HFT: “keep a distant ‘eye’ on your purge”
Published by Angharad Lock,
Digital Assistant Editor
World Pipelines,
When welding lengths of tube and pipework fabrications, as well as sections of pipelines of 20 m length and more, one problem operators face is not receiving a fast and true weld purge reading from the purge zone.
Huntingdon Fusion Techniques HFT makes it possible to have an immediate reading of the weld purge gas at the underside of the joint, from any distance up to 1000 m away with their PurgEye® 1000 Weld Purge Monitor®.
Luke Keane, Distributor Support for HFT® said: “By using a zirconia sensor in a remote module placed at the purge gas exhaust, really close to the weld, it is possible to instantaneously receive actual oxygen readings down to 10 ppm (0.001%) up to 1000 m away.”
If exhaust gas from a normal weld purge system is piped down a hose to a distant measuring instrument, it may take many minutes, or even hours, for a stable reading to reach the sensor and the exhaust gas may be contaminated on the way. The PurgEye® 1000 Weld Purge Monitor® has been developed to overcome such difficulties and has a sensor placed immediately next to the weld purge site.
The sensor is secured in a tiny module, which is mounted inside the purging system and is connected to the measuring instrument by a data cable. The purge reading is sent back to the instrument.
This way, the operator can be certain that the weld purge reading is correct and that the joint will not be adversely affected by oxidation, allowing welders to achieve that sought after zero colour weld.
Edited from press release by Angharad Lock
Read the article online at: https://www.worldpipelines.com/equipment-and-safety/05052016/hft-keep-a-distant-eye-on-your-purge-625/
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