Non-destructive testing of steel structure welds

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MCC Construction Research Institute (Shanghai) Co., Ltd. is affiliated to China MCC. Our institute specializes in providing steel structure weld inspection and non-destructive testing of steel structure welds.
r br , , Non-destructive testing is to use acoustic, optical, magnetic and electrical characteristics to detect whether there are defects or unevenness in the inspected object without damaging or affecting the performance of the inspected object. It is given A general term for all technical means that use information such as the size, location, nature and quantity of defects to determine the technical status of the inspected object (such as qualified or not, remaining life, etc.).
r br , , Detection methods include: ultrasonic testing, radiographic testing (R), magnetic particle testing, penetrant testing.
r br , , Non-destructive inspection visual inspection scope:
Weld surface defect inspection. Check the welding quality such as cracks on the surface of the weld, incomplete penetration and leakage.
Status check. Check the surface for cracks, peeling, wire scratches, pits, bulges, spots, corrosion and other defects.
Inner cavity inspection. When certain products (such as worm gear pumps, engines, etc.) are put into operation, endoscopic inspection is carried out according to the items specified in the technical requirements.
Assembly inspection. When there is a requirement and need, use the same three-dimensional industrial video endoscope to inspect the assembly quality or after completion of a certain process, check whether the assembly position of each component meets the requirements of the drawing or technical conditions and whether there are assembly defects.
Excess inspection. Check the inner cavity of the product for residual shavings, foreign objects and other excess matter. Characteristics of non-destructive testing: non-destructive mutual capacitance, dynamic stringency, and divergence of test results, etc.
Non-destructive Non-destructive means that while obtaining the test results, no parts will be lost except for rejecting unqualified products. Therefore, the scale of inspection is not limited by the number of parts. Sampling inspection can be carried out, and general inspection can be used when necessary. Therefore, it is more flexible (can be used for general inspection and random inspection) and reliable.
Mutual compatibility
Mutual compatibility refers to the mutual compatibility of inspection methods, that is: the same part can use different inspection methods at the same time or sequentially and the same inspection can be repeated. This is also the benefit of being non-destructive.
Dynamic Dynamic This means that non-destructive testing methods can inspect parts in use and can timely examine the cumulative impact of the product's operation period. Thus, the failure mechanism of the structure can be identified.
Rigor Rigor refers to the rigor of non-destructive testing technology. First of all, non-destructive testing requires special equipment and specially trained inspection personnel to operate in accordance with strict procedures and standards.
Divergence of test results Divergence of test results Different testers may have different test results for the same specimen. Especially during ultrasonic inspection, the same inspection item must be completed by two inspectors. Consultation required.

r br , , MCC Construction Research Institute (Shanghai) Co., Ltd. Housing Quality Inspection Station
China Jingye Engineering Technology Co., Ltd.
Address: No. Guoquan Road, Yangpu District Fortune International Plaza Ginza
House inspection, seismic appraisal, engineering design, general contracting, real estate development
Contact person: Xiao Xiaojing
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