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- A variety of non-destructive examination (NDE) techniques are available for inspecting plastic welds. Many of these techniques are similar to the ones used for inspecting metal welds. Traditional techniques include visual testing, radiography, and various ultrasonic techniques. Advanced ultrasonic techniques such as time of flight diffraction (TOFD) and phased-array ultrasonics (PAUT) are being increasingly studied and used for inspecting plastic pipeline welds. Research in the use of optical coherence tomography (OCT) and microwave reflectrometry has also been conducted. The main purpose of NDE is to detect defects in the weld and the joint fit-up. Examples include joint mismatch, cracks, porosity, voids, inclusions, lack of penetration and lack of fusion (cold joints). However, the lack of defects does not necessarily mean the weld is adequate and thus NDE does not provide a good indication of weld strength, long term performance, or its ability to handle cyclic loading. Although destructive testing gives a better indication of actual joint strength, it's impractical to use on production welds since the sample is destroyed. Hence, the need to use and develop NDE techniques to ensure sound welds are being produced during production welding. (en)
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- 11949 (xsd:nonNegativeInteger)
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- A variety of non-destructive examination (NDE) techniques are available for inspecting plastic welds. Many of these techniques are similar to the ones used for inspecting metal welds. Traditional techniques include visual testing, radiography, and various ultrasonic techniques. Advanced ultrasonic techniques such as time of flight diffraction (TOFD) and phased-array ultrasonics (PAUT) are being increasingly studied and used for inspecting plastic pipeline welds. Research in the use of optical coherence tomography (OCT) and microwave reflectrometry has also been conducted. (en)
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- Plastic weld non-destructive examination (en)
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