Sub: Maintenance
of Heat Exchanger– Additional Work
Sealed tenders are invited from registered contractors with HOCL, Kochi
for Maintenance
of Heat Exchangers – Additional Work
General
Scope of Work for Maintenance of Heat Exchanger & Pressure Safety Valves
·
Once the equipment is
ready for maintenance, isolation of equipment by putting blinds/spectacle
blinds in feed and out let nozzles and all other nozzles indicated for the
purpose and fix blind number tags.
·
Preparation for man
entry ie. provide necessary hose connections for draining, purging, steaming
and water washing and airing of the equipment as the case may be.
·
Fixing and operating
eductors for airing the equipment.
·
Record in the blind tag
Nos. in the blind register and obtain signature in the register by
Engineer-in-Charge.
·
Pressure safety valves
on the equipment and connected pipe lines shall be in the scope of work of the
respective equipment in the schedule of rates unless otherwise mentioned
separately.
·
Assisting the inspecting
team engaged in the inspection of column / pressure vessel.
I. Heat
Exchanger Maintenance
·
Open channel head cover
·
Open channel head
·
Open shell cover and
floating head cover if the exchanger is floating head type.
·
Pull out the tube bundle
(not applicable if exchanger is fixed tube type).
·
Clean the tubes and
shell, channel head and channel head shell and floating head cover and offer
the parts for hydroblasting and cleaning. If hydroblasting is required for cleaning, the
same will be arranged by HOC at their cost.
·
Assemble the tube
bundle, channel head shell and covers in required sequence and stages suitable
for Hydrotest of tube side and shell side separately..
·
Hydrotest the exchanger
on shell side and tube side.
·
Hydrotest should be got
witnessed by Engineer-in-Charge/3rd Party Inspector.
·
Test rigs should be used
for testing floating head type exchangers tube bundle.
·
Test pressure should be
as per the inspection of the Inspector/Engineer-in-charge.
·
Leaking tubes if any
noticed during hydrotest should be plugged using CS/SS/Brass plugs as per the
instruction of Engineer-in-charge.
Required plugs will be supplied by HOC at free of cost.
·
Removal of isolations
ie. blind, spectacle blinds, blind tags.
Note : 50% of the
quoted rate only will be paid to the party if the tube bundle is not pulled out
and brought to the ground (ie. only hydro testing of the tube and shell side
and plugging of the leaking tube is done.)
II. Maintenance
of Pressure Safety Valves
·
Removal of PSV from the
location, which are mounted on vessel/column/Heat Exchanger and or its
connected piping.
·
Blinding inlet/outlet
nozzle of the PSV immediately and put blind tags without disturbing the flare
system and record in the blind register.
·
Dropping the PSV to the
ground level.
·
Transportation of PSV
from site to Central Workshop.
·
After overhauling,
testing and third party inspection by HOCL, collect the valves from Central
Workshop and transport it to the respective locations.
·
Remove the blinds, blind
tags and fix the PSVs at respective locations using new gaskets and fasteners.
·
Cost of these works
shall be absorbed in the quoted rate for the maintenance of columns, Heat
Exchanger, Vessel.
Taxes & Duties
Your quoted rate
shall be inclusive of all taxes and duties whatever applicable to this job
except service tax. Service tax will be paid extra if the
party produces service tax registration and other relevant documents to HOC.
Liquidated
Damages
In the case the party fails to complete the
work within the stipulated period, there shall be a penalty at the rate of ½%
(half percent) of the value of the contract per day of delay to a maximum of 5% of the total contract value.
Defect
Liability Period
Contractor shall guarantee the work for a period of one
year from the date of issue of completion certificate. Any damage or defect that may arise or lie
undiscovered at the time of issue of completion certificate, connected in any
way with the workmanship should be rectified by the contractor at his own
expense as deemed necessary by the Engineer-in-Charge.
Initial
Security Deposit
Initial security deposit @ 2.5% of the contract value
shall be remitted with HOCL, Kochi within 10 days from the date of receipt of
this work order.
Agreement
You have to execute
an agreement with HOC in the prescribed format on a non judicial stamp paper
for Rs. 100/- given in the GCC within 10 days from the date of work order.
Scope
of Supply
·
HOCL shall issue pipe
fittings, hoses, gaskets, fasteners, tube plugs, air, water, electricity at one
point free of cost to the contractor.
·
HOCL shall permit the
contractor to hire the HOCL’s Forklift and mobile crane on chargeable basis if
it is available and the rate shall be Rs. 1000/hr. for mobile Crane of
capacity 18T and Rs. 600/hr. for Forklift + service tax.
·
Contractor shall bring
necessary tools and tackles, chain pulley blocks, D-shackles, slings and any
other equipments required for the work at his own risk and cost.
·
HOC will provide only
the gaskets and fasteners for the final box up work. Temporary gaskets for blinding/isolation
should be made by the contractor.
However, gasket sheets for the same will be provided by HOCL at free of
cost.
Testing & Inspection
HOCL shall inspect
the equipments during the work in progress along with the 3rd party
inspection arranged by HOCL. All the
necessary assistance shall be provided by the contractor to the Inspectors
during inspection of the equipments.
Contractor has to follow all the instruction given by HOCL
Engineer-in-Charge, Inspection Engineer & 3rd party Inspector.
Payment Terms
·
90% payment will be
released after completion of work and certification by Engineer-in-Charge.
·
Balance 10% payment will
be made after defect liability period of one year or on production of PBG for
the said amount.
Completion
Period
The completion period shall be 20
days from the date of clearance to start the job and deviations shall
be permitted as per the work permits issued by HOCL
ESI, PF
Requirements
Please see the
Annexure – A attached.
Note:
1.
This
tender aims for already enlisted contractors for this work with HOCL Kochi
Unit. Any new contractor who wish to
empanel for this type of work may submit the credentials as detailed below so
that they will be evaluated and pre-qualified and shall be considered for
similar future work.
Credentials to be submitted for the
pre-qualification.
1.
Details
of the Organization and the works carried out
2.
Work
Order copies of the work executed showing the order value for the last 3 years.
3.
Man
Power Organogram
4.
Solvency
Certificate from a Nationalized Bank
5.
Annual
Turn over for the last 3 Years.
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