For the butt weld elbow, it is stamped into a half-annular elbow by a stamping die of the same material as the pipe material, and then the two half-ring elbows are paired and welded. Due to the different welding standards of various types of pipes, it is usually semi-finished products that are solidified according to the group. The on-site construction is welded according to the pipe weld grade. Therefore, it is also called the two-half welding elbow.
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