ASME VIII-2 Table 7.9 Acceptance Calculator
For weld thicknesses between 13 mm and <25 mm | Fixed wall thickness t = 22 mm
Surface: a/t ≤ 0.087 & l ≤ 6.4 mm
Subsurface: a/t ≤ 0.143 & l ≤ 6.4 mm
Project / Report Information
Settings
S rule used: classification becomes Surface when S ≤ a/2, where
S is separation to nearest surface and a is through dimension / flaw height.
Input Flaws
| ID | Start Pos. (mm) | Length l (mm) | Height a (mm) | Center Depth z from OD (mm) | Auto S (mm) | Class | Region |
|---|
Input guidance: Start position is the flaw start along weld length. End position = start + l.
Center depth z is measured from the OD surface. The calculator determines
top/bottom proximity, computes S, classifies surface/subsurface, and assigns
a region tag OD / ID / mid-wall.
Evaluation
Input flaws
0
Effective flaws
0
Accepted
0
Rejected
0
Effective Flaw Results
| Eff. ID | Constituent flaws | Start | End | l (mm) | a (mm) | S (mm) | Class | Region | a/t | l/t | Status |
|---|
a/t vs l/t Plot
Surface acceptance zone
Subsurface acceptance zone
Accept
Reject
Engineering Notes
Acceptance basis: attached ASME VIII-2 Table 7.9 for 13 mm ≤ t < 25 mm.
Thickness used: 22 mm.
Surface flaw criteria: a/t ≤ 0.087 and l ≤ 6.4 mm.
Subsurface flaw criteria: a/t ≤ 0.143 and l ≤ 6.4 mm.
Surface classification rule: indication treated as surface when S ≤ a/2.
Interaction rule in this calculator: effective flaw merging is based on ligament gap threshold and selected interaction mode. This is an engineering grouping aid and should match the project procedure / client-agreed interpretation.