The relationship between the process design package, the basic engineering design, and the detailed engineering design

The process design package is primarily used for calculations; the basic design is often not detailed or thorough enough. After reviewing the basic design, numerous modifications are made before moving on to the detailed design.

Moving from theoretical calculations to practical engineering implementation in this order, a process design package is not necessary for engineering projects.

The Process Package (PDP) is the technical documentation provided by the technology provider; it serves as the basic design material. Subsequently, the specific design agency carries out detailed design based on this Process Package, producing PID diagrams, construction drawings, and overseeing the on-site construction.

The process package provides the engineering company with a basis for engineering design and a foundation for technical assurance. It includes, but is not limited to, process flow diagrams (PFDs), process control diagrams (PCDs), process descriptions, lists of process equipment, design data, and preliminary layout drawings. Process design involves converting the manufacturer’s documents into engineering company documents that can be used by relevant specialists for engineering design, and these documents are also made available for user review; they include, but are not limited to, process flow diagrams (PFDs), process control diagrams (PCDs), process descriptions, material balance sheets, lists of process equipment, process data sheets, safety memorandums, preliminary layout drawings, and various technical specifications. The preliminary design phase provides all the necessary information for carrying out detailed design, as well as purchase requests for equipment and materials; it includes, but is not limited to, piping and instrumentation diagrams (PIDs), sketches for equipment calculation and analysis, design specification sheets, material selection criteria, purchase requests, equipment layout diagrams (by zone), piping layout diagrams (by zone), underground pipeline networks, and electrical single-line diagrams. Detailed design involves providing all the detailed drawings and documents required for construction, which serve as a basis for construction work and for placing additional orders for materials; it includes, but is not limited to, detailed piping diagrams, pipe section diagrams (single-line diagrams), foundation diagrams, structural diagrams, instrumentation design diagrams, electrical design diagrams, equipment manufacturing diagrams, and all other drawings and documents needed for construction.

A process package is a detailed description of the process operations; it is generally provided by the owner of the process technology, or prepared by the design firm based on the technical parameters and data supplied by that owner. The contents include: --Material data, reaction data --Block flow diagrams --Process flow diagrams --Process descriptions --Utilities and “three wastes” --General layout (sketch) --Preliminary PID diagrams --Equipment layout drawings (sketches) --Classification of explosion-proof areas --List of mechanical equipment --Specifications (including basic information for detailed design of mechanical equipment) --Specifications for product and utility piping --Preliminary building design --Building design drafts --Concepts and sketches for drainage systems and traffic facilities --Basic instrumentation design (without process data) --Power supply draft --Specifications for mechanical equipment (with detailed information for quotation purposes) --3D models (computer-based) --Piping single-line sketches --Piping layout drawings, pipe rack layout drawings (including cross-sections) --Sketches for piping calculations --Expanded basic instrumentation design --List of electrical users --Electrical and instrumentation specifications (data sheets). Based on the process package, the design unit can carry out basic engineering design work, which should be completed in accordance with the requirements set out in the “Regulations on the Content of Basic Engineering Design for Petrochemical Plants” ； After the review of the basic design is completed, detailed engineering design work proceeds, to be carried out in accordance with the requirements outlined in the \"Regulations on Detailed Specifications for Petrochemical Plants\".

A process package is a detailed description of the process operations; it is generally provided by the owner of the process technology, or prepared by the design firm based on the technical parameters and data supplied by that owner. The contents include: --Material data, reaction data --Block flow diagrams --Process flow diagrams --Process descriptions --Utilities and “three wastes” --General layout (sketch) --Preliminary PID diagrams --Equipment layout drawings (sketches) --Classification of explosion-proof areas --List of mechanical equipment --Specifications (including basic information for detailed design of mechanical equipment) --Specifications for product and utility piping --Preliminary building design --Building design drafts --Concepts and sketches for drainage systems and traffic facilities --Basic instrumentation design (without process data) --Power supply draft --Specifications for mechanical equipment (with detailed information for quotation purposes) --3D models (computer-based) --Piping single-line sketches --Piping layout drawings, pipe rack layout drawings (including cross-sections) --Sketches for piping calculations --Expanded basic instrumentation design --List of electrical users --Electrical and instrumentation specifications (data sheets). Based on the process package, the design unit can carry out basic engineering design work, which should be completed in accordance with the requirements set out in the “Regulations on the Content of Basic Engineering Design for Petrochemical Plants” ； After the review of the basic design is completed, detailed engineering design work proceeds, to be carried out in accordance with the requirements outlined in the \"Regulations on Detailed Specifications for Petrochemical Plants\".

The technology provider is the company from which you purchased the process package – companies such as Axens or DuPont. In China, for smaller plants, the company that provides the process package (the technology provider) is often the same as the design institute

Thank you to Haiyou for asking the question, and even more thanks to the expert for the explanation :victory:

Such a division makes no sense. The process package cannot be held by one or multiple parties depending on its size.