FIELD: process engineering.
SUBSTANCE: in compliance with proposed invention, prior to welding, a split metal ring is placed on the bellows tapered layer surface, the ring width making at least total width of series weld seam and its allowance length, while its thickness exceeds that of the said tapered layer by 1.5 times, not more. Layers are welded together with aforesaid split ring to produce welded seam with allowance to be cut off thereafter. Bellow layers and split ring are made in stainless steel of grade 12X18H10T.
EFFECT: using split ring in welding multi-layer pack to eliminate burn-through of tapered layer.
4 cl, 1 dwg, 1 ex
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