Jiangsu
Pre-acceptance
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Video of 50 mm
Standard
Video of 100 mm Standard
Video of 150 mm standard
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Jiangsu Valin - Xigang Special Steel Pre-acceptance
MA Nordic, Östersund, Sweden, August 24-25, 2010
Casey Powers, Field Engineer, Magnetic Analysis Corporation
Item 7 of Jiangsu Contract, Signal to Noise
Detect all defects dynamically in 50, 100, and 150 mm standard bar > than 10 db S/N for the UT and > 3:1 S/N for the eddy current rotobar tester. Speed will be the maximum that is safe to run at the MA Nordic plant (not to exceed 60m/min).
Defects on drawing 13C-3784C, 13C-3785C, and 13C-3786C
ü Defect 1: SURFACE NOTCH 0.4mm DEEP X 0.15mm WIDE x 15mm, Eddy Current Tester
ü Defect 1: SURFACE NOTCH 0.4mm DEEP X 0.15mm WIDE x 15mm, Ultrasonic Tester
ü Defect 2: SURFACE NOTCH 0.4mm DEEP X 0.15mm WIDE x 15mm, Eddy Current Tester
ü Defect 2: SURFACE NOTCH 0.4mm DEEP X 0.15mm WIDE x 15mm, Ultrasonic Tester
ü Defect 3: 0.8 mm DIA X 15 mm DEEP DRILLED HOLE
ü Defect 4: 0.8 mm DIA X 15 mm DEEP DRILLED HOLE
ü Defect 5: 0.8 mm DIA X 15 mm DEEP DRILLED HOLE
Item 14 of Jiangsu Contract, Stability of System
ü Deviation of signal to noise ratio after two hours of running ≤ 1 dB. (UT)
ü Deviation of signal to noise ratio after two hours of running ≤ 1 dB. (EC)
ü Deviation of signal to noise ratio after eight hours of running ≤ 1.5 dB. (UT)
ü Deviation of signal to noise ratio after eight hours of running ≤ 1.5 dB. (EC)
Note: No quantitative data was obtained for stability testing at MA
Nordic due to time constraints. However qualitative observations and the
excellent stability exhibited during testing in Mt. Vernon, NY, we fill that
this will not be an issue during the final acceptance.
Item 20 of Jiangsu Contract, Circumferential Sensitivity Difference
ü Difference of circumferential sensitivity ≤ ±2dB under condition of sample testing. Difference of circumferential sensitivity is subject to detection of ¼ D artificial flaw and near surface flaw. (UT Only)
Additional Items: None
Results
All extraneous indication below is a result of welds on the standards or scratches from transport or handling normally seen in standards that have been shipped and used to setup a system. These indications are real and repeatable and should not be considered system noise.
50 mm UT
50 mm EC
100 mm UT
100 mm EC
127 mm UT
127 mm EC
Circumferential Results (100 mm standard)
0 degrees
90 degrees
270 degrees