English to Russian Tech/Engineering Metallurgy / Casting

Figure PG-31, illustration (d): C = 0.13 for integral flat circular heads when the dimension d does not exceed 24 in. (600 mm); the ratio of thickness of the head to the dimension d is not less than 0.05 nor greater than 0.25; the head thickness th is not less than the shell thick­ ness t 5 , the inside corner radius is not less than 0.25t; and the construction is obtained by special techniques of upsetting and spinning the end of the shell, pipe, or header, such as are employed in closing header ends.