ARGWELD® PIPE PURGING SYSTEMS FOR 2-12 INCH PIPEWORK High quality circumferential butt welding of tube to tube, pipe to pipe and pipe to fitting requires inert gas to be used inside the bore to prevent oxidation and notching of the root penetration weld bead. The best systems devised for this are the Argweld® Pipe Purging Systems. They are quick, reliable and easy to use. The volume to purge is kept small, resulting in signif.icant savings in both time and the cost of inert gas used. The Argweld® Pipe Purging Systems are based on a simple idea. It comprises two protected inflatable dams connected by a spinal tube. The tube carries the gas to inflate the dams and to open the release valve to purge the space between the dams. The selected system is inserted into the bore of the pipe or tube to be welded with one dam either side of the weld joint. The dams are inflated to form a seal, after which the pressure in the system opens the purge valve, the inert gas is then fed into the space between the dams expelling the air. Welding can then be carried out, the inert gas ensuring a clean even penetration bead. Afterwards, the dams are deflated and the device easily removed. This uniquely designed system means that only one inlet is required for both dam inflation and introduction of the purge gas. The relief valve can be set to work at any desired flow up to 20 litres/minute. The relief valve can be set to inflate the dams and purge the interspace simultaneously every time. Compared to other methods of gas purging for pipe welding, the Argweld® Pipe Purging System has a number of distinct advantages leading to big cost savings. • Uses less inert gas The volume to be purged is localised. For a typical pipe run, the volume of gas used is less than 2% of that required for a conventional purge. • Faster The system is very quick and easy to install. It can be positioned accurately and the dams inflate instantly. The purging time is a fraction of that required to purge by conventional methods. • Easy to use Argweld® Pipe Purge Systems greatly simplify the process of inert gas purging. Training is minimal, leading to bright shiny welds very quickly. • Improved quality of welds The process involved is highly reliable. It gives regular, controlled high quality results. • Fast pay back The Argweld® Pipe Purging System pays for itself in just a few welds.

Copyright © 2001-2009 All rights reserved. This publication may not be reproduced by any means without the written permission of Huntingdon Fusion Techniques Huntingdon Fusion Techniques Limited, Stukeley Meadow, Burry Port, Carms SA16 0BU United Kingdom Telephone: +44 (0) 1554 836 836 Facsimile: +44 (0) 1554 836 837 Email: [email protected] http://www.huntingdonfusion.com We also manufacture a number of other weld purging products as well as special tungsten electrodes and Tungsten Electrode Grinders. • Trailing Shields • Backing Tape • Weld Purge Monitors • Tungsten Electrode Grinders...