These are all the specific activities required to prepare the oil or gas-in and to bring the plant in operation: 

• Put on pipe work and vessel on line (valves, PSV, locking devices…) 
• Check that all valves subject to a ‘‘locked status’’ are in the locked open or locked closed position, in accordance with the Approved drawings and procedures; 
• Check all isolations by spading and blinds are in accordance with the Approved drawings and procedures; 
• Establish the list of available equipment; 
• Prepare the ICSS inhibition sheets that list the inhibition that will be required for oil-in or gas-in; 
• Perform the audits and technical reviews scheduled to be necessary for the issuance of
• the ’’ready for oil/gas-in’’ certificate;
• Check that all punch list items needed to be cleared before start-up; 
• Complete first fills; 
• Ensure safety equipments and critical utilities availability and reliability;
• Carry out the final safety tests (ESD,F&G, deluge, …) ;
• Obtain final clearance for oil/gas in;

At this stage the ‘’Ready for Function Test Certificate’’ shall be issued. It relates to the specific ‘’oil/gas-in’’ milestone to which may be associated a number of prerequisite. 
After issuance of the ‘’Ready for Function Test Certificate’’ are performed all the following activities required to start-up the plant with first introduction of the feedstock into the plant :

• Bring the process in operation (Oil/gas-in, water injection…) 
• Carry out outstanding Commissioning Operational test 
• Carry out the Performance tests to prove the plant and equipment and design capacities products specifications, etc. 

Start-Up dossier 
All documentation pertaining to the Start-up activity is compiled in a specific Dossier. They contains all the information required to demonstrate that a system has reached the ready for hydrocarbon introduction status. 
Its content is the following: 

• First Start-Up sequence and procedure with all notes taken during the start-up for further update of the procedure 
• Marked-up P&IDs showing the status for blinds and spades at time of transfer to the OPERATOR. 
• Ready for Start-up Certificate 
• Updated Punch List 
• Operational Test Procedure, reports, and Operational Test Certificate carried out during the start-up phase 
• Routine Start-up procedures, Emergency and routine shutdown procedures.

Start-Up Engineering!

Start-up and performance test preparation 
It mainly includes the following activities, but not limited to : 

• Clear identification, programming and planning of the activities with / without Hydrocarbon (Methanol, Diesel, …) 
• Definition of ‘’ready for oil/gas-in’’ activities 
  
• Pre-requirements to start-up a task 
  
• Operational risk assessment and environmental assessment impact
  
• Resource/training/knowledge definition and certification as needed.
  

Start-Up Documents 

These activities typically include, but not limited to: 

• Gather VENDOR and PROCESS LICENSOR START-UP documentation. 
• Prepare detailed start-up procedures
  
• Prepare associated start-up check lists 
  
• Define list and description of ‘’ready for oil/gas-in’’ activities (technical checks, safety audits, organizational audits, etc…) 
  
• Prepare detailed Performance Test Procedures. 
  
• Prepare planning, resource mobilization plan, etc… 
  
• List documents to be included in the ‘’Ready For Operation’’ dossier. 
  

Start-Up performance 
The team in charge of start-up shall conduct the ‘’ready for oil/gas-in’’ activities.