Argweld PurgExtra User manual

© HFT®
USER INSTRUCTIONS
PurgExtra®
Inatable Pipe
Weld Purging System

PAGE 2
Copyright © HFT®. All rights reserved.
This publication may not be reproduced by any means without the written
permission of Huntingdon Fusion Techniques HFT®.
All logos, names, trademarks are the property and ownership of HFT®.
E&OE

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INDEX
Index................................................................... 2
Introduction........................................................ 3
System operation............................................... 4
Instructions for use........................................... 5
Simple steps...................................................... 6
Comparative examples for purge time................. 7
Replacement dams............................................ 8
The family range of Weld Purge Monitors®...... 9
Our range of Inatable Tube, Pipe and Pipeline
Weld Purging Systems........................................
10
Range of purge accessories for welding.................. 11
Other products...................................................... 12
Other languages................................................ 13
Customer support and worldwide care................. 14
Warranty............................................................. 15
Address and contact details................................ back cover

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INTRODUCTION
Thank you for purchasing our Argweld®PurgExtra® Inatable Pipe
Weld Purging System.
We hope this will be successful for you and for the best results
please read instructions before use. If other people use this system,
please ensure that all users either read these instructions or receive
training. Each system is provided with this instruction manual.
These instructions are designed to help the operator obtain the best
results and to prevent damage to the system by incorrect operation.
The procedures outlined must be followed to prevent the risk of
any damage or operator injury.
Should the operator experience difculty in understanding these
instructions or the operation of this system, please contact your
Distributor who is trained in the correct operation of these devices.
In the event of further problems please notify the manufacturer,
Huntingdon Fusion Techniques HFT®, prior to making any alterations
or repairs.
It is intended that the device should be connected to the chosen
back purge gas supply. The purge gas will rst inate the system
and then purge the interspace between the two dams. A two stage
regulator should be used to ensure a regular gas output pressure.
When possible, it is recommended to use a gas ow meter to ensure
that the gas ow rate remains constant at the correct level.
© HFT®

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SYSTEM OPERATION
Correct installation and use of the system will ensure clean, good and
even penetration beads on all pipe joints. By localising the volume
to be purged, savings can be made on waiting time, shielding gas
costs and productivity will increase.
The PurgExtra® Pipe Weld Purging System comprises two inatable
lightweight polyurethane coated nylon covered dams, connected by
a protected spinal tube which is covered in a low vapour pressure
synthetic material to prevent scratches on the inside of polished
tubes or pipes.
The length of the spinal tube may vary according to purge dam
diameter but can be specially changed if the application requires.
The Argweld® PurgExtra® Inatable Pipe Weld Purging System has 3
additional inlet/exhaust ports for applications requiring larger volumes
of purge gas such as titanium welding. Plugs are provided for those
ports that are not required for use.
When an extra purge gas line is connected, the additional exhaust
ports will allow the extra purge gas to escape without over pressurising
the weld pool.
Each Argweld® PurgExtra®System is designed for one nominal pipe
size and all internal diameters of that nominal size (for example, the 4
inch dam is designed for 4"schedule 10 to schedule 160 sizes). If the
device is used in smaller pipes, it may crease and let air in, resulting
in a contaminated weld.
If the operator attempts to use a device in a larger pipe than it was
manufactured for, it will not function. Each device must be used at the
ow rate recommended otherwise it will not function correctly.

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INSTRUCTIONS FOR USE
To ensure consistent results the following set up and operational
procedures should be adhered to:
In use, the purge system will need a constant gas ow and pressure.
The system is tted with a preset argon release valve to purge the
interspace after the dams have inated. Gas ow rate and pressure
must be kept constant for good results.
Gas ow rate should be set to 5 - 8 L/min (11 - 17 CFH) and maintained
at that rate.
By localising a purge with a high quality system like PurgExtra®,
traditional purging methods using high ow rates are no longer
appropriate.
Once a pipe is dammed with an Argweld® Pipe Weld Purging System
which localises a volume of pipe either side of the weld, the operator
can purge at a low ow rate 5 - 8 L/min - (11 - 17 CFH), achieving
fast purge times.
Any additional purge that might be needed can be achieved using a
secondary purge feed.
3 inlet/exhaust ports are integrated in the system for additional purge
gas and to vent any pressure build up.

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1The Argweld® Pipe Purge System is positioned using the nylon
pull tags shown below marked
(a) .
2The Argweld® Pipe Purge System is inated using the inert gas
supply.
Once the Purge System is inated, the pressure opens the purge
valve, the air space is purged by the inert gas, displacing the air
between the dams. At the required O2level, the joint is ready
for welding.
3 During welding the ow rate of inert gas should be maintained
to purge any oxygen released by the increasing temperature.
4When the weld is completed and the post purging time has
passed, the purge line can be detached and the system deated.
It may be advisable to allow a cooling time before removal of
the Argweld® Purging System.
SIMPLE STEPS
Note: Outside of the joint will normally be taped when the joint design is not
closed butt
IntaCal®
Inert Gas
(a)
Inert Gas
Air
Air out
Argon in
Inert Gas
IntaCal®
IntaCal®
3 inlet/exhaust ports
3 inlet/exhaust ports
3 inlet/exhaust ports
Inert gas
inlet hose
3 inlet/exhaust ports
Air and inert gas out.
Connect to a PurgEye® Weld Purge
Monitor® to establish when the
oxygen level has been reduced
sufciently for your needs.

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Deation is usually carried out by detaching the inert gas ination
line from the supply. The inert gas will simply ow out of the gas
connector and the dams will collapse allowing them to be easily
removed.
Another perfect pipe weld!
Do not use “makeshift” devices like cardboard dams or foam bungs.
They contain a lot of water, water vapour and air, put your weld
at risk and end up costing you more money.
Use the proper tool for the job!
WARNING
Failure to comply with these instruction procedures may lead to
damage being caused to the dam assembly which may not be
covered by our warranty terms.
SIMPLE STEPS Continued
COMPARATIVE EXAMPLES
of PURGE TIME
REPLACEMENT DAMS
In the event of one of the dams being damaged, replacement dams
are available.
The dams are easily changed.
Please contact us or your local Distributor for information.
Pipe Length Pipe
Diameter
Normal Purge
time at 10 L/ min
(168 cfh)
Argweld®Time at
10 L/min
(168 cfh)
10 m (33") 102 mm (4") 26 min 1.5 min
10 m (33") 203 mm (8") 83 min 4 min
10 m (33") 305 mm (12") 173 min 8 min

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Argweld®PURGEYE® FAMILY RANGE of
WELD PURGE MONITORS®
The PurgEye®200 IP65 Hand Held with PurgeNet™
• Readings from 1,000 down to 1 ppm.
• Internal electro-mechanical pump with 1 l/m ow rate.
• USB lead included to control PurgeLog™ software.
• Long life, faster response sensor.
• Warning alarm levels between 1 and 999 ppm.
• Flow detection for accurate reading of gas samples.
The PurgEye®300 Plus with PurgeNet™
• Measures and indicates from 1,000 to 10 ppm (0.001%).
• A unique, fast response, lifetime sensor.
• PurgeLog™ data logging software* included.
• Internal alarm and security pin code facilities.
• 2m x 6mm polypropylene hose for inlet and outlet exhausts.
The PurgEye®300 Nano
• ‘New’ unique solid state long life sensor.
• Less than 60 seconds warm up time.
• No need to constantly calibrate, integrally mounted sensor.
• Low cost, small, lightweight monitor reads accurately to 10 ppm.
The PurgEye® 500 Desk with PurgeNet™
• PurgeLog™ data logging software* included.
• Reads PPM or Percentage.
• Specially designed, extra long life sensor with faster response.
• OLED screen with stunningly clear, bright gures and text.
• Reading from 1000ppm - 1ppm.
• Audible alarm features to indicate low and high levels of oxygen.
• Visual Alarm System as an accessory.
• Integral pump with ow rate 3.5 - 4 l/m.
The PurgEye®600 Touch Screen
• Reads PPM or Percentage.
• PurgeLog™ data logging software* included.
• Large touch screen with on-screen graph of the current weld.
• Internal sampling pump with gas ltration.
• User port with two outputs to control welding equipment or activate alarms in the event of a rise in oxygen levels.
• No more wet cells to keep replacing and recalibrating.
• Quick t and quick disconnect ‘leak tight’ purge tube ttings.
The PurgEye
®1500 Site IP68 with PurgeNet™
• Internal electro-mechanical pump with 3 l/m ow rate.
• USB lead included to control PurgeLog™ software.
• IP65 rated with the lid open, IP68 with lid closed.
• Warning alarm levels between 1 and 999 ppm.
• Flow detection for accurate reading of gas samples.
• Power on / off with standby button for sensor warm up.
The PurgEye
®1000 Remote with PurgeNet™
• Comes with a hand held display and a 10 m lead as standard.
• Optional 100 m reel of outdoor cable with locking connectors.
• Reels of extensions cable can be connected to make longer leads upto 1 km!
• Easy to pull through pipes.
• 1” ø stainless sensor holder to place at the weld site inside pipes to send purge data to the monitor up to 1km away.
The World standard PurgEye® 100 IP65 Hand Held
• Push button ‘Auto Calibration’ feature at precisely 100 ppm as well as at ambient (20.94%).
• Leak tight probe assembly.
• Low battery indicator and low sensor indicator.
• Increased sensor reading range.
• Quick connect/disconnect leaktight ttings for gas purge tubing.
PurgeNet™ controls the welding power sources such as orbital welders and any other automatic welding systems
to switch on and off according to oxygen levels, transferring data easily with the ability to link to external devices.

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Argweld®PurgElite® and PurgExtra®
Inatable Tube, Pipe and Pipeline Weld
Purging Systems simplify the process
of inert gas purging and are quick and
easy to install. New, low prole Intacal®
technology, eliminates the big metal valves
that are difcult to set. Suitable for tubes
and pipes from 1” - 24” (25 - 610 mm).
Argweld®QuickPurge® Inatable Tube,
Pipe and Pipeline Systems are used for larger
diameter, high quality, reliable welding of
stainless steels, duplex steels and titanium
tube and pipe joints to ensure a very fast
weld purge time and a very high quality weld
root, free from oxidation and discolouration.
Suitable for pipes of 6” - 88” (150 - 2,235 mm).
With new RootGlo®accessory and new
IntaCal®purge gas release.
The Argweld® HotPurge®Pipe Weld
Purging Systems For Heat Treated Chrome
and High Strength Stainless Steels where
the post weld heat treatment temperatures
may be as high as 760˚C (1400˚F). These
high quality manufactured heat protected
systems are suitable for the welding of pre-
heated pipework, such as chrome steels,
typically P91, CMV, etc.
Single ended Argweld® Inatable Weld
Purge Dams for closure welds, T piece
joints, dome end connections and so on,
where a conventional Tandem Purge System
cannot be used. Manufactured for pipe
diameters from
6” - 88” (152 - 2,235 mm).
Argweld®FAMILY RANGE of
INFLATABLE TUBE, PIPE and PIPELINE
WELD PURGING SYSTEMS