A seamless steel pipe is a type of steel pipe that is manufactured without any welding or joining seams. It is made from a solid round steel billet which is heated and pushed or pulled over a form until the steel is shaped into a hollow tube.

This process results in a pipe with a smooth and uniform surface, free from any weld seams or joints, making it suitable for high-pressure applications and critical industrial processes.

Seamless steel pipes are commonly used in industries such as oil and gas, petrochemical, automotive, and construction due to their strength, durability, and ability to withstand high temperatures and pressures.