Destructive Examination & Testing

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

11. Mechanical Testing Tension

12. 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.

13. 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.

14. Tensile Testing Strength Graph

24. Bending

32. 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

33. Bend Testing Sample Removal

34. Bend Testing Sample Preparation

35. Face Bend Testing

36. Root Bend Testing

37. Side Bend Testing

38. Longitudinal Face Bend Testing

39. Longitudinal Root Bend Testing

40. Pipe Fillet Bend Testing

41. Impact Testing

43. TEST MACHINE

45. CHARPY

46. IZOD