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| 1 | Steel Renewal- UW (with degutting & regutting). Renewal of underwater (UW) structural plates (with stiffeners) including degutting of lagging, perforated paneling (approx. 1-2’ clear on all edges on both sides of the structure) and testing of welds by DPT, followed by re-gutting of lagging/ paneling. | Steel Renewal- UW (with degutting & regutting). Renewal of underwater (UW) structural plates (with stiffeners) including degutting of lagging, perforated paneling (approx. 1-2’ clear on all edges on both sides of the structure) and testing of welds by DPT, followed by re-gutting of lagging/ paneling. |
| 2 | Build-up of pits/cracks – UW. Metal build-up of pits/ cracks in underwater hull structures, followed by grinding and DPT. | Build-up of pits/cracks – UW. Metal build-up of pits/ cracks in underwater hull structures, followed by grinding and DPT. |
| 3 | Anodes. Cutting / Welding of Sacrificial Zinc Anodes on Underwater Hull | Anodes. Cutting / Welding of Sacrificial Zinc Anodes on Underwater Hull |
| 4 | Rope guards. Removal and fitment of Rope guards fitted on shaft | Rope guards. Removal and fitment of Rope guards fitted on shaft |
| 5 | Lifting eye hooks- UW/AW. Manufacturing, cutting and welding of Lifting eye hooks on underwater shell plating, with subsequent final cutting and grinding. | Lifting eye hooks- UW/AW. Manufacturing, cutting and welding of Lifting eye hooks on underwater shell plating, with subsequent final cutting and grinding. |
| 6 | Foundations-mfg. & fitment UW. Manufacturing and fitment of foundations on tank tops/underwater compartments | Foundations-mfg. & fitment UW. Manufacturing and fitment of foundations on tank tops/underwater compartments |
| 7 | Foundations-fitment-UW. Fitment of foundations (provided by yard/ SS) on tank tops/underwater compartments | Foundations-fitment-UW. Fitment of foundations (provided by yard/ SS) on tank tops/underwater compartments |
| 8 | Hot Work Assistance. Cutting / Welding/ Heating/ Grinding Assistance in underwater or above-waterline hull structures | Hot Work Assistance. Cutting / Welding/ Heating/ Grinding Assistance in underwater or above-waterline hull structures |
| 9 | Soft Patches. Opening and closing of soft patches, including degutting and regutting with renewed nuts and bolts and breaking of any cold repair compound. | Soft Patches. Opening and closing of soft patches, including degutting and regutting with renewed nuts and bolts and breaking of any cold repair compound. |
| 10 | APT of Underwater Clusters – Machinery compartments. Air Pressure Testing (APT) of underwater compartment clusters including blanking, rectification of associated structural defects. | APT of Underwater Clusters – Machinery compartments. Air Pressure Testing (APT) of underwater compartment clusters including blanking, rectification of associated structural defects. |
| 11 | Pressure Testing. Pressure Testing of Tanks/ Voids/ Cofferdams/ Stern Tubes/ Sonar Domes/ Bilge Keels. Includes repairs/ blanking of manhole covers (with new rubber gaskets/ studs/ bolts as required) and detection / rectification of all structural leaks. Values: 0.2 to 0.4 kg/sq.cm | Pressure Testing. Pressure Testing of Tanks/ Voids/ Cofferdams/ Stern Tubes/ Sonar Domes/ Bilge Keels. Includes repairs/ blanking of manhole covers (with new rubber gaskets/ studs/ bolts as required) and detection / rectification of all structural leaks. Values: 0.2 to 0.4 kg/sq.cm |
| 12 | Radiography Test of welds. Carry out RT of welds | Radiography Test of welds. Carry out RT of welds |
| 13 | Brazing. Brazing assistance in Shop floor/ onboard and testing of repairs by DPT / Pressure Testing | Brazing. Brazing assistance in Shop floor/ onboard and testing of repairs by DPT / Pressure Testing |
| 14 | Titanium welding. TIG welding assistance for Ti/Cu-Ni/silver/Alu.in shop floor / onboard and testing of repairs by DPT / Pressure Testing | Titanium welding. TIG welding assistance for Ti/Cu-Ni/silver/Alu.in shop floor / onboard and testing of repairs by DPT / Pressure Testing |
