For some time, Arnway Ltd has been engaged in repairs for the Cement Industry, specialising
in weld repairs in- situ to items such as kiln tyres, kiln rollers, mill shells and
mill trunnions. All such repairs have been 100% successful, resulting in major downtime
savings compared with the alternatives on offer. A recent repair in Ireland was
carried out in co-operation with the OEM, a world leader in the cement industry,
of Copenhagen, Denmark. The repair consisted of a through-thickness (350mm) defect
in the No. 1 tyre across the full width of 650mm. According to calculations, we were
able to save the user 3 days of repair time compared to one recently carried out
by others. We deposited 360kg of weld metal in 7 days.
We have carried out repairs to mill trunnions in-situ, repairing through-thickness
defects in both the bearing area and also the flange radius. No re-occurrence of
the problem has been reported. We carry a standard pack of equipment, reviewed for
completeness according to the particular needs of the job in hand; ready to fly or
freight anywhere. This pack includes full electrical preheat and stress relief gear,
welding and Arc-Air gouging gear and all ancillary and support equipment. The preheat
and stress relief equipment is controlled by a programmer unit, which will control
the temperature to within 10C, removing uncertainty over welding in exposed areas.
Typically, we control the temperature at both sides of a completely separated excavation,
in order to minimise the risk of unequal expansion as a result of the preheat being
applied; and therefore shear stress being applied to the repair when cooled.
We have worked all over the world, and can mobilise in a matter of hours. We are
Research Members of The Welding Institute of Cambridge (TWI) and as such, we have
unrivalled backup from metallurgical and fatigue design points of view.
ARNWAY - A COMPLETE REPAIR SERVICE FOR THE CEMENT INDUSTRY