Well Control
What this tool does
Straight-tube internal design pressure from wall, mill tolerance, and allowable stress. This page says what the tool is for, in plain language. The working formula stays on the signed-in tool.
When to use it
Open Instrument tubing design pressure when this is the job: Straight-tube internal design pressure from wall, mill tolerance, and allowable stress. That is usually a hydrostatic or kill-weight check from true vertical depth.
Step-by-step
- Open Instrument tubing design pressure from the tool list.
- Fill Units, Outside diameter, Nominal wall, Mill tolerance from the instrument, the drawing, or the job record. Use the unit shown beside each field.
- Fill the remaining fields the same way. Skip a field only when the screen marks it optional.
- Run Calculate when that control is on the page, then read every result row and any warning.
- Check the result against the site procedure and the manufacturer data before you change a range, a wire, a setpoint, or a weight.
- This help page is public. Opening the tool still requires a Pro session.
Inputs
- Units
- Imperial or metric. Pick one and enter every other field in that system.
- Outside diameter
- Outside diameter is the value you read from the instrument, the drawing, or the job record. Enter it in in.
- Nominal wall
- Nominal wall is the value you read from the instrument, the drawing, or the job record. Enter it in in.
- Mill tolerance
- Mill tolerance is the value you read from the instrument, the drawing, or the job record. Enter it in %.
- Corrosion allowance
- Corrosion allowance is the value you read from the instrument, the drawing, or the job record. Enter it in in.
- Allowable stress S
- Allowable stress S is the value you read from the instrument, the drawing, or the job record. Enter it in psi.
- Quality factor E
- Quality factor E is the value you read from the instrument, the drawing, or the job record.
- Weld factor W
- Weld factor W is the value you read from the instrument, the drawing, or the job record.
- Y coefficient
- Y coefficient is the value you read from the instrument, the drawing, or the job record.
Results
- Result
- The reported value for Instrument tubing design pressure. Use the unit printed on that row.
- Warnings
- A warning means an entry is incomplete or outside what this tool will stand behind. Recheck the inputs and the site procedure.
Common mistakes
- Using measured depth where the tool wants true vertical depth.
- Leaving a required safety margin off, or adding the same margin twice.
- Do not treat a result from Instrument tubing design pressure as a substitute for the site procedure or the manufacturer data.
Standards references
These are the standards and public references named on this tool. Clause numbers appear only when the catalog already cites them.
- ASME B31.3 paragraph 304.1.2, internal pressure design thickness
- ASME B31.3 Table 304.1.1 coefficient Y
- ASME B31.3 Table A-1 basic allowable stress (entered, not assumed)
Offline and access
This engine can run offline after the server has cached it for the signed-in account.
A free session can read this help page. The tool card shows the name and the short summary. Opening the tool requires Pro.