What are 1G,2G,3G,4G and 1F,2F,3F,4F weld designations?

The weld designations 1G, 2G, 3G, 4G and 1F, 2F, 3F, 4F refer to specific welding positions for both fillet welds and groove welds. These designations are standardized in welding codes, such as the AWS (American Welding Society) or other relevant standards, to define the orientation of the workpieces during welding. Here’s a breakdown of the positions: