EPC:Process,Mechanical and Piping Workflow

A good planner need to familiarise with the concept of engineering workflow. In the process of planning a planner will need to study the dependencies and required deliverable in engineering. The work network below is shows the links and dependecies among the process, mechanical and piping engineering deliverables ( source : www.toolboxforplanning.com ).

 

 

The diagram shows the input of process/utility engineering flow scheme (PES/UFS) drawing is the process flow scheme or process flow diagram (PFD) and process study. The input of engineering data requisition sheet for mechanical equipment is the process data sheet consist of fluid properties, temperature and pressure rating. The requisition for equipment's can be prepared when the specification and process data sheets are available.

The technical and commercial analysis report to be submitted to client and finalized prior to issue purchase order to equipment suppliers. The equipment loading data which is the inputs for civil and structure would be available after the vendor started working on equipment drawings.

The plot plan is started to prepare when the process flow diagrams includes major equipment tap numbers are confirmed. Piping general arrangement (GA) drawings can be produced when the process and utility engineering scheme and piping routing drawings are available. ISO drawings can be started to prepare after the pipe support data and the latest PFS/UFS drawings are available. Piping material requisition can be prepared after the confirmation of piping specification and standard. The final MTO (material take off) and tie-in list  are finalized once the ISO drawings are issued. Upon confirmation of order, vendor drawings will be started working and issued for approval. The materials would be manufactured if the drawings are approved.