Western Railway Tender

Supply and laying of DWC pipe, 75 mm diameter - The price shall cover for supply of Double Wall Corrugated (DWC) HDPE pipe of 75 mm diameter. DWC HDPE pipe shall have corrugation on outer wall but inner wall shall be plain conforming to IS: 14930 Part I and II amended from time to time. The pipes shall be "ISI" marked. Accessories like HDPE snap fit coupler with neoprene 'O' ring shall be part of supply to make the joints 4 water/damp proof. The strength and stiffness class of the pipe shall be SN4 and SN8 respectively. The price shall also cover for laying the DWC pipes in the ground below the tracks/road by push through method at a depth below the formation level as indicated in the drawing supplied by railway. The term "formation" level means the earth surface just below the bedding of the ballast. In case of any hard/stony soil, contractor should adopt new technology method in push through method. Each length of the pipes shall be joined together properly using proper size of socket and aligned in a straight line, keeping an inclination to facilitate the draining of water.

Providing uPVC pipe, 50 mm diameter - The price shall cover for supply of uPVC pipe of 50 mm nominal bore diameter and working pressure of 14 kg/sq. cm along with coupling, elbow, tee etc. for protection of cable. The upright cable shall be encased in uPVC pipes for mechanical protection. The pipe shall be clamped 5 with flat MS clamp at each location on upright cable length. uPVC Pipe shall be as per ASTM-D: 1785, Sch-80 of PARIXIT/SWASTIK/ASHIRWAD/ASTRAL/DOLPHIN/POLYTECH/DUKE/FALCON make. The price shall also cover for laying the uPVC pipes in ground/road and under the track by digging open trench method. Each length of the pipes shall be joined together using proper size of uPVC coupler and properly aligned in a straight line, keeping an inclination to facilitate the draining of water.

Laying of cable in trench - The price shall cover for laying, testing and commissioning of LTUG armoured cable in existing trench/pipe and its connection at both ends. The cable shall be tested with 500 Volt 6 Megger earth tester before laying it in the trench. The cable cores shall be tested for continuity, absence of cross phasing, Insulation Resistance between conductors to earth/armour and between conductors. The results should be recorded in presence of railways' representative. A composite cable layout plan on ferro-print or computerized print duly laminated in A-4 size should be submitted by the contractor to this office as well as site in-charge after laying of cable. Cables shall be supplied by railways at site engineer's stores.

Supply, fixing, testing and commissioning of 5.0-meter height G.I. Street light octagonal pole, single arm complete with all accessories and foundation - The price shall cover for supply, erection and commissioning of 5.0-meter height single arm, G.I. Street light octagonal pole as per the below mentioned specifications. G.I. 7 Octagonal pole of 5.0-meter height, Top - 70 mm diameter, Bottom - 130 mm diameter and 3 mm thickness sheet. Base plate of minimum dimension 200 x 200 x 12 mm, foundation bolts (4 Nos with 3 Nos of nuts and washers in each), single arm bracket for mounting the light fittings, Bakelite sheet with one MCB SP, 6 Amp and 16 sq mm stud type connector (4 Nos) inside the pole at door opening for cable connection, common templates minimum for 15 poles. Detailed specifications of Galvanized Octagonal poles are given in Annexure-XX of tender document.

Providing GI earthing strip, 25 x 4 mm with PVC sleeve - The price shall cover for supply and laying 8 of G.I. earthing strip of 25 x 4 mm size covered with black coloured PVC sleeve of superior quality from earth pit to control/distribution panel board. The earthing strip when laid on wall shall be fixed by means of suitable size of GI clamps and screws.

Providing maintenance free earthing - The price shall cover for providing maintenance free earthing as per the following specifications - 1. High tensile-low carbon steel rod having diameter not less than 17 mm complying with requirements of BS 4360 Grade 43A or EN10025:2-004 S275JR, molecularly bonded by 9 99.99% pure high conductivity copper on outer surface with copper coating thickness of 250 micron or more, Length 3000 mm (minimum). Certificates from NABL approved labs shall be submitted with test results. 2. Copper earth bus-bar of size 250 mm x 50 mm x 6 mm having electrical conductivity of 101% IACS, minimum 99.9% copper content shall be exothermically welded to rod with 4 holes of 12 mm diameter (two on each side) for connecting earthing conductor. 3. Earth Enhancement compound should have characteristics as mentioned in the RDSO specifications. It should have low resistivity preferably below 0.2 Ohm-meter, supplied in sealed bags (minimum 75 kg per pit for 5' x 5' x 10' size pit and minimum 50 kg per pit for 300 mm bore type pit. The bags shall be marked with manufacturer's name or trade name, quality, Batch No. and date of manufacture. Certificates from NABL approved labs shall be submitted with test results, for at least following parameters - i) Composition of Earth Enhancement compound ii) Resistivity - < 2 Ohm-meter iii) pH value - > 7 but < 9 iv) Moisture retaining capacity - > 10% at 105 degrees Celsius v) Water solubility - < 5% 4. Backfill material - Good quality soil or excavated soil free from sand, gravel and stones shall be used for backfilling. 5. Earth pit of size 5 feet x 5 feet x 10 feet or min 300 mm bore up to 10 feet using earth auger shall be made. 6. Inspection chamber - A concrete box of 300 x 300 x 300 mm (inside dimensions) and 50 mm thickness of wall, with smooth cement plaster finish shall be provided on the top of the pit. A concrete lid, painted black, approximately 50 mm thick with pulling hooks shall be provided to cover the earth pit. PVC sleeve shall be provided in concrete wall to take out earthing connections. 7. On backside of the cover, date of the testing and average resistance value shall be written with yellow paint on black background. 8. Instead of copper bus-bar and strips mentioned in the drawing, a GI main bus-bar of minimum size 300 mm x 75 mm x 8 mm to be installed on nearby wall etc. It shall be connected to earthing with two GI strips of 50 mm x 6 mm size each, up to a distance of 10 meters from earth bus-bar (minimum 3 meters x 2 Nos GI strips to be supplied). 9. Earthing shall generally be carried out in accordance with the requirement of I.E. Rules, 1956, as amended from time to time and shall confirm to IS: 3043 of 1987 with latest amendment. 10. The earth value shall be measured and recorded at the site by painting on earth pit or nearest wall along with date of testing. It shall be less than 2 Ohms and neutral to earth voltage shall be less than 3 Volt. 11. Earthing performance after a year of installation shall be jointly checked and measured. It should be less than 2 Ohm. 12. General arrangement of the earth system shall be as per drawing given in Annexure-XX of tender document.

Providing LED Street light luminaries of 45 Watt, ± 10% complete with all accessories - The price shall cover for supply of 45-Watt (±10%) LED Street Light fitting made from pressure die-cast LM6/ADC12/LM24 housing with optimal heat sink for better thermal dissipation and toughened glass or UV stabilized polycarbonate cover with high transmission index for superior light output. The fitting shall be as per Western Railways' specification no. WR/CCG/Specification/P/001 (Rev-01)-2018 of reputed quality and make. The fitting shall be designed for IP: 65 class protection for pole/bracket mounting. The fitting shall be provided with special moisture 1 proof vent. The fitting shall be of reputed quality and make. The price shall also cover for fixing, testing and commissioning of the above street light fitting on pole/truss/roof/wall by fabrication and supply of 'B' class G.I. pipe of required length, diameter and shape and fixed with M.S. clamps made from M.S. flat of 40 x 5 mm size duly painted with nut, bolts and washers of 12 mm diameter. The connection shall be carried out through ISI marked, PVC insulated, flexible three-core copper wire of size 24/0.20 mm from the existing overhead line/catenary/junction box as per site conditions. The connection cord shall be protected by suitable size of heavy-duty flexible PVC conduit. Removal of existing fittings along with pipe and clamps and handing over the same to the site in-charge is included in the scope of work.