Final Inspection

Final Inspection

Quality testing for seamless pipe

Quality testing is an essential step in the manufacturing process of Seamless steel pipes and tubes. The detection method consists of all three crucial steps: Ultrasonic Testing, Eddy Current Testing, and Magnetic Flux Leakage Testing. The processes are as follows:

Nondestructive Testing

Nondestructive Testing (NDT) is a safe and reliable method to inspect components in the pipes. This method is cost-effective and requires nearly no disruption to workers or the machinery. NDT evaluates the quality and characteristics of the material without damaging the pipeline itself or affecting the later regular work of the pipe. In other words, after NDT testing, these parts can still be put into practical use. NDT detects any abnormal inner structure or external defects of the material far more efficiently.

The standard inspection methods of NDT are visual testing (VT), ultrasonic testing (UT), radiographic testing (RT), and hydrostatic testing. Global Seamless uses these testing methods to inspect their products to deliver the best quality to their consumers.

Ultrasonic Testing

Ultrasonic Testing is the most reliable way for measuring steel quality inspection and thickness, including measuring dimensions. This method is accurate, nonintrusive, and safe to detect wall thickness contributing to corrosion resistance to the final product.

The Magnetic Flux Leakage Testing

Steel Pipe Magnetic Flux Leakage Testing Technology can be categorized into two forms: Magnetic Particle Inspection Method and Magnetic Field Measurement Method. The manufacturing processes associated with the production of seamless pipes contribute to a spiral variation in the grain properties of the pipe. It introduces seamless pipe noise (SPN) in the data obtained from magnetic flux leakage (MFL) inspection of these pipelines.

Eddy Current Testing

Eddy Current Testing is one of the thickness measurement standards used for nonconductive coatings on conductive-base materials. By inducing a magnetic field, ECT can read the currents to create a picture of the surface, which helps detect any abrasion.

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