What inherent defects may exist in the raw material of welded pipeMainly include delamination, non-metallic inclusions, segregation, bubbles, gas content, and poor metallographic structure, etc.68 How does stratification come about? What is the impact on the quality of steel pipes?The delamination i

The inspection and acceptance of straight seam steel pipes shall be carried out by the technical supervision department of the supplier. The supplier needs to ensure that the straight seam steel pipe meets the requirements of the corresponding product standards at the time of delivery. The purch