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Wall Thickness Tolerance
The permissible variation in wall thickness from the specified nominal value, typically expressed as a percentage. Tighter tolerances indicate higher quality and precision manufacturing.
Wall Thickness Tolerances
Wall thickness tolerance is critical for pressure calculations, weight control, and interchangeability. Standards specify both plus and minus tolerances.
Typical Tolerances
- ASTM A312: +20%/-12.5% (standard)
- Close tolerance: +15%/-10%
- Precision tubes: ±10% or tighter
- Cold drawn: As tight as ±5%