DEUMA distinguish stationary External Clamping Rings Type AB, and rotary Clamping Rings Type ABU. These are employed for diameters, ranging from approx. 400 to 4000 mm and wall thicknesses from 3 to 12 resp. 25 mm.
External clamping rings type ABU are capable of aligning two tank shells to each other, to clamp and to rotate these shells to enable, with the help of a Column & Boom (Manipulator), the joint welding of shells without the necessity of previous tack welding.
DEUMA internal clamping rings are, in the most, employed for thin walled work-pieces (of approx.1,5–12 mm) as well as for oval shapes.



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