NATIONAL ALUMINIUM COMPANY LIMITED - Rites

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17.3 SCOPE gain into the room, adequate no. of air changes etc. to maintain a uniform temperature and relative humidity within the air conditioned areas. 17.3.1 Mechanical Ventilation System The ventilation system generally consisting of adequate number of supply and exhaust air fans, air filters, ducting along with 3 phase AC motor drives, electricals, supporting structures, approach/maintenance platforms, civil and structural works and necessary accessories shall be furnished for ventilating the WT hopper, underground portion of transfer points, underground conveyor tunnel tunnels s and pent houses. Exhaust fans shall be provided for Toilets & Battery rooms. 17.3.2 Pressurised Mechanical Ventilation System The ventilation system generally consisting of adequate number of supply and exhaust fans, metallic pre filters, HDPE fine fi filters, lters, ducting along with 3 phase AC motor drives, electricals, supporting structures, approach / maintenance platforms, necessary shed, civil & structural works and necessary accessories shall be furnished for all MCC/switchgear rooms. 17.3.3 Air Conditioning ioning System 17.3.4 2x100% capacity air conditioning units shall be provided for Wagon Tippler Control Room. 17.3.5 Supply and return air distribution ducting complete with insulation, of resin bonded mineral wool equivalent of density at least 24 Kg/m Kg/m³ ³ and thermal conductivity of max. 0.49 mw/cm°C conforming to IS:8183 including supporting structures, approach/ maintenance platforms, civil and structural works and necessary accessories shall be provided. 17.3.6 Air cooled PAC shall be provided provided. 17.3.7 Area around centrifugal fans, filters, motor foundation shall be paved to have a clear surrounding. 17.4 Codes & Standards The design, manufacture, inspection and testing of Ventilation & A/C System shall comply with all the currently applicable statutes, regulations and safety codes in the locality where the equipment is to be installed. The Ventilation & A/C System shall conform to the latest edition of the following standards and codes. Other internationally acceptable standards/codes, which eensure nsure equal or higher performance than those specified, shall also be accepted. Nothing in this specification shall be construed to relieve the contractor of the required statutory responsibility. In case of any conflict in the standard and this specification, ion, the decision of the Owner Owner/RITES shall be final and binding. • IS:3588 : Specification for electrical axial flow fans. Technical Specification:Sec-4,System System Parameters, Operation & Control Philosophy Page 47 of 64
• IS:2312 :Propeller type AC Ventilation fans • IS:3963 :Specification for roof roof-extractor units • IS:4894 :Centrifugal Fans • IS:655 :Specification ation for Metal Air Duct • ARI:210 :Standard for Unitary air conditioning equipment. • ARI:270 :Standard for application, installation and servicing of unitary equipment. • IS:8183 :Specification for bonded mineral wool. • IS:661 :Thermal insulation for cold surfa surfaces. • IS:4671:Expanded polystyrene for thermal insulation purpose. • IS:8148 :Packaged Air conditioners. 17.5 DESIGN REQUIREMENT 17.5.1 Roof Ventilators & Accessories 17.5.2 Roof ventilators & accessories shall be provided as required. Impeller shall be axial flow type. 17.5.3 Design duty point of the fan shall match with the average value of maximum and minimum flow rates of the fan in stable operation zone. 17.5.4 The speed of the roof ventilators shall not exceed 960 rpm for ventilators with impeller diameter above 450 mm & 1440 rpm for ventilators with impeller diameter 450 mm and less. The first critical speed of rotating assembly shall be at least 25% above operating speed. 17.5.5 Motor shall be totally enclosed type suitable for vertical mounting mounting. . Motors shall comply with the companion electrical specifications. 17.5.6 Axial Fans 17.5.7 Design duty point of the fan shall match with the average value of maximum and minimum flow rates of the fan in the stable operation zone. The speed of the fan shall not exceed 960 rpm for fan with impeller diameter above 450 mm and 1440 rpm for fan with impeller diameter 450 mm and less. The first critical speed of rotating assembly shall be at least 25% above operating speed. 17.5.8 Impellers shall be axial flow low type single piece. 17.5.9 Centrifugal Fans 17.5.10 The fan units shall be centrifugal type with radial bladed impeller. For design purpose out door ambient temperature shall be taken as 50 deg.C. 17.5.11 Fans shall be manufactured vibration free in operation and shall be designed to limit noise level within limits specified in Data Sheet. 17.5.12 The motor shall be rated for continuous operation and conform to companion electrical specification. However, motor rating shall not be less than the m mmax. power demand throughout the entire range of operation of fan. Technical Specification:Sec-4,System System Parameters, Operation & Control Philosophy Page 48 of 64
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NATIONAL ALUMINIUM COMPANY LIMITED
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1.0 GENERAL M/S. National Aluminium
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It is conveyed to the storage Yard
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existing conveyor BC-104. 104. Coal
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provided sufficient information is
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Equipment and services covered unde
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elow wagon tippler hopper including
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3.1.24 First fill of all consumable
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galleries, trestles, penthouses, Wa
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Apron feeder will feed coal unloade
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The LD shall be assessed on the bas
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13.0 START-UP UP & COMMISSIONING SP
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1.1. GENERAL Technical Specificatio
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1.1.16 The offer shall be complete
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The supply of conveyor galleries, t
Page 31 and 32: 1.2.15 Installation stallation and
Page 33 and 34: After erection, the damaged portion
Page 35 and 36: • Supply of all commissioning spa
Page 37 and 38: (b) Guaranteed (rated) capacity: 12
Page 39 and 40: • Guideline for wagon tipplers is
Page 41 and 42: is activated, all conveyors will al
Page 43 and 44: Wagon Tippler a). Motor O/L - not t
Page 45 and 46: linking while the faulty conveyor /
Page 47 and 48: automatic controls for positioning,
Page 49 and 50: platform with a minimum accuracy of
Page 51 and 52: A. Wagon Tippler Hopper Constructio
Page 53 and 54: 8.4.3 The arm shall be raised and l
Page 55 and 56: 10.5 DATA SHEET Capacity (TPH) : 15
Page 57 and 58: 12.4 DATA SHEET: DRIVE EQUIPMENT GE
Page 59 and 60: Nos (Total 4 Nos in the Crane ffor
Page 61 and 62: lifted over/by the side of other eq
Page 63 and 64: 14.3.3 Trolley wheels shall be of s
Page 65 and 66: 15.2.3 Transfer chutes shall be ade
Page 67 and 68: shall be placed internal to the dri
Page 69 and 70: 2.3.4 Manual Operation (a) (b) 2.3.
Page 71 and 72: supports, pumps, tanks, etc. as req
Page 73 and 74: a. Pump casing may be axially or ra
Page 75 and 76: (i) Base plates together with found
Page 77 and 78: impregnated tar felt. The lap joint
Page 79 and 80: 3.3.0 Pipings & Fittings 3.3.1 Join
Page 81: (j) Y Strainer 17.0 VENTILATION SYS
Page 85 and 86: 17.5.22 Condenser capacity control
Page 87 and 88: The media of the filter shall be ma
Page 89 and 90: 2.4.5 Condenser: Air cooled type 2.
Page 91 and 92: ) Suitable access staircase with sa
Page 93 and 94: 18.3 ADDITIONAL DESIGN CRITERIA a)
Page 95 and 96: i) Gallery Trusses Span / 400 ii) T
Page 97 and 98: i) Removal of bends, kinks, twists,
Page 99 and 100: shall not be done in foggy weather.
Page 101 and 102: i. Pollution n Control Regulations
Page 103 and 104: i) Procedure for initial checking a
Page 105 and 106: (k.) All manufacturing, fabrication
Page 107 and 108: (v.) After final acceptance of indi
Page 109 and 110: y the Engineer shall not relieve th
Page 111 and 112: Each main and auxiliary item of pla
Page 113 and 114: (a) His organisation structure for
Page 115 and 116: 4.12.10 Welding procedure qualifica
Page 117 and 118: (c) Manufacturer / works test repor
Page 119 and 120: make modifications that may be nece
Page 121 and 122: endanger the safe operation of the
Page 123 and 124: The equivalent 'A' weighted sound p
Page 125 and 126: shall be done. In case of junction
Page 127 and 128: ELECTRICS FOR WAGON TIPPLER SYSTEM
Page 129 and 130: 1.5 Safety All equipment shall be c
Page 131 and 132: • Static and dynamic loading of t
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All cables Power cable, Control Cab
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Following power utilization standar
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Ammeter for Wagon Tippler, Apron fe
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• Relay should have heavy duty tr
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Air break, drawout type conforming
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Internal control wiring shall be by
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POTENTIAL TRANSFORMERS 1. Type 2. P
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Where such sealants or adhesives sh
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Specifications for miscellaneous ma
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Two numbers 50 x 6 mm GI flat earth
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Paint shade Phase crossover chamber
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Degree of protection for motor and
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The other technical particula parti
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stress, noise on communication syst
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CTs for back up earth fault (51N) a
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Suitable under-carriage carriage fi
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21. Suitable for parallel operation
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• Sequence module • Zero speed/
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iii) LED status indication iv) BCD
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• The communication subsystem bet
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Static Transfer Switches The static
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9. Continuous load/duration : As pe
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4. A/C & ventilation RRoom 5. Perip
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The LDBs shall be fabricated from C
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The miniature circuit-breakers brea
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Outgoings : MCCB TPN of 32 A : 10 N
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type terminals for taking looping c
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The starter holders shall be of wel
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essentially have a 3 points suspens
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The wall thickness of each section
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While designing the earthing system
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Ring mains LT PCCs/board Control Pa
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Bidder shall include complete elect
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The VCB shall be indoor drawout typ
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front design. The distribution boar
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Encl: IP-45 Control voltage - 220 V
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1. Procedure mentioned in manufactu
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Dispatch clearance shall be given b
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The acceptance test on the system s
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6. Functional test 7. Capacity test
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SN IS Standard with Latest Amendmen
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e prepared in Auto Cad (latest vers
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plates under the conveyor galleries
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specifically called for in drawings
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preferably be not less than 4.5 cut
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12.0 LOADING For consideration of l
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or as directed by the Engineer. The
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slowly to make a Slurry Mix. For pr
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Dado in toilets and pantries shall
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above e the ground except for rail
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All standards, specifications, acts
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1.0 GENERAL 1.1 The following provi
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6.2 Before the Contractor connects
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13.2 The Contractor shall have the
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the site. Illumination of wagon tip
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21.4 The Contractor shall provide e
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(c) The testing schedule sh shall a
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(j) The Contractor shall be respons
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33.0 PAINTING All exposed metal par
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37.4 The Contractor shall provide s
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earing housing shall not exceed for
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Technical Specification:Sec-8l v. C
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All installation procedures shall c
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55928 (Part 4) or BS 4232 or IS 147
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5.0 FINISH PAINTS (F) Finish paint
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SP - Surface preparation quality 2P
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Transformer oil Fuel oil Coke oven/
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LIST OF MANDATORY SPARES A. MECHANI
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6.0 Electric Hoist 7.0 Manual Hoist
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PDB/LDB/SLDB/AUX. PDB LT TRANSFORME
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INFORMATIONS TO BE FURNISHED BY THE
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HYD.POWER PACK DETAILS FOR WT Type
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Excitation voltage Safe overload Ul
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No.of wagon handled by Indexer Oper
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iii) Shaft deflection at hub iv) La
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13. Make, ratings, type of limit sw
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Technical Specification:Sec-9,Misce
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6. Equipment wise List of commissio
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MCC WISE DATA Sl. No RELAYS METERS
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4. Value of earthing resistance (pr
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LIGHTING MAST General 1. Make : 2.
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5.4 Centrifugal Fan a) Make & Model
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j) Shaft power k) Drive details a.
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1.0 FORMAT FOR GENERAL AND COMMERCI
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8.0 LIST OF DRAWINGS ENCLOSED WITH
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D) Fluid Coupling Schedule E) Idler
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In case the Tenderer/ Contractor in
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17 Lighting & Power panels 6. Preci
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47. Signal and Instrumentation 5.KE
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16. 4” dia portable motor operate
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1.0 COMPLETION SCHEDULE Special Ins
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(i) Bids that do not meet the quali
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1.0 COST OF BIDDING 1.1 All direct
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5.2 Any addendum thus issued will b
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discrepancy between the quoted lump
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. GENERAL CONDITIONS OF CONTRACT CO
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. 1.00 APPLICATION Unless otherwise
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. 2.22 `Writing’ shall include an
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. 4.02 For Erection Supervision Ser
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. American Petroleum Institute (API
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. Dimensions of each package shall
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. 11.0 INSURANCE 11.01 The Owner wi
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. c) Drawing submission schedule in
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. Erection schedule giving the sequ
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. premises, the Contractor shall ob
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. (I) Loads at which tests will be
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. 24.02 Completion Certificate With
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. 27.00 MAINTENANCE AND GUARANTEE -
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. have the option and be at liberty
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. him to the Contractor under the c
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. 38.00 PROGRESS REPORTS AND PHOTOG
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. The Purchaser; shall pay the Cont
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. All registration and statutory in
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. During the progress of work the C
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. Before completion of erection, th
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. his own cost for distribution to
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. (iii) Final adjustment of foundat
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. (a) The work procedures that are
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. 44.18 Construction Management (a)
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. 45.00 FOREIGN PERSONNEL 45.01 The
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. For the purpose of appointing the
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. The Contractor shall prepare and
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. waiver of such provisions, rights
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Tender Notice No. - …………...
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IMPORTANT AGREED TERMS & CONDITIONS
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Sl. Descriptions Vendor’s confirm
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Sl. Descriptions Vendor’s confirm
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SL. NO. REFERENCE OF NIT DOCUMENT D
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Tender Notice No. - ……………
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Page 1 of 2 ANNEXURE - VII PROFORMA
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Tender Notice No. - …………. P
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Tender Notice No. - …………..
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1.0 General PACKING, MARKING, SHIPP
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PACKING, MARKING, SHIPPING AND DOCU
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PACKING, MARKING, SHIPPING AND DOCU
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