One team, every discipline
How each engineering discipline contributes to FEED — coordinated through one lead engineer, one model and one document register.
- 8Disciplines
- 1Integrated model
- 4-levelChecking
Process
Completes the process definition to a level that supports EPC bidding and FID.
Key deliverables
- IFD P&IDs and PFDs
- Relief and flare studies
- Process data sheets
- Cause and effect diagrams
Piping & Layout
Develops the FEED 3D model, layouts and material take-offs.
Key deliverables
- Plot plans and GA drawings
- Critical line stress screening
- Piping MTOs
- Piping material specifications
Mechanical (Static & Rotating)
Specifies and enquires all major equipment with technical bid evaluation.
Key deliverables
- Equipment data sheets and specs
- Requisitions and TBEs
- Package unit specifications
- Long-lead purchase support
Civil & Structural
Designs primary structures and foundations to reliable quantity level.
Key deliverables
- Structural and civil design basis
- Key foundation and structure design
- Building layouts
- Civil and steel MTOs
Electrical
Develops the electrical system and performs the principal power studies.
Key deliverables
- Single line diagrams
- Load flow and short circuit studies
- Hazardous area classification
- Cable and equipment MTOs
Instrumentation & Control
Defines the automation system and completes SIL assessment.
Key deliverables
- Instrument index and data sheets
- DCS / SIS / F&G specifications
- SIL classification
- Control narratives
HSE & Process Safety
Closes out safety studies so the design is robust before EPC.
Key deliverables
- HAZOP and SIL workshops
- Fire and explosion studies
- Escape and evacuation layout
- Safety action close-out
Project Controls & Estimating
Produces the FID-grade estimate and EPC bid package.
Key deliverables
- AACE Class 3 estimate
- Level 2 / 3 schedule
- EPC ITB package
- Execution strategy
HAZOP-ready process definition
P&IDs and safeguarding are finalised through structured safety reviews, and all recommendations are closed out in the FEED deliverables.
- Issued-for-Design P&IDs to ISA 5.1 symbology
- HAZOP, HAZID and SIL assessment (IEC 61511) support and close-out
- Relief & flare study to API 520 / 521
- Cause & effect diagrams and safeguarding memoranda
- Line list, tie-in list and process data sheets
3D model & MTO-based quantities
A FEED-level 3D model (for example AVEVA E3D, Hexagon SmartPlant 3D or AutoCAD Plant 3D) is used for layout development, constructability reviews and material take-offs.
- Plot plans, equipment layouts and 30% model review
- Piping material specifications (ASME B31.3) and critical line stress review
- Mechanical data sheets and requisitions for long-lead equipment
- Structural design basis, pipe rack and foundation concepts
- Electrical load list, SLDs and hazardous area layouts (IEC 60079)
- Instrument index, control system architecture and specifications
Estimate & ITB for FID
The FEED closes with the documents needed to take the investment decision and to run a competitive EPC tender.
- AACE Class 3 cost estimate (typically −10% to −20% / +10% to +30%)
- Bulk MTOs for piping, steel, concrete, cable and instruments
- Level 3 schedule and project execution plan
- EPC Invitation-to-Bid technical package and scope of work
- Technical bid evaluation support
Frequently asked questions
What deliverables are included in a FEED package?
Typically: HAZOP-reviewed P&IDs, plot plans and layouts, equipment data sheets and specifications, piping material specifications, electrical SLDs and load lists, instrument index and control architecture, FEED 3D model, bulk MTOs, Class 3 estimate, Level 3 schedule and the EPC ITB package.
What estimate accuracy does FEED achieve?
An AACE Class 3 estimate, typically −10% to −20% on the low side and +10% to +30% on the high side, depending on the level of vendor pricing and design definition.
Which codes and standards do you apply?
Project-specific codes such as ASME B31.3, ASME Section VIII, API 520/521, API 610/650, IEC 60079 and IEC 61511, together with client and national standards.
How long does a FEED take?
Usually 4 to 9 months depending on plant size and complexity. Long-lead equipment requisitions can be issued early to protect the EPC schedule.
Can the FEED model be carried into detail engineering?
Yes. We set up the model and catalogues so that the EPC contractor can continue directly into detail design without re-modelling.
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