Eskom Holdings SOC Ltd (hereinafter “Eskom”) invites you to submit a tender for the following: Inspection and repairs of ducting on units 1, 2, 4, 5 and 6 during planned outages for Duvha Power Station. The scope of modification is as follows: • Full inspection and submit report; • Grease bearings and ball joints on links; • Remove bearing stuffing box cover, clean shaft, repack & box up bearing stuffing box; • Fit new packing on all ducting inspection doors; • Replace flue gas damper doors, shafts, shaft pins, frames, divisional plates, bottom supports, 30mm square bars, 80 x 6mm seals on doors, bearings, links including mechanical settings after replacements. Doors to be collected from the stores by the contractor; • Replace all 30mm square bar sealing strips on flue gas damper; • Replace all 80 x 6mm seals on the flue gas damper doors; • Mechanical, electrical stroke checking and settings of all dampers; • Clean all debris and ash pile up within the ducting including FD fan intake screens using plastic bags; • Cut access Holes and install handrails around the holes 2500 x 1500 meters, replace after completion of internal work; • Open access doors; • Replace 6mm - 10mm thick eroded plate by welding new; • Replace 12mm - 16mm thick eroded plate by welding new; • Repair grease pipes & nipples; • Close access doors; • Vertical weld repairs on 6 - 10mm plate; • Vertical weld repairs on 12 - 16mm plate; • Horizontal weld repairs on 6 - 10mm plate; • Horizontal weld repairs on 12 - 16mm plate; • Replace bearings; • Replace 80 x 80mm angle iron Stiffeners; • Replace 100 x 50mm channels in front of doors, position of channel to be in line with 100% open door position; • Replace 100, 120, 250, 300mm x 6mm protection plates; • Replace 80Nb stays with 100 x 10mm protection (protection plate), Unit 1, 2, 4, 5 and 6 vanes: • Replace 1650 x 520 x 6mm deflector vanes and 1650 x 25 x 10mm flat bar protection (Top); • Replace 1500 x 260 x 6mm deflector vanes (middle); • Replace 1645 x 480 x 6mm deflector vanes (bottom); • Replace 1650 x 25 x 10mm deflector vanes (top). Economiser outlet to A/H inlet: • Replace 6mm-10mm thick eroded plate by welding new; • Replace 10mm-16mm thick eroded plate by welding new; • To fit 196 50mm socket and plugs; • Deflector plate 1200 x 2500mm; • Repair 25 x 10mm Dividing walls protection; • Replace round bar on ducting access ladders; • Remove and replace 16mm, 25mm round stainless steel thermocouples pockets with protection; • Replace 80 x 6mm seals on the flue gas damper; • Replace 35mm square bar sealing strips on the flue gas dampers; • Fit new packing; • Cut and replace 60 x 6mm wide expansion joint sections; • Attach chains and damps to hanger rods; • Replace cell inlet damper stainless steel seals; • Replace cell inlet damper 40 x 40 x 6mm angle iron; • Replace 120 x 75mm round shaft on the flue gas damper. (Tender №104488295)