WELD BACKING TAPE 2010
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OTHER PURGING PRODUCTS ARGWELD® PURGE MONITOR MK V ARGWELD® LEADING AND TRAILING SHIELDS Before welding can begin using an inert gas, it is essential to know that the oxygen content at the weld area has been reduced to a satisfactory low level. The ARGWELD® Leading and Trailing Shields are designed for high quality gas coverage of titanium, duplexes and other reactive metals while welding. They can be supported to fit any make of TIG or plasma welding torch for manual and automatic welding on pipes, vessels or flat plate. The ARGWELD® Purge Monitor MK V is specifically designed to measure oxygen content of below 0.1% with a high degree of accuracy. An oxygen content of below 1% is normally considered suitable to ensure that there is no oxidation of the weld, although there may be some exceptions to this when welding materials such as titanium and zirconium. WELD BACKING TAPE By using an ARGWELD® Trailing Shield, welds will be left bright and shiny and eliminate discolouration, oxidation, porosity, etc. A R G W E L D ® Tr a i l i n g Shields will reduce gas consumption, save re-work and eliminate wasted material costs due to oxidation. The Trailing Shields are manufactured to suit each application, with versions for flat plate/ sheet, for any diameter of tube , pipe or vessel and radiused for welding on the outside or the inside of vessels. ARGWELD INFLATABLE PIPE PURGING SYSTEMS The ARGWELD® Inflatable Pipe Purging Systems are a twin dam system for creating a purge area in all pipe and fitting sizes of 50.8 - 1,828 mm (2 - 72”) diameter. The systems isolate a 10” length either side of the weld and allow quality, fast purging of the interspace and easy withdrawal afterwards. ARGWELD® PURGE MONITOR ARGWELD® WATER SOLUBLE PURGE FILM The use of water soluble purge film for manufacture of purging dams is well proven and the ARGWELD® Film gives superior results over all other water soluble products. It can be used for stainless, duplex and chrome-moly steels as well as titanium. The ARGWELD® Soluble Purge Film makes dams which produce an impenetrable purge barrier but which can easily be washed away when hydrostatically testing the pipe or just by normal wash out. It dissolves completely without leaving any fibres to clog up filters or other sensitive parts in a system and it is strong in all directions so that it can maintain a good gas barrier throughout the purging process. The film and adhesive are completely biodegradable and all packaging materials are recyclable. Typically for the welding of thin wall stainless steel sheet and vessels from one side only, the backing tape can be attached to the backside of the weld, to support the weld pool, keep the argon from the weld torch surrounding the weld pool and eliminate the need to back purge, while giving a consistent high quality underbead profile. Quick Purge™ Systems ABT AH82 09/04/2010 GG Extending the ARGWELD ® range of purging products, Huntingdon Fusion Techniques are providing an economical non metallic weld backing system for the backing of welds, where purging is required but not easily achieved, for quality and for supporting weld roots to improve weld bead profiles. We also have a wide range of other products for pipework fabrication and welding. Ask for details about: • • • • • ARGWELD® Water soluble purge film ARGWELD® Purge enclosures ARGWELD® Purge Plugs TECHWELD™ Tungsten electrode grinders TECHWELD™ Multi-Strike™ tungsten electrodes 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: hft@huntingdonfusion.com http://www.huntingdonfusion.com Copyright © 2000-2010 All rights reserved. This publication may not be reproduced by any means without the written permission of Huntingdon Fusion Techniques For purging large vessels the tremendous savings of purge gas and waiting time, pays for the use of the backing tape many times over. The high temperature heat resistant adhesive aluminium backing foil is 75 mm (3 inch) wide and in the centre is a heat resistant band of woven glass fibre cloth 25 mm (1 inch) wide. The Amperage range for the tape ranges from 0 through to 240 Amps depending on thickness of the woven glass fibre. The thickness of the cloth will support single pass welding. (Without change to the chemistry or metallurgy of the weld). Features: Provides back purge facility Ideal for stainless steel and alloyed metals Saves cleaning costs Massive purge gas savings Eliminates weld defects Suitable for sheet, plate, pipes, vessels For horizontal or vertical welding Allows faster welding with lower skilled

Glass fibre tape materials - the cost-effective solution sion welded joints it is unnecessary to go to the trouble and expense of ensuring fully continuous transition of metal between parent materials. The fillet weld and the partial penetrating butt weld are thus ade- quate in many circumstances: employed intelligently they are capable of meeting many structural requirements and as a con- sequence are in widespread use through- There remain nonetheless some de- manding requirements where maximum joint strength is mandatory. Products sub- jected to mechanical fatigue, corrosion re- sistance...