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