An Improved Method of Uniting Flanges to Pipes or Tubes.
Year: 1899

page_text: Date of Application, 7th June, 1899-Accepted, 15th July, 1899
COMPLETE SPECIFICATION.
An Improved Method of Uniting Flanges to Pipes or Tubes.
I, FRIEDRICH WILHELM BARTHELS, of 31, Norderelbstrasse, Hamburg, in the
Empire of Germany, Coppersmith, do hereby declare the nature of this invention
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
This invention relates to improvements in the method of uniting flanges to
tubes or pipes.
Hitherto the usual method adopted for securing flanges to tubes especially in
connection with copper tubes for steam pipes consisted in introducing the tube
into the opening of the annular flange and then applying clay to the rear of the
flange to hold a sufficient amount of hard solder. By means of heat the hard
solder is melted to connect the tube with its flange. Great care has to be taken
that the molten solder does not melt away the metal of either the flange or tube
or cause a gutter to be formed through which the metal runs off with the result that
the pipe is damaged.
A great disadvantage however is inherent in the old method even when the
greatest care is used in carrying it out, and this disadvantage is owing to the
fact that the solder affects the metal of the tube and thereby leaves a weakened
place in the tube near the flange which may readily lead to the tube fracturing.
My improved method obviates the weakening of the tube, yet the connection
between it and the flange is a more intimate one.
In order that the invention may be clearly understood and readily carried into
practice I will describe the same with reference to the accompanying drawings, in
which:
Figure 1 is a section taken on the line A B of Figure 3.
Figure 2 is a part plan of a tube and flange.
Figure 3 is a longitudinal section of the same showing the connection of the
The flange a is formed with an extension or collar b at the rear of the flange
which is provided with an internal circular groove c and a number of longitudinal
grooves d.
The tube e is introduced into the flange and spun or hammered into the circular
groove c thereby fixing it to some extent.
Clay is then applied to the rear of the flange and the grooves d are then filled
with hard solder f and the flange with the solder heated from the front.
Thus no weakening whatever of the tube takes place as after the cooling the
Hange, solder and tube form a uniform structure owing to the intimate com-
bination of the parts within the inner circle of the flange.
The grooves are so distributed as to leave enough material, in form of pro-
jections g in the flange, to prevent the molten solder from damaging them. Thus
the tube is firmly secured by being first hammered or spun into the circular
groove c and then by brazing the solder in the groove forming intervals in regular
order around the said circular groove, this last arrangement being considered a
Land
The flange a is formed with an extension or collar bat the rear of the flange
which is provided with an internal circular groove c and a number of longitudinal
grooves d.
The tube e is introduced into the flange and spun or hammered into the circular
groove c thereby fixing it to some extent.
Clay is then applied to the rear of the flange and the grooves d are then filled
with hard solder f and the flange with the solder heated from the front.
Thus no weakening whatever of the tube takes place as after the cooling the
Hange, solder and tube form a uniform structure owing to the intimate com-
bination of the parts within the inner circle of the flange.
The grooves are so distributed as to leave enough material, in form of pro-
ections in the flange, to prevent the molten solder from damaging them. Thus
the tube is firmly secured by being first hammered or spun into the circular
groove c and then by brazing the solder in the groove forming intervals in regular
order around the said circular groove, this last arrangement being considered a
aluable feature.

page_text: If desired a second groove h may be provided for the purpose of receiving the
edge of the tube as shown.
After the brazing the outer face of the flange is cut and drilled according to
requirements.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is: -
A method of securing flanges onto tubes or pipes characterized by the flange
being formed with a circular groove.c. for the reception of the walls of the tube
which is spun or hammered into it and with a number of longitudinal grooves d
for the reception of the soldering material, the tube being thus united with the
flange by bulging intercepted by the soldering grooves.
Dated this 7th day of June 1899.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.