Heat transfer apparatus
OwnerRobert B. Cannoninventor
Life of this patent
Estimating the term…
Abstract
An improved header construction for a heat transfer apparatus of the type utilizing a plurality of concentric, longitudinally extending tubes including an inner tube, an intermediate tube and an outer tube with the intermediate tube extending beyond the outer tube and the inner tube extending beyond the intermediate tube. The header includes sealing members for the intermediate and outer tubes. Each sealing member is butt welded at one end to its associated tube. The other end of the sealing members defines a radially inwardly directed sanitary radius which is welded to an outwardly directed sanitary radius formed in a band which, in turn, is welded to the next innermost tube section. The method of assembling a header in accordance with the above is also provided.
Claims4
The method of assembling a header for a heat transfer apparatus having a plurality of longitudinally extending, concentrically mounted heat transfer tubes including an outer tube having a first end, an intermediate tube having a first end extending longitudinally beyond said outer tube first end and an inner tube having a first end extending longitudinally beyond said intermediate tube first end, said method comprising the steps of:
- a. welding a band member about said intermediate tube, said band member extending radially outwardly along a sanitary radius from said intermediate tube to a free end;
- b. cleaning and polishing the band so as to form a smooth continuation of the sanitary radius blending into the intermediate tube;
- c. forming an outer tube sealing member comprising a section of tubing of increasing diameter having a first end with a diameter equal to the diameter of said outermost tube and a second end defined by a radially inwardly directed sanitary radius;
- d. butt welding the first end of said outer tube sealing member to said outer tube first end;
- e. butt welding the second end of said sealing member to said band member free end.
Dependencies are inferred from the claim text.