Specifications: diameter: 320 to 127 mm thickness: 0.4 to 12.7 mm Length: 6 m above, and, in accordance with customer demand, supply and other specifications of steel pipe

Seamless steel pipe compactness and surface roughness inspec


Seamless steel pipe compactness and surface roughness inspection standards
Specified in the contract according to the buyer's request, by both sides, and cold stress relief annealing (blocks), annealing, normalizing state (character set) (No.) state delivery tube compaction tests. The detection compaction should be consistent with the level of GB / t7735acceptance provisions of an eddy current testing.
Surface roughness
When the buyer of steel pipe surface roughness requirements should be specified in the contract. Surface roughness parameters, according to the the GB / ton 1031provisions outline of the arithmetic average deviation of the measurement, the surface roughness value and the measured value of the sample length, on both sides.
Seamless steel pipe
There are many kinds of straight seam welded pipe quality detection method
The physical method is the most commonly used method of physical test, measurement or test methods to take advantage of some of the physical phenomena. Detection of internal defects in material or workpiece, usually used in non-destructive testing methods. Non-destructive testing magnetic flaw detection, ultrasonic flaw detection, ray detection, penetration.
Magnaflux only found magnetic metal surface and near-surface defects, but it can only do quantitative analysis of defects, the nature and depth of the defects can only be estimated based on experience. Magnetic particle testing leakage magnetic field generated by the magnetization of ferromagnetic metal parts using magnetic fields found defects. , Can be divided depending on the method of measuring the magnetic leakage of the magnetic powder, the magnetic flux density and magnetic recording method, in which the method of the magnetic powder is the most widely used.
Penetrant inspection
Penetration testing is the use of some of the liquid permeability and other physical properties of the discovery and display defects, including color detection and fluorescence detection can be used for the detection of ferromagnetic and ferromagnetic material surface defects. 

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