PurgElite Inflatable Purging Systems

Low cost high value systems suitable for weld purging of tubes to tubes or fittings and pipes to pipes and fittings for 1 to 24″ (25 to 600 mm) diameter.

 

Description

Purgelite System Options – See Images Below

  • Optional PurgeGate Valve (Highly Recommended) acts as an anti-burst device and protects bladders from bursting due to overinflation or over pressurizing.
  • Optional Hose potection Sleeve when ordered is supplied pre-installed on the purge hose connecting two bladders making it heat resistant to 982 Deg C and protecting the hsoe from heat and splatter.
  • Optional Heat Resistant Covers can be mounted on the bladders and increase their temperature tolearance to 300 Deg C
  • Optional Additional hose lengths can be supplied to increase distance between the two dams, due to long bends, or to position bladders away from heat.
  • Optional Argon Supply hose in any lengths, fitted with fittings to connect to PurgElite system. Standard lengths available are 25′,50′,75′,100′ and 150′,
Part #Nominal Pipe
Size – Inch
Nominal Pipe
Size – MM
ID Range – MMOptional Heat
Covers
PL100011″25 mm13 – 38 mmHRC1001
PL10001.51.5″38 mm32 – 45 mmHRC1001.5
PL100022″51 mm38 – 64 mmHRC1002
PL100033″76 mm64 – 89 mmHRC1003
PL100044″102 mm89 – 114 mmHRC1004
PL100055″127 mm114 – 140 mmHRC1005
PL100066″152 mm140 – 165 mmHRC1006
PL100077″178 mm165 – 191 mmHRC1007
PL100088″203 mm191 – 216 mmHRC1008
PL1001010″254 mm241 – 267 mmHRC1010
PL1001212″305 mm292 – 318 mmHRC1012
PL1001414″356 mm343 – 368 mmHRC1014
PL1001616″406 mm394 – 419 mmHRC1016
PL1001818″457 mm445 – 470 mmHRC1018
PL1002020″508 mm495 – 521 mmHRC1020
PL1002121″533 mm521 – 546 mmHRC1021
PL1002222″559 mm546 – 572 mmHRC1022
PL1002323″584 mm572 – 597 mmHRC1023
PL1002424″610 mm597 – 622 mmHRC1024

PurgElite Inflatable Pipe Purging System – Construction & Use

PurgElite Inflatable Pipe Purging system, is an advanced tandem dam bladder systems,  and offers a simple, low cost solution to make high purity welds. The volume to purge is kept small, resulting in savings in both time and cost of inert gas used.

PurgElite Inflatable Pipe Purging bladders have two  purge bladders or dams connected by a new design inert gas purging tube. The inert gas purges air as well as other unwanted gases and vapours out of the space between the dams with inert gas.

The system features a ‘new’ design low profile non-metallic valve. In addition, these systems have no raised metal parts making them ideal for use in a wide range of industries that would normally use internally polished stainless steel tubing and piping.

Each system has 2 protected inflatable dams connected by an armoured heatproof spinal tube. When the tube or pipe is ready to be purged, the PurgElite Inflatable Pipe Purging system is inserted into the bore with one purge dam either side of the weld joint. When the gas line is connected to the purge system the bladders inflate to form a seal. The pressure in the system then opens the purge valve. The spinal tube carries the gas to inflate the purge dams and the low profile valve releases the gas gently, to purge the interspace without turbulence.

The inert gas is then fed into the space between the purge bladders expelling the air through the integral exhaust tubes. A weld purge monitor is recommended to measure the oxygen content in the purged area, and once the monitor indicates that the required purge has been achieved, welding can  be carried out ensuring a clean even penetration bead.

Afterwards, the purge dams are deflated simply by disconnecting the purge gas feed and the device easily removed, once the weld cools (Allow 2-3 minutes for weld to cool, to prevent damage to bladder). This uniquely designed system means that only one gas connection is required for both dam inflation and weld purging. An equal number of outlets are provided. Unwanted connections are left closed with the blanking plugs provided. The connecting spinal tube can be shortened or an optional longer tube can be provided to accommodate special requirements.

Old fashioned homemade devices like cardboard, paper dams or foam bungs, contain a lot of water, air and water vapour. Metallic valves scratch pipe ID. Bad products put your weld at risk and end up costing you more money.

This range of Argweld® PurgElite® Tube and Pipe Purge Systems are for pipes of nominal diameters from 1″ (25 mm) to 24″ (600 mm). For larger sizes we can supply as special order. However we recommend use our Quick Purge Systems for larger Pipe Diameters.

PurgElite® PURGE TIME (to 0.1% oxygen and less)

By using Argweld® PurgElite® Tube and Pipe Weld Purging Systems, the main savings, over any other system, are obtained in reduced
purging and waiting time, and in the much lower quantity of inert gas used.

Purging with old fashioned systems and homemade devices will require a flow rate of at least 24 L/min (50 cu ft/hr) for longer periods.

Purge time for PurgElite® Inflatable Tube and Pipe Weld Purge System to less than 100 ppm or 0.01% oxygen.

Test Pipe Diameter 4″ (100 mm)

Old fashioned or home made devices:

Purge time to 1,000 ppm…. 26 minutes
Flow rate 50 CFH (24 L/min)…. inert gas usage 18 Cu ft (624 liters)

Argweld® PurgElite® Inflatable Tube and Pipe Weld Purging System:

Purge Time to 100 ppm…. 3 mins 6 secs
Flow rate 21 CFH (10 L/min)…. inert gas usage 0.9 Cu ft (30 Liters)
Purge Time below 35 ppm…. 7 – 10 mins (with extra gas inlet and exhaust integrated)

High quality circumferential butt-welding of tubes or pipes with other tubes, pipes or fittings, requires inert gas to be used inside the bore to prevent oxidation and notching of the root penetration weld bead.

The tandem based Argweld® PurgElite® Inflatable Tube and Pipe Weld Purging System has been designed specially for this work.

Argweld® PurgElite® Inflatable Tube and Pipe Weld Purge Systems simplify the process of inert gas purging.

Quick and easy to install

Quick fit couplings complete with “O” ring for gas tight sealing and stainless steel collet to hold the tube mechanically tight. Now fitted with “Anti-Release” circlip to prevent parts accidentally separating inside the pipe.

Innovative purge gas feed device

No complicated valve to set.

Inflation of purge dams & inert gas purging with one line

No chance of inflatable purge bladders bursting due to over pressurisation. One hose from the inert gas supply is all that is needed.

Specially developed purge dam connection hose

Purge Dam hose, resistant to hot metal up to 300ºC. Synthetic spinal connection hose gives complete flexibility to go around bends. Low vapour pressure material. No scratching of internally polished surfaces. For higher temperature & spatter resistance we offer as an option, hose protection sleeve that will upgrade the temperature tolerance to 982 Deg C.

For all grades of stainless and duplex steels, with and without polished interiors, titanium, zirconium and any other exotic metals or alloys.

Centrepiece Glow Positioning Indicator

Argweld® PurgElite® cost saving systems can be positioned accurately.

The glow strip positioning band in the centre of each system gives ease of use when positioning the device underneath the weld.

Size range: 1 – 24″ (25 to 600 mm) Ø

No restrictions in elbows or bends in pipe work.

First inflatable 1″ (25 mm) system available.

Uses less inert gas

Special gas usage system significantly cuts the volume of gas used compared to all other methods.

Faster

The Argweld® PurgElite® System is very quick and easy to install. It can be positioned accurately and the purge dams inflate instantly.

No difficult valves to set, therefore saving time

Bladder purging time is a fraction of that required by conventional methodsleading to significant savings and waiting costs. Cost savings charts are available on request.

The volume to be purged is localised.

Low Price

Dramatic decrease in prices over all similar models. Payback could be as less as one weld.

Repeatability

Highly reliable, giving regular, repeatable, controlled high quality results.

Gas pressure control ensures an even positive root bead with no notching.

Manufactured to Nuclear Quality Standards with Nuclear approved materials, these systems guarantee bright, shiny, coke and oxide-free welds.

Because Argweld® PurgElite® Inflatable Tube and Pipe Weld Purging Systems have no metal parts exposed, internally polished stainless steel tubes are protected.

Argweld® PurgElite® Inflatable Tube and Pipe Weld Purging Systems from 1″ upwards are ‘State of the Art’ newly evolved technology by Huntingdon Fusion Techniques HFT®.

PurgElite with Hose heat shielding heat & spatter resistant to 982 Deg C

Optional  Hose Protection Sleeves

available for applications which have longer exposure to heat and are recommended for 1″  to 8″ diameter pipes and tubes.

PurgElite heat resistant covers

Heat Resistant Covers

These are available as an accessory to both PurgElite® and PurgExtra™ Tube and Pipe Weld Purging Systems. The Heat Covers are held on with ties and there are holes provided for the PurgElite® fittings, such as inlet, exhaust and crimped end.

Temperature rating up to 300ºC (572ºF).

The Heat Covers are provided in sets of two and they are available for each specific diameter from 1 to 24 inch (25 to 600 mm).

Visit our category page for our range of Pipe Purging Equipment

Visit Huntingdon Fusion – manufacturer’s Argweld PurgElite Pipe Purging