ERW Tube Complexity Calculator

Includes plant policy: No ID scarfing. Outputs are planning guides.

Inputs

Results

D/t
37.5
Complexity Score (1–6)
3.4
Speed Factor vs Mild
0.76×
Total Passes (est.)
12
Pull Bias Recommended
Yes
Anneal Required
Yes
ID Bead Risk (no ID scarf)
Yes
Weld Power Factor (rel.)
1.3
Top Risks
  • Seam split
  • Round-up blocked by ID bead
  • Seam hardness
  • Edge wander (needs tension)
  • Ovality (Medium)
  • Bead interference at ID (no ID scarf)
  • Strip mismatch (Medium)
Formulas locked to plant policy (No ID scarf). OEM envelope checks are conservative; adjust only with engineering approval.