A twelve-foot diameter 304 stainless steel thick wall duct expansion joint produced by Piping Technology & Products, Inc. is shown supported and braced ready for shipment. Special equipment had rolled the knuckles from ¼” material which is then circumferentially welded. This results in an expansion joint with the minimum stresses possibly exerted and, at the high point of the convolution, its most vulnerable area.
Twelve Foot Diameter 304 Stainless Steel Thick-Wall Duct Expansion Joint
June 29, 1994