Double Jointing Equipment
The primary function of the Double Jointer System is to reduce in-the-field production time by having joints pre-welded before they arrive in the field.
In a coordinated yard environment, pipe pairs can be joined into one unit at a much higher rate of speed than in the field. Exactly how much time is saved depends on the crew proficiency. Before pipe is moved into the Line-Up Station, their ends are prepared for welding. ID station welds the ID of the pipe. After the pipe pairs are joined, the double joint is moved onward to the Fill Stations. After additional passes have been applied, non-destructive testing inspects the pipe welds.
After pipes are joined, the double joints are moved outward onto customer storage skids for subsequent inspection, joint coating, and other operations.