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Destructive Examination & Testing

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  1. Destructive Examination & Testing

  2. Destructive Examination • Destructive Examination renders the weld or material unfit for further service.

  3. Common methods used in Destructive Examination • Bend testing • Tensile testing • Impact testing • Hardness testing • Chemical analysis & Metallography • Hydrostatic testing to destruction

  4. Mechanical Testing Tension

  5. Tensile Strength Testing • “Tensile” is a test in which a prepared sample is pulled until the sample breaks. • Test Measurements are recorded in PSI (Pounds per Square Inch) E7018 = 70,000 PSI Tensile • Test samples called “Tensile Bolts” can reveal a welds Tensile strength, Elastic limit, Yield point, and Ductility.

  6. Tensile Strength Testing • The Elastic Limit of metal is the stress (load) it can withstand and still return to the original length after the load is released. • Yield Strength occurs when the test sample stretches however will not return to its original length. • Ductility is the ability of a metal to stretch or elongate before it breaks.

  7. Tensile Testing Strength Graph

  8. Bending

  9. Bend Testing • Bend test samples are referred to as “Test Coupons” • The most common bend tests are • Guided face and root bend testing • Guided side bend testing • Longitudinal root and side bend testing • Fillet weld bend testing • Unguided bend testing

  10. Bend Testing Sample Removal

  11. Bend Testing Sample Preparation

  12. Face Bend Testing

  13. Root Bend Testing

  14. Side Bend Testing

  15. Longitudinal Face Bend Testing

  16. Longitudinal Root Bend Testing

  17. Pipe Fillet Bend Testing

  18. Impact Testing

  19. TEST MACHINE

  20. CHARPY

  21. IZOD