Metal Hose. A very flexible solution

Any length, high pressure & temperature...

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Metal Hose Assemblies


FlexEJ designs and manufactures fully engineered metal hose assemblies in diameters from DN6 to DN200. Hose core materials available include 321 stainless steel, 316 stainless steel and alloy 625.

PRODUCT GUIDES

Metal Hose

What is a metal hose assembly?

A core of convoluted metal hose, braid and end fittings....

  • Design
    Extensive range of core hose and materials suitable for a wide range of industrial services.
  • Performance
    High quality EN10380 hose in 321 or 316 stainless steel up to 625 Nickel alloy.
  • Application
    FlexEJ will help you select the right hose for the application.
  • Configurable
    Flanges or a vast selection of other end fittings, materials, lengths can all be specified to order.

How to specify metal hose assemblies


1 Engineered For You2 Movements3 Temperature & Pressure4 Media Compatibility5 Diameter, Length & Ends6 Let us help
Rubber bellows Temperature & PressureWe design and manufacture metal hose assemblies to meet your requirements.
Rubber bellows Rubber CompatibilityMetal hose is designed to work by angulation only, it should not be used for axial movement. For this reason S shaped or U shaped installations are common, generally the hose should be perpendicular to the direction of movement.
Rubber bellows Diameter and LengthMetal hose can be applied at very high pressures with multiple external braids. Increasing temperature will reduce the pressure capability of the hose.
Rubber bellows Flange Drilling & RestraintsThe most common material used for metal hose is Stainless Steel - 304, 321, 316 - and for more demanding applications Nickel Alloys - 625, 800, 825. Corrosion is the most likely failure mode for the hose itself so the correct material selection is important.
Rubber bellows MovementsAssemblies with lengths to 50m in smaller diameters and hose diameters to DN200 can be manufactured. There is a huge choice of fittings for metal hose assemblies, just let us know what you require. It is essential that no torsion is applied to the hose when installed so one fixed and one swivel end is common.
Rubber bellows Help Call our expert team on +44 (0) 1384 881188 or email us at sales@flexej.co.uk or use Live Chat on this web site - we are here to help, please get in touch.

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

Metal Hose Assemblies


A metal hose assembly typically consists of a convoluted metal hose core, external braiding if required and end fittings:

Hose Core
DN60 to DN200+

Metal Hose Core

HOSE CORE
Stainless Steels, Nickel Alloys

The hose core is manufactured from a strip of material that is formed and continuously welded into a thin tube which is simultaneously convoluted to form a hose. The core is robust but will extend on the application of internal pressure so an external braid is applied which restrains the pressure force and keeps the hose at a set length.

External Braids & Spirals
DN6 to DN200+

Metal Hose External Braids & Spirals

EXTERNAL BRAIDS AND SPIRALS
Eliminate Pressure Force

The external braid is not added to the hose for mechanical protection. It is a key component and considerably increases the pressure rating of the hose assembly by restraining the pressure force. Single braid is the most common but we can also supply with double and triple braids for higher pressures. If mechanical protection is required then we can add an external spiral which keeps the braid off the ground if being used for loading/unloading for example.

Movements
Loops, laterals

Metal Hose Movements

MOVEMENTS
LOOPS, LATERALS

Hose does not move in the same way as an expansion joint; there must be no axial movement and all movements should be the result of angulation. Apply a portion of the hose perpendicular to the expected movement and support it so that the minimum bend radius is always maintained. Sharp bends should be accomplished using elbows. FlexEJ will help you specify the hose, understanding the nature of the movement and suggesting a suitable solution.

Projects
Hose assembly solutions

Metal Hose assembly

PROJECTS
HOSE ASSEMBLY SOLUTIONS

FlexEJ specialises in engineering and manufacturing metal hose assemblies to order. Full documentation packages, NDT, material traceability and testing are all part of what we offer. Complex materials, jacketed hoses, very high pressures... - please get in touch and we will be pleased to help.

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

Metal Hose End Fitting Types


There is a great variety of possible end fittings and connections, typically the two end fittings are dissimilar; we can accommodate any requirement as long as the material and fitting are weldable. The most common fitting styles are:

Weld end Flanged - fixed
Flanged - loose, stub + swivel Lever Lock Coupling - male
Lever Lock Coupling - female Threaded - male
Threaded - female, fixed Threaded - female, swivel nut flat seat
Threaded - female, swivel nut cone seat Quick Release

Metal Hose Materials


The end fitting material does not need to be the same as the hose - carbon steel fittings with stainless steel hose is a common choice. You may specify any weldable material for the end fitting or a screwed fitting welded to the hose and any threaded fitting coupled to it.

Metal hose is stocked in the following materials:

Stainless Steel 304/L Stainless Steel 321
Stainless Steel 316/L High Nickel Alloy 625
Monel 400 Hastelloy C276

Other grades are available to order. Hose braid is typically 304 stainless steel or 316 with higher alloy core.

Temperature deration

When considering the hose material it is important to also consider the design temperature.

The allowable pressure rating of metal hose for a particular material will decrease with temperature being typically around 0.5 of rated pressure at 500C - the exact figure depending on the material.

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.

Metal Hose Design & Application


The actual service conditions the hose will experience – such as pulsating or discontinuous demand, type and frequency of motion, working temperature - must be taken into account at the design stage.


Metal hose bending radius

Metal hose bending radius

The allowable bending radius for the hose depends on the type of motion the hose will experience, this is described as:

  • Single motion – infrequent or installation-only movement.
  • Repeated motion - low frequency / motion without major dynamic demand.
  • Dynamic motion – higher frequency / continuous motion with dynamic demand.

Metal hose movement

Metal hose must not be installed to accommodate axial movement or torsion. Movement ideally should be lateral, in a single plane, with the hose or piping incorporating elbows to achieve this as required. Please refer to our hose installation guidelines in the Technical Downloads section.

Metal Hose Projects


If required we can offer the same extensive NDT and manufacturing documentation as with our metal expansion joints and pressure vessels. This capability allows us to serve demanding end users in the petrochemical, refining and energy markets with unique custom designed metal hose assemblies.

Traceability

Material traceability and NDT are managed through a specially developed data base which integrates with our business system. The database allows for instant reporting of material and inspection status together with indexing / retrieval of certification for the manufacturing data book.

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

 

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 9am to 4pm weekdays 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.

Call Us

Can't quite find the right bellow?

Try the FlexEJ Bellows Finder

Or call our expert team on +44 (0) 1384 881188

Frequently Asked Questions


Q. Can metal hose assemblies have liners?
A. Yes, a strip wound hose can be used as a liner within a convoluted metal hose assembly. Flexibility is reduced to some extent. For technical assistance contact us or use our Live Chat facility.
Q. What is a jacketed metal hose assembly?
A. A jacketed hose has a second outer hose over the inner which allows (typically) a cooling or heating medium to be introduced. An example is shown in the gallery : scroll to the bottom on the metal hose page. For technical assistance contact us or use our Live Chat facility.
Q. What is the bend radius for a metal hose assembly?
A. The bend radius depends on the hose diameter and the type of motion. The static bend radius is the minimum radius the hose can bend to for a few movement cycles without fatigue failure. The dynamic bend radius is the minimum radius the hose can bend to for many movement cycles without fatigue failure. ISO10380 defines these parameters. For technical assistance please contact us or use our Live Chat facility.
Q. What is metal hose?
A. Metal hose is manufactured in continuous lengths from metal strip which is welded and then formed. We offer U form convoluted metal hose which is mechanically or hydraulically formed, with standard or close pitch. Typically the hose conforms to ISO ISO10380. For technical assistance please contact us or use our Live Chat facility.
Q. Do you stock metal hose assemblies?
A. No, we only manufacture to order but lead times can be very short. For sales assistance please contact us or use our Live Chat facility.
Q. How do you identify flanges?
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.

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

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.

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 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