Regarding the groove shape for thick plates
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This time, while bidding for a project at a unit in Shaanxi, I came across a pressure vessel with a wall thickness of 150 mm, made of 15CrMoR material. What kind of welding groove should be designed for such a thick sheet of material? Which welding method is better?
It should be an X-shaped groove, gas shielded welding, narrow-gap welding, or submerged arc welding
Depending on the processing conditions, refer to the standard recommendations: GBT985.1-2008 for recommended grooves in gas welding, shielded metal arc welding, gas shielded welding, and high-energy beam welding; GBT985.2-2008 for recommended grooves in submerged arc welding
A double U shape is better, as it makes it easier to control welding deformation; the specific choice should be determined after considering what welding method will be used
It would be appropriate to use multiple weld passes.
It is clearly stated in GBT985.2-2008 for submerged arc welding!
Double U-shaped or narrow-gap welding can be used! !