roads, or staging areas. Subcontractors often use frontage roads for heavy equipment moves or crew dispatch without entering main traffic. Confirm load restrictions and municipal permits before routing oversized hauls.
Processing Train
IndustryA series of vessels and equipment that separates wellhead fluids into oil, gas, and water. Subcontractors are often scoped to one train at a time, so know which train your work order covers. Shutdowns or upsets on your train can directly affect your crew's schedule and completion milestones.
Secondary Stress
IndustryIndirect mechanical stress that develops in structures or piping due to thermal expansion, settlement, or equipment movement. Unlike primary stress, it isn't caused by direct applied loads. Subcontractors must account for it during installation and inspection to avoid material fatigue and warranty disputes.
Core Desorption
IndustryA lab process where gas is measured as it releases from rock core samples pulled during drilling. Subcontractors handling or transporting cores must follow strict protocols to preserve sample integrity. Mishandling can compromise data and trigger costly disputes with operators.
Voluntary Cuts
IndustryAgreed reductions in oil production by member nations, typically OPEC (Organization of the Petroleum Exporting Countries) members, to stabilise prices. For subcontractors, these cuts often trigger project deferrals, reduced scope, and slower mobilisation schedules. Budget freezes from operators frequently follow, directly impacting field service award timelines.
Integrated Project Delivery (ipd)
IndustryA project delivery model where owners, contractors, and subcontractors share contracts, risks, and rewards from early design through completion. Subcontractors are brought in earlier than traditional models, giving more input on planning and scheduling. Compensation is often tied to collective project outcomes rather than individual scope performance.
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