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  Fillet Weld Positions The advantage of the fillet-welded joint is that it’s unnecessary to prepare the edges of the plates or sheets for welding. Double fillet-welded joints are an improvement over single-fillet joints because they can withstand loads from more than one direction. Three of the five basic types of joints –  the lap, the T-joint and the corner joint  – can be joined with fillet welds. Flat Fillet Weld Position – 1F The axis of the flat position fillet weld is either horizontal or inclined not more than 15° to the horizontal. The surfaces of the plates are each inclined at about 45° to the horizontal. The face of the weld is on top. The typical flat-position fillet weld is similar to the flat-position groove weld. The difference is in the positions of the plates forming the joint. Horizontal Fillet Weld Position – 2F In this position, both the axis of the weld and the lower plate of the joint assembly are horizontal. For the  T-joints and inside corne...

  Standards for Welding Positions : It is very important for the Weld Inspector  to know the position , or location of a joint relative to the horizon, because it may determine what welding process, methods, and techniques can be used. Welding is usually easiest when the welder can work on a joint located on a flat, horizontal surface, such as on a table or bench. However, joints in the field may be located in a variety of positions relative to the welder and to the horizon, as shown below.  1)  Welding positions – AWS D1.1, European Welding Standard EN 287 – 1, ASME IX: 2) Welding Positions – Butt, Fillet and Piping Welds: Flat Butt Weld Position – 1G In this position, the axis line of the weld must  not incline more than 15°  from the horizon and the face of the weld must be on top. Welders often refer to the flat-position welding by the nonstandard term  downhand welding. Horizontal Butt Weld Position – 2G In this position, both plates are perpendic...