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Detailed protocols on how samples should be selected, prepared, and tested.
Detailed requirements regarding frequencies (typically ranging from 1 MHz to 5 MHz for railway steel) and beam angles (straight-beam/normal probes for longitudinal waves and angle-beam probes for transverse waves).
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According to ISO 5948:2018 , this standard is mandatory when:
ISO 5948 establishes uniform testing parameters, ensuring that a railway axle manufactured in one country meets the exact same quality and safety thresholds as one produced elsewhere in the world.
The standard specifies various parameters that directly affect the test's sensitivity and reliability: Acceptance Criteria and Evaluation Tyres
The standard dictates specific limits on the allowable size, quantity, and location of discontinuities. It also establishes the evaluation methods (e.g., the DGS—Distance-Gain-Size—method or the comparison block method) to classify whether a component is accepted or rejected. Key Technical Sections Covered in the Standard
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It aligns localized manufacturing plants with international quality expectations, streamlining export and import compliance. and axles. Detects internal discontinuities
: Uses reference blocks with flat-bottomed holes to set a sensitivity curve for detecting discontinuities.
Inspection is usually executed from the end faces (axial scanning) to scan the entire length, supplemented by scanning from the cylindrical outer surfaces (radial scanning). Acceptance Criteria and Evaluation
Tyres, solid wheels, wheel centers, and axles.
Detects internal discontinuities, voids, or inclusions within the steel core.
ISO 5948 specifies standardized methods, terminology, and requirements related to heat-sealable flexible films and laminates (note: confirm exact scope against the official standard). It establishes test procedures and performance criteria used by manufacturers, laboratories, and purchasers to ensure consistent quality for packaging films intended for heat sealing.