TWI recently helped Tasman Pulp and Paper develop a clad repair of a corroded pulp digestor. Because of potential caustic cracking, a conventional repair with a thin "wall-papered" layer of stainless steel could not be employed. TWI suggested depositing a band of Inconel 625 weld metal at each end of the clad region. This band was then given a stress relief heat treatment before the stainless steel cladding was welded to the Inconel 625 weld metal. The fitness for service of the repair was checked using a fracture mechanics approach for defect assessment. The local jurisdiction was convinced that the repaired digestors were fit for service, and they are now operating safely. For more information, contact Alan Smith (atsmith@twi.co.uk) of TWI.