Coated tube and fitting assembly

Details Coated tube and fitting assembly Coated tube and fitting assembly

1997-05-15

2000-02-22

Hughes, S. Thomas

Metal working

Method of mechanical manufacture

Assembling or joining

29523, B21D 3900

Patent

active

060265558

ABSTRACT:
In a method for securing an end fitting to a coated tube, a tube having a standard outer diameter is coated with a non-corrosive material. The coated tube is then held in a clamp while an outer end of the tube is inserted into the opening of a reduction punch. The reduction punch is then forced axially towards the tube, reducing the outer diameter of the tube and coating to approximately the original outer diameter of the uncoated tube. As a result, a standard end fitting having an inner diameter generally equal to the uncoated tube outer diameter can be utilized on the reduced end of the coated tube. The end fitting is then secured to the reduced end of the coated tube in a known manner, such as by flaring.

REFERENCES:
patent: 2011452 (1935-06-01), Lutz
patent: 3318340 (1967-05-01), Torti
patent: 3461523 (1969-08-01), Peehs et al.
patent: 4125924 (1978-11-01), Goetze
patent: 4359812 (1982-11-01), Haag et al.
patent: 4598937 (1986-07-01), Sugao
patent: 4784311 (1988-11-01), Sugao
patent: 5489127 (1996-02-01), Anglin
patent: 5749138 (1998-05-01), Usui et al.

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