The Argweld® Inflatable Pipe Purge System is based on a simple idea. Two protected inflatable dams are connected by a spinal tube. The tube carries the gas to inflate the dams and the valve to purge the interspace. The system is inserted into the bore with one dam either side of the weld joint. The dams are inflated to form a seal, after which the pressure in the system opens the purge valve, the inert gas is then fed into the space between the dams expelling the air through the integral exhaust tubes. Welding can then be carried out, the inert gas ensuring a clean even penetration bead.

Afterwords, the dams are deflated simply by disconnecting the purge gas feed and the device easily removed.

This uniquely designed system means that only one inlet is required for both dam inflation and introduction of the purge gas. The relief valve can be set to work at any desired flow up to 20 liters/minute and can be set to inflate the dams and purge the interspace simultaneously every time.

The Argweld® Inflatable Pipe Purge Systems have distinct advantages leading to significant cost savings:

Use Less Inert Gas
The volume to be purged is localised. For a typical pipe run, the volume of gas used is less than 2% of that required for a conventional purge thus providing important financial savings.

Faster
The system is quick + easy to install. It can be positioned accurately and the dams inflate instantly. Purging time is a fraction of that required to purge by conventional methods in this case leading to an important savings in the cost of waiting.

Improved Quality of Welds
Leading to bright, shiny, coke and oxide-free welds very quickly. The process involved is highly reliable. It gives regular, controlled high quality results.

Easy to Use
Argweld® 'Inflatable Pipe Purge Systems' simplify the process of inert gas purging.

Fast Payback
The Argweld® 'Inflatable Pipe Purge System' pays for itself in just a few welds.

 

Highest Standards
We manufacture to Nuclear Quality with Nuclear approved materials. High quality circumferential butt welding of tube to tube/fitting, pipe to pipe/fitting requires inert gas to be used inside the bore to prevent oxidation and notching of the root penetration weld bead. The best system devised for this is the Argweld® Inflatable Pipe Purge System. It is quick, reliable and easy to use, the volume of purging required is kept small, resulting in significant savings in both time and the volume of inert gas used.

The Argweld® system has the flexibility of additional gas inlets / exhausts to accommodate high flow rates of purging gases.

 

 

Argweld® 2-12 inch Pipe Purging System