Safe and easy to use, the FlangeBoss spreads flanges evenly and safely during gasket changes and pancake blind installations.
Flange Boss flange spreaders actuate mechanically, pneumatically or hydraulically. The rotating Cam-Wedge design with versatile hex drive attaches to the flanges through the bolt holes, securing flange spreaders to piping so it cannot slip out.
Flange Boss spreaders are available with 25,000 lbs. of spreading force, and fit 1/2″ to 24″ flanges from ANSI 150 lb. to 2500 lb., or DN 15 – 600 (refer to DIN EN ISO 9002 and 6708).

Simply put, the FlangeBoss is one of the world’s safest and toughest flange spreaders. Made in the USA.
FlangeBoss is your safest choice in a pipe flange spreader.


3 Series Specific Models

Works on any 1/2″-24″ Diameter ASME Flange

FBX 150-300
All 150-300 Series Flanges
FBX 400-600
All 400-600 Series Flanges
FBX 900-2500
All 900-2500 Series Flanges



SMP carries the best hands-free maintenance tools.

SMP offers the most complete line of flange alignment tools on the market.

SMP stocks the largest variety of pipe flange spreaders in the country.

Specifically designed to make Operations work safer and more efficiently.

Invaluable during your next big turnaround or maintenance project.

Safe, easy to use portable pipe lifter tools.