BoltEx - Flange Clamp

Safe bolt replacement on the live systems

Compact, robust, and quick to install – SRJ BoltEx is a flange reinforcement tool able to extend the flange lifetime and enable online bolt removal and replacement. Installing BoltEx provides a longer asset lifetime and reduced operational risks.


Extends safe lifetime of the flange and asset
Reduces risk of fugitive emissions from the loss of containment
Enables delayed maintenance -- no need to shut down the facility for installation
Innovative design enables fast and safe application (no need for time-consuming UTM and no disturbance to flange gasket)
Space restricted flange arrangements require bespoke design


Application Used for on-line bolt replacement or can be left installed as a preventative measure on defected flanges with bolts that are impossible to retrieve/replace.
Areas of Application Oil and Gas | Desalination | Mining | Utilities | Shipping | Power Generation
Compliance Corroded bolts replaced immediately in accordance with ASME PCC-2 (Hot Bolting).
Cost Significantly reduces costs by eliminating the need for plant shutdown.
Installation 1-2 man team can quickly and safely assemble the clamp and replace the old bolts with new.
Product Designed in accordance with ASME B16.5 to suit any standard flanges in almost any size, service, and pressure rating.
Safety Gasket Protection System (GPS) prevents gasket over-compression or release of sealing pressure - improved safety for the system and personnel | Can be left installed as a preventative measure on defected flanges where bolts are impossible to retrieve
Relative business impact
CO2 footprint reduction:
Cost reduction:
Safety improvement:
Technology Maturity Level
Development Technology demonstration Mature / Proven

About SRJ Technologies

SRJ delivers weld-free pipe repair and replacement solutions, bespoke EPRS tools and specialised engineering services, helping asset owners and operators improve safety, increase operational efficiency, and enable proactive and cost-effective approach to Asset Integrity Management.

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