Current label: Tangshan square tube manufacturer direct sales
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Commonly used square tube size: for example, the commonly used square tube size of seamless square tube with an outer diameter of 50mm, ⑴ It is generally calibrated in millimeters (mm) of the outer diameter D, inner diameter and wall thickness S of the square tube. ⑵ Each type of square tube has regular different sizes, with 29 types of 32-195mm outer diameter. Another example is the nominal diameter of welded square pipe 2