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Flexible enclosure welding

Top: Flexible Welding Enclosure® ; bottom: Flexible Welding Enclosure® custom built for use during manufacture of racing vehicles
Top: Flexible Welding Enclosure® ; bottom: Flexible Welding Enclosure® custom built for use during manufacture of racing vehicles

Many of the metallic materials in common use now are prone to contamination when in contact with atmospheric gases, such as oxygen, nitrogen and hydrogen. This is particularly the case when this contact occurs at the high temperatures prevailing in fusion welding.

Control of contamination can be effected in the majority of cases by shielding the local welding area with a protective inert gas such as argon, as in GTAW ( TIG welding ) or by introducing a protective slag as in MMAW ( stick electrode welding ). With many metallic materials however, including some titanium and nickel alloys, more stringent precautions are necessary and to ensure satisfactory weld quality the entire joining process needs to be undertaken inside a vessel from which all potential contaminating products have been removed.

A glove box also provides the means of providing protection against contamination by using an inert gas such as argon to replace air by 'flushing' or 'purging'.

Purging has become the preferred term in this context. However these are still relatively expensive to manufacture.

For many years the cost of metal enclosures precluded all but the major companies taking on work involving fabrication of nickel and titanium alloys.

To the rescue came Huntingdon Fusion Techniques, HFT® a decade or so ago with the introduction of flexible enclosures that exploited the opportunities offered by advanced engineering polymers.

These innovative products offered significant attractions over both vacuum and glove box alternatives; a significant reduction in cost, very small floor footprint and availability of a range of sizes from stock. 


Since that time the HFT® product has been developed and is rapidly becoming the preferred alternative enclosure.

Technical Specification
The vertical sides are made from translucent material and the top is constructed using optically clear sheet. Ultra violet stabilized engineering polymers are used throughout during manufacture. Material thickness is nominally 0.5 mm (480 microns).

A principle access zip is fitted and this has a total length typically 60% greater than the enclosure diameter ie a 900 mm enclosure will have a 1400 mm long main zip. Additional entry points provide for operators gloves. A service panel incorporates access ports for welding torches and for electrical leads and cooling water supplies. A purge gas entry port and an exhaust valve to vent displaced gas to atmosphere are incorporated into each enclosure.

In the unlikely event that a repair is necessary, it can be carried out by the user on site. A kit is provided with each enclosure for this eventuality.

Cost
Size for size the HFT® range costs less than 10% of a metal glove box and only 2% that of a vacuum system.

Flexibility
Size and shape can be made to meet customer requirements. Standard models from 0.3 to 3.0 cubic metres are available from stock. Weight is very low and the enclosures occupy little space - the collapsed volume of a 1.25 metre diameter system is less than 0.2 cubic metres and weighs only 8 kg. They can thus be moved easily and stored efficiently so floor footprint is minimised.

Large viewing area
The entire upper section is manufactured from optically transparent ultra violet stabilized engineering polymer. This offers the opportunity for use by several operators at the same time – ideal for training purposes.

Multiple access points
Systems can be manufactured with numerous access locations for personnel gloves and gas/electrical entries. Large leak-tight zips afford easy access for components.

Flexible Welding Enclosures® are now used by leading manufacturing companies across the globe. The aerospace, automotive, biochemical, medical, food and beverage, semiconductor and nuclear sectors all take advantage of the low cost and ease of use.

All these operations are exposed to some extent to the need for extreme levels of quality control over cleanliness during manufacture. Contamination introduced during fabrication can so easily lead to loss of strength and corrosion resistance. Particulate contamination raises issues of expensive litigation or at best rejection of product.

All standard enclosures are packed in a box 1160 x 670 x 280 mm irrespective of size and their shipping weights are typically:

  • 7.2 kg for a 36" (900 mm) diameter enclosure
  • 8.7 kg for a 48" (1200 mm) model
  • 10.7 kg for a 60" (1500 mm) size

PUBLISHED: 05 Mar 15 Bookmark and Share
Company:
Huntingdon Fusion Techniques Limited
Visit Huntingdon Fusion Techniques Limiteds website
Country:
UK
Tel:
+44 1554 836 836
Fax:
+44 1554 836 837
Email:
marketing@huntingdonfusion.com
Website:
www.huntingdonfusion.com
Other News from Huntingdon Fusion Techniques Limited:

»
No lost purge during welding
»
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Launch of new Weld Purge Monitors® at Fabtech 2016
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Indian success with weld purging of titanium alloy pipe
»
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»
Switch to MultiStrike® for an improved and safer Tungsten Electrode performance
»
Fast purging of heat-treated pipework
»
Freeze sealing for pipe repairs with Qwik-Freezer™
»
Introducing super heavy duty Weld Backing Tape™
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Pipe Welding becomes easier
»
Extended inert gas coverage during titanium and stainless steel welding
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Inflatable Stoppers for pipe plugging and blocking
»
Measure your Argon for the best Weld Quality
»
Weld Purge your pipes at a low cost with Weld Purge Film®
»
Dramatically reduce Weld Purging times with QuickPurge®
»
Switch to MultiStrike® for an improved Tungsten Electrode performance
»
Flexible Welding Enclosures® for zero colour titanium welds
»
Weld purge your pipes the 'Elite' way
»
Monitor your Weld Purge at a low cost
»
Weld Backing Tape™ for weld purging
»
Weld purging company provides first class service
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No disruption to pipe repair with Accu-Freeze™
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Nylon Plugs for maintenance work
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Pipes welded faster
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Significant increase to your Weld Purge Monitor's sensor life
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Major petrochemical company uses Flexible Welding Enclosure®
»
Smallest ever Weld Trailing Shield®
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When the temperature rises, protect your Weld Purging System with new Heat Resistant Covers
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We have the key to your perfect weld purge
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PurgExtra® tube and pipe purging system
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Keep a distant 'Eye' on your Purge
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Ensure your Weld Purging System doesn't burst
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Block pipes instantly and effectively with Pipestoppers®
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Welding World Award Winner
»
Fast purging of heat-treated pipework
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For your PurgEyes® only
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Purge your tube and pipes the Elite way
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Flexible Welding Enclosures®, ultra low cost welding chambers
»
Use Backing Tape™ for perfect weld underbeads
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Bright, oxide free welds with Trailing Shields®
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Nylon Weld Purge Plugs for weld Purging
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Keep an Eye on your Weld Purge
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The use of water soluble Weld Purge Film™ for pipe purging
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Freeze sealing for pipe repairs with Qwik-Freezer™
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Argon Hose for your Weld Purging System
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Do not put your welds at risk
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Out with the old and in with the new
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Inflatable Stoppers come in many shapes, sizes and material
»
QuickPurge® your pipes for perfect welds
»
Keep your Eye on the Purge
»
Freeze sealing for pipe repairs with Accu-Freeze®
»
Flexible Welding Enclosures® - ideal for the welding of titanium and zirconium
»
Bright, clean, high quality welds with Trailing Shields®
»
PurgExtra™ tube and pipe purging system
»
Keep a distant 'Eye' on your Purge
»
Freeze sealing for pipe repairs with Qwik-Freezer®
»
Mechanical pipe sealing plugs
»
PurgElite® inflatable tube and pipe weld purging system
»
We have the key to your perfect weld
»
The use of Weld Purge Film® for Pipe Purging
»
MultiStrike® Tungsten Electrodes offer safer, cheaper TIG welding
»
Ensure your Weld Purging System doesn't overinflate by using a PurgeGate® Valve
»
Inflatable Pipestoppers, where access to the job site is difficult
»
Weld Purging provides the cleanest, highest quality and lowest cost welds ever!
»
QuickPurge® high speed pipe purging system
»
Weld Purge Dams
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Flexible enclosure welding
»
PurgExtra™ pipe weld purging system
»
HFT white paper: Remote Weld Purge Monitoring
»
Upgraded high speed pipe purging system
»
Pipe sealing plugs and stoppers
»
Low cost pipe weld purging system (for purging hot sections)
»
Keeping it clean with Argweld® Flexible Weld Purging Enclosures®
»
Largest inflatable Pipe Welding Purge System ever
»
Weld Purge Monitor® Family gets new addition
»
HotPurge™ pipe purging systems for pre-heated pipe welding
»
Return on Investment QuickPurge®II
»
QuickPurge® II
»
Launch of Argweld Pipe Weld Purging Systems® for tube, pipe and pipeline industries
»
Weld Purge Monitor improved to read down to 1 part per million
»
Fabtech/AWS annual exhibition was a great success for Huntingdon Fusion Techniques this year
»
Financial Director appointed at HFT
»
New style 'Weld Purge Monitor'™
»
The PurgEye® 300 Nano Weld Purge Monitor™
»
Complete family of 'Weld Purge Monitors™'
»
Orbital welding purge plug kits
»
Grapes or Sugaring? Pipe Weld Root defects can be a thing of the past
»
New white paper published - "Why Post Weld Purging is necessary"
»
New white paper published - "Why use a Weld Purge Monitor"
»
Launch of new Tube and Pipe weld purge systems™
»
PurgEye® 100 Weld Purge Monitor - comprehensive version
»
Weld purging systems


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From top left: Concentric clamping on Protem Beveling machine US40; Mandrel Diameter Range for the US25 beveling machine from 25-79.37 mm (1
Concentric clamping device for elbows
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PurgEye 1000 with Sensing Head
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» VIEW ALL NEWS «