About:
Design engineering is an area of Instrumentation engineering field which deals with design activities of all the field instruments & equipments, along with all the necessary, related & relevant documentation/deliverables of these instruments/equipments, for all the process oriented industries like Chemical plants, Fertilizer plants, Refineries, Pharmaceutical companies, Food industries, Paper & pulp industry, Water industry, Waste & recycling plants, Steel industries, Cement industries and all the other manufacturing units along with storage & handling facilities too . Design engineering activities clearly focus on the all the primary & essential parameters of designing criteria i.e. Application concept study, design basis study in conjunction with detail engineering activities like safety study, hazard study, sizing & calculations, selection, evaluation and at last, the execution; together all these comprise the design phase of the project.
Design & Detail Engineering Documents/Deliverables:
The below listed documents are the majorly global documents in common prepared in accordance to project execution & requirements. Not all the below listed documents are prepared in each project as it basically governs depending on the nature and scope of the project.
- Piping & instrumentation drawing (P&ID)
- Bill of material (BOM)
- Instrument Index / Instrument list / Instrument BOM
- Instrument datasheets/specification sheets
- Hook-up drawing & BOM
- Cable tray layout & BOM
- Instrument Air consumption list
- Instrument Air header schedule
- Electrical load consumption list
- Cable schedule
- Junction box General Arrangement drawing (GA).
- Junction box (JB) schedule
- Instrument location plan/layout.
- Input/output (I/O) & alarm list.
- System architecture & specifications.
- Control logics & philosophy/narratives
- Panel GA drawing & BOM.
- Panel Wiring drawing
- Panel schedule
- Instruments Loop wiring drawing
- Factory acceptance test (FAT) procedure/report
- Site acceptance test (SAT) procedure/report
Purpose:
All the above listed documents are design stages/activities contributing towards the instrumentation scope of any project. As earlier discussed above, the nature and scope of project decides the requirement & necessity of above listed documents accordingly. The nature & scope of project mainly gets driven by below broadly main classified points:
Nature wise:
- Green field projects i.e. from concept to commissioning.
- Brown field projects like Upgradation, Expansion, integration, etc.
Scope wise:
- Electrical & Instrumentation (E&I) scope i.e. Field instrumentation.
- Control system scope i.e. PLC, DCS, and SCADA part
- Complete scope including both Field Instrumentation & Control system Instrumentation.