TPT March 2018

T E CHNOLOG Y

Freezing technique for valve replacement 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 the system is down, and labour costs. valves need to be changed, in industry sectors such as petrochemical, building and maintenance services, food and beverage, hospitals, water treatment, shipping and aerospace.” so the resulting rise in pressure is small and there is no damage to the pipe. The technique can be used on iron, steel, lead, stainless steel, copper, brass and plastic. Huntingdon Fusion Techniques, together with US partner COB Industries, distributes pipe freezing equipment throughout the UK and Europe.

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 using a high-pressure hose.

Huntingdon Fusion Techniques – UK Website: www.huntingdonfusion.com

Pipe freezing expert Huntingdon Fusion Techniques (HFT) has added Qwik-Freezer™ systems to its Pipestoppers ® division. These systems create ice plugs or freeze seals in the pipes, avoiding the need to drain systems. The Qwik-Freezer portable CO 2 pipe freezing system covers pipe diameters from 9 to 200mm ( 3 / 8 " to 8"). The quick and easy-to-use system requires little set-up time, and is capable of freezing larger pipe diameters. Georgia Gascoyne, CEO for Huntingdon Fusion Techniques, commented, “Qwik-Freezer has become the preferred solution for a wide range of water-carrying pipework, where

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 CO 2 is injected into the space between the jacket and the pipe, at a temperature of -78°C, the pipe contents freeze and a secure ‘ice plug’ is formed. The ice plug forms only in the section of the pipe covered by the jacket,

Qwik-Freezer pipe jacket kit

Britannia Conventional Rotators 5000kg – 30,000kg In stock Made in Europe. Sale or Hire Bode Welding Lathe for Circumferential TIG. Repetitive welding or for individual work Option to Fully Refurbished to Order

Bode 2/HSW 200/2000 Longitudinal Seam Welder Weld cylindrical, conical and rectangular work pieces and flat sheet

FOR HIRE Orbital Welding Equipment Power Supplies, Weld Heads and Accs. Huge Selection. AMI, Polysoude, Magnatech, Orbimatic.

Equipment Wanted We Buy Used Welding Equipment associated with Tube and Pipe Production Any Age or Condition considered. Referral Fee Paid for Introduction Orbital Welding systems, Tube & Pipe Rotators, Positioners, Tractors

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MARCH 2018