GENERAL

Outside welding at the 12 o'clock position is accomplished from a column mounted platform containing a carriage mounted welding machine and flux feed and recovery system. An operator seat, controls and target light for operation of the outside pipe welding are provided. No mill operating controls are provided at this welding station. Inside welding is accomplished at the 6 o'clock position. An operator seat and main operating control panel for welder and machine function is at this same position.

WELDING MACHINES

The welding system is designed to weld the pipe both inside and outside with submerged arc welding system by single wire welding (DC) as well as double wire welding (Tandem welding / DC-AC).

Inside Welding System

Inside welding is accomplished at the 6 o'clock position where the pipe seam is initially formed. The system consist of the following main components:

For single wire welding (DC)

For double wire welding (Tandem welding I DC-AC)

The welding heads include wire feed motors, wire feed tubes, welding nozzles and welding tips.

The inside welding head system is mounted on the mandrel of the three-roll system. The whole system is equipped with a motorized electrode positioning system. The control boxes are mounted on the main operator panel that is located near the inside welding station.

Outside Welding System

Outside welding is accomplished at the 12 o'clock position following the inside welding. The system consists of the following main components:

For single wire welding (DC)

For double wire welding (Tandem welding I DC-AC)

The welding heads include wire feed motors, wire feed tubes, welding nozzles and welding tips.

The outside welding head and control box are mounted on a column mounted boom. The boom is adjustable up and down on the column and the welding head is adjustable side to side on the boom. Consequently, the welding system position can be easily adjusted according to pipe diameter and helix angle.