Inspection Standards for Seamless Steel Pipes

Inspection of geometric dimensions and shape of seamless steel pipes

1. Steel pipe wall thickness inspection: micrometer, ultrasonic thickness gauge, no less than 8 points on both ends and record.
2. Inspection of the outer diameter and ellipticity of the steel pipe: caliper gauge, vernier caliper ring gauge, and the maximum and minimum points are measured.
3. Steel tube length check: steel tape measure, manual and automatic length measurement.
4. Checking the bend of steel pipe: ruler, horizontal ruler (1m), ruler and thin line measure the bend of every meter and bend of every meter.
5. Check the angle and blunt edge of the end face of the steel pipe: square ruler, card board.

Steel pipe surface quality inspection:
1. Artificial visual inspection: lighting conditions, standards, experience, logo, steel pipe rotation.
2. Non-destructive flaw detection: ultrasonic flaw detection UT, eddy current flaw detection ET, magnetic particle MT and magnetic flux leakage flaw detection, electromagnetic ultrasonic flaw detection, penetration flaw detection.

Extended information:
Special-shaped seamless steel pipes play a vital role in urban construction. Its quality directly affects the solidity and quality of living buildings. Inferior special-shaped seamless steel tubes have the following characteristics:
1. Whether the surface is smooth
Due to the raw materials used, poor steel rolling equipment, unprofessional technical methods, and low cost, inferior shaped seamless steel pipes will have surface folding, pitting, scarring, cracks, and easy scratches.Generally, this situation can be passed Visual inspection revealed.


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Posted in Honed Tubes.