of backing tape that can
be used in the welding of large diameter steel pipes and vessels, as well
as flat sheet. Argweld comprises a 75mm wide strip of heat resistant
adhesive aluminium foil down the centre of which is a 25mm wide band of
woven glass fibre cloth. A lightweight grade for welding up to 80A comes
in 25m lengths and the heavy duty version for 160A welding comes in 12.5m
rolls. The weld metal is cast on the glass fibre tape, leaving a flat,
pore- and crevice-free weld. which requires the minimum of cleaning.