FlexEJ has full UK in-house design and manufacturing capabilities to EN, ASME and PED standards.

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Design, Manufacturing & Special Projects

FlexEJ is a manufacturer. Working to industry recognised standards and the PED, we design and engineer complex expansion joints and pressure vessels as well as developing new products. In collaboration with our customers, we meet their specifications on build-to-order projects as well as providing innovative solutions where appropriate.

FlexEJ has developed robust in-house systems for controlling project documentation and manufacturing records which ensure final documentation is delivered within days of the physical items being complete.

Prefer to talk shop?

Just call us. Or we'll call you.

You can call the team on +44 (0) 1384 881188 or hit the get a quote button and we'll call you back

Key design and manufacturing expertise

Product design, project delivery through to OEM partnership - FlexEJ have the skills and tools to deliver value

Design - Metal Bellows Expansion
Manufacturing & Projects

Product design - Metal Expansion

Manufacturing & Projects

Metal bellows design is an iterative process. The task is to search for the optimum solution: a rugged, long life bellows which can still provide the required movements at the specified pressure and temperature. The more we understand about your application the closer to that optimum we will be able to get.

FlexEJ has developed and qualified its own integrated suite of tools for bellows design to EJMA10, component temperature modelling and restraint design for tie rods, hinges and gimbals.

These tools enable our design team to quickly calculate and optimise a new expansion joint based on your design specifications. This tool-set integrates with SolidWorks.

Overall design to B31.3 or EN13445 and PED as required.

Project Engineering and Documentation
Expansion & Vessels

Pipe Expansion Joint Engineering

Control and Traceability

Being a manufacturer with a strong project engineering team allows us to work with our customers' systems and requirements from the very earliest stages of the project though to successful completion.

Documentation and material control is achieved using a database which integrates together our ERP system with the engineering drawing and component details. This enables us to compile the manufacturing data book in real time as materials are received, welded or any NDT is carried out.

We are very well versed in project documentation, having worked with many large clients who require us to adhere to their own project specific formats and content.

OEM Partnership
Design, manufacture, stock, distribute

OEM Engineering Partnership

Part of your team

We have a long and successful history of working with OEMs, some for over 16 years now, covering everything from the simplest metal hose to large pressure vessels.

FlexEJ is highly adaptable and willing to develop the processes required to support long term manufacturing partnerships; we understand what it takes to deliver value.

Our design team, experience and capability is at your disposal to bring high value products to the market quickly. By working closely together, we can ensure the design is optimised for manufacture in our facilities, minimising costs and improving lead times.

Got a quick question?

Use Live Chat. Or call us.

For instant advice use the Live Chat link to message one of the sales team. Or call them direct on +44 (0) 1384 881188


Who can you talk to?

Try our sales and customer service team on 01384 881188

They don't bite. And they know what they're talking about. Call the team any time from 8:30am to 3:30pm weekdays, 12:30pm Fridays or use LIVE CHAT if you would prefer a quick text answer. For more complex queries, send us any pro-forma documentation using the get a quote form below or email us

Call Us

Need a detailed quote?

Get A Quote. On us.

We will provide full technical details together with, pricing and shipping timescales. For more complex engineered quotes, preliminary sketches and calculations will be available.

Frequently Asked Questions

Q. Do you manufacture pressure vessel packages?
A. Yes, we can package the vessel with associated piping, valves, instrumentation and equipment, skid mounted or free standing. To view some examples of our past projects, go to the pressure vessels page and scroll down to the gallery. For technical assistance please contact us or use our Live Chat facility.
Q. Do you design your own pressure vessels?
A. Yes, FlexEJ designs and manufactures engineered pressure vessels to PED, ASME 8, EN13445 and PD5500 as required – plus customer specifications. We can also manufacture to your design and drawing. For technical assistance contact us or use our Live Chat facility.
Q. Are you ISO9001 and ISO14001 accredited?
A. Yes, FlexEJ is accredited to ISO9001:2015 and ISO14001:2015. For sales assistance please contact us or use the Live Chat link on this page.
Q. Do you design your own metal expansion joints or rubber bellows?
A. Yes, FlexEJ has full design capability for engineered metal expansion joints and can work to any recognised standard – typically EJMA, B31.3/Appendix X, EN14917 plus PED and/or other customer specifications. Engineered rubber expansion joints are typically designed to meet the FSA guidelines plus PED and/or other customer specifications For technical assistance please contact us or use the Live Help link on this page.
Q. Who can I talk to at FlexEJ?
A. If you have any questions you would like to ask us directly please use LIVE CHAT or call us directly on 01384 881188 or use the CONTACT US form and we’ll get back you asap, usually within 24hrs, sooner if more urgent.

Please visit our full FAQ page to see all our frequently asked questions.

Can't see what you want? Need help?

Call us. Or use Live Chat.

For instant advice. We can custom-design and engineer almost any expansion joint you need for delivery in the UK or worldwide. Call our expert team on +44 (0) 1384 881188. Or email us

Got a quick question?

Use Live Chat. Or call us.

For instant advice use the Live Chat link to message one of the sales team. Or call them direct on +44 (0) 1384 881188

Get A Quote

Please complete the short form here and we'll get back to you within 24hrs Monday to Friday (quicker if marked urgent).

Alternatively, you can also call our expert team directly on +44 (0) 1384 881 118 from 8:30AM to 4:30PM weekdays (12:30PM Fridays), who will be only too pleased to talk through your requirements and technical queries over the phone.

Visitors are also welcome Monday to Friday although please get in touch beforehand to let us know you're coming.

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    Industry experience

    FLEXEJ Ltd was formed in 2002 by two professional engineers who brought together an already highly respected design capability with business and commercial skills gained in large multinational companies.
    • Our focus has always been on application and design – helping our customers find the best value solution.
    • We have a strong engineering and manufacturing team with experience in petrochemicals, refining, nuclear, desalination though to HVAC.
    • The team is also very familiar with meeting complex requirements for documentation, in process NDT and test on projects. We have supplied many large end-users such as EDF, Exxon, Shell, Reliance & QatarGas working with major contractors such as JGC, Foster Wheeler & Technip.
    FlexEJ Industry Experience