Basic Design and Detailed Engineering

Basic Design

The first step in making a preliminary plant design for establishing a detailed commercial plant design is to work out a process design. Process system design is a fundamental of the plant design.

As process design is usually handled by chemical engineers, one might thing that process design is basically concerned with chemical engineering. However, process design cannot be accomplished merely by chemical engineering knowledge, but only in cooperation with other engineering knowledge.

At early stage of Basing Engineering, the Plant Specification should be decided such as: Site condition, Plant scheme (capacity), codes and standards, Feedstock specification, product specification, battery limit condition and utilities… Based on these conditions, process design is formulated and accomplished of the Kinetics of all types of reactions and individual unit operations such as drying, distillation, separation, absorption and so on.

These process designs are integrated and illustrated in Piping and Instrument Flow Diagram (P&ID) which is a fundamental of the detailed engineering, project implementation, construction and operation.

As for equipment, basic design is integrated in the equipment specification sheet. Making of a Plot Plan which indicates the location of each unit is one of the important job in the basic engineering stage.

All basic design worked out in this phase are used as the basis for carrying out the succeeding phases of detailed engineering.

Detailed Engineering
All the design details are worked out in this phase including

- Civil and Building design
- Tower/Vessel./Exchanger Design
- Planning and piping Design
- Heater Design

- Instrument Design
- Electrical Design
- Rotating Design

- Insulation Design

-Transportation Planning

- Construction Planning

Each Design Engineer assigned in each department for the project is responsible for preparation of specifications and drawings, technical requisitions and bid evaluation.

Equipment Engineering drawings and Manufacturing Drawings are required to manufacture and assemble the parts to produce an operable piece of equipment.

Piping drawings, which represent piping layouts for architectural plans and plant layouts, are also needed not only for the procurement of piping materials but for the construction of the final plant.

Details of Instrument/Civil/Electrical design are also worked out on the drawings for the construction in this detailed engineering stage.

Requirement for transportation, construction, plant operation and maintenance shall, naturally, be incorporated in the detailed engineering design.

The detailed design however, could not be completed without the feedback from various specialists who interface in the matrix network organization. Furthermore, it is sometimes required to have discussions with manufacturers, and if necessary, to change the design in accordance with the information from manufacturers, as well as from Licensors and subcontractors.

Since the execution of detailed design is a complex group effort, a project engineer has to grasp the overall process design, and control and manage the Total System Engineering which is a lubricating oil for a smoothly functioning project.