elliott-tool 3400 SERIES Flaring Boiler Expanders 34xx-10516

elliott-tool 3400 SERIES Flaring Boiler Expanders  34xx-10516 

Elliott’s 3400 Series Flaring Boiler Expanders are the 
recommended tube expanders for flaring tubes in watertube 
and firetube boilers.
The prong style collar allows for uniform flare lengths as well 
as torque controlled tube rolling to obtain uniform expanded 
joints.
The 3400 Series Expanders are manufactured from high 
quality tool steels to assure for long life under the toughest of 
conditions.
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Features & Benefits:
• Prong style thrust collar - uniform flare lengths without 
risk of driving flare rolling into tube sheet.
• High quality steel for the most demanding boiler 
applications.
Mandrels are sold separately so users can choose from 
among a variety of mandrels best suited for their needs. 
Be sure to select a mandrel from the Spares & Accessories 
section below.
Spares & Accessories: 
• Drum Mandrel: Most commonly used mandrel. Best used 
when tube sheet is readily accessible to operator. 9-5/8" 
(244.5mm) to 17" (431.8mm) long.
• Header Mandrel: For reaching through a header or water 
leg. 18" (457.2mm) to 25" (635.0mm) long.
• Short Mandrel: Used in place of Drum Mandrel when 
working in tight areas or where tube bends too quickly. 
May require two or more mandrels to obtain full expansion 
range of the expander. 6-1/4" (158.8mm) long.
• Roll Set: Consists of (3) expanding rolls, (3) flaring rolls, 
and (6) roll retainer pins.
• Tube Rolling Lubricant See page 19 for part numbers