... , logo, type approvals and serial numbers3.5 From bending, welding, rolling: The chime strips are rolled into rounds, tensed ... the top and bottom keg halves by special welding methods.3.8 Circumferential welding of the two keg halves: The keg halves ... welded together to obtain the complete keg on fully automatic circumferential welding machines. Hygienic, smooth, narrow, flat weld seams and perfect ...