American National Standard – ASTM F2620
Acceptable Visual Appearance
- Melt bead flattened by cold ring.
- No gaps or voids.
- Good alignment between pipe and fitting.
Unacceptable Visual Appearance
- Melt bead not flattened against the fitting/cold ring.
- Improper insertion depth; no cold ring.
- Excessive heating.
- Misalignment.