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Welding Forged Weld Neck Flange

1. The butt welding flange shall be subject to ultrasonic flaw detection without layering defects;
2. It shall be cut into strips along the rolling direction of the steel, bent and butt welded into a ring, and the surface of the steel shall form a cylindrical surface of the ring. It is not allowed to directly machine the steel plate into a neck butt welding flange;

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