The sequence to reuse on the job
- 01Find the arrow-reference-line junction
- 02Identify flag, circle, or both
- 03State whether the mark controls location or extent
- 04Read the elementary weld symbol separately
FOUNDATION · 4–6 MIN · 5 DECISIONS · NO COUNTDOWN
Field Weld and All-Around Symbol Drill
Keep location and extent separate. The flag says where the weld is made; the circle says how far it continues around the joint.
THIS DRILL IS FOR YOU IFI mix up the flag, the circle, and the weld type.
TRAINING PRINTSupplementary symbols
THE DECIDING RULEA flag controls location; a circle controls extent. Neither one names the weld type.
WHERE IT PAYS OFFShop planning · erection · inspection
SUCCESS AFTER THIS ROUNDExplain what each supplementary mark changes—and what it does not.
WHY THIS MISS MATTERS
The weld type is right, but the work location is wrong.
A crew reads the fillet symbol but overlooks the field-weld flag at the arrow junction and plans the operation for the shop.
Leave with a usable decision
- ✓Distinguish field-weld and all-around marks
- ✓Separate supplementary marks from weld type
- ✓Explain the planning impact of each mark
QUICK CLARIFICATIONS
Questions that cause this mistake.
Read these after the drill if the same shortcut keeps appearing.
What does the flag on a welding symbol mean?+
The flag at the arrow-reference-line junction indicates a field weld rather than a shop weld.
Does the all-around circle identify weld type?+
No. It controls weld extent around the joint; the elementary symbol still identifies the weld type.