How can one keep Submerged Arc Welding Flux in place underneath a joint?
While performing Submerged Arc Welding of a groove joint from above, in flatposition, backing flux is needed also at the underside. To keep it in contactwith the surface and to avoid contamination, one can press the flux against theback of the joint by the use of an air inflated hose laying at the bottom of ametal channel full of flux, on top of which the joint is placed. By this methodthe underside of the root pass remains clean and sound so that little grindingis needed before depositing the next bead from the opposite side of the joint.
