Stainless steel seamless steel tube processing

Stainless steel seamless pipes with outer diameter less than 65mm or in-process pipes should be stretched first. The size of the head meets the technological requirements, and the length of the head is generally 120-150 mm. The shoulders of the head after the head should be smooth and angular.

Stainless steel seamless steel for perforated barren pipes should be at the end of the head, while in the products, the poor quality of the end of the head is chosen.

The steel pipe with core-pulling diameter must be drilled in the shoulder transition zone. The size of the hole should be based on air permeability. The smaller the hole, the better.

When heating, it should be strict (strictly control temperature), Two-Service (frequent feeding, frequent turning) three-speed (fast heating, fast beating, fast cooling).

Head heating temperature

Heating Temperature Cooling Method

Air-cooled at 1050-1100 C

The stainless steel seamless steel head is heated by inserting into the heating hole, and the insertion depth is about 200 mm. The heating temperature should be red with naked eyes.

Pipe joint/weld head

Subarc welding can be used to weld drawing heads for 65mm barren or in-process steel pipes (see "Technical Regulations for Equipment Operation") in order to reduce the loss of steel pipes.

Select the old or new head suitable for the corresponding specifications and weld them to the end of the barren pipe or in-process pipe.

The welded end should be cut neatly and the edge should be smooth with circular arc. After welding, the weld should be lower than the outside diameter of the pipe in order to prevent contact with the drawing die during drawing, and the strength should be sufficient to avoid breaking.

Whenever the pull is finished, the head is cut off and the welded joint can be used repeatedly.