What are the testing and acceptance methods for welded steel pipe products?

What are the testing and acceptance methods for carbon steel pipe fittings and welded steel pipe products?

1. Appearance inspection
Appearance is mainly to visually observe whether steel pipe products have defects such as scars, rust, dents, cracks, flattening, etc., and whether they meet relevant product appearance standards.

2. Specification and model detection

Use measuring tools such as calipers, meter rulers, micrometers, and thickness gauges to accurately measure pipe diameters, outer diameters, inner diameters, thicknesses, lengths, ovality, and dimensional error range values in accordance with contract specifications, and inspect products and supply requirements or the country of the corresponding product. Are the standard sizes consistent?

3. Material detection
Spectroscopic chemical element analysis can be performed on steel pipeline products, and direct reading spectrometer can also be used for detection. The material is clear at a glance, simple and convenient.

4.Hydraulic pressure test
Conduct a pressure test on pipeline products as required to see if the actual operating pressure can be guaranteed, such as: 10 kg (1MPA steel pipe), 16 kg (16PN flange), and other pressure requirements.

5. Flaw detection
Commonly used flaw detection and inspection methods for steel pipe and fitting products include: ultrasonic testing and X-ray testing, which are also divided into: first-level flaw detection, second-level flaw detection, third-level flaw detection, etc. On-site sampling flaw detection by a third-party testing agency can be carried out according to actual needs.