Rental Equipment Available USA and Canada
Rental Equipment call 613 764-0572 for availability
boiler tube expanders
All Boiler Tube Expanders are available in many of the different series from straight configuration to flared. The majority of common expanders are kept in stock from 1.1/2", 2.0", 2.1/2" and 3.0"OD in stock ready to ship the continent North America usually within 24/48hrs using UPS as our major carrier.
Electric Rolling Drives
Made in Germany - powermaster rolling motors
The Eibenstock electric rolling drives have the torque to complete boiler retubes without even breaking into a sweat. Outputting 174 Ft/Lbs in torque, these
drivers can roll up to 3.0"OD steel tubes. On the larger ETE units the load speed can be from 30 to 230 RPM so this makes these drivers ideal for powering internal tube cutters on tube removal.
We can supply in either 240 or 120 volt configuration 50/60Hz as required.
Click on the picture to be taken to the correct page.
Combination Beading Expanders
Combination beading tools, 2.0", 2.1/2" and 3.0"OD.
More and more companies are getting away from the the old way of beading boiler tubes with pneumatic
hammers. The old process involved rolling and flaring the ends. Beading with a pneumatic hammer which has left many an old
boilermaker deaf for the rest of his life. then re-rolling the tube to tighten it up after beading.
Using the Combination Beading Expander could not be more simple. From setting the projection from the sheet according to the
gauge (wall thickness) the process is one easy operation. Insert the tool and roll and bead complete with
no going back to re-roll.
Theory of Operation
The combination beading and expanding tool simultaneously expands and beads the tube end in a single operation. Operating as it does, the tool assures the creations of a joint, which is both pressure tight and has a bead in intimate contact with the tube sheet. The tool achieves this objective by the natural feed force built in to the expander to force beading against the end of the tube while expansion is taking place. The ability of the tool to satisfactorily accomplish this depends upon the amount of tractive force available being of sufficient magnitude to enable feeding forces to be developed which will enable the beading roll to deform the end of the tube and press the bead tightly against the sheet. The tractive force is made a maximum by utilizing five expansion rolls in place of the three or four normally found in expanders of this type and by the use of coolant, which has the quality of minimum lubricity. If the beading roller expander is set so full expansion is accomplished before the bead has been formed, it will not be possible to complete a proper bead without further expansion of the tube. The tool operates such that, once the beading roll has encountered the end of the tube, the entire inward force of the tool is available to form the bead. However, this force is not always of sufficient magnitude to perform the required operation. The force is at a minimum initially while the expander is expanding the tube to a metal to metal condition. At this point the tractive force increases sharply and builds to a maximum as the expansion progress. When the stop nut on the mandrel engages the thrust bearing on the cage housing preventing any of the mandrel. This force then diminishes as continued rotation of the expander irons out the tube bead. This is why it is necessary that the beading operation be completed before the final expansion of the tube since it will require the maximum tractive force available to perform the beading.
The tool operates such that, once the beading roll has encountered the end of the tube, the entire inward force of the tool is available to form the bead. However, this force is not always of sufficient magnitude to perform the required operation. The force is at a minimum initially while the expander is expanding the tube to a metal to metal condition. At this point the tractive force increases sharply and builds to a maximum as the expansion progress. When the stop nut on the mandrel engages the thrust bearing on the cage housing preventing any of the mandrel. This force then diminishes as continued rotation of the expander irons out the tube bead. Therefore, it is necessary that the beading operation be completed before the final expansion of the tube since it will require the maximum tractive force available to perform the beading. Because of normal manufacturing practices, it would be possible to perform a proper beading and expanding operation with the tool without necessary setting it so that the beading roll was in contact with the end of the tube. How far back would be determined by two factors, one would be the amount of clearance between the tube sheet hole and the tube OD. The greater this clearance, the further back the beading roll could be set since effective tractive force will not be developed until the tube has been expanded to the metal to metal condition. The second factor would be to set the tool with the beading close to or in contact with the tube end. It must be emphasized that no expanding tool can do a satisfactory job unless the following three items are complied with:
- 1. Tool of the correct size
- 2. Tube ends and tube sheet holes have been properly prepared and are clean.
- 3. The tool is properly lubricated.
Compliance with these requirements is even more of a critical nature when using the Combination Beading Expander.
As you can see from above all the rolls are consistent and uniform. These were 2.1/2" OD tubes and as you are rolling and beading at the same time you need a rolling motor rated for at least 3.0"OD. On the beading tool the beading roller is captured by a retainer plate which in some boilers foul the corresponding tube bead. This can be rectified by chamfering the edge of this plate with no detrimental effect on the operation of the tool.
PR68 series - Internal Cutter
The ultimate high quality internal tube cutter
The PR68 Series is the best
choice for cutting thick walled tube
and pipe. The standard reach is 4.0"
and additional reaches are available
in 4.0" increments up to 16".
If
a longer reach is required we can
manufacture the unit to cut up to
6ft+ for "down the hole" operations.
The
internal tube cutter is driven via
the square drive in a clockwise
direction using either electric,
pneumatic or hydraulic driving
units.
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