Problems at the junction of the spherical head and the skirt
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I would like to ask what the advantages are of using the connection method shown in the image for spherical heads and skirtings, and whether surface inspection is sufficient for welds of such thickness Can ultrasonic testing be performed on the welds here?
This post was last edited by wanlirn on 2021-11-26 at 16:16. Is this just a makeshift solution to avoid that seam, or is it more reasonable to construct the entire component in accordance with standard requirements?
The one you attached is quite special; I’ve never seen it before
Typical structure of CrMo steel; this structure is commonly seen in hydrogenation reactors
The advantage is that it is less affected by the heat from the inner cylinder, so it is less likely to crack; moreover, a thermal insulation ring can be installed underneath. Previously, there were problems with the lap or butt joint structures of the towers; surfacing is a new type of structure
Limited to high-temperature special material equipment such as hydrogenation reactors
It can only be said that performing ultrasound examinations is not easy, and weld overlay work is also challenging as well
My brother works on reactors; let’s communicate more.
Classmate, with a structure like yours, you can’t even complete an MT task – the space inside the skirt base is far too tight, and the magnetic powder machine is difficult to operate as well as hard to observe. Any issue detected during visual inspection that requires rework is a problem.
GB150.3 Appendix D