Argweld® Pipe Purging System for 2-12 Inch Pipework0 pages

ARGWELD®
PIPE PURGING SYSTEMS
FOR 2-12 INCH PIPEWORK
High quality circumferential butt welding of tube to tube,
pipe to pipe and pipe to fitting requires inert gas to be
used inside the bore to prevent oxidation and notching of
the root penetration weld bead.
The best systems devised for this are the Argweld® Pipe
Purging Systems. They are quick, reliable and easy to use.
The volume to purge is kept small, resulting in signif.icant
savings in both time and the cost of inert gas used.
The Argweld® Pipe Purging Systems are based on a simple
idea. It comprises two protected inflatable dams connected
by a spinal tube.
The tube carries the gas to inflate the dams and to open
the release valve to purge the space between the dams.
The selected system is inserted into the bore of the pipe
or tube to be welded 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. Welding can then be carried out, the inert gas ensuring
a clean even penetration bead. Afterwards, the dams are
deflated 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 litres/minute.
The relief valve can be set to inflate the dams and purge
the interspace simultaneously every time.
Compared to other methods of gas purging for pipe
welding, the Argweld® Pipe Purging System has a number
of distinct advantages leading to big cost savings.
• Uses 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.
• Faster
The system is very quick and easy to install. It
can be positioned accurately and the dams inflate
instantly. The purging time is a fraction of that required
to purge by conventional methods.
• Easy to use
Argweld® Pipe Purge Systems greatly simplify the
process of inert gas purging. Training is minimal,
leading to bright shiny welds very quickly.
• Improved quality of welds
The process involved is highly reliable. It gives
regular, controlled high quality results.
• Fast pay back
The Argweld® Pipe Purging System pays for itself
in just a few welds.