A major feature of the ASME PCC-2 guidance is the calculation of required thickness , which must account for bending stresses caused by the eccentricity (the offset between the patch and the original shell). Standard Procedures & Specifications
In non-technical terms: Imagine a steel tank with a hole corroded through its wall. Slapping a piece of steel over the hole and welding it haphazardly is illegal and dangerous. An ASME Standard Patched solution requires: asme standard patched
For thick walls (e.g., >1.5 inches) or P-Number 4 materials (Chrome-Moly), the patch must be stress-relieved per ASME VIII. A major feature of the ASME PCC-2 guidance
: The original construction code for most pressure vessels. While it focus on new builds, it sets the baseline for design stress and material requirements that a patch must meet. An ASME Standard Patched solution requires: For thick