Pressure testing

NHC product motif.jpg

 

JFD maintains one of the largest, UKAS approved, hyperbaric test facilities in the UK and provide an impressive range of services for research, development and testing.

Considerable investments in the variety and capacity of test vessels within NHC testing have been made over the past 5 years, making our facilities amongst the largest in the world, capable of simulating depths up to 800bar and altitudes of 55,000ft.

The variety of chambers enable us to pressure test a wide range of equipment of all shapes and sizes such as subsea control modules, umbilicals, valves, actuators, ROV and submersible vehicles, buoyancy control devices and underwater housings.

LargeChamberDoorOpeningLoopWithSub.gif

To follow NHC on social media, please use the below links:

NHC facebook small.png NHC linkedin.png NHC twitter.png

At the heart of the National Hyperbaric Centre is the large work chamber capable of simulating pressure depths to 100 bar or altitude of 55,000ft. The 3x8m chamber is ideal for subsea equipment testing and trials, hyperbaric welding and altitude trials.

The work chamber connects above to the transfer under pressure chamber and 16 man saturation system for use during manned trials and hyperbaric welding projects.

Download technical drawing:

Tech spec document.png 

 

Dimensions  

Pressure rating

Altitude rating

Temperature

Substance

Facilities

View full image

 

LargeChamber-small.gif

 

  • 3000mm internal diameter

  • 8000mm internal length

  • 63m3 internal volume
  • 100 bar

  • 993 msw

  • 1450 psi
  • 55,000ft
  • Low: 8°C

  • Ambient
  • Air

  • Gas

  • Water

Media

  • Internal lighting
  • Cameras 
  • Video recording
  • Internal Communications

Logging

  • Instrumentation Facilities
  • Yokogawa 

Extraction

  • Gas and water Sampling System
  • Fume extraction

Penetrators

  • Electronic
  • Hydraulic
  • Pneumatic 

    

Work Chamber  Work chamber showing access door  Submarine testing within work chamber  Manned trials  Valve testing within work chamber

View full image

WorkChamber PRODUCT IMAGE3.jpg

 View full image

Hyperbaric Welding PRODUCT IMAGE1.jpg

View full image

WorkChamber PRODUCT IMAGE4.jpg

View full image

 WorkChamber PRODUCT IMAGE2.jpg

View full image

Hyperbaric Welding PRODUCT IMAGE6 small.jpg

  

800 bar chamber

Our 800 bar deep equipment chamber is similar to our other small equipment chambers but has a much higher pressure rating of 800bar. 

Ideal for power supplies, cable assemblies, small electrical housings, underwater cameras and lights, this high-pressure chamber can test in a wet, dry or gas filled environment.

Download technical drawing:

Tech spec document.png 

 

Dimensions  

Pressure rating

Altitude rating

Temperature

Substance

Facilities

View full image

800BarChamber-Small.gif

  • 165mm internal diameter

  • 790mm internal length
  • 800 bar

  • 7944 msw

  • 11600 psi
  • 55,000ft
  • Ambient
  • Air

  • Gas

  • Water

Logging

  • Instrumentation Facilities
  • Yokogawa 

Extraction

  • Gas and water Sampling System

Penetrators

  • Electronic
  • Hydraulic
  • Pneumatic

    

 

220 bar chamber

With internal access of 860mm wide and 1540mm deep this chamber is ideal for valves, actuators, pumps, flow meters and cable assemblies including connections and penetrators.

The addition of a heating and cooling coil allows us to perform temperature cycles whilst at pressure.

Download technical drawing:

Tech spec document.png 

 

 

Dimensions  

Pressure rating

Altitude rating

Temperature

Substance

Facilities

View full image

220barChamber-small.gif

 

  • 860mm internal diameter

  • 1540mm internal length
  • 220 bar

  • 2184 msw

  • 3190 psi
  • 55,000ft
  • Ambient
  • High: 35°c
  • Air

  • Gas

  • Water

Logging

  • Instrumentation facilities
  • Yokogawa 

Extraction

  • Gas and water sampling system
  • Gas pressurisation and exhaust

Penetrators

  • Electronic
  • Hydraulic
  • Pneumatic

Access

  • 1 x 1/2" NPT drain
  • 8 x 1" NPT ports
  • 2 x 1.5" NPT ports
  • 2 x 2" NPT ports

    

200 bar chamber

Ideal for power supplies, cable assemblies, small electrical housings, underwater cameras and lights in a wet, dry or gas filled environment.

One of the features of this chamber is its 14 multi-way penetration ports which allow easy access for monitoring equipment testing.

Download technical drawing:

Tech spec document.png 

  

 

Dimensions  

Pressure rating

Altitude rating

Temperature

Substance

Facilities

View full image

200barChamber-small.gif

 

  • 270mm internal diameter

  • 685mm internal length
  • 200 bar

  • 1986 msw

  • 2900 psi
  • 55,000ft
  • Ambient
  • Air

  • Gas

  • Water

Logging

  • Instrumentation facilities
  • Yokogawa 

Extraction

  • Gas and water sampling system
  • Gas pressurisation and exhaust

Penetrators

  • Electronic
  • Hydraulic
  • Pneumatic

Access

  • 1 x 1/2" NPT drain
  • 8 x 1" NPT ports
  • 2 x 1.5" NPT ports
  • 2 x 2" NPT ports

    

Viewport test Jig

A viewport jig for high-pressure testing of acrylic viewports used in saturation diving complexes and submarines is available at the NHC.  

The use of acrylic plastic viewports has been standard for many years, however the development of polarised light testing has shown that there are various misconceptions about them. Acrylic viewports which are used under pressure are subjected to an increased rate of yield, giving them a slight permanent deformation and inbuilt stress. It is generally agreed that acrylic viewports should be replaced after 10 years of service.

Referring to IMCA guidance D047, viewports should be certified before use:
“Viewports should be proof stress tested and certified before installation.”
“All viewports in a pressure system need to be rated to the design pressure of the system.”
“Viewports which are not marked or properly documented should not be used.”

All viewport tests are independently witnessed by a class society. Successfully tested viewports are marked with indelible ink - date of examination, serial number and NHC identification number.
 

 

Facilities

Pressure rating

Temperature

Substance

View full image

Viewport Test Jig PRODUCT IMAGE1 full size.jpg

 

  • Interchangeable cores to allow various sizes and shapes of viewports

  • Accepts flat or conical acrylic viewports used for diving chambers, medical hyperbaric chambers and submarines
  • 150 bar
  • Ambient
  • Water

    

 

We are a UKAS approved EN 17025 Test Facility.

ukaslogo.png

 

Please visit the UKAS website for further details.

BACK TO TOP