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Purge your Heat-Treated Pipework Confidently!
Argweld® HotPurge® Inflatable Pipe Weld Purge Systems for Heat-Treated Pipework have been developed so that pre-heating, welding and post weld heat treatment can be carried out with the purge system in place. Using the latest IntaCal® and PurgeGate® technology to inflate the dams, purge the weld zone with the guarantee that the purge dams cannot burst through over pressurisation. In addition RootGlo® Centre Alignment Band can be used for accurate positioning of the system precisely under the joint.
Inflatable Weld Purging Systems have been specifically designed for tubes, pipes and pipelines to achieve oxide free, porosity free, clean, safe welds.
Old fashioned pipe purge bladders and tandem purging gas bags usually burst. Therefore our systems are specifically engineered with anti-burst features to avoid any risk of bursting. Our Pipe Purge Systems can be used time and time again.
Return on Investment (ROI)
All Argweld® Pipe Weld Purging Systems and all PurgEye® Weld Purge Monitors® provide instant Return on Investment.
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Read MoreFor Easy, Fast Purging of Heat-Treated Pipework
The Argweld® HotPurge® Heat Resistant Pipe Weld Purging Systems are for use where temperatures might rise to 300ºC (572ºF) and last up to 24 hours.
Available for all pipe diameters from 6 to 88" (152 to 2,235 mm).
These high quality Pipe Weld Purging Systems are ideal for the welding of pre-heat and post-weld heat treated chrome steels such as P11, P22, P91, P92 CMV etc.
Argweld® HotPurge® Heat Resistant Inflatable Pipe Weld Purging Systems come with an innovative central band for easy positioning inside the pipe. This RootGlo® band will gather light prior to placing into the pipe and will glow for many hours of use.
The welder can position these systems prior to pre-heating and leave them in place throughout the pre-heating, welding and post-heat treatment cycles, allowing the weld to be purged continuously for up to 24 hours.
HFT® is the innovator, developer and original manufacturer of these unique systems and using our scientific knowledge and background, allows us to constantly update our products. HotPurge® now come complete with RootGlo®, a Centre Alignment Band, IntaCal®, a unique purge gas release system and PurgeGate®, a revolutionary device by HFT® to prevent the systems from bursting.
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Read MoreSizes from 6 to 88 inches (152 to 2,235 mm)
Some advantages and key features of the Argweld® HotPurge® Heat Resistant Inflatable Pipe Weld Purging Systems.
Flexible for use in pipes, bends, elbows etc.
Excellent seal against pipe walls.
Suitable for 24 hour cycles including pre-heat, welding and post-weld heat treatment.
RootGlo®, a highly luminescent Centre Alignment Band for easy positioning and easy view through weld root. RootGlo® absorbs enough energy during daylight hours to provide up to 12 hours of luminiscence inside the pipe.
IntaCal®, a streamlined, neat, clean and controlled method of releasing purge gas into the weld root space.
PurgeGate®, a unique and revolutionary method to provide infinite flow control and to prevent the inflatable dams from bursting, all to provide the user with super high speed welding of joints that have to be purged.
Manufactured to Nuclear Quality Standards with nuclear approved materials, these systems guarantee bright, shiny, coke and oxide-free welds.
Accepted and in use by most major power operators around the World.
Designed and manufactured by Huntingdon Fusion Techniques HFT® specifically for the power industry where high strength chrome alloy steels are used.
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Read MoreTechnical Data and Specification
The Argweld® HotPurge® Heat Resistant Inflatable Pipe Weld Purging System comprises a tandem inflatable dam system connected by a volume reducing collar.
Available for all pipe diameters from 6 to 88" (152 to 2,235 mm).
A gas system IntaCal® eliminates old fashioned valves and provides a more accurate and controlled purge gas release.
The inflatable dams and umbilical hose are covered with a heat resistant material and insulated accordingly for use in pipework where the temperatures may rise as high as 300ºC (572ºF) for 24 hours or more.
Each system incorporates RootGlo®, a Centre Alignment Band around the centre for positioning purposes which will glow up to 12 hours inside the pipe.
PurgeGate® is the most revoluntionary device on these systems which provides pressure and flow control as well as a guarantee against bursting due to over pressurisation.
Multiple sintered outlets disperse weld purge gas evenly without turbulence.
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Read MoreFrequently Asked Questions
1. How can Argweld® HotPurge® help me?
HotPurge® Pipe Weld Purging Systems for Heat Treated Chrome and High Strength Stainless Steels were developed for the welding of chrome steel pipe joints where the post weld heat treatment temperatures may be as high as 300ºC (572ºF). These Systems will allow you to generate zero colour coke free welds without any defect caused by harmful gases or vapours. If you have any welding tasks where the heat generated might be too high for the other pipe purging systems in our range, it might well be appropriate to use HotPurge® Systems.
2. What range of sizes is available?
6 to 88” (152 to 2,235 mm).
3. What is the overall length?
The dimensions between the dams vary from 28-36”. In the event that you order your HotPurge® Systems for working with bends in the pipework then the dimensions will be greater.
4. Can Argweld® HotPurge® Systems be used for'return bends'?
Yes, as long as you make it clear at your enquiry stage, that you will be pulling the HotPurge® Systems through bends, then we can adjust the Systems accordingly.
5. Are Argweld® HotPurge® Systems re-usable?
You should be able to use your Systems for many heat treated weld joints as long as it is used within its specification and hasn’t been damaged.
6. What gases can I use with Argweld® HotPurge® Systems?
These Systems are intended to be used with totally inert argon gas of at least 99.995% purity. It is very important that the System is placed within the pipe prior to heating and that the purge gas is turned on at the beginning of the heat treating cycles and remains on until the units are deflated and withdrawn at the end of the PWHT cycle.
7. What are Argweld® HotPurge® Systems made from?
HotPurge® Systems are fabricated from high temperature resistant materials.
8. How cost-effective are Argweld® HotPurge®?
Using localised purging will save a lot of money in inert gas costs, by not having to purge whole pipe Systems and not having to pay for the cost of extra waiting time.
9. Are Argweld® HotPurge® Systems resistant to heat?
The materials selected for HotPurge® manufacture are resistant to the temperatures that are expected during the heat treatment of chrome steels for weld joint manufacture.
10. How do I measure the residual oxygen content?
HFT® manufactures a range of Weld Purge Monitors®. The PurgEye® 100 IP65 is the best general purpose Weld Purge Monitor® on the market today. If you need to purge down to oxygen levels less than 100 ppm, then the PurgEye® 200 IP65 or any of the others in the range will be suitable as they all measure very accurately down to 10 ppm.
11. How do I position the product in the pipeline?
There are pull loops that each have up to a 1,000lb breaking strain. These can be connected to pull wires that will pull the HotPurge® System from joint to joint.
12. How long will HotPurge® Systems remain inflated?
HotPurge® Systems remain inflated until the purge gas hose is detached.
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Read MoreShipping Information, Weights and Dimensions
Customs Tariff:
| European Customs Tariff: | 4016 9500 |
| International Customs Tariff: | 4016 999 0900 |
| United States Customs Tariff: | 8515 90 2000 |
| Canada Customs Tariff: | 8515 90 2000 |
Product Codes and Sizes:
The size of the Argweld® HotPurge® Heat Resistant System to be ordered must correspond with the ID of the pipe to be welded.
Please confirm the internal diameter of the requested system at the time of placing your order.
The operating range for each purging system is ±12 mm of the stated size.
If the Argweld® HotPurge® Heat Resistant Inflatable Pipe Weld Purging Systems are used outside the range, the effectiveness to withstand pre-heat temperatures is reduced.
Large quantities are manufactured in batches and are usually available from stock at all times for immediate delivery.
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Argweld® HotPurge® Heat Resistant Inflatable Pipe Weld Purging Systems
All dimensions are based on the imperial system. Sizes shown in mm are only mathematic conversions of the imperial dimensions and are not intended to represent metric standards.
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HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® HotPurge® |
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152 mm 178 mm 203 mm 229 mm 254 mm 279 mm 305 mm 330 mm 356 mm 381 mm 406 mm 432 mm 457 mm 483 mm 508 mm 533 mm 559 mm 584 mm 610 mm 635 mm 660 mm 686 mm 711 mm 737 mm 762 mm 787 mm 813 mm 838 mm 864 mm 889 mm 914 mm 940 mm 965 mm 991 mm 1016 mm 1041 mm 1067 mm 1075 mm 1118 mm 1143 mm 1168 mm 1194 mm 1219 mm 1245 mm 1270 mm 1295 mm 1321 mm 1346 mm 1372 mm 1397 mm 1422 mm 1448 mm 1473 mm 1499 mm 1524 mm 1549 mm 1575 mm 1600 mm 1626 mm 1651 mm 1676 mm 1702 mm 1727 mm 1753 mm 1778 mm 1803 mm 1829 mm 1854 mm 1880 mm 1905 mm 1930 mm 1956 mm 1981 mm 2007 mm 2032 mm 2057 mm 2083 mm 2108 mm 2134 mm 2159 mm 2184 mm 2210 mm 2235 mm |
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1.4 kg 1.6 kg 1.8 kg 2.0 kg 2.2 kg 2.4 kg 2.5 kg 2.7 kg 2.8 kg 2.9 kg 3.0 kg 3.2 kg 3.3 kg 3.4 kg 3.5 kg 3.7 kg 3.8 kg 3.9 kg 4.0 kg 4.2 kg 4.5 kg 4.8 kg 5.1 kg 5.3 kg 5.7 kg 6.0 kg 6.2 kg 6.6 kg 7.1 kg 7.5 kg 8.0 kg 8.6 kg 9.3 kg 10.0 kg 10.8 kg 11.6 kg 12.2 kg 12.9 kg 13.8 kg 14.7 kg 15.5 kg 16.3 kg 17.1 kg 17.9 kg 18.7 kg 19.5 kg 20.3 kg 21.1 kg 21.9 kg 22.7 kg 23.5 kg 24.3 kg 25.1 kg 25.9 kg 26.7 kg 27.5 kg 28.3 kg 29.1 kg 29.9 kg 30.7 kg 31.5 kg 32.3 kg 33.1 kg 33.9 kg 34.7 kg 35.5 kg 36.3 kg 37.1 kg 37.9 kg 38.7 kg 39.5 kg 40.3 kg 41.1 kg 41.9 kg 42.7 kg 43.5 kg 44.3 kg 45.1 kg 45.9 kg 46.7 kg 47.5 kg 48.3 kg 49.1 kg |
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Argweld® HotPurge® Heat Resistant Inflatable Pipe Weld Purging Systems User Instructions Technical Manual
Argweld® HotPurge® Heat Resistant Inflatable Pipe Weld Purging Systems User List Customer Reference
Argweld® HotPurge® Heat Resistant Inflatable Pipe Weld Purging Systems Material Safety Data Sheet MSDS
Argweld® HotPurge® Heat Resistant Inflatable Pipe Weld Purging Systems Technical Notes
Argweld® HotPurge® Heat Resistant Inflatable Pipe Weld Purging Systems Certificate of Conformity
Argweld® HotPurge® Heat Resistant Inflatable Pipe Weld Purging Systems Price List
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