Item number symbol
Also called BOM balloon, Part number
A number in a circle or box, with a leader to a fitting, points to the bill of materials on the same sheet, where the size, rating, schedule and material are listed.
Isometric
What the item number symbol means
A number in a circle or box, with a leader to a fitting, points to the bill of materials on the same sheet, where the size, rating, schedule and material are listed.
How it is drawn
Piping isometric, common form
A balloon with a leader line to the component. Weld numbers are shown in a similar way on many projects.
Isometric SVGWhere you see it
Every fitting, flange, valve and gasket on the isometric.
Related symbols
Frequently asked questions
What does the item number symbol look like?
A balloon with a leader line to the component. Weld numbers are shown in a similar way on many projects.
Where is a item number used?
Every fitting, flange, valve and gasket on the isometric.
Every item number on your isometrics, tracked to the test pack.Deskely Testpack builds test packs from the line list and the drawings, records the test in the field and tracks reinstatement to the last spade.
- In production since 2014
- Thousands of daily users
- On MODEC FPSO projects since 2016