Welding of the circumferential welds of small-diameter composite steel plate vessels
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For a Φ700x(3+20) S31603+Q345R composite plate vessel, due to its small diameter, the ring weld of the head can only be welded on one side. Is it feasible to use cladding welding material for the root pass, and then transition layer welding material to complete the subsequent welding steps?
Some people say that using transition layer welding materials throughout is not appropriate, considering the requirements for corrosion resistance; I personally think so Also, using nickel-based welding materials seems too costly, which is a concern.
I’m a bit worried; if welding is done first using multi-layer welding materials and then using transition layer welding materials, will this affect the corrosion resistance of the multi-layer structure?
I’ve tried for ages, but I can’t get the detailed view to appear :( It refers to butt welding of circumferential welds, with a single-sided external groove in V shape.
Due to its small diameter, the ends of the cylinder are connected by end caps, making it impossible to perform internal welding of the circumferential welds; therefore, welding can only be carried out from the outside in a single-pass double-sided fashion.