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Horizontal fillet joints with one face vertical (see Figure 55) are first tacked and then welded with a heavy first pass. When welding in the horizontal position using the circular or V-shape motion, a soft diffused flame is most desirable. The flame for the first pass is directed nearly vertically downward, with fusion to the vertical leg occurring only by heat conduction from the pool. The second pass is much lighter and should be pointed toward the vertical seam but without playing the torch on the vertical face. Fusion with the vertical face is again controlled by conduction.