AF3 Series Boiler Tube Expanders
Economical tube expander when flaring tubes
The
AF3 Series is the ideal boiler tube expander for the flaring of
tubes. Made with a sturdy construction with the rollers self
contained. Also available with three types of mandrel, Drum, Header
or the Short Series for in limited space as shown below:
Above can be seen the short series mandrels where on this version three mandrels are needed to complete the roll process
Features:
- Most economic Expander available when flaring is required.
- Strong construction with rollers contained in a cage.
- Overlapping rollers prevent ridging.
Range:
- 7/8" OD to 4.1/2"OD.
- 3 BWG down to 20 BWG
- 1/2" to 2.5/8 Tubesheet Thickness
Follow this pdf link for the full specification sheets
Training Tips:
Question:
How to find out what the finished ID should be after rolling a tube
before carrying out a pullout test.
Even if you are not carrying out pullout tests you should know the finished ID of the rolled tubes so this can be checked as the rolling of the tubes proceed.
Example:
1.250"OD x 0.105" wall thickness
Recommended expansion 0.009"
Tube Sheet Hole 1.260"
1. Tube ID before Expansion 1.040"
2. Recommended expansion 0.009"
3. Difference between Tube OD
and Tube Sheet Bore Hole 0.010"
Finished ID (Add1,2,and 3) 1.059"