Weld Purging for Closing Welds
Weld Purging a variety of pipes of different diameters can prove
complex and costly, particularly when having to fill whole pipework
systems with expensive argon gas.
One solution that welders have traditionally
devised has been to construct homemade foam
or paper dams that are placed either side of the
weld, constricting the purge volume to make
weld purging times shorter.
Homemade foam or paper purge dams have severe
technical limitations that can lead to loss of welds
when they leak or slip from position thus flooding
the welding zone with oxygen.
To overcome these challenges Weld Purging Experts
Huntingdon Fusion Techniques HFT® have designed
and developed Argweld® Weld Purge Film® Kits to
make weld purging affordable and successful.
Georgia Gascoyne, CEO for HFT® said: “Using our
low cost Weld Purge Film® Kits can save welders
both time and money, ensuring oxide-free welds are
achieved time and time again.”
12 TUBE NEWS September 2017
“This water-soluble Weld Purge Film® allows dams to
be cut easily with the safety knife provided and once
they are fixed into position using the water-soluble
Weld Purge Super Adhesive® provided, produce an
impenetrable purge barrier that can easily be washed
away during hydrostatic testing of the pipe or just by
normal wash-out.”
Weld Purge Film® Kits can be used on pipe diameters
up to 900 mm (36”) and for temperatures up to
300ºC (572ºF) without the material burning and
losing the weld purge.
These low cost Kits will save operators high costs
by minimising gas usage and dramatically reducing
the time taken to make a purge. Weld Purge
Film® Kits have been designed and developed by
HFT®, containing product accessories needed to
manufacture dams that will not come loose during
welding.