It concerns the tolerances and allowances of rings obtained from forged steel plates, calendered and welded (see UNI EU 20, UNI 7272, UNI 4767). The rings can be obtained, at the manufacturer's choice, either from a single piece or from two halves. Material: The material for the rings must be chosen from the steel types of the quality standards of forged products. Table: dimensional tolerances and allowances. Example of calculating the rough forging dimension.
UNI 7732-1978 history
1978UNI 7732-1978 Hot forged finished steel products. Forged rolled and welded rings. Tolerances and machining allowances.