The difference between multilayer welding and multi-layer multi pass welding?

1, multi pass welding: more than two welding passes to complete the welding of the whole weld. Multilayer welding: deposited more than two welding layers to complete the welding of the whole weld. Multi-layer welding includes multi-layer single pass welding and multi-layer multi-pass welding, a layer of weld can be composed of a number of beads, if the groove angle is small, deposited one can be a layer, groove angle is large, deposited two or more beads to form a layer of weld, that is, multi-pass welding. 2. Advantages of multi-layer welding: The advantage of multi-layer welding is that it can weld large thick-walled structure. Compared with single-layer welding in the same situation, it can also reduce heat input, reduce deformation and reduce the probability of defects.铜焊丝,Copper Welding Rods,铝焊丝,aluminium welding wire,镍焊条,Nickel electrode,药皮焊条,Flux Coated Brazing Welding Rods