Casting Pipe Flange MT and PT Exam Flaw Specimen (Metric Version) Carbon Steel Casting Pipe Flange MT and PT Exam Flaw Specimen Casting Pipe Flange Magnetic Particle and Liquid Penetrant Exam Flawed Specimens. Geometry: 150mm OD x 19mm (T). Flaws: 3, randomly placed Standard Tolerance: +/-4mm. Documentation: NDT Verification Reports, C of C, CAD Drawings and Test Sheets. Material: Carbon Steel. Customized Calibration Test Block and Flaw Specimen also available.