The main objective of the Basic Engineering phase, also known as Front-End Loading 2 (FEL2) or the Pre- Front-End Engineering Design (Pre-FEED) phase, is to define the scope, cost, and schedule of a project.
Key deliverables for this Basic Engineering/FEL2 phase includes:
1. Process Flow Diagrams (PFDs)
Detailed diagrams showing all major process units, process streams and control loops. Some high level utility information is also shown in these drawings.
2. Piping and Instrumentation Diagrams (P&IDs)
For the main process units and utilities, P&IDs are developed to show details of major equipment, piping and instrumentation / controls.
3. Equipment Data Sheets and Mechanical Equipment List
Detailed process specifications for each piece of major equipment, including dimensions, materials of construction, operating conditions, and performance requirements. This includes vessels, pumps, compressors, heat exchangers, filters, storage tanks and other miscellaneous equipment. A detailed list of all mechanical equipment with some high level specifications such as design conditions, volume, material of construction etc. is prepared.
4. Heat and Material Balances
A detailed heat and material balance is developed using the simulation. At this stage all major mass and heat balance information such as maximum throughput, product capacity, raw material consumption etc. is finalized. Multiple cases of the heat and material balance may be developed to depict various product grades or catalyst activity such as start of run (SOR) and end of run (EOR).
5. Plot Plan
The plot plan defines the physical layout of the facility. In addition, a general arrangement drawing showing the arrangement of major equipment, buildings, and infrastructure on the site is also developed. This includes space for maintenance access, safety zones, and future expansions.
6. Preliminary Piping Layouts
A high level routing of process and utility piping including location of main pipe racks and sub-headers are developed at this time.
7. Electrical Single-Line Diagrams (SLDs)
One line Diagrams showing the main electrical components (e.g., transformers, switchgear, motors) and their connections are produced in this phase.
8. Instrument Index
A list of all instrumentation (instrument index) required for the project is prepared based on the P&IDs.
9. Process Controls Narrative
This is a document that describes how the process will be controlled, including control loops, alarm systems, safety interlocks, and automation levels.
10. Preliminary PHA
A Preliminary Process Hazard Analysis (PHA) review is conducted by the team to identify major process hazards involved in the process and any mitigation measures that might be required.
11. Project Execution Plan
The project execution plan outlines the schedule, resource allocation, and strategies for project management, procurement, construction, and commissioning.
12. Total Installed Cost Estimate (Class 3)
A detailed estimate of Total installed cost that reflects the cost of equipment, piping, instrumentation, other materials like concrete and steel, labor, and contingencies, with an accuracy of ±10-20%.
13. Environmental and Regulatory Compliance Plan
A summary of environmental impact for air, water and solid wastes is generated. This summary is then used to prepare required permits and plans for waste management and emissions control.