Watertube and Method of Making and Assembling Same within a Boiler or Heat Exchanger

A one-piece tube for use as a watertube within a watertube boiler or heat exchanger has a free end section that is formed to have an integral, outward-extending circumferential ring, or flange, a spaced distance from an adjacent end face of the tube. This is preferably accomplished by radially expan...

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Bibliographische Detailangaben
Hauptverfasser:	MOORE THOMAS W, BENDER EDWARD A
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION ENGINEERING ELEMENTS AND UNITS FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEATGENERATING MEANS, IN GENERAL GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEAT EXCHANGE IN GENERAL HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS,IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT HEATING JOINTS OR FITTINGS FOR PIPES LIGHTING MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PIPES PUNCHING METAL RANGES SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL TRANSPORTING VENTILATING WEAPONS WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Beschreibung
Zusammenfassung:	A one-piece tube for use as a watertube within a watertube boiler or heat exchanger has a free end section that is formed to have an integral, outward-extending circumferential ring, or flange, a spaced distance from an adjacent end face of the tube. This is preferably accomplished by radially expanding the tube within the free end section and by axially compressing the free end section to cause a portion of the tube to bulge radially outward to from the circumferential ring, or flange. The flange enables the watertube to be readily driven into engagement with a dome, manifold or like casting without the creation of leaks, such as weld leaks. The free end section of the tube that extends from the circumferential ring, or flange, to the adjacent end face of the tube can be formed with a taper such that the diameter of an outer wall of the tube progressively decreases from the circumferential ring, or flange, to the end face. A boiler or heat exchanger having the above described watertube and a method of assembly are also provided.