Warning: Unauthorized redistribution of ASTM standards is copyright infringement. However, you can create your own personal repack legally if you purchase the standard from ASTM International or a reseller (like IHS Markit or Techstreet).
Place your production X-ray film (or digital radiograph) side-by-side with the PDF reference image on a calibrated NDT viewer. Match porosity type:
The ASTM E155 porosity levels PDF repack is more than a file – it is the backbone of reliable casting inspection. A well-organized repack saves time, improves accuracy, and ensures compliance with aerospace, automotive, and defense specifications. astm e155 porosity levels pdf repack
When searching for or creating your repack, prioritize:
Remember: No digital repack replaces training. Always qualify your inspectors to perform visual comparisons to ASTM E155 using authentic reference radiographs or certified digital copies. Remember: No digital repack replaces training
If your repacked PDF has compressed JPEG artifacts or faded grayscale, you will under-call porosity (reject good parts) or over-call porosity (accept bad parts). Ensure your repack maintains 300+ DPI resolution for the radiograph plates.
ASTM E155 distinguishes between fine porosity (small, diffuse voids) and coarse porosity (large, irregular voids). A Level 3 fine porosity might still pass, while a Level 3 coarse porosity would likely fail pressure-retaining components. If your repacked PDF has compressed JPEG artifacts
Critical note: The levels are relative to a master set of radiographs. You do not guess. You place your production radiograph next to (or digitally overlay) the ASTM reference of the same thickness range and match the severity.
Despite being an essential tool, the native digital distribution of ASTM E155 has several flaws:
This is why professionals search for a "repack" – a single, organized, optimized, and complete PDF package.
ASTM_E155_Porosity_Levels_Repack.pdf
├── Cover page (title, revision date, repack version)
├── Introduction to porosity in castings
├── Severity Level 1 – images + acceptance criteria
├── Severity Level 2 – images + acceptance criteria
├── Severity Level 3 – images + acceptance criteria
├── Comparison plate (all three levels at same thickness)
├── Reference table: thickness vs. severity
├── Quick reference card (last page)
└── Disclaimer & copyright notice