LJ has recently introduced a new and superior system for handling cumbersome fit up of long heavy vessels, tanks and tower sections with the launch of our 40TA (40 Ton capacity) and 60TA (60 Ton capacity) growing line systems.
Pipe or vessel growing lines allow the user to easily fit up circular weld joints on heavy fabricated vessel sections, traditionally done manually using cranes, wedges, and other laborious processes that are cumbersome, slow and potentially dangerous, all through an easy to use control pendant or HMI touch screen system. Larger capacity systems are also available on request.
Step 1: Place the first 2 cans or vessel sections on fit up bed, and rotate one can so that the seam is at 180 degrees from the seam of the other section.
Step 2: Move the fit up carriage to match the cans using the elevation, side/side shift and track drive features. The fit up is done with a single operator using a pendant remote control.
Step 3: The fit up rolls are then used to adjust the gap between the cans. Once the gap is closed and the gaps are fully aligned, then the weld can be tacked.
Step 4: Continue additional fit up around the full circumference of the cans, and place tack welds as required.
Step 5: If making use of LJ's automated open arc root column and boom welding manipulators, move into place and complete the internal ID weld.
Step 6: After the inside root pass is complete, the welding manipulator is then repositioned to do the outside circumference of the cans, typically utilizing the submerged arc process.
Step 7: Next, repeat the fit up and the column and boom manipulator welds as previously completed. You can then "grow the line" until it has reached its maximum length.
Would You Like More Information About The Growing Line Fit Up Bed System? Request a free consultation with one of our product specialists below.