Tank Structures: Turn the Fillet or Move the Torch
Tank assemblies carry two seam families: long seams are a heat-input problem, stiffener fillets an access problem. They are not solved alike.
Rail, Positioner, or Both: Large Structure Welding
A rail answers reach and a positioner answers attitude. Deciding which a large structure needs starts with the seam list, not with the equipment catalogue.
Intersecting Pipe Joints: Fit-Up Decides the Weld
On branch-to-header joints the limiting factor is rarely reach. Hole position, bevel and assembly gap decide whether the seam can be welded in one pass.