Charles Robert Arcus

Patents Numbers:

GB256453 - 1926
GB282990 - 1928 (improvements)
CA274216 - 1927
FR624857 - 1927
US1660406 - 1928
DE460346 - 1928

Boiler Tube Cleaning
Owners and users of Steam Boilers are fully aware of the importance of keeping the heating surfaces clear of scale, but owing to the difficulty in removing the deposit, especially in multi-tubular boilers, reduced efficiency from this cause is universal.

It is to meet this difficulty that our tube cleaning tool has been introduced.

The Tool consists of heating apparatus which is passed slowly through the boiler tube, and the heat causes a slight expansion of the diameter of the tube, and at the same time a longitudinal expansion.

As the scale on the outside of the tube does not expand in the same ratio as the metal, the scale cracks or splits, and falls off the tube; sometimes in small pieces, and sometimes in semi-circular sections 2ft or more long, according to the condition and quantity of the scale.

After cleaning, the tubes are left free from scale, and are as efficient for the generation of steam as when the boiler was new. They are then expanded in the usual way.
Photo showing scale lying in the bottom of the boiler after falling off the tubes. The heap of scale extended along the bottom the whole length of the tubes.

The question will naturally arise in the mind of any responsible engineer as to whether there is any prospect of damaging the boiler.

The results were carefully watched when the Inventors were making their experiments, and since then thousands of tubes on various vessels belonging to different ports have been cleaned. In some cases the tubes were over twenty years old.

In no case has there been any damage caused by the process. On the contrary, the passage of the tool heats the tube to a moderate temperature; never more than a very dull red heat, though usually the scale flies off at a "black heat".

The tube is allowed to cool out naturally, so the metal is annealed, and its structure returned to its original condition.

Thus, in addition to the great saving in fuel effected, the tubes are left in a better condition than before being cleaned.

Photo showing specimens of scale rernoved from a boiler. Note the 2ft rule showing size of pieces.

It is a matter of great importance that this tool is "Fool Proof".

It can generate the necessary heat to clean the tubes, but not sufficient to over-heat or damage them.

An example of the value of the process is as follows:
A small trawler, with ordinary marine type boiler, making short trips, used 11 tons of coal per week when new. It was impossible to clean the tubes properly by the ordinary means, and the consumption gradually rose to 17 tons per week. After cleaning with our process, the consumption returned to 11 tons per week.

Of course the economy effected varies with the condition of the tubes before cleaning, but the result is always substantial.

It is not uncommon for a two-furnace boiler to yield 8 to 10 cwt. of scale.

Photo showing heap of scale in stockhold as removed from a trawler's boiler. Boiler has 2 furnaces, 80 tubes. Weight of scale - 8 cwt.

Amongst vessels which have been, treated by "CLAXUS PROCESS" are:
Lady Luck
George Hay
Set Weather
West Anglia
Lo List
Arthur Gouldsby
Ramsey Bay
Young Sid
Fluer Baix
Above text and photos are taken from the "CLAXUS" brochure.
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