NATIONAL ALUMINIUM COMPANY LIMITED - Rites

(i) Base plates together with foundation bolts and nuts. The base plate shall
accommodate the discharge pipe, which is to be terminated above the floor level.
(ii) Motor stool.
(iii) Non-return return valves and gate vvalves
alves on pump discharge lines (unless otherwise
specifically excluded).
(iv) Lifting lugs, eye bolts etc.
(v) Pre-lubricating lubricating tank with accessories (if necessary).
(vi) Sleeves and inserts to be embedded in concrete.
(vii) Coupling guard, if necessary
16.6.2.13 The pump shaft shall be connected to motor shaft by a heavy duty rigid/flexible coupling
or the pump shall be VV-belt
driven.
16.6.3 PIPING, FITTINGS, VALVES AND SPECIALTIES
16.6.3.1 Piping & Fittings
(a) Material of construction of piping and fittings shall not be inferior to those given in data
sheet of this section.
(b) All piping shall be capable of withstanding the maximum pressure in the corresponding
line at the relevant temperature.
(c) In general pipe sizes 65 mm NB and larger are to be joined by butt welding and pipe work
of size 50 mm NB and below by socket welding/screwed connections. Joints at valves or
specialities shall be flanged for sizes 65 mm NB or large and screwed for sizes 50 mm NB
and below. All galvanized piping shall be joined by screwed connec connections. tions. Minimum pipe
diameter selected for DS/SW/PW/Cooling Water System (along with branch pipes) shall
be 32 NB.
(d) End preparation for butt welding shall be done by machine/flame cutting. Socket weld
and preparation shall be saw/machine cut.
(e) Hangers and supports ports shall be capable of carrying the sum of all concurrently acting
loads. They shall be designed to provide the required supporting effects and allow pipe
line movements as necessary. All guides, anchors, braces, dampers, expansion joints and
structural steel to be attached to the building/structure, trenches etc. shall be provided.
The type of hangers and components for all piping shall be selected and approval
obtained from the Owner Owner/RITES.
(f) All piping shall be routed on ground on concrete pedestals and at road crossings, these
shall be laid through hume pipes.
16.6.3.2 Valves and Specialties
(a) Valves & Specialties shall be used to start, stop or regulate the flow. All valves/specialities
below 50 mm size (for isolation purpose) in service water/dust suppression/potable water
lines should be plug type of proven make.
(b) All valves shall be suitable for most stringent service conditions i.e. flow, temperature and
pressure under which they may be required to operate.
Technical Specification:Sec-4,System System Parameters, Operation & Control Philosophy
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