Press

Double Freezing Technique for Large Diameter Valve Replacement

Posted by Michaela Reay

10-Oct-2017

huntingdonfusion.com


Replacing valves in a pipeline can be a challenge, especially when the pipelines have liquids running through them. One option is to completely drain the system to make the repairs, which can prove costly with respect to loss of expensive fluid, heating or cooling costs, security matters, time that system is down plus labour costs.

Pipe Freezing Experts Huntingdon Fusion Techniques HFT® recently introduced the Qwik-Freezer™ Systems to their Pipestoppers® Division. These systems create ice plugs or freeze seals in the pipes, avoiding the requirement to drain systems.

Qwik-Freezer™ is the industry standard portable CO2 Pipe Freezing System, in use around the World, covering pipe diameters from 3/8” – 8” (9 – 200 mm).

The quick and easy to use system requires very little set-up time and is the only CO2 Pipe Freezing System capable of freezing larger pipe diameters.

Georgia Gascoyne, CEO for Huntingdon Fusion Techniques HFT® said: “Qwik-Freezer™ has become the preferred solution for a wide range of water-carrying pipework, where valves need to be changed, in industry sectors such as petrochemical, building and maintenance services, food and beverage, hospitals, water treatment, shipping and aerospace.”

Once liquids have been brought to a standstill, a specially designed flexible jacket is wrapped around the pipe at the point where the freeze is required. A nozzle in the jacket is then coupled to a cylinder of liquid carbon dioxide by means of a high-pressure hose. For valve replacement, a second jacket is installed on the other side, creating a double freeze, blocking flow on both sides of the valve.

When the CO2 is injected into the space between the jacket and the pipe, at a temperature of -78oC, the pipe contents freeze and a secure ‘ice plug' is formed, which seals the pipe. The ‘ice plug' forms only in the section of the pipe covered by the jacket, so the resulting rise in pressure is very small and there is no damage to the pipe itself. The technique can be used safely on iron, steel, lead, stainless steel, copper, brass and plastic pipe.

Huntingdon Fusion Techniques HFT® have an Exclusive Distributor network, which can be found at: www.huntingdonfusion.com.



New service from OilVoice
Trip Shepherd is for companies who need to track their staff in areas of risk.
It's free to use, so we invite you to try it.

Visit source site

huntingdonfusion.com

qwik freezerpipe freezing

More items from michaelareay


Weld Purging CMV Steels

CMV Steels (chromium / molybdenum / vanadium) are widely used for their high temperature creep properties especially in the steam turbine industries. Both pre and post weld heat treatment is necessary to achieve the optimum mechanical strength, but temperatures up to 300ºC (572ºF) must be maintain ...

Michaela Reay


Posted 22 hours agoPress > hotpurgepipe purgingwelding cmv steels +2

Low Cost Weld Purge Dams

Weld Purging short pipe pieces and dome-end welds where tandem Inflatable Tube and Pipe Purging Systems are unsuitable, Huntingdon Fusion Techniques HFT® manufactures Weld Purge Dams. Ron Sewell, Chairman for HFT® said: “When welding tubes and pipes, the most cost- effective solution is to restric ...

Michaela Reay


Posted 9 days agoPress > pipe stoppingpipestoppershuntingdon fusion +1

High Temperature Weld Backing Tape®

Supporting the liquid weld root with a high temperature Backing Tape will ensure minimal oxidation and will require much less post-weld cleaning. Argweld® glass fibre Weld Backing Tape® from Huntingdon Fusion Techniques HFT® supports weld roots and eliminates the creation of slag, whilst removing co ...

Michaela Reay


Posted 16 days agoPress > backing tapeweld backing tapeback purge +1

Premium Quality Rubber Plugs

Lightweight Inflatable Rubber Plugs are available from the Pipestoppers® Division at Huntingdon Fusion Techniques HFT® for sealing, stopping and blocking pipes where oils, hydrocarbons and petrochemicals are present. Challenging pipe stopping conditions can cause major inconveniences but many alte ...

Michaela Reay


Posted 22 days agoPress > rubber plugspipe stopperspipe stopping +1

Monitor Your Weld Purge at a Distance

When welding long pipelines, one problem operators often face is not receiving a fast and true weld purge reading from the weld zone. Huntingdon Fusion Techniques HFT® make it possible to have an immediate reading of the weld purge gas from any distance up to 1,000 metres away with the PurgEye® 10 ...

Michaela Reay


Posted 24 days agoPress > huntingdon fusionpurgeyeweld purge monitor
All posts from michaelareay