{"id":139,"date":"2022-09-03T05:30:00","date_gmt":"2022-09-03T05:30:00","guid":{"rendered":"https:\/\/mewelding.com\/?p=139"},"modified":"2022-09-21T03:20:58","modified_gmt":"2022-09-21T03:20:58","slug":"welding-positions","status":"publish","type":"post","link":"https:\/\/mewelding.com\/welding-positions\/","title":{"rendered":"Welding Positions"},"content":{"rendered":"\n
In this article I have discussed in some detail the subject of welding positions. The entire discussion has been done in reference to the Section IX of ASME Boiler and Pressure Vessel Code (BPVC).<\/p>\n\n\n\n
I have been a welding engineer for more than nine years. One question that has always troubled me about the welding positions is this: In the table QW-461.9, why is it that the Section IX sometimes uses the nomenclature 1G, 2G\u2026 and 1F, 2F\u2026 , while sometimes it uses \u2018flat\u2019, \u2018horizontal\u2019, etc\u2026. for the welding positions. Why can\u2019t it stick to any one system?<\/p>\n\n\n\n
Why would Section IX resort to two different systems? Aren\u2019t 1G and flat position same? Aren\u2019t 2G and horizontal position same? Are 3G and vertical position any different? What about 4G and overhead position?<\/p>\n\n\n\n
Searches on internet do not throw up helpful answers to these questions either.<\/p>\n\n\n\n
Another thing that bothered me for a long time was the figures given in QW-461.1 and QW-461.2. These two diagrams are notoriously difficult to understand. Welding engineers around the world have wrestled with these two figures for a long<\/em> time to extract meaning out of them.<\/p>\n\n\n\n Have you been troubled by these problems too? Read this article to get some relief. Here I have tried to bring some clarity on the subject of welding positions vis-\u00e0-vis ASME Section IX.<\/p>\n\n\n\n It gets missed from the attention at first, until someone else points it out to us. As it says at the top of QW-461.3, through 461.7, these positions are test<\/em><\/strong> positions. That is, we are supposed to use this terminology only when we are making test<\/em> coupons.<\/p>\n\n\n\n It becomes clear on perusing the table QW-461.9 too. The terms 1G, 2G\u2026etc. are used for describing positions in qualification<\/em> test coupon. These terms are therefore referred to as test positions<\/em>.<\/p>\n\n\n\n This also becomes clear on perusal of QW-120.<\/p>\n\n\n\n The standard test positions (1G, 2G, \u2026etc.) for plates are shown below:<\/p>\n\n\n1G, 2G\u2026 – These Are Test<\/u> Positions<\/strong><\/h2>\n\n\n\n