Inspection of cast valve bodies, pump casings, and wellhead equipment.
– Helps inspectors distinguish real defects from non-relevant magnetic field behaviors. GlobalSpec Available Formats You can obtain these reference materials through the ASTM International official site or authorized distributors in the following formats:
The standard itself acknowledges the inherent subjectivity of visual inspection: "it is impossible to rigidly interpret magnetic particle indications on castings to a set of photographic references; consequently there is a need for close cooperation between the manufacturer and the purchaser." This emphasizes that the standard is a tool for collaboration, not an absolute judge. Astm E125 Reference Photographs Pdf
ASTM standards are copyrighted materials. While ASTM allows "single copies for individual use" in some educational contexts, distributing a free, full-resolution PDF of the reference photographs without a license is copyright infringement. More importantly, low-resolution scans are dangerous . If you cannot distinguish between a Level 2 shrinkage and a Level 3 shrinkage, you might reject a good part (or worse, accept a bad part).
Understanding ASTM E125 Reference Photographs for Nondestructive Testing Inspection of cast valve bodies, pump casings, and
The standard divides magnetic particle indications into five distinct types based on the nature of the discontinuity. Within most of these types, the standard provides varying degrees of severity, typically ranging from Degree 1 (least severe) to Degree 5 (most severe). Type I: Linear Discontinuities
is traditionally organized into several categories based on the nature of the discontinuity. These typically include: Linear Discontinuities: ASTM standards are copyrighted materials
The keyword is searched for because the written text of the standard is useless without the images. The reference photographs are divided into plates , each representing a specific discontinuity type and severity level (e.g., Level 1, Level 2).
| Type | Defect Category | Description | | :--- | :--- | :--- | | | Linear Discontinuities | Includes hot tears and cracks, often appearing as jagged lines. Graded from 1 to 5. | | Type II | Shrinkage | Appears as irregular, patchy indications. Graded from 1 to 5. | | Type III | Inclusions | Feathery or randomly distributed indications, such as slag inclusions. Graded from 1 to 5. |
: Represents progressive increases in the size, length, or density of the flaw.
can result in compliance issues. Correct application involves: Performing the MPI on the casting. Identifying the type of indication.