GADARWARA STPP-I (2 X 800 MW)– STATION PIPING PACKAGE
(SALIENT TECHNICAL FEATURES).
Salient technical features of the equipment / systems /
services covered in the IFB no. CS-9572-131(R)-2 are mentioned below. These
Salient Technical Features are mentioned only to facilitate the prospective
bidder to prima-facie understand the requirements under the tender and shall
not in any way limit or alter the scope of work and technical
features/specification of equipment/system/services covered in the bidding
documents. Detailed provisions in regard of scope of work and technical
features/specification of equipment/system/services covered in the bidding
documents shall be final and binding.
Design, engineering, manufacturing, supply, fabrication
at site, testing at shop, inspection, packaging, transportation to site,
storage, taking delivery of Employer supplied equipment from site stores, in
plant transportation, erection, cleaning, anticorrosive protection, painting of
above ground piping, testing and commissioning of all items like fittings,
supports / hangers, valves, actuators, motors, specialties, tanks, instruments,
drain, vents including drain / vent valves and air release valves for the
following piping systems.
The
steam generator units under stage-I shall have facility to firing LDO only.
Hence Fuel Oil unloading and storage system shall be designed to handle light
diesel oil (LDO). Light diesel oil (LDO) shall be used for initial startup, low
load (up to 30% BMCR capacity) operation and as secondary fuel for pulverized
coal flame stabilization at the start-ups/ low load operations of the steam
generator while firing coal.
It is
proposed to transport light diesel oil (LDO) to the power plant either by
railway wagons or by road tankers. The receiving yard shall be designed to
unload one (1) full rake at a time. The oil from railway wagons shall be
unloaded to unloading header by gravity which shall then be pumped to storage
tanks through unloading pumps. In case of road tanker unloading, the oil shall
be unloaded from road tankers by gravity into the unloading header. From there
it will be transferred to oil storage tanks through positive displacement
pumps. Provision shall be kept to unload
ten (10) nos. road tankers at a time for light diesel oil (LDO).
Salient
features of FO unloading & storage system :
a) Two (2) numbers storage tank each of capacity 2500 m3
for storage of LDO. The tanks shall be located in the same installation.
b) One (1) number day oil tanks for auxiliary boiler of
capacity 100 m3 for storage of LDO. The tank shall be located in the vicinity
of the auxiliary boiler.
c) One (1) number drain oil tank of capacity six (6) m3
complete with accessories and instrumentation.
d) Five (5) nos. LDO pumps-set each of capacity 100 m3/hr
for unloading of Rail wagons complete with piping & all the accessories of
drive and mounting.
e) Two (2) nos. LDO pumps-set each of capacity 50 m3/hr
for unloading of Road tankers complete piping & with all the accessories of
drive and mounting.
f) Two (2) nos. LDO transfer pump motor sets each of
capacity 25 m3/hr complete with all the accessories of drive and mounting for
transfer of LDO from storage tanks to day oil tank for auxiliary boiler.
g) Two (2) nos. LDO drain pumps-set each of capacity 10
m3/hr. complete with all the accessories of drive and mounting.
h) Two (2) Nos. sump pump set of capacity 30 m3/hr
complete with all accessories of drive and mounting.
i) Two (2) nos. dirty oil pumps of capacity 5 m3/hr and
two (2) nos. water pumps of capacity 30 m3/hr at the oil water separator pit
for pumping out dirty oil and clear water from the oil water separator pit.