The remaining stress will inevitably occur in the welding seam during the forming and welding process, so the remaining stress should be eliminated after the tube blank is formed and welded. Diameter expansion can eliminate the remaining stress, but it is difficult to completely eliminate the remaining stress, and it is impossible to eliminate the remaining stress at the weld toe.
Read moreLook at the manufacturing process of seamless steel pipes, you will know why seamless steel pipes have no seams.
Read moreASTM A53 Gr.B and ASTM A106 Gr.B
Read moreSelection of seamless pipe welding method
Read moreTypical Chemical and Mechanical Properties of ASTM A500 Grade B
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