How should the red part below be explained? root tack welds
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This post was last edited by niuky on 2010-4-28 at 16:25. The initial root pass of double butt welds, including root tack welds, shall be chipped, ground, and/or gouged to sound metal. The back-chipped welds, welding groove, and plate edges shall be examined to ensure that all cracks, pin holes, porosity, and other defects have been removed prior to commencing welding on the second side. Root tack welds: Back-chipped welds: Plate edges:
Please refer to: http://bbs.hgbbs.net/thread-125954-1-6.html. \"Back chip to sound metal & reweld\" means cleaning the back side until a metallic shine is visible, followed by re-welding. This is a type of welding method known as double-sided welding, where the back side is cleaned and then welded. This approach is used for containers, tanks, steel structures, etc., whenever it’s possible to weld from the back side. For pipes, since it’s not possible to access the inside of the pipe to weld from the back side, the single-sided welding with double-sided shaping method is used. TIG welding is often employed as the base layer for pipes due to its ability to produce good welds with excellent fusion quality.
The initial root pass of double butt welds, including root tack welds, shall be chipped, ground, and/or gouged to sound metal. The back-chipped welds, welding groove, and plate edges shall be examined to ensure that all cracks, pin holes, porosity, and other defects have been removed prior to commencing welding on the second side. Root tack welds: spot welds at the root; Back-chipped welds: welds with the root area cleaned on the back side; Plate edges: the edges of the metal plates
chipped, ground, and/or gouged to sound metal – what do \"ground\" and \"gouge\" mean in this context? Thank you!