Sampling inspection of seamless carbon steel pipes

Sampling inspection of seamless carbon steel pipes

In order to verify the technical performance of seamless carbon steel pipe), considering the requirements of the standard, it is necessary to carry out technical performance inspection on seamless carbon steel pipe samples.

Process performance inspection mainly includes tensile strength, compressive strength, tensile strength, failure work, etc. Performance index inspection mainly includes extrusion flattening test, flaring test, compression test, wrinkling test, cold drawing test, perforation test, etc. . Such inspection items have certain choices according to the different specifications of CS seamless steel pipes and different application scopes.

Non-destructive testing technology refers to the non-destructive testing of internal and surface defects of carbon steel seamless steel pipes. At present, magnetic flux leakage non-destructive testing, ultrasonic flaw detector, eddy current and fluorescent magnetic particle flaw detection have been widely used in seamless steel pipe enterprises. In recent years, non-destructive testing technology has a particularly large development trend. In recent years, new technologies such as acoustic emission holography, ultrasonic spectrum analysis nondestructive testing, ultrasonic imaging nondestructive testing, and ultrasonic high temperature nondestructive testing have emerged.

The straightness, wall thickness, curvature, and length of seamless steel pipes can be checked with external snap gauges, micrometers, curvature levels, and tape measures on the inspection field.

The enlarged opening diameter, thickness and length can also be continuously inspected by automatic dimension inspection equipment. For OCTG seamless steel pipes, it is also necessary to check the basic parameters of the external thread.

Generally, the internal and external surfaces are inspected by measuring. In addition to measuring, the inner surface can also be inspected by a vertical prism. Some carbon steel pipes with a unique scope of application also require non-destructive testing techniques, including eddy current, magnetic flux leakage, ultrasonic, magnetic particle inspection, etc., to test the internal and external properties of seamless steel pipes.

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