Fluid system and method of manufacture via friction welding

A method of manufacturing a fluid system, the method comprising:

• providing a fluid fitting and a fluid element that is attached to at least a portion of the fluid fitting, the fluid fitting comprising:
• a coupling body having an inner surface defining a bore for receiving a pipe therein;
• a ring configured to fit over at least one end of the coupling body for mechanically attaching the coupling body to the pipe;
• and
• a main seal formed on the inner surface of the coupling body for engaging the pipe, wherein when the ring is installed on the at least one end of the coupling body via force, the ring and coupling body apply a compressive force to the main seal sufficient to cause elastic deformation of the ring and permanent deformation of the coupling body and pipe to thereby attach the pipe to the coupling body in a non-leaking manner,
• wherein the step of providing the fluid fitting and the fluid element includes:
• placing a workpiece weld surface of a workpiece in contact with a fluid element weld surface of the fluid element;
• driving one of the workpiece weld surface and the fluid element weld surface in a first predetermined pattern along the other of the workpiece weld surface and the fluid element weld surface;
• applying pressure along a press axis between the workpiece weld surface and the fluid element weld surface so that said driving produces friction and heat for a time sufficient to raise a temperature of the workpiece weld surface and the fluid element weld surface to welding temperature;
• stopping said driving while applying the pressure until the workpiece weld surface and the fluid element weld surface form a welded bond;
• and
• machining the workpiece after the welded bond is formed to form at least the portion of the fluid fitting, such that the fluid element is permanently sealed in a non-leaking manner to the portion of the fluid fitting by the weld joint.