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SYSTEM OPERATION
Correct installation and use of the system will ensure clean, good
and even penetration beads on all pipe joints. By localising the
volume to be purged, savings can be made on waiting time and
shielding gas costs and productivity will increase.
The Argweld
®
Pipe Weld Purging System comprises two inflatable
lightweight polyurethane coated nylon covered dams, connected by
a protected spinal tube which is covered in a low vapour pressure
synthetic material to prevent scratches on the inside of polished
tubes or pipes.
The length of the spinal tube may vary according to purge dam
diameter but can be specially changed if the application requires.
The Argweld
®
Multi Exhaust™ System has 3 additional inlet/exhaust
ports for applications requiring larger volumes of purge gas such as
titanium welding. Plugs are provided for those ports that are not
required for use.
When an extra purge gas line is connected, the additional exhaust
ports will allow the extra purge gas to escape without over
pressurising the weld pool.
Each Argweld
®
Multi Exhaust™ System is designed for one nominal
pipe size and all internal diameters of that nominal size (for example,
the 4
inch
dam is designed for 4
"
schedule 10 to schedule 160 sizes).
If the device is used in smaller pipes, it may crease and let air in,
resulting in a contaminated weld.
If the operator attempts to use a device in a larger pipe than it was
manufactured for, it will not function. Each device must be used at
the flow rate recommended otherwise it will not function correctly.
