PARIFEX‘s expertise covers entire projects life cycle. We intervene in the pre-engineering phase through:
  • Opportunity studies
  • Feasibility studies
  • Basic Engineering
  • Front End Engineering

The aim is to determine wether a project is technically and economically feasible, and estimate the profitability:

  • Design of the plant
  • Production schedule of the plant
  • Process description of the plant
  • Consideration of environmental issues (building & operating permits)
  • Consideration of lay-out opportunities (land sourcing)
  • Detailed capital and operating costs estimates
  • The economic model of the project


  • Conceptual process studies (mateial balances, process  flowsheets,…) and preliminary plot plan
  • Preliminary Piping and Instrument Diagrams
  • Definition and sizing of main equipment resulting in process specifications
  • Specification of effluents
  • Definition of control and safety devices


  • Mechanical data sheets of the main equipment,
  • Thermal rating of heat exchangers
  • Preparation of tender packages for the main equipment
  • Development of process and utility PIDs released for detail engineering
  • Development of detailed plot plans and hazardous areas
  • Elaboration of the main piping, instrument, electrical and civil works layout


The Detailed Engineering phase aims to further elaborate each aspect of a project by a complete description through modeling, drawings and specifications. This phase also includes procurement. Generally speaking, the detailed studies aim to prepare and authorize the beginning of the construction phase.

PARIFEX expertise in ICSS Control Narrative design

PARIFEX design ICSS Control Narratives for FPSO projects and other FPU, we have for instance designed the ICSS Control Narratives for USAN, CLOV, ICHTHYS and MOHO Nord projects.

ICSS Control Narrative design for FPSO Projects and Offshore platforms

  • Hull & Topside Control Narratives

            Process, Utilities
            Packages Interface
            HMI Design

  • Database Management    
  • FAT & Start-Up participation


PARIFEX, as an expert in control system, has developped high competencies in reverse engineering with great references on revamping projects, combining maintenance and revamping works. Our expertise allow us to offer our clients a guaranteed performance on complex operations and its execution in the required time scales.

PARIFEX Services in Reverse Engineering

Engineering survey related to the field Instrumentation, Logic Control Systems and Industrial Data Processing.

  • On site survey for documentation update (PIDs, connection and loop diagrams,…)
  • Instrumentation Database (SPI / S4I / AVEVA) management
  • Reverse engineering on existing system (PLC or ICSS)
  • Control Narratives
  • Audit on Control system architecture



  • Preparation of the DCS revamping from Alspa C350, C370, P5200 to Emerson DeltaV (3 main platforms GRM-PFC, GRM1, GRM-PFH, 6 satellite platforms AYM, BAM, MAM, GRM2, GNM, GENM)
  • Requirement to udpdate for each site: S4I Instrument List, PID, Safety logic diagrams, loop diagrams, PLC Inputs/Outputes, cabinet drawngs, wiring diagrams.

PACF1 Offshore Platform (Sonangol P&P Angola -2009):

  • FEED and survey for Control System revamping

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