BoltEx® - Bolt Exchange Flange Clamp
BoltEx® ensures flange integrity during the bolt replacement under pressure, also known as 'hot bolting'.
Proven to perform at 1.5 times the design pressure even with all flange bolts removed - BoltEx® presents a robust and effective solution for ensuring bolted joint integrity.
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Quick and safe to install
+ 1-2 installers
+ Available for sale
+ No damage or disturbance to gasket
+ Optimised design and weight for efficient installation and handling
Robust and versatile
+ Proven to perform at 1.5 times the design pressure with all flange bolts removed
+ Countersunk bolts for space restricted locations (e.g., near valves or bulkheads)
+ Open design allows better access to the bolt removing tools
+ Designed to be reusable multiple times
+ Can be left in place for an extended period of time preserving flange integrity
Cost effective
+ Eliminates the need for plant shutdown to rectify bolting anomalies
+ Prevents loss of containment on flanges
+ Extends asset lifetime and reduces maintenance costs
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Innovative Gasket Protection System (GPS)
+ GPS prevents over-compression or release of sealing pressure of flange gasket
+ BoltEx® bolts are pre-loaded against the GPS; compression load on the gasket is maintained as the flange bolts are replaced
+ In case of flange bolt failure BoltEx® safely takes the load preserving joint integrity
Installation & Hot Bolting
Here is a quick explanation of what each part of BoltEx® does using the colours in the 3D model above.
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Use your mouse to grab BoltEx® and explore how it works for yourself - the mouse wheel will zoom in/out.
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RED – The threaded clamp half of BoltEx® into which the Gasket Protection System (GPS) hollow spacers (blue) are screwed.
BLUE – The Gasket Protection System (GPS) hollow spacers screw into the threaded clamp (red) and protect the flange gasket from being overloaded.
YELLOW – The slotted clamp half allows BoltEx® to be installed from one side only, as the supplied BoltEx® studbolts/hex nuts (green) are prevented from rotating by the slotted retainer.
GREEN – The required studbolt fasteners are supplied with each BoltEx® and pass directly through the slotted clamp (yellow), the hollow spacer (blue) and the threaded clamp (red). These studbolts provide the compressive force on the gasket while the flange studbolts are being exchanged.
BLACK & GREY – The target flange and the studbolt fasteners to be replaced.