For pressure vessel shells, when using surfacing with the same type of steel, is a transition layer required?
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I would like to ask everyone: for the welding of layers made from the same type of steel on a pressure vessel shell, is a transition layer necessary?
Da should be a transition zone with varying thicknesses, and does not belong to corrosion-resistant surfacing； So there is no transition layer.
Since the repair method adopts a type of surfacing technique, the thinking also turned to corrosion-resistant surfacing. This is actually similar to the nature of patch welding or surfacing for thickness transitions. Thank you
When cladding pressure vessel shells with the same steel, a transition layer is generally not required. Cladding with the same type of steel can be carried out directly, as identical steels have similar chemical compositions and mechanical properties, which ensures the strength and sealing quality of the welded joint. However, it should be noted that during the surfacing process, it is necessary to control the welding temperature and welding speed properly in order to avoid an excessively large heat-affected zone, which could lead to quality issues in the welded joint. Additionally, it is necessary to ensure that the geometry and dimensions of the welded joints meet the design requirements, in order to guarantee the safe and reliable operation of the pressure vessel. .