Hydrostatic extrusion system and method for producing high strength seamless pipes

A method for producing a seamless pipe from a hollow billet, the method comprising:

• placing the hollow billet inside a pressure container, wherein the hollow billet is surrounded by a fluid within the pressure container;
• arranging a movable punch inside the hollow billet, wherein a hydraulic pressure is transferred from the fluid to the movable punch and to the hollow billet simultaneously, along at least a partial length of the hollow billet;
• arranging a fixed mandrel inside a die opening located serial to the pressure container, the fixed mandrel having a diameter larger than an inner diameter of the hollow billet, wherein a gap is formed between the die opening and the fixed mandrel;
• and
• applying the hydraulic pressure to the fluid via an input force from an input punch to move the hollow billet towards the die opening and force the hollow billet material into the gap between the die opening and the fixed mandrel.

A system for producing a seamless pipe from a hollow billet, comprising:

• a pressure container configured to house the hollow billet, wherein the hollow billet is surrounded by a fluid in the pressure container;
• a movable punch arranged to fit inside the hollow billet, wherein a hydraulic pressure is transferred from the fluid to the movable punch and to the hollow billet simultaneously, along at least a partial length of the hollow billet;
• a fixed mandrel having a diameter larger than an inner diameter of the hollow billet;
• and
• a die opening arranged serial to the pressure container, wherein the die opening is configured to house the fixed mandrel, and wherein a gap is formed between the die opening and the fixed mandrel,
• wherein the hydraulic pressure to the fluid is generated by an input force from a pump to move the hollow billet towards the die opening and force the hollow billet material into the gap between the die opening and the fixed mandrel.