Acceptance criteria and quality inspection methods for seamless steel pipes

Date:2023-04-12View:202Tags:Stainless Steel Plate,seamless steel pipes

inspection methods for seamless steel pipes

1. Steel pipe geometry and shape inspection:

① Steel pipe wall thickness inspection: micrometer, ultrasonic thickness gauge, no less than 8 points at both ends and record.
②Steel pipe outer diameter and ovality inspection: calliper gauge, vernier caliper, ring gauge, measure the maximum point and minimum point.
③ Steel pipe length inspection: steel tape, manual, automatic length measurement.
④Steel tube bending inspection: Ruler, level ruler (1m), feeler gauge, and thin line to measure bending degree per meter and full length bending degree.

⑤ Steel pipe end bevel angle and blunt edge inspection: angle ruler, clamping plate.


2. Steel pipe surface quality inspection: 100%
①Manual visual inspection: lighting conditions, standards, experience, signs, steel pipe rotation.inspection methods for seamless steel pipes②Non-destructive testing inspection:a. Ultrasonic flaw detection UT:
It is sensitive to surface and internal crack defects of various materials with uniform materials.
Standard: GB/T 5777-1996 Level: C5
b. Eddy current flaw detection ET: (electromagnetic induction)
Mainly sensitive to point (hole-shaped) defects. Standard: GB/T 7735-2004
Level: B level
c. Magnetic particle MT and magnetic flux leakage testing:
Magnetic flaw detection is suitable for the detection of surface and near-surface defects of ferromagnetic materials.
Standard: GB/T 12606-1999 Level: C4d. Electromagnetic ultrasonic flaw detection:

No coupling medium is required, and it can be applied to high-temperature, high-speed, and rough surface flaw detection of steel pipes.
e. Penetration testing:

Fluorescence, coloring, and detection of steel pipe surface defects.


3. Steel management performance inspection:① Tensile test: measure stress and deformation, determine the strength (YS, TS) and plasticity index (A, Z) of the material                     Longitudinal and transverse sample pipe sections, arc and circular samples (¢10,¢12.5)



Request A Quote?

If you have business needs or inquiries, you can leave a message to us. We'll get back to you as soon as possible.
We use cookies and other tracking technologies to improve your browsing experience on our website, to show you personalized content and targeted ads, to analyze our website traffic, and to understand where our visitors are coming from.