Types of drum repairs

1 January 2000

Table 1: Types of drum repairs conducted
Reference Simulated degradation mechanism Test areas Deployed repair scheme
Type A Isolated minor damage, isolated corrosion pits or pinholes Base, body, neck, lifting ring, lid Excavate to sound material, fill with weld and dress flush
Type B Local significant loss of material thickness due to corrosion Base, body, neck, lid Weld patch over area
Type C Cracking or loss of weld material due to corrosion Various body and seam welds Excavate to sound material and replace weld
Type D More widespread loss of material thickness due to corrosion, eg fully circumferential Body Weld over fully-circumferential patching collar
Type E Local significant loss of material thickness due to corrosion/cracking of butt weld Lifting ring Excavate to sound material, fill with weld and grind back to profile



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