PACKAGE : I Bid Document VOLUME : II - Public Health Engineering

Suppression of Noise:
All plant offered shall be quiet in operation. The noise levels in the entire premises
shall be as per the norms of the Pollution Control Board. The noise levels measured
as per IS/ISO:4412-1, 2-1991 shall be within the levels prescribed by MSPCB. The
noise level within the building shall not be more than 85 decibels (+5 per cent on
this over the audible frequency spectrum measured at mid-band.) “A” scale when
measured along a contour 3 metres from any single item of plant during starting,
running and stopping. The noise level outside the building shall not be more than
60 decibels (+5 per cent on this over the audible frequency spectrum measured at
mid-band.) “A” scale when measured along a contour 3 metres from the external
wall. Noise test measurements shall be made on completion of the installation of
the plant at Site to verify that it complies with this Clause. Plant which fails to
comply with the noise level limits when tested will render it liable for rejection
unless it is satisfactorily modified at the Contractors expense by the programmed
commissioning date.
15.23 Horizontal Split Casing Centrifugal Pumps (Water).
General:
This section covers in general the required specification with respect to horizontal
split casing centrifugal water pumps. The details pertaining to the design, drawing,
selection of equipment/materials, procurement, manufacture, installation, testing &
commissioning however if not mentioned, the same shall be of high standard of
engineering and shall comply with all currently applicable standards regulation and
safety codes.
System Head Curves:
The pump shall be suitable for operation in a pumping system, at the duty points
specified for each pump and should be able to satisfactorily operate within the range
of operation indicated on the system resistance curve or as specified.
GTS : General Technical Specification. Page 146