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Factors affecting the accuracy and resolution of the industrial oil casing wall thickness detection
API standards stipulate that the inner and outer surfaces of import and export oil casings shall not have folds, separations, cracks, or scars. These defects should be thoroughly removed, and the removal depth should not be less than 12.5% of the nominal wall thickness. Oil casing must be fully...Read more -
What should be done when the cooling of large-diameter steel pipes is completed
(1) When the cooling is completed, that is, when the temperature of the surface and the core is completely the same, the elastic deformation of the surface and the core also disappears and returns to the original state. Although instantaneous thermal stress is generated during the cooling process...Read more -
What details should the industrial thick-walled steel pipes go through before use
The selection of welding methods for thick-walled steel pipes should be based on the material and wall thickness of thick-walled steel pipes. Because different welding methods have different arc heat and arc force, different welding methods have different characteristics. For example, the charact...Read more -
Physical and chemical properties and appearance inspection of high-frequency welded steel pipes
Chemical properties of high-frequency welded steel pipes: Mechanical properties at room temperature, mechanical properties at high temperature, low temperature properties, and corrosion resistance. The physical and chemical properties of high-frequency welded steel pipes mainly depend on the chem...Read more -
Reasons for sand eyes at the weld of spiral seam submerged arc welded steel pipe
Spiral steel pipe is made by bending the strip steel in a spiral direction through a coiling machine and then welding it through a capacitor double-sided submerged arc. In the process of spiral steel pipe welding production, many galvanized channel steel situations such as leaking welding and mis...Read more -
Spiral welded steel pipe weld eddy current non-destructive testing method
Steel pipe transportation, as an efficient special transportation means, has played an increasingly important role in the fields of oil and gas transportation. Domestic large-diameter transportation pipelines are currently mainly constructed with spiral welded steel pipes. In order to ensure the ...Read more