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Tenders are invited for Rehabilitation and Upgrading of Existing Water Supply Systems in Waaberi Health Facility, Buurhakaba Town Earth work : Excavation and Backfilling 1.1 Excavate pipe trenches for the installation of OD 63 mm (2-inch) uPVC pressure pipe along the approved route from the existing elevated water tank to Waaberi Health Facility. The trench shall be approximately 0.40 m wide and 0.50 m deep, with a total length of approximately 1,600 metres. The rate shall include setting out, excavation in all soil types, trimming and levelling of the trench bottom, backfilling with selected and approved material around and above the pipe, proper compaction in layers, disposal of surplus excavated material, and reinstatement of the surface. All works shall be carried out in accordance with the approved drawings, technical specifications, manufacturers recommendations, and to the satisfaction of the supervising Engineer. M³ 320 1.2 Clay Bedding : Supply transport and spread 10cm thick approved Clay in the bottom, top and around the laying pipe to minimize external damages. (1600*0.1*0.4=124) M³ 64 2 PIPE WORK 2.1 Distibution Pipe to Waaberi H.F 2.1.1 Supply, deliver and install 63 mm OD (2-inch) uPVC pressure pipe, PN15, SDR approximately 13, with nominal wall thickness approximately 4.8 mm, in 6 m lengths, complying with ISO 1452-2, suitable for pressurised potable-water supply, along the route from the existing elevated water tank to Waberi Health Facility, including all approved compatible jointing materials and fittings, handling, cutting, alignment, jointing, pressure testing, flushing and commissioning, complete in all respects, including transportation and delivery to Buurhakaba. (Fittings;Elbow=50pcs, Valves=4pcs, 4-T Joints, Pipe coipling/Sleeve=8Pcs) Sno. Item Description Unit Quantity Unit Rate Total in USD 1 Solar panel: Supply, deliver, install, test and commission 550 W monocrystalline solar PV modules, 50 Nos. (27.5 kWp total), with Vmp: 40.87 V, Imp: 9.79 A, Voc: 49.21 V, Isc: 10.92 A, and power tolerance of ±5%. The system shall include all necessary electrical interconnections using UV-resistant solar cables, MC4 connectors, grounding and associated accessories. Panels shall be arranged in series/parallel strings matched to the approved solar pump inverters MPPT operating-voltage and maximum DC input limits.. Pcs 50 2 Solar Pump Inverter/Controller: Supply, deliver, install, test, and commission a minimum 15 kW, 380/400 V, 3-phase, 50 Hz solar pump inverter/controller, with MPPT and variable-frequency drive, compatible with the 27.5 kWp PV array and proposed submersible pump, including all required control and protection functions. No 1 3 Solar Panel Support Mounting Structure: Supply and install a complete solar PV support structure constructed from steel frames in accordance with the approved design, suitable for 50 PV modules. Main mounting poles shall be 80 mm × 80 mm × 5 mm square steel tubes, diagonal/bracing members 50 mm × 50 mm × 5 mm square tubes, and purlins 50 mm × 50 mm × 3 mm square tubes. The structure shall be approximately 2.0 m above finished ground level to mitigate flood risk, with suitable slope for drainage and optimal solar orientation. Poles shall be embedded in concrete foundations with a minimum 400 mm below-ground depth and 250 mm above-ground level, or as approved by the technical team. Provide minimum 1.0 m spacing between panel rows and approximately 1.0 m perimeter clearance for maintenance. Rate shall include steel fabrication, welding, cutting, drilling, concrete foundations, reinforcement, bolts, clamps, labour, installation and all accessories. All exposed steelwork shall be protected with anti-rust primer and silver metallic finishing paint. Lot 1 4 DC/AC Protection and Isolation: Supply and install complete electrical protection and isolation, including DC combiner/protection box, DC isolators, fuses/breakers, AC protection, surge protection devices and enclosures, appropriately rated for the PV array, inverter and pump. Lot 1 5 Pump and Electrical Cables: Supply and install all required appropriately sized DC solar cables, AC pump power cables, connectors, glands, lugs, conduits/cable protection and termination accessories required for a complete and operational system. M 200 6 Manual Changeover/Bypass: Supply, install, test and commission a 4-pole, 63 A minimum, 400 V AC, 3-phase, 50 Hz, I-0-II manual changeover switch, mechanically interlocked and break-before-make, for safe selection between the solar pump inverter and existing generator supply. The switch shall simultaneously switch L1, L2, L3 and Neutral, prevent parallel connection of the two power sources, and include a lockable IP65 enclosure, terminals, cable glands, labels and all accessories required for complete installation and commissioning No 1 7 Installation accessories (Surge protector, Lightning Arrestors, Eath , Cables from the shallows to the Solar site ).There is also the adjustment of all wires from the solar system. To avoid damaging the ground soil, run the ground wires through a 1/2-inch-thick PVC pipe. LS 1 8 Transportation of Equipment to the Sites in Buurhakaba Ls 1 9 Provide metallic billboard of size 1.5x2m, Paint and label Oxfam and Donors logos. Also indicate detail project description. Oxfam team will provide the information. LS 1 Total Cost for supply and installation of One Solar system 1 Total Cost for supply and installation of Two Solar system 2 10 Supply, installation, testing and commissioning of an 11 kW (15 HP), 3-phase, 50 Hz submersible pump for horizontal installation at the dam, complete with all necessary fittings, accessories, and dry-run protection to prevent pump operation under insufficient water conditions. The pump shall deliver approximately 13 m³/h at a head of 175279 m. Submit the manufacturers datasheet and performance curve for approval prior to supply. No 1 Tender Link : https://somalijobs.com/tenders
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