Improvements in or connected with Pipes.
Year: 1898

page_text: Date of Application, 21st Nov., 1898-Accepted, 11th Feb.,
1899
COMPLETE SPECIFICATION.
Improvements in or connected with Pipes.
I, CARL BOLLÉ, of 57, Barton Arcade, Manchester, in the County of Lancaster,
Consulting Engineer, do hereby declare the nature of this invention, which has
been communicated to me by G. Brandt, of 4, Kochstrasse, Berlin, in the German
Empire, Patent Agent, 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 metal pipes, more particularly such as are made of
steel or iron, and to their connections and consists in providing said pipes and
connections with an improved lining capable of resisting the action of diluted
acids, chlorous water, salt brine and other substances that have a tendency to
destroy the metal of the pipes and connections. The improved lining consists
of paper, oilcloth, vulcanite fibre, asbestos or other similar porous material, which
after being introduced into the iron, steel or other metal pipe is impregnated in
a tank filled with a liquefied substance such as asphaltum, coal tar pitch or other
hydrocarbon that has the property of hardening after cooling.
Pipes of this kind are preferably made in the following manner:
A tube is made of the afore mentioned porous material somewhat smaller than
the metal pipe so that it can be easily inserted into the latter. In the regular
way of manufacturing a great number of metal pipes with the tubes of porous
material inserted into them are placed into a dipping box or rack. They are
then immersed into the melted hydrocarbon, which is kept at a high temperature,
until all the pores and crevices of the porous tube and the interstice between the
same and the metal tube are completely filled with the impregnating material,
and the metal pipe and its lining will be united into one single body after removal
from the tank and cooling.
On the drawing appended hereunto Figure 1 represents a piece of metal pipe I
and a piece of lining tube L, Figure 2 shows a longitudinal section of a pipe made
in this way while Figure 3 shows the same in cross section.
In order to put such pipes into practical use, they may be provided at their
ends with screw threads so that they can be screwed together with suitable
couplings in a similar manner as gas pipes. Tees and similar connections can be
fitted with suitably cut porous tubes and impregnated as hereinbefore described.
Suitable bends or elbows may be made of such pipes previously lined so that
the installation of each pipe may be carried out in any building as required.
Metal pipes lined and prepared in the manner herein before described will
resist the action of liquids or gases having a tendency to destroy the metal but
which are indifferent to solid hydrocarbons.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is:
1. The manufacture and use of a metal pipe lined with another pipe or tube
of somewhat smaller diameter made of porous material such as paper, vulcanite

page_text: fibre, oil cloth, asbestos or similar absorbent material, both being immersed into
a tank filled with melted asphaltum, coal tar pitch or other similar hydrocarbon
at a high temperature so that all the pores and crevices in and between the
metal and lining pipes are completely permeated and filled by the liquid hydro-
carbon, thus forming when cooled one compact body of the two pipes, substantially
as and for the purposes herein before described.
2. The manufacture of bends or elbows of metal pipes provided with a porous
impregnated lining pipe or tube substantially as hereinbefore described.
Dated this 19th day of November 1898.