Hydraflex, a leading manufacturer of metal hose assemblies in the UK, offers a range of Duplex Hose Assemblies that come in various configurations including unbraided, single stainless steel external wire braid, or double braid for enhanced working pressure handling. These assemblies are part of Hydraflex's broader offerings of metallic hose and bellows assemblies, catering to a diverse clientele both within the UK and overseas​​.

Construction and Compliance

The construction material for the hose is Stainless Steel 316L, while the braid is made of Stainless Steel AISI 304/304L. These assemblies can operate within a wide temperature range of -269°C to +600°C. The available sizes range from ¼” NB to 16” NB. Hydraflex employs a fully penetrated TIG welding method in compliance with their approved weld procedures to manufacture these hoses. Every unit is 100% pressure tested to a minimum hydrostatic pressure of 1.5 times the design pressure. Furthermore, these hoses have PED 2014/68/EU approval with material certificates to EN 10204 available for all sizes​​.


Duplex assemblies find applications across:

  • Building Services
  • HVAC-R Piping Lines
  • Pump Connections
  • Vibration Producing Systems
  • Industrial Process & Applications
  • Steam Connections
  • Chemical Process
  • Gas Connections
  • Ultra-High Vacuum Applications
  • Exhaust Systems​​.

Benefits and Features

The duplex assemblies by Hydraflex offer various benefits including:

  • Ensuring that the conveyed media maintains a specific temperature, typically using steam or hot water in the outer jacket.
  • Absorption of heat expansion, angular movements, and oscillations.
  • Compensation for parallel pipeline set off.
  • Installation facilitation involving high and low temperatures.
  • Vibration elimination​​.

Availability and Customisation

Hydraflex provides a wide array of end fittings in different materials such as Carbon Steel & Stainless Steel. The typical stock range includes:

  • Various types of connections like BSPT/NPT Hex Fixed Male, Weld Nipple, Flanged (fixed and swivel), Tube End, and Victaulic Grooved connections among others.
  • Customisation options include 45 Degree (135) or 90 Degree Configuration for end fittings, to cater to different requirements.
  • Hydraflex operates from multiple locations within the UK and offers both stock and made to measure metallic hose and bellows assemblies, thus ensuring availability and options for customisation to meet specific client needs​​.

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