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Seamless steel pipe detection

Seamless steel pipe for the use of engineering and construction is very widely, it is a hollow steel strip no seams, it is mainly used to transport liquids pipelines, different look and general steel,one of those heavy type steel, it has a strong resistance to corrosion, resistant to general corrosion.


Tubes for Fluid Transportation Service
Seamless pipes by standards
Chemical and petrochemical industry
Seamless pipes by application
Seamless steel pipe detection is mainly shown below:

Size and shape detection
Checking the contents include: wall thickness, diameter, length, bend, ovality, ports and blunt edge slope angle and profiled steel cross-sectional shape.

Chemical performance testing
At room temperature or under a certain temperature mechanical properties test (tensile test, toughness test, hardness test), hydraulic test and corrosion test (intergranular corrosion test, resistance to hydrogen cracking experiment-HIC, sulfide stress cracking test-SSCC).

Surface quality inspection
Human visual inspection and NDT inspection. There are many non-destructive testing methods such as: ultrasonic testing, eddy current testing, magnetic particle testing, magnetic flux leakage detection, electromagnetic ultrasonic testing and penetration testing, etc. Each method has advantages and disadvantages: suitable for detecting steel surface or near-surface: eddy current testing, magnetic particle testing, magnetic flux leakage testing, penetration testing. Where penetration testing is limited to the steel surface defect inspection openings.

Magnetic particle testing, magnetic flux leakage testing, eddy current testing of ferromagnetic materials only limited checks. Eddy current testing is more sensitive to the point-like defects, other crack detection sensitivity. And ultrasonic flaw detection reaction on the surface of the pipe relatively rapid, qualitative analysis of the internal pipe there are still some difficulties, and ultrasound is also limited by the shape of steel and grain size.

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