NATIONAL ALUMINIUM COMPANY LIMITED - Rites

2.1.3 Maximum Hoisting speed for electric hoists: 6 m/min
2.1.4 Drive Motors: SQIM, Separate for travel & lift
2.1.5 No. of starts for drive motor: 150 starts/hr at 40% CDF
2.1.6 Wire Rope
(i) Type/Construction: Pre Pre-formed formed type, hemp cored, regular lay 6/36 construction
(ii) Breaking Strength: 160 160-175 kgf/sq. mm
2.1.7 Bearing
(i) Type: Ball/Roller bearing
(ii) Life: 20 years
2.1.8 Brake: Electro Mechanical type with asbestos lining.
2.1.9 Load Hook: Swiveling type forged circular shank section.
2.1.10 Duty: Class –2
2.2.0 Monorail location/layout
2.2.1 Cross section I beam
2.2.2 Distance between CC/L
/L of monorail & C.G. of equipment to be lifted Maximum 500
mm
2.2.3 Power Cables Support Festoon type arrangement
2.3.0 Manual Hoists
2.3.1 Maximum manual effort for operation. 30 Kg
15.0 CHUTES AND HOPPERS
15.1 GENERAL
Chutes & Hoppers, flap gates and shall be furnished integral with coal handling system being
supplied. All necessary accessories, electricals etc. shall be provided to ensure proper
flow/storage/bifurcation of coal as per system requirements.
15.1.1 CODES AND STANDARDS
The design, gn, manufacture, inspection and testing of Chutes & Hoppers shall comply with all
the currently applicable statutes, regulations and safety codes in the locality where the
equipment is to be installed. The chutes, hoppers shall conform to the latest editio edition of the
following standards and codes. Other internationally acceptable standards/codes, which
ensure equal or higher performance than those specified, shall also be accepted. Nothing in
this specification shall be construed to relieve the,contractor of tthe
he required statutory
responsibility. In case of any conflict in the standard and this specification, the decision of
the Owner/RITES shall be final and binding.
• IS:4682 :Code of practice for lining of vessels and equipment for chemical
processes.
• IS:226 : Structural Steel (Standard Quality)
• IS:11592 : Code of practice for selection and design of Belt Conveyors.
15.2 DESIGN AND CONSTRUCTION
15.2.1 Chutes, Hoppers
15.2.2 The minimum valley angle of chutes shall be 60 degrees from horizontal.
Technical Specification:Sec-4,System System Parameters, Operation & Control Philosophy
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