What is the production process of 45# seamless pipe

The raw material for rolling 45# seamless pipe is round tube billet. The round tube billet is cut by a cutting machine into a billet with a length of about 1 meter, and then sent to the furnace for heating via a conveyor belt.

The billet is fed into the furnace and heated at a temperature of approximately 1200 degrees Celsius. The fuel is hydrogen or acetylene. The temperature control in the furnace is a key issue. After the 45# seamless pipe is out of the furnace, it must be pierced through a pressure punching machine. Generally, the more common piercing machine is the tapered roller piercing machine. This type of piercing machine has high production efficiency, good product quality, large perforation diameter expansion, and can wear a variety of steel types.

After piercing, the 45# seamless pipe billet is successively cross-rolled, continuous rolled or extruded by three rolls. After squeezing, take off the tube and sizing. The sizing machine uses a tapered drill to rotate at a high speed into the steel billet to punch holes to form a steel pipe. The inner diameter of 45# seamless pipe is determined by the length of the outer diameter of the drill bit of the sizing machine. After the 45# seamless pipe is sized, it enters the cooling tower and is cooled by spraying water. After the 45# seamless pipe is cooled, it will be straightened.

After straightening, the 45# seamless pipe is sent to the metal flaw detector (or hydraulic test) by the conveyor belt for internal flaw detection. If there are cracks, bubbles, etc. inside the 45# seamless pipe, it will be detected. After the quality inspection of 45# seamless pipes, strict manual selection is required. After the quality inspection of the 45# seamless pipe, paint the serial number, specification, production batch number, etc. with paint.