Threaded joint symbol
Also called Screwed joint
A single short line across the pipe marks a threaded (screwed) joint.
What the threaded joint symbol means
A single short line across the pipe marks a threaded (screwed) joint.
How it is drawn
Where you see it
Small-bore lines, instrument connections, vents and drains, and utility services where threaded joints are allowed.
What is written next to it
On the isometric, the threaded joint usually carries the thread type in the bill of materials.
What gets checked on site
For a threaded joint, the site checks usually cover thread engagement and sealant, and leak checks during the pressure test. Each check is recorded against the line and the joint, so the line can go into its test pack and be handed over with its evidence. See the ITR guide.
Related symbols
Frequently asked questions
What does the threaded joint symbol look like?
One short line across the pipe.
Where is a threaded joint used?
Small-bore lines, instrument connections, vents and drains, and utility services where threaded joints are allowed.
- In production since 2014
- Thousands of daily users
- On MODEC FPSO projects since 2016