FlexEJ Products People

24hr Shipping
On all stock items ordered.
Mon-Thur by 2pm, 10am Fridays

Design & Manufacturing
Full in-house design & manufacture to EN / ASME / PED.

ISO14001 Accreditation
FlexEJ has an accredited Environmental Management System.

Union End Metal Bellows

FlexEJ union-end HVAC axial compression expansion joints come with a BSP union swivel at both ends complete with fibre washer and stainless steel convoluted bellows from DN15 (15mm) to DN50 (50mm):

How to specify a metal expansion joint

Metal bellow engineeringWe design and manufacture metal expansion joints so you are not restricted to our range of standard products, some of which are available in our web shop. For simpler applications a standard product may be entirely suitable but if not we will design to meet your exact requirements.

An overview of FlexEJ's HVAC Union End Metal Bellows

FlexEJ’s Union End Metal Bellows are for use on threaded connections and axial compression:

316 stainless steel bellows Threaded female BSP
Iron swivel unions Rated 6 Barg @ 150°C
Minimum length design For axial compression
FlexEJ Union End Metal Bellows

Specifications

All sizes available from our web shop. For ratings and dimensions please see our catalogue or range tab above.

HVAC Union End Metal Bellows Finders and Calculators


We have several easy to use tools and calculators to help you find the right HVAC Union End Metal Bellow from our online stock with next-day UK delivery. Our Thermal Expansion Calculator for Piping helps you estimate the increase in length of a pipe run with temperature.

Our Advanced Bellows Finder is a quick way to navigate our stock range of bellows, both metal and rubber. With just a few choices you can arrive at the appropriate selection – criteria include pipe size, type, media compatibility, installation length, pressure rating, pipe connection type, conformance and movement axial, lateral and angular. All the products are in the online store with 24hr shipping as standard. If you’re not sure what flange you need, our handy Flange Finder should also be useful.

Stock HVAC Union End Metal Bellows Finder

Do search for union end metal bellows by pipe size, intended media and/or connection hardware to see FlexEJ’s stock bellows options below but don’t hesitate to call us on 01384 881188 or email us for more bespoke or OEM options or if you need any advice at all.

DN12 (½″) FlexEJ Union Pipe Expansion Joint - Length 181 mm
DN12 (½″) FlexEJ Union Pipe Expansion Joint – Length 181 mm
DN20 (¾″) FlexEJ Union Pipe Expansion Joint - Length 187 mm
DN20 (¾″) FlexEJ Union Pipe Expansion Joint – Length 187 mm
DN25 (1″) FlexEJ Union Pipe Expansion Joint - Length 191 mm
DN25 (1″) FlexEJ Union Pipe Expansion Joint – Length 191 mm

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 sales@flexej.co.uk

HVAC flanged axial bellows comparison chart


Is this the best flanged metal bellow for your application? Three potential alternatives to consider:

HVAC
Pump
Bellows
HVAC Pump Bellows

10/110°

View

Industrial
Pump
Bellows
Industrial Pump Bellows

16/180° to 12/300°

View

HVAC
Axial
Bellows
HVAC Axial Bellows

10/110°

View

Industrial
Axial
Bellows
Industrial Axial Bellows

16/180° to 12/300°

View

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 sales@flexej.co.uk

Frequently Asked Questions

A. Yes. We hold stock of the most popular metal bellows for HVAC. Many of these items are available on 24hr delivery from our online web shop. We can also manufacture to order. For sales assistance please contact us or use our Live Chat facility. In addition, FlexEJ holds a large stock of the most popular sizes and types of Elaflex rubber bellows as well as our HVAC value bellows range.

A. Our Flange Finder contains details for many common flanges. Typically, to be able to make the identification you need to know the bore size or outside diameter and number of bolts. For technical assistance contact us or use our Live Chat facility.

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.

A. Yes, if you have the details we can normally offer an equivalent, our FAQ here gives the information we will need for a full selection. For technical assistance please contact us or use the Live Chat link on this page.

A. To identify an existing expansion joint we need to know: nominal bore, overall length and flange type plus service, temperature, pressure and required movement if known. Try our Flange Finder to help identify the flange and you can send us a picture of the existing part using the Contact us form. For technical assistance please contact us or use the LIVE CHAT link on this page.

A. Yes, our MRCA copper ended metal expansion joints also have WRAS approval. We laso have DWI approval for stainless steel expansion joints. For technical assistance please contact us or use the Live Chat link on this page.

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