USACE / NAVFAC / AFCESA / NASA UFGS-43 21 29 (April 2006)
------------------------------
Preparing Activity: NAVFAC Replacing without change
UFGS-13401 (August 2004)
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are in agreement with UMRL dated January 2009
SECTION 43 21 29
FLOW MEASURING EQUIPMENT [POTABLE WATER] [SEWAGE TREATMENT PLANT]
04/06
NOTE: This guide specification covers the requirements for flow measuring equipment
for use in potable water or sewage treatment plant.
Edit this guide specification for project specific requirements by adding, deleting,
or revising text. For bracketed items, choose applicable items(s) or insert
appropriate information.
Remove information and requirements not required in respective project, whether
or not brackets are present.
Comments and suggestions on this guide specification are welcome and should
be directed to the technical proponent of the specification. A listing of technical
proponents, including their organization designation and telephone number, is
on the Internet.
Recommended changes to a UFGS should be submitted as a Criteria Change Request
(CCR).
NOTE: Special consideration not included in this guide must be given to sewage
with high salt water concentration or carrying industrial wastes containing
components detrimental to materials used in typical treatment plant and biodegrading
micro-organisms.
PART 1 GENERAL
1.1 REFERENCES
NOTE: This paragraph is used to list the publications cited in the text of
the guide specification. The publications are referred to in the text by basic
designation only and listed in this paragraph by organization, designation,
date, and title.
Use the Reference Wizard's Check Reference feature when you add a RID outside
of the Section's Reference Article to automatically place the reference in the
Reference Article. Also use the Reference Wizard's Check Reference feature
to update the issue dates.
References not used in the text will automatically be deleted from this section
of the project specification when you choose to reconcile references in the
publish print process.
The publications listed below form a part of this specification to the extent referenced. The publications are
referred to within the text by the basic designation only.
[AMERICAN WATER WORKS ASSOCIATION (AWWA)AWWA C700(2002; Errata 2008) Standard for Cold Water Meters - Displacement Type, Bronze Main CaseAWWA C704(2008) Propeller-Type Meters for Waterworks Applications][ASME INTERNATIONAL (ASME)ASME B16.1(2005) Standard for Gray Iron Threaded Fittings; Classes 125 and 250ASME PTC 19.5(2004) Flow Measurement][ASTM INTERNATIONAL (ASTM)ASTM A 126(2004) Standard Specification for Gray Iron Castings for Valves, Flanges, and Pipe FittingsASTM B 61(2008) Standard Specification for Steam or Valve Bronze Castings][U.S. DEPARTMENT OF DEFENSE (DOD)MIL-P-24441(Rev C; Supp 1; INT Am 1) Paint, Epoxy-Polyamide]1.2 SYSTEM REQUIREMENTS
The flow measuring equipment shall be the [variable head meter type for closed channel] [variable head meter
type for open channel] [variable area meter type] [propeller meter type] [electromagnetic meter type] [volumetric
meter for [open] [closed] channel] [ultrasonic meter type]. The design shall permit ease of installation and
shall not have any features hazardous to personnel or detrimental to the equipment. Provision shall be made
to align and adequately lubricate moving parts. Interior parts shall be easily accessible for adjustment, repair,
and replacement.
1.3 SUBMITTALS
NOTE: Review submittal description (SD) definitions in Section 01 33 00 SUBMITTAL
PROCEDURES and edit the following list to reflect only the submittals required
for the project. Submittals should be kept to the minimum required for adequate
quality control.
A “G” following a submittal item indicates that the submittal requires Government
approval. Some submittals are already marked with a “G”. Only delete an existing
“G” if the submittal item is not complex and can be reviewed through the Contractor’s
Quality Control system. Only add a “G” if the submittal is sufficiently important
or complex in context of the project.
For submittals requiring Government approval on Army projects, a code of up
to three characters within the submittal tags may be used following the "G"
designation to indicate the approving authority. Codes for Army projects using
the Resident Management System (RMS) are: "AE" for Architect-Engineer; "DO"
for District Office (Engineering Division or other organization in the District
Office); "AO" for Area Office; "RO" for Resident Office; and "PO" for Project
Office. Codes following the "G" typically are not used for Navy, Air Force,
and NASA projects.
Choose the first bracketed item for Navy, Air Force and NASA projects, or choose
the second bracketed item for Army projects.
Government approval is required for submittals with a "G" designation; submittals not having a "G" designation
are [for Contractor Quality Control approval.][for information only. When used, a designation following the
"G" designation identifies the office that will review the submittal for the Government.] The following shall
be submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:
SD-03 Product Data
Flow measuring equipment components
Read-out device
SD-06 Test Reports
Flow measuring equipment calibration
Open channel test
Dimensional inspection report
Closed channel test
SD-08 Manufacturer's Instructions
Flow measuring equipment components
Submit manufacturer's written recommendation for installation and handling.
1.4 QUALITY ASSURANCE
1.4.1 Requirements
Perform calibration and submit test report for flume in variable head meter for open channel. Submit dimensional
inspection report and flow versus differential head curve for variable head meters for closed channel; accuracy
shall be plus or minus 1.0 percent over a 10 to 1 flow range. Submit as required in paragraph entitled "Field
Tests and Inspections."
PART 2 PRODUCTS
2.1 MATERIALS AND EQUIPMENT
NOTE: Choose the paragraphs which follow based on type of meter needed for
the system selected in the paragraph entitled "System Requirements."
Unless otherwise specified, all materials and equipment shall be standard commercial products in regular production
by the manufacturer and suitable for the required service.
2.1.1 Variable Head Meter for Closed Channel
NOTE: Delete this paragraph and the subparagraphs which follow when variable
head meter for closed channel is not required.
Shall include [an orifice plate] [a flow nozzle] [a Venturi tube] as differential head producer, a diaphragm
meter as differential measurement, and [an indicator] [and an integrator] as read-out device[s]. [Remote transmission
also shall be included.] Meter shall be provided for [potable water] [plant water] [water for chlorination]
[air for aeration] [recirculated plant effluent] [plant effluent] [plant influent] [bypass line] [primary sludge]
[return sludge] [sludge to waste] [digested sludge] flow where indicated.
[2.1.1.1 Orifice Plate
NOTE: Select this paragraph entitled "Orifice Plate," or the paragraphs below
entitled "Flow Nozzle," "Venturi Tube," or "Modified Venturi."
Shall be of the differential producing type with circular hole, and designed for insertion in a [_____] mm inch
pipe where indicated. The orifice plate shall measure the flow of [_____] to [_____] [cubic meter per second]
[gpm]. Provide the orifice plate with a flange union to hold the plate perpendicular to the axis of the pipe.
The flange shall have a pressure rating of 862 kPa 125 psi and shall have threaded ends. The orifice plate shall
be of stainless steel and shall be furnished with a tab designating line size, orifice size, and flow direction.
The orifice plate shall be in accordance with recommendations of the ASME PTC 19.5, except as modified herein.
The pressure taps shall be of the [flange] [one diameter upstream and one-half diameter downstream] [corner]
type and sized in accordance with recommendations of the ASME PTC 19.5.
][2.1.1.2 Flow Nozzle
Shall be of the differential producing type having a modified Venturi flow nozzle contour, and designed for at
least 90 percent head recovery for insertion in [_____] mm inch pipe where indicated. The nozzle shall measure
the flow of [_____] to [_____] [cubic meter per second] [gpm]. The flow nozzle shall have 862 kPa 125 psi flanged
ends conforming to ASME B16.1. Construct the nozzle of cast iron conforming to ASTM A 126, Grade B. The throat
liner shall be of bronze conforming to ASTM B 61. The length of the throat liner shall be equal to 75 percent
of the throat diameter. The inlet pressure tap shall be one diameter upstream and the outer pressure tap shall
be [one-half diameter downstream] [the throat type]. [The taps for use with sewer and sludge must have built-in
capabilities for manual rodding of the holes.]
][2.1.1.3 Venturi Tube
Shall be of the differential producing type, and designed for [potable water] [sewage] [sludge] service with
at least 90 percent head recovery [in accordance with recommendations of the ASME PTC 19.5] for use in a [_____]
mm inch pipe where indicated. The Venturi shall measure the flow of [_____] to [_____] [cubic meter per second]
[gpm]. The Venturi shall have 862 kPa 125 psi flanged ends conforming to ASME B16.1. The laying length shall
be approximately that indicated. Construct the body of cast iron conforming to ASTM A 126, Grade B. The throat
section and vent bushing shall be bronze conforming to ASTM B 61. [For sludge service, equip the tube with manual
vent cleaners requiring not more than 1.57 rad 90 degrees rotation for full operation.] [For sludge service,
provide a water purge system and two matched assemblies of piping, valves, rotometers, and fittings. The purge
system shall operate on a clean water supply of 0.000063 cubic meter per second one gpm at a regulated pressure
of 69 kPag 10 psiggreater than line pressure. The Venturi interior waterways shall be finished with an anti-stick
coating.]
][2.1.1.4 Modified Venturi
Shall be of the differential producing type, and designed for [potable water] [sewage] [sludge] service with
at least a 90 percent head recovery for use in a [_____] mm inch pipe where indicated. The Venturi shall measure
the flow of [_____] to [_____] [cubic meter per second] [gpm]. The laying length shall be approximately that
indicated. The modified Venturi shall be of the insert type constructed of fiberglass reinforced polyester.
The holding flange shall be carbon steel, bronze, or fiberglass reinforced plastic with integral pressure taps
for mounting between 862 kPa 125 psi ASME B16.1 flanges.
]2.1.1.5 Diaphragm Meter
Shall have a range of [_____] to [_____] [cubic meter per second] [gpm], and a minimum differential of not less
than 25 mm one inch. The maximum differential shall be equal to the range squared but shall not exceed 2500
mm 100 inches of water column. It shall have stainless steel bellows with built-in overrange protection to prohibit
deformation of the bellows. Contain the bellows in a forged brass or cadmium-plated forged carbon steel housing
to withstand a working pressure of at least 3.45 MPa 500 psi. Transmit the output motion of the bellows to the
local read-out device. There shall be zero adjustment in the diaphragm meter. Accuracy shall be plus or minus
0.5 percent of full scale over a 3 to 1 flow range.
[2.1.2 Variable Head Meter for Open Channel
NOTE: Delete these paragraphs when variable head meter for open channel is
not required.
Shall include [a weir] [a flume] as head producer, a stilling well with float and cable as head measurement,
and [an indicator] [a recorder] [and an integrator] as read-out device(s). [Remote transmission also shall be
included.] Provide meter for [potable water] [plant influent] [bypass line] [plant effluent recirculation] [return
sludge] [plant effluent] flow where indicated.
][2.1.2.1 Weir
NOTE: Select this paragraph entitled "Weir," or the paragraphs below entitled
"Parshall Flume," or "Flume."
Shall be of the [rectangular] [1.05 rad] [60 degree] [triangular (V-notch)] [1.57 rad] [90 degree] [triangular
(V-notch)] [Cipolletti] type as indicated. The weir shall measure the flow of [_____] to [_____] [cubic meter
per second] [mgd]. The upstream face of the weir plate shall be flat and smooth. Any bolts or rivets used to
fasten the plate shall be countersunk flush with the plate. Bolt holes shall include provision for adjustment
of height and level. The edges of the weir plate exposed to flow shall not exceed 3 mm 1/8 inch in thickness;
where thicker plates must be used, the edge shall be beveled 0.78 rad 45 degrees or more to the required 3 mm
1/8 inch. Make the weir plate of stainless steel or fiberglass reinforced polyester laminate containing at
least 30 percent fiberglass by weight.
][2.1.2.2 Parshall Flume
Shall be of the Parshall type, and shall measure the flow of [_____] to [_____] [cubic meter per second] [mgd]
. The flume shall have a converging upstream section, a throat, and a diverging downstream section. The complete
unit shall have vertical walls. Stilling wells and throat floor shall be inclined downward. Construct the flume
of polyester resin reinforced with not less than 30 percent fiberglass by weight and provided with locking devices
for engagement with the grout around the liner. Reinforcing ribs shall be an integral part of the flume while
removable bracing shall be provided to ensure proper maintenance of liner dimensions during shipment and installation.
][2.1.2.3 Flume
Shall be of the characterized type, and shall measure the flow of [_____] to [_____] [cubic meter per second]
[mgd]. The flume shall have a cast iron measuring section having a circular inlet and a characterized outlet.
The inlet line size shall be [_____] mm inches. The inlet shall be ASME B16.1, 862 kPa 125 psi, flanged. The
flume shall have a flat invert free from pockets and obstructions. [Equip the flume with a manual vent cleaner
and sediment trap.]
]2.1.2.4 Float and Cable
Shall have a range of [_____] to [_____] [cubic meter per second] [mgd] with a head measurement of [_____] mm
inches. Measure the crest level in a stilling well as indicated. The measuring system shall include a float,
cable, drum, transfer gear assembly, and cam mechanism to provide uniformly graduated units of flow. The float
shall be of polyester, stainless steel, or copper, and of a weight and shape that conform to the application
requirements. The cable shall be plastic-coated multi-strand stainless steel, stainless steel beads, or multi-strand
monel. Groove the drum to prevent overlapping of the cable. Provide the float and cable with stops to prevent
overranging and to provide a zero adjustment. All materials of construction shall be corrosion-resistant. Provide
protection tubes for the cables. Accuracy shall be plus or minus 2 percent of the actual rate over a 5 to 1
range.
2.1.3 Variable Area Meter for [Open] [Closed] Channel
NOTE: Delete this paragraph when a variable area meter for an open or closed
channel is not required.
Provide a variable area meter as indicated. Make the variable area meter of a tapered tube with a float that
will indicate a flow range of [_____] to [_____] [cubic meter per second] [gpm]. The tube shall be glass with
flow units etched on it and shall be placed vertically for reading. It shall consist of fiberglass, stainless
steel, or aluminum with stainless steel fitted ends and fluorinated hydrocarbon rubber or chloroprene 0-rings.
The float shall be stainless steel and easily read. The metering tube shall be easily removed for range change
or cleaning without tools or removing the meter from the line. Provide a needle valve for adjusting flow where
indicated. Accuracy shall be plus or minus 5 percent over a 3 to 1 range.
2.1.4 Propeller Meter
NOTE: Delete this paragraph when a propeller meter is not required.
Provide a propeller meter where indicated. The meter shall measure the velocity and convert it to flow units.
The meter shall have a range of [_____] to [_____] [cubic meter per second] [gpm] for use in a [_____] mm inch
pipe. Materials shall conform to the applicable requirements of AWWA C704. [The propeller meter shall be of
the saddle type for a working pressure of 862 kPa 125 psi and be supplied with a steel welding saddle and separate
straightening vanes.] [The propeller meter shall be of the tube type for a working pressure of 862 kPa 125 psi
and be furnished complete with a tube, built-in straightening vanes, and 862 kPa 125 psi ASME B16.1 flanged
ends, or threaded connections, as appropriate for the pipe.] Provide the meter head with a conical shaped three-blade
propeller mounted transversely in the line. The meter shall be completely sealed from water pressure and able
to withstand thrust on the front of the propeller. Accuracy shall be plus or minus 2 percent of actual rate
over a 10 to 1 range.
2.1.5 Electromagnetic Meter
NOTE: Delete this paragraph when an electromagnetic meter is not required.
NOTE: For plant influent service, allow the optional use of chloroprene-lined
stainless steel or steel, polyurethane-lined stainless steel or steel, or fiberglass
tubes. For primary sludge service, allow the optional use of tetrafluoroethylene-lined
stainless steel or steel, vitreous enamel-lined stainless steel or steel, glass-lined
stainless steel or steel, or tetrafluoroethylene-lined aluminum tubes. For
recirculated plant effluent, allow the optional use of tetrafluoroethylene-lined
stainless steel or steel, chloroprene-lined stainless steel or steel, or fiberglass
tubes. For return sludge service, allow the optional use of tetrafluoroethylene-lined
stainless steel or steel, chloroprene-lined stainless steel or steel, or fiberglass
tubes. For sludge to waste service, allow the optional use of tetrafluoroethylene-lined
stainless steel, vitreous enamel-lined stainless steel or steel, or glass-lined
stainless steel or steel tubes. For digested sludge service, allow the optional
use of tetrafluoroethylene-lined stainless steel or steel, chloroprene-lined
stainless steel or steel, or fiberglass tubes. For plant effluent service,
allow the optional use of tetrafluoroethylene-lined stainless steel or steel,
chloroprene-lined stainless steel or steel, or fiberglass tubes.
NOTE: Delete the bracketed sentence beginning "Provide a transformer..." when
power supply is 120 volts.
NOTE: Delete requirements for cleaning except when meter is for any sludge
service.
Provide a magnetic flow meter where indicated. The magnetic flow meter shall measure the flow of [_____] to
[_____] [cubic meter per second] [mgd] and be suitable for a [_____] mm inch pipe. The magnetic flow meter system
shall include a flow tube, local read-out receiver, [remote transmission,] and interconnecting cable where indicated.
The flow meter shall be a [tetrafluoroethylene-lined stainless steel or steel] [chloroprene-lined stainless steel
or steel] [polyurethane-lined stainless steel or steel] [vitreous enamel-lined stainless steel or steel] [glass-lined
stainless steel or steel] [tetrafluoroethylene-lined aluminum] [fiberglass] tube with the necessary cores and
coils to provide a magnetic field without any interference and with [1034 kPa] [150 psi] [modified ASME B16.1
carbon steel flanges] [Dresser type coupling] [Victaulic type couplings] [integral fiberglass flanges]. Electrodes
shall be of stainless steel. The tube shall operate from [120] [240] volts, [_____] hertz, single-phase ac power.
A weatherproof housing shall cover the magnets, coils, and connections. [Provide a transformer within the transmitter
housing to provide 120 volts power to the receiver.] [Provide a system for cleaning the electrodes or tube automatically
without taking the tube out of service. Automatic mechanical cleaning of electrodes or tube will not be acceptable.]
The metering tube shall have an approximate laying length as indicated. Provide all necessary cable between the
transmitter and receiver. Accuracy shall be plus or minus one percent over a 10 to 1 range. The receiver shall
convert the ac voltage signal generated in the flow tube to a uniform flow signal. There shall be an adjustment
for zero and span.
2.1.6 Volumetric Meter
NOTE: Delete this paragraph when a volumetric meter is not required
Provide a volumetric meter where indicated. The meter shall conform to AWWA C700. The meter shall be of the
rotating-disc type for use in a [_____] mm inch pipe and shall be of the frostproof type, if applicable.
2.1.7 Ultrasonic Meter
NOTE: Delete this paragraph when an ultrasonic meter is not required.
Provide an ultrasonic meter where indicated. The meter shall have a velocity range of 0 to 1.52 meters per second
through 0 to 6.10 meter per second 0 to 5 feet per second through 0 to 20 feet per second for use with a [_____]
mm inch pipe. The flow meter shall consist of [separate transmitting and receiving transducers clamped to the
outside of the pipe to measure the liquid flow without, in anyway, intruding into or altering the pipe.] [the
primary element employing a single pair of electro-acoustic transducers mounted diagonally in a flow tube, and
in direct contact with the liquid flow to be measured] [a single transducer with twin crystals encapsulated in
an epoxy housing mounted on the outside of the pipe. The transmitting crystal shall emit a continuous ultrasonic
pulse or frequency into the liquid stream to be reflected back to the receiving crystal. It shall measure the
difference in frequencies which is proportional to the liquid flow.] The transmitter shall contain all necessary
circuitry enclosed in NEMA 4 [indoor] [outdoor] housing suitable for [wall] [panel] mounting and connected to
the transducers by [_____] m feet of cable. It shall produce an accurate 4 to 20 mA dc signal linear with flow
rate. It shall provide linearity of plus of minus 0.5 percent and repeatability of 0.1 percent under simulated
flow. Long term drift of the pulse rate output shall be less than 0.1 percent. It shall operate with 115 or
230 volt plus or minus 10 percent, 50 or 60 Hz electrical power. The unit shall function over an ambient temperature
range of [_____] degrees C F to [_____] degrees C F indoor or [_____] degrees C F to [_____] C F outdoor. The
flow rate indicator shall be integrally mounted in the transmitter housing. Graduate 150 mm 6 inch scale length
in [meter per second] [cubic meter per second] [fps] [gpm].
2.2 READ-OUT DEVICE
NOTE: Retain appropriate paragraphs and delete others.
Provide the meter with the following read-out device which shall read from [_____] to [_____] [cubic meter per
second] [gpm].
[2.2.1 Local Read-Out
NOTE: Choose this paragraph entitled "Local Read-Out," or the paragraph below
entitled "Local Read-Out and Remote Transmission," including its subparagraphs
"Indicator," "Recorder," and "Integrator."
Provide [an indicator] [a recorder] [and an integrator] for local read-out of flow. The scale graduation shall
be [uniform] [square root]. The read-out shall be visible through a shatterproof clear window. The read-out
mechanism shall not be affected by the intended end use environment. The unit shall be non-corrosive and weatherproof
or provided with a separate weatherproof housing with a sealed door for access to the mechanism, and designed
to prevent the accumulation of moisture or fog inside the case. Provide a suitable mounting.
][2.2.2 Local Read-Out and Remote Transmission
Provide [an indicating transmitter] [a recording transmitter] [and an integrator] for local read-out and transmission
of flow data to remote read-out. The scale graduation shall be [uniform] [square root]. The read-out shall
be visible through a shatterproof clear window. The read-out and transmission mechanism shall not be affected
by the intended end use of environment. The transmission shall be impulse duration type or milliampere dc analog
signal type to the remote read-out. Actuate all transmission by the output motion or the ac voltage signal of
the meter. Power required [shall come from the meter] [shall be [_____] volts, [_____] hertz, ac]. When impulse
duration type transmission is used, the system shall have a 15 second maximum cycle actuating a cam-operated
contact. The contact shall be of the totally-enclosed type. The unit shall be non-corrosive and weatherproof
or provided with a separate weatherproof housing with a sealed door for access to the mechanism, and designed
to prevent the accumulation of moisture or fog inside the case. Provide a suitable mounting.
2.2.2.1 Indicator
Shall be a minimum of 150 mm 6 inches long.
2.2.2.2 Recorder
Shall be a minimum of 250 mm 10 inches in diameter and shall rotate once [daily] [weekly] [monthly]. The chart
drive shall be driven by a synchronous motor from [_____] volts, [_____] hertz, ac.
2.2.2.3 Integrator
Shall read the total flow in the units specified using only a whole power of 10 multiplier.
]2.2.3 Remote Read-Out
Provide [an indicator] [a recorder] [and an integrator] for remote read-out of flow. The scale graduation shall
be [uniform] [square root]. The read-out shall accept the signal output and be of the same range and flow units
as the local read-out and remote transmission device. The signal shall actuate an electro-mechanical receiver
in which the input duplicates the output of the remote transmission device. Ac or dc power supply shall be provided,
if required. The read-out shall be visible through a shatterproof clear window. The read-out shall not be affected
by the intended end use environment. The unit shall be weatherproof or provided with a separate weatherproof
housing with a sealed door for access to the mechanism, and designed to prevent the accumulation of moisture
or fog inside the case. Provide a suitable mounting.
2.2.3.1 Remote Read-Out Indicator
Shall be a minimum of 150 mm 6 inches long.
2.2.3.2 Remote Read-Out Recorder
Shall be a minimum of 250 mm 10 inches in diameter and shall rotate once [daily] [weekly] [monthly]. The chart
drive shall be driven by a synchronous motor from [_____] volts, [_____] hertz, ac.
2.2.3.3 Remote Integrator
Shall read the total flow in the units specified using only a whole power of 10 multiplier.
2.3 ELECTRICAL REQUIREMENTS
NOTE: Delete paragraph except when electromagnetic meter, electric drive chart
for recorders, or remote read-out is required.
NOTE: Delete requirements for signal circuit when remote read-out is not required.
Unless indicated or specified otherwise, the electrical components of the meters, such as chart drives and electrical
disconnecting (isolating) means, are included under this section. [Provide wiring for signal circuit as specified
by the equipment manufacturer.] The interconnecting conduit and wire (except when otherwise specified herein,
or when included in factory-assembled equipment) and the electrical connection of the meters to the electrical
power circuit are specified in Division 16.
2.4 SPARE PARTS
NOTE: Delete the bracketed sentence when recorder is not required.
Provide all standard recommended spare parts as specified in the manufacturer's instruction manuals for each
component in the system. [Furnish one year's supply of charts and ink for each recording device.]
PART 3 EXECUTION
3.1 MATERIALS PROTECTION
The entire tube, except the throat section of the [flow nozzle] [Venturi] [characterized flume], shall receive
a series of coats of paint conforming to MIL-P-24441. Apply the paint in the following order: one coat of Formula
150, one coat of Formula 151, one coat of Formula 156, and one coat of Formula 152. The final total dry-film
thickness shall be not less than 0.25 mm 10 mils. Furnish all other items in accordance with the manufacturer's
standard practice suitable for end use environment.
3.2 INSTALLATION
Furnish the services of an engineer representative of the manufacturer of the flow measuring equipment for checking
the installation, making the necessary adjustments and calibrations, placing the equipment in operation, and
performing the acceptance tests. The representative also shall be available for not less than 2 days to instruct
operating personnel in the use, operation, and maintenance of the equipment during the initial operating period.
Install all flow measuring equipment in accordance with the recommendations of the manufacturer. Install variable
head meter[s] for closed channel[s] in accordance with the ASME PTC 19.5. Install weir[s] with the top exactly
level at the elevation indicated.
3.3 FIELD TESTS AND INSPECTIONS
Test and calibrate in place the flow measuring equipment to demonstrate that it meets the accuracy requirements
for the full range of flows specified herein. Provide all labor, equipment, and incidentals required for the
tests, including electric power and water required for tests. The Contracting Officer will witness all field
tests and conduct all field inspections. The Contractor shall give the Contracting Officer ample notice of the
dates and times scheduled for tests. Rectify any deficiencies found and retest work affected by such deficiencies
at the Contractor's expense. Record data from each field test shall be recorded and documented in a formal field
test report.