The
ARGWELD® 'Purge Bladder
System' has a number of distinct advantages leading to big cost savings.
Uses less inert gas
The volume to be purged is localized. 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 bladders inflate instantly. The purging time is a
fraction of that required to purge by conventional methods.
Easy to use 'Purge Bladders' greatly simplify the process of
inert gas purging.
Training is minimal
leading to bright, shiny, coke and oxide-free welds very quickly.
Improved quality of weld
The process involved is highly reliable. It gives regular, controlled high
quality results.
Fast payback
The ARGWELD® 'Purge Bladder System' pays for itself in just a few
welds.
High quality circumferential butt welding
of 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 system devised for this is the
ARGWELD® "Purge Bladder 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® "Purge
Bladders" are based on a simple idea. Two protected bladders are connected
by a spinal tube.
The tube carries the gas to inflate the
bladders and the release valve to purge the space between them.
The system is inserted into the bore
with one bladder either side of the weld joint.
The bladders 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 bladders expelling the
air.
Welding can then be carried out, the
inert gas ensuring a clean even penetration bead.
Afterwards, the bladders are deflated
and the device easily removed.
This uniquely designed system means
that only one inlet is required for both bladder 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 bladders and purge
the interspaces simultaneously every time.
