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Welding Position

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  WELDING POSITIONS The easiest position for welding is the flat or downhand position. Any deviation from this  position, other than small deviations in slope makes successful welding much more difficult. This is because gravity does not help in positioning of the weld metal. Positional welding (other than flat) often relies on arc force and surface tension effect; therefore the welding position may affect the mechanical properties of the weld and the likelihood of defects. For simplicity the various welding positions are coded as shown below. BS 499 Welding Positions. PE PD PF PC PG PA PB PA Flat. PB Horizontal vertical. PC Horizontal. PD Horizontal overhead. PE Overhead. PF Vertical up. PG Vertical down.  ASME Welding Positions. rotate rotate 45 °  45 °  45 °   1F 1F 1F rotate 2F 2F 2FR 3F 4F 4F 4F 5F 5F FILLET WELDS    rotate 1G 1G 2G 2G 3G 4G 45 °   5G 6G BUTT WELDS
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