Sound Welding Process and Procedures GAS METAL ARC (“MIG”) WELDING Where the drawing specifies welding all around a joint, the weld size should meet minimum drawing requirements all around the joint. These are simple go-no go gauges that can be purchased from you local welding supplier, or they can be machined from heavy sheet metal for specific sizes. Weld spatter should be removed particularly if the surface being welded will be restored by painting or coating.įillet welds sizes should be verified using a fillet weld gauge. Similarly, it takes more time to make over-sized welds – and this costs money.Ĭompleted welds should be visually examined and exhibit no gaps, voids, cracks, undercut, porosity or arc strikes they should be reasonably smooth and uniform. While there is no maximum fillet size, but over-sized welds do not make the weld perform better. The numbers in parentheses are the nearest larger fraction of the required weld size and match standard fillet gauge sizes. These fillet weld sizes are suitable for tee and angle joints where the tube end is coped to match the outside diameter of the mating tube or where the tube end is flattened so that contouring is not needed. When tubes of different wall thicknesses are joined, the minimum fillet weld size can be based on the thinner of the members. For the convenience of the designer, the following weld sizes will provide welds that have a throat dimension that is at least equal to the thickness of the tube being joined. When the joint design is a tee, corner or fillet weld, the size and length required should be shown on the drawing. When tubes are butt welded (i.e., joined end-to-end), the weld should penetrate through the full tube wall thickness and reinforcement should not exceed 3/32 inches (2.5 mm). Tubular steel should be welded so as to develop the adequate strength at all connections between tubes accordingly, the required weld configuration and size should be specified on the drawings by the designer. Use sound welding practices and procedures.Welding Allied’s galvanized steel tubing is a very achievable operation if three key points are observed to assure consistent quality results.
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