Identification columns
- Line number (size-service-sequence-spec-insulation)
- From / To equipment tags
- P&ID number and revision
- Unit / area code
Process / design columns
- Service description and fluid phase
- Operating P / T and design P / T
- Upset and relief case where applicable
- Fluid service category (B31.3) and corrosion allowance
Mechanical columns
- Pipe spec / class and material
- NPS and schedule / wall thickness
- Insulation type, thickness and purpose (heat conservation, personnel, cold)
- Tracing (steam / electric) and tracing class
Test / commissioning columns
- Test medium and test pressure
- Stress analysis required (Y/N) and analysis package number
- Painting system code
- PWHT / NDE level
Use of this content
This page is a decision-support and training reference. It is not a substitute for the governing code, the project specification, or the judgement of a responsible engineer. Always validate against the current edition of the applicable standard before use on live engineering work.