The Spiral Heat Exchanger is a simple design and tailor made as per the applications. Spacer Studs are flash welded in a special stud welding machine on the two long strips that comprise heating surface. The two strips are joined by welding in the centre of a retractable mandrel.
Link - https://adhiam.com/spiral-heat-exchanger/?utm_source=backlink&utm_medium=google&utm_campaign=keee