
ASTM Standard Seamless Pipe Quality Inspection:
ASTM standards are widely used in seamless pipe, like the astm a106, astm a53.
Mechanical properties tests (tensile test, ductility test, hardness test), hydraulic test and corrosion test (intergranular corrosion test, hydrogen cracking resistance test -HIC, sulfur sulfide stress cracking test -SSCC) at room temperature or at a certain temperature.
Artificial eye examination and non-destructive examination. There are many nondestructive testing methods, such as: ultrasonic flaw detection, eddy current testing, magnetic particle inspection, magnetic flux leakage testing, electromagnetic ultrasonic flaw detection and penetration testing. Each method has its advantages and disadvantages. Suitable for testing steel surface or near surface: eddy current testing, magnetic particle testing, magnetic flux leakage testing, penetrant inspection. The penetrant inspection is limited to the inspection of the open defects on the surface of the steel pipe; magnetic particle inspection, magnetic flux leakage testing, eddy current testing is limited to ferromagnetic materials inspection. Eddy current flaw detection is more sensitive to point defects, other flaws sensitive to cracks. However, the ultrasonic flaw detection has a relatively rapid response to the test of the surface of the steel pipe. There are still some difficulties in the qualitative analysis of the steel pipe, and the ultrasonic inspection is also limited by the shape and grain size of the steel pipe.
Including low magnification and high magnification inspection.
Including flattening test, ring pull test, flaring and curling test, bending test.