May tolerate porosity up to Level 5 or higher .
: Appears as round or elongated dark spots, often minute and distributed throughout the casting.
If you’ve already obtained this “repack,” I strongly advise scanning it for security risks and verifying its contents against an official copy before any professional use.
While tempting, these "repacks" are :
: Typically indicative of structural weakness; usually rejected in all but non-load-bearing cosmetic applications. How Inspectors Use ASTM E155 Reference Radiographs
A typical engineering drawing will specify the allowable defect level using a notation such as:
ASTM E155 categorizes porosity and related defects based on their radiographic appearance: astm e155 porosity levels pdf repack
Use a light box (brightness > 3000 cd/m²). Place your radiograph next to the printed reference from the PDF (printed at true scale). Move through Levels 1 to 5 until the density and distribution match.
: Typically divided into specific thickness ranges, commonly up to 2 inches (50.8 mm).
ASTM E155 has been updated over time (e.g., E155-00, E155-15, E155-20), and a repack might indicate the latest version, including digital reference radiographs (E2422). Importance of Proper Interpretation May tolerate porosity up to Level 5 or higher
A: Yes, if you own the original standard (physical or digital license) and use it internally. Distribution without permission is copyright infringement.
ASTM E155 categorizes internal discontinuities into distinct types. Porosity, which is caused by trapped gas or material shrinkage during cooling, is graded by severity levels ranging from to Level 8 (most severe) . 1. Gas Porosity