A welding issue regarding the bottom support of a slotted elbow
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Regarding the welding of the bottom supports for elbows with seams (elbows that have welds on their back side), our management requires that no welding be carried out at the junction between the support and the elbow’s weld, nor within a range of 2 centimeters on either side of the weld on the back side of the elbow, in order to avoid the formation of cross-welds. It has not been possible to find out whether such a requirement exists in the regulations. I would like to ask: Are there any such regulations in the standards? Or whether it is necessary to do so. See the image below:
According to the welding specifications I am aware of, there are generally no explicit requirements specifying a certain distance that must be left unwelded between welds. However, depending on the specific engineering and design requirements, it is sometimes necessary to avoid creating too many welds or cross-welds in certain areas. This requirement may stem from the following reasons: 1. To avoid heat stress concentration caused by welding, thereby reducing the risk of damage resulting from such stress concentration ； 2. To facilitate weld inspection, avoid situations such as weld overlap and intersection, and ensure weld quality ； 3. To reduce the risks of deformation and instability during the welding process. In the image you provided, the distance between the bottom bracket and the back of the elbow is 2 centimeters; this requirement helps to ensure weld quality, reduce deformation, and improve the stability of the structure. Although there are no specific standards that clearly define such requirements, in actual production and construction, special welding requirements are sometimes imposed based on the project plan and technical specifications, in order to ensure the quality of the products and the safety of the projects. Ultimately, if your management requires it, in order to ensure the quality of the products and the construction work, you can conduct further discussions with the relevant design, process, and construction departments to understand the specific requirements and take appropriate actions. .
It seems that some catalogs require flaw detection for intersecting welds
What specifications are needed for such an installation? It’s the weakest point of the elbow, plus there’s the need for future maintenance and replacement, and it’s also a support – it’s completely nonsensical as a design.
Cross welding is not allowed; the welds must not overlap. It is acceptable to weld these supports in segments rather than continuously