TPi March 2015

products & developments Upgraded high speed pipe purging system

Sleeve lengths for each size have been carefully calculated so that the system can be pulled around 90° elbows for the purging of connecting joints. QuickPurgeIII systems are available for each API pipe diameter, with an expansion range to cover all internal diameters from schedule 10 to Schedule 160 and the even thicker pipe wall standards. Return on investment (ROI) charts are available, to show that the payback for each size will normally be between one and two welds, giving companies the opportunity to make significant savings on larger contracts. The materials chosen for QuickPurgeIII are resistant to the higher weld heat present now that the dams are slightly closer to the welds, and at the same time exhibit lower outgassing rates to prevent weld contamination. For welds that are pre-heated and post-weld heat treated, HFT manufactures the special HotPurge™III matching range, for higher and longer temperature exposure requirements. With QuickPurgeII, some customers requested longer sleeves for a variety of applications because of the positioning necessary for the second dam. This option is also available for the new QuickPurgeIII version. Huntingdon Fusion Techniques – UK hft@huntingdonfusion.com www.huntingdonfusion.com

increase of the inflation and purging gas.

The upgraded QuickPurge ® III pipe purging system has been introduced by Huntingdon Fusion Techniques (HFT) for high speed pipe joint welding. Using Intacal ® II combined with the integrated PurgeGate ® device makes it possible to safely inflate the dams with argon gas, prior to releasing it for purging the space between the dams where the weld joint is located. It is almost impossible for the inflatable dams to burst as a result of undue pressure increase or accidental flow

The sleeve between the dams reduces the volume to be purged by two thirds, ensuring a fast purge time down to ten parts per million of oxygen. HFT has a jointly owned patent for the design, having originally designed it with the help of Babcock International (now Doosan Babcock) for the contract to lay a stainless steel pipeline along the south coast of England for the transport of liquid natural gas from the Isle of Grain.

QuickPurge pipe purging system from HFT

Power tubes For over 60 years e2v has been supplying customers with power tubes that provide both performance and long life. The tubes offered by e2v range in power output from 30 to 530kW. Many of the triodes and tetrodes that the company manufactures can be used as direct equivalents for tubes created by other manufacturers, or can be used to replace them with e2v’s guidance.

the supplier/customer relationship, from initial product selection through to the tubes being in operation at the customer site. In order to meet customer requirements, e2v is committed to working in partnership with customers and developing collaborative solutions for new and existing applications.

All tubes are subjected to extensive high voltage conditioning and full functional RF/DC testing procedures, and a dedicated engineering team can provide advice on any particular tube or application. e2v states that it strives to be more responsive to customer needs by investing effort in reducing manufacturing lead-time and improving customer service. The company offers extensive technical support throughout

e2v – UK www.e2v.com

28

Tube Products International March 2015

www.read-tpi.com