Could you please tell me, teachers, are the welded joints above class C or class C?
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As shown in the title, is the welded joint above type C or D, that is, the weld connecting the drain tank and the cylinder?
I can’t see what it is, and I can’t determine the type of weld. It should be a Class C weld
It is a semicircular water tank made of rolled steel plates welded under the cylinder.
We often make heat network heaters, but this is the first time I have seen such a drain box. We all make drain wells, using DN800 or DN900 round openings with a length of more than 1,000.； What you do is make a rectangular hole and press Category C. . . This thing is under supervisory inspection. I don’t know how you calculate openings and reinforcements.
It is indeed a heat network heater. I don’t know much about the specific design. I personally feel that it is a Class D weld.
Welded joints have nothing to do with materials and pressure, right?
Fillet weld between semicircular water tank and shell, Class D joint. Whether it is Category C or D, it has no impact on manufacturing requirements.
Category a welds refer to the longitudinal butt welds of the pressure-bearing part of the vessel (except for the longitudinal seams of the laminates in multi-layer wrapped vessels). In addition, they also include all spliced welds of various convex heads, the circumferential welds connecting the spherical head and the cylinder, and the butt welds of the embedded nozzle (referring to the forging of the nozzle part) and the simplified body or head. Class b welds refer to the circumferential butt welds of the pressure-bearing part of the vessel and the butt welds connecting the small end of the tapered head and the pipe (except for some welds that can be clearly specified as classes a, c, and d). Class C welds are the welds connecting the pressure components of the vessel (such as flanges, flat heads, tube sheets, etc.) to the shell or to the pipe, the overlap fillet welds between the inner head and the cylinder, and the longitudinal welds of multi-layer wrapped container laminates. Class d welds refer to the welds connecting pipes, manholes, flanges and other components to the shell. The connection between these plug-in pressure components and the shell is generally a fillet weld (except for welds that have been specified as Class A and B){:9001:}
Class D welds are cross welds between the nozzle and the container