A precision ring mechanism ensures precise tracking of the wire drive system with the precision cut land of the pipe, while the clamping shoes hold the pipe firmly in place.
The root bead is produced utilizing six to eight wire feed systems, depending on the pipe diameter. Welding is carried out in the vertical down position.
Joint-to-joint travel time is 12 to 17 seconds for 24-metre long pipe. Move and set-up time for the Internal Welding Machine varies with operator skills but is generally 1.5 to 2 minutes. This gives a weld-to-weld cycle time of 2.5 to 3.5 minutes. Only one operator is required to apply the internal root bead regardless of diameter.
The clamps are pneumatically powered and controlled by wireless remote control. The copper ring can be removed to utilize as a standard line up clamp.