Chevron Specification EG-1609

INDUCED DRAFT COOLING TOWERS FOR SALT WATER SERVICE

1.0 GENERAL

1.01 This Specification covers induced draft cooling towers for salt water service.

1.02 The Cooling Tower Data Sheet and other data sheets as listed in the order are a part of this
Specification.

1.03 COMPANY will advise CONTRACTOR of firm starting date at least eight weeks before
erection is to begin.

2.0 CONTRACTOR’S RESPONSIBILITY

2.01 CONTRACTOR shall be solely responsible for the adequacy of the design of the cooling
tower and its auxiliaries, including but not limited to the following:

2.011 Adequacy to meet the operating conditions as listed on the Cooling Tower Data Sheet

2.012 Conformance with applicable local, state or national codes and ordinances. When
more than one code or ordinance or specification applies, the more stringent shall
govern.

2.013 In addition to the above, for towers erected in the State of California, the following
shall also apply:

2.0131 “General Industrial Safety Orders, State of California,” and “Petroleum

Safety Orders, State of California.”

2.0132 Uniform Building Code, 1952 Edition.

2.0133 California Electrical Safety Orders.

2.02 CONTRACTOR shall familiarize himself with COMPANY safety regulations.

3.0 SUPPLEMENTARY DESIGN REQUIREMENTS

3.01 Cooling Tower design shall conform to CTI standards. Sections of ATP-105 not pertinent to
salt water such as Section 2.35 will not apply.

3.02 Design wet bulb temperature shown on the data sheet is the ambient wet bulb temperature and
shall be measured 50 feet up-wind of the tower per paragraph 3.32 of Spec. ATP 105,
Acceptance Test Procedure.

August 1957 Page 1 of 4

Chevron Specification EG-1609

INDUCED DRAFT COOLING TOWERS FOR SALT WATER SERVICE

3.03 Tower fan drivers shall be equipped with individual vibration shut-down devices (ball
mercury switch type preferred; pendulum type not acceptable) weatherproof enclosure with
3/4-inch treaded hub.

3.04 If steam turbine fan drivers are used each turbine shall be equipped with a solenoid to actuate
the overspeed trip mechanism. Solenoid mechanism shall be in a weatherproof enclosure with
3/4-inch threaded hub. The solenoid will be energized upon closure of the vibration shut-down
switch.

3.05 Contact arrangement and operating voltage for vibration shutdown devices and turbine
solenoid trip mechanism shall be as specified in Cooling Tower Data Sheet.

3.06 Wooden access stairways and platforms shall have 42-inch high handrail, with midrail and
toeboard, around top periphery of tower and on outboard side of stairway. Minimum material
requirements: Posts and handrail 2 x 4-in. lumber, toeboard and midrail 1 x 4-in. lumber.
Intermediate landing is desirable. A 30-in. minimum width access way shall be provided
around the top of the tower. Stairway tread plus riser dimensions shall be 17-1/2 in., minimum
riser 6-1/2 in., maximum riser 8 in., preferred dimension, 7-3/4 riser, 9-3/4 tread depth.

3.07 All timber below the water line shall be creosoted to a retention of 10 lbs. per cubic foot.

3.08 No cast iron, carbon steel, or stainless steel shall be used below the fan deck unless
specifically approved by the COMPANY.

3.09 All cast iron, carbon steel, or stainless steel above the fan deck shall have a baked Heresite
coating.

3.10 Minimum height of plenum chamber shall be 8 ft.

3.11 Tower shall have a maximum drift loss of 0.1% of circulation. Design shall strive for a drift
loss of 0.01% of circulation.

3.12 Materials shown on the data sheet are COMPANY’s recommendations for salt water service.
COMPANY will consider substitute materials provided they are equal to or superior to those
shown on the data sheet. CONTRACTOR shall obtain COMPANY approval prior to using
materials other than those specified.

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Chevron Specification EG-1609

INDUCED DRAFT COOLING TOWERS FOR SALT WATER SERVICE

4.0 COMPANY WILL SUPPLY THE FOLLOWING

4.01 Concrete basin and foundation.

4.02 Water piping external to tower and steam piping to turbine flanges.

4.03 Lighting for cooling tower platforms and stairs.

4.04 Installation of conduit and wiring for fan motors and vibration shut-down devices.

4.05 Uncovered storage area near job site for CONTRACTOR’s material.

4.06 Motor starting equipment.

5.0 CONTRACTOR SHALL SUPPLY THE FOLLOWING

CONTRACTOR shall be responsible for supplying all materials, labor, tools, utilities, etc.,
necessary for the erection of the tower complete with auxiliary equipment (except those items listed
in Section 4.0 which will be furnished by COMPANY) including but not limited to the following:

5.01 Freight to COMPANY’s facilities at location specified in order.

5.02 Unloading and hauling of materials to job site.

5.03 Field supervision, erection labor, and all equipment, material and tools necessary for erection.

5.04 All required construction utilities, unless specified otherwise in COMPANY’s purchase order
list sheet.

5.05 Necessary chemical toilets and any covered or enclosed space for large tool and equipment
storage. CONTRACTOR shall remove these facilities at the end of the job.

5.06 Upon completion of erection, site shall be left in orderly fashion and all debris resulting from
the job shall be removed by CONTRACTOR.

5.07 Drawings and Data

5.071 Within two weeks after receipt of order, one reproducible transparency (or 5 prints)
each of the following: Preliminary outline dimension and cross-section drawings for
approval by COMPANY; tower performance curves presenting data in terms of
variables of water temperatures on and off tower, water rate, and wet-bulb
temperature; Cooling Tower Institute Test Procedure Form No. TSC-101-4 filled in to
indicate guaranteed design performance and test factors; base details and anchor bolt

August 1957 Page 3 of 4

Chevron Specification EG-1609

INDUCED DRAFT COOLING TOWERS FOR SALT WATER SERVICE

arrangement drawings; data on forces at tower columns and cross-bracing as required

for foundation design; and any additions or changes to COMPANY’s data sheet
drawings.

5.072 Within two weeks of receipt of approved preliminary prints, one reproducible
transparency (or 7 prints) of final certified drawings.

5.073 Within two months of receipt of order, ten (10) of operating instructions and parts
lists. CONTRACTOR shall indicate in the latter, or list separately recommended
spare parts for tower and fan drivers.

6.0 INSPECTION, TESTS AND WARRANTY

6.01 Field inspection will be made by COMPANY representative.

6.02 Final acceptance of tower by COMPANY is contingent upon results o the test of tower
performance in accordance with Acceptance Procedure of Mechanical Draft Towers as
proposed by the Cooling Tower Institute.

6.03 Cooling Tower performance shall be guaranteed for one full year after tower is placed in
operation.

∗6.04 PD 38 Machinery Clause is a part of these specifications.

∗ CANCELLED as part of this Specification. Check with Standard Specification Coordinator before
using this Specification.

Page 4 of 4 August 1957