How to keep flanges square when welding in the field
I do a lot of pipe welding on industrial sites where flanges need to stay square to the pipe or the bolt holes will not line up. I have used magnets and clamps but sometimes things shift. I have seen adjustable flange alignment tools online on Amazon, AliExpress, and Alibaba where some are magnetic squares and others are clamping rings with leveling screws. Has anyone here used these tools for field welding? Do they actually hold the flange square while you tack it and is there any DIY jig ideas for odd sized flanges that do not cost much? I weld carbon steel and stainless. Trying to cut down on rework from warped or crooked flanges.