************************************************************************** USACE / NAVFAC / AFCEC / NASA ...

************************************************************************** USACE / NAVFAC / AFCEC / NASA    ...
**************************************************************************
USACE / NAVFAC / AFCEC / NASA
UFGS-26 42 22.00 20 (January 2008)
---------------------------------Preparing Activity: NAVFAC
Superseding
UFGS-26 42 22.00 20 (April 2006)
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are in agreement with UMRL dated January 2016
**************************************************************************
SECTION TABLE OF CONTENTS
DIVISION 26 - ELECTRICAL
SECTION 26 42 22.00 20
CATHODIC PROTECTION SYSTEM FOR STEEL WATER TANKS
01/08
PART 1
GENERAL
1.1
REFERENCES
1.2
DEFINITIONS
1.3
SUBMITTALS
1.4
SERVICES OF CORROSION ENGINEER
1.5
QUALITY ASSURANCE
1.5.1
Regulatory Requirements
1.5.2
Standard Products
1.5.2.1
Alternative Qualifications
1.5.2.2
Material and Equipment Manufacturing Date
1.6
WARRANTY
1.7
VERIFICATION OF SITE CONDITIONS
PART 2
PRODUCTS
2.1
IMPRESSED CURRENT ANODES
2.1.1
High-Silicon Chromium Bearing Cast Iron
2.1.2
Aluminum Anodes
2.1.3
Precious Metal Anodes
2.2
GALVANIC ANODES
2.2.1
Magnesium Anodes
2.3
ANODE LEAD WIRES
2.3.1
Attachment of Anode Lead Wire
2.3.1.1
End Connected Anode
2.3.1.2
Center Connected Anode
2.3.1.3
Mixed Metal Oxide Anode Lead Wires
2.4
RECTIFIERS
2.4.1
Transformers
2.4.2
Electrical Ratings
2.4.3
Rectifying Elements
2.4.4
Enclosure
2.4.5
Oil Immersed Enclosures
2.4.6
Wiring and Schematic Diagram
2.4.7
Overload and Short Circuit Protection
2.4.8
DC Output Control
SECTION 26 42 22.00 20
Page 1
2.4.8.1
Transformer Taps
2.4.8.2
Automatic Controls
2.4.9
Output Voltage and Current Meters
2.4.10
Grounding Provisions
2.4.11
Resistance to Ground
2.4.12
Fuses
2.4.13
Surge Protection
2.4.14
Efficiency
2.4.15
Rectifier Replacement/Spare Parts List
2.5
REFERENCE ELECTRODES
2.6
SHUNT RESISTORS
2.7
CONDUIT
2.8
CABLE OTHER THAN ANODE LEAD WIRES
2.8.1
AC Power Supply Wiring
2.8.2
Anode Wire
2.8.3
Rectifier DC Positive (Anode) Header Cable
2.8.4
Cable Identification Tags
2.8.5
Wire Connectors
2.8.6
Insulating Tape
2.8.7
Splices
2.9
ANODE JUNCTION BOXES
2.9.1
Post Top Mounted Type
2.9.2
Wall Mounted Type
2.9.3
Terminal Boards
2.10
CLEVIS ASSEMBLIES
2.11
PIN INSULATORS
2.12
HANDHOLE ASSEMBLIES
2.13
EXOTHERMIC WELD KITS
2.14
MANUFACTURER'S NAMEPLATE
2.15
FIELD FABRICATED NAMEPLATES
PART 3
EXECUTION
3.1
INSTALLATION
3.1.1
Anode Installation
3.1.1.1
Icing Climate Requirements
3.1.1.2
Anode Placement
3.1.1.3
Anode Hangers
3.1.1.4
Handholes
3.1.2
Anode Connection
3.1.2.1
Anode Lead Wires
3.1.2.2
Anode Header Cable
3.1.2.3
Splices
3.1.3
Rectifiers
3.1.3.1
Rectifier Installation
3.1.3.2
Wire-To-Tank Connections
3.1.4
Permanent Reference Electrodes
3.1.4.1
Permanent Reference Electrode Calibration
3.1.4.2
Installation
3.2
BOLTED AND RIVETED TANKS
3.3
GASEOUS EVOLUTION
3.4
CRITERIA FOR CATHODIC PROTECTION
3.4.1
Minimum
3.4.2
Maximum
3.5
FIELD QUALITY CONTROL
3.5.1
Destructive Testing
3.5.2
Wire for Power Service
3.5.3
Initial Cathodic Protection System Field Testing
3.5.4
Initial Cathodic Protection System Field Test Report
SECTION 26 42 22.00 20
Page 2
3.5.5
One Year Warranty Period Testing
3.5.6
Final Field Testing
3.6
DEMONSTRATION
3.6.1
Instruction to Government Personnel
-- End of Section Table of Contents --
SECTION 26 42 22.00 20
Page 3
**************************************************************************
USACE / NAVFAC / AFCEC / NASA
UFGS-26 42 22.00 20 (January 2008)
---------------------------------Preparing Activity: NAVFAC
Superseding
UFGS-26 42 22.00 20 (April 2006)
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are in agreement with UMRL dated January 2016
**************************************************************************
SECTION 26 42 22.00 20
CATHODIC PROTECTION SYSTEM FOR STEEL WATER TANKS
01/08
**************************************************************************
NOTE: This guide specification covers the
requirements for steel water tank cathodic
protection systems using impressed current systems
and galvanic anodes.
Adhere to UFC 1-300-02 Unified Facilities Guide
Specifications (UFGS) Format Standard when editing
this guide specification or preparing new project
specification sections. 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, suggestions and recommended changes for
this guide specification are welcome and should be
submitted as a Criteria Change Request (CCR).
**************************************************************************
**************************************************************************
The Preparing Activity, NAVFAC LANT, has significant
experience and technical expertise in the area of
field testing and commissioning of new systems. If
Reach-back support is required, the technical
representative (electrical engineer) editing this
document for a specific project shall contact the
NAVFAC Atlantic Capital Improvements Electrical
Engineering (CIEE) office for consultation during
the design stage of the project and include the
bracketed option in the 'Submittals' section.
**************************************************************************
**************************************************************************
NOTE: One of the major factors influencing
selection of the type of cathodic protection system
is the resistivity of the water involved. When the
water resistivity is higher than 10,000 ohm-cm,
SECTION 26 42 22.00 20
Page 4
impressed current systems are usually used. Other
considerations include availability of electric
power and the costs of installation, operation and
maintenance. Where relatively small amounts of
current are required or where energy is not readily
available and water resistivity is low, galvanic
anodes may be applied. Where relatively large
currents are required and reasonable access to power
is available, the impressed current system will
generally be found to be more economical. The
requirements for the cathodic protection systems
should be determined by a corrosion engineer
following the criteria, design, and installation
recommendations included in the National Association
of Corrosion Engineers Standard; RPO-388, "Impressed
Current Cathodic Protection of Internal Submerged
Surfaces of Steel Water Tanks", and RP0-196,
"Galvanic Anode Cathodic Protection of Internal
Submerged Surfaces of Steel Water Tanks."
**************************************************************************
**************************************************************************
NOTE: The following information should be shown on
the drawings:
1. Dimensions of tank, including riser (if tank is
elevated), structural supports and overflow.
2. Locations of all anodes, reference electrodes,
junction boxes, test boxes, rectifiers, power
connections, wire and conduit.
3.
Installation details for anodes and rectifiers.
4. Electrical single-line diagrams, elevations,
limiting dimensions, and equipment ratings which are
not covered in the specification.
5. Remote indicating or control requirements.
**************************************************************************
PART 1
1.1
GENERAL
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.
SECTION 26 42 22.00 20
Page 5
NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)
ANSI C119.1
(2011) Electric Connectors - Sealed
Insulated Underground Connector Systems
Rated 600 Volts
NEMA FU 1
(2012) Low Voltage Cartridge Fuses
NEMA ICS 6
(1993; R 2011) Enclosures
NEMA RN 1
(2005; R 2013) Polyvinyl-Chloride (PVC)
Externally Coated Galvanized Rigid Steel
Conduit and Intermediate Metal Conduit
NEMA ST 1
(1988; R 1994; R 1997) Specialty
Transformers (Except General Purpose Type)
NEMA TC 2
(2013) Standard for Electrical Polyvinyl
Chloride (PVC) Conduit
NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)
NFPA 70
(2014; AMD 1 2013; Errata 1 2013; AMD 2
2013; Errata 2 2013; AMD 3 2014; Errata
3-4 2014; AMD 4-6 2014) National
Electrical Code
U.S. DEPARTMENT OF DEFENSE (DOD)
MIL-I-1361
(1985; Rev C; Notice 1 1991) Instrument
Auxiliaries, Electrical Measuring:
Shunts, Resistors and Transformers
UNDERWRITERS LABORATORIES (UL)
UL 44
(2014; Reprint Feb 2015)
Thermoset-Insulated Wires and Cables
UL 467
(2007) Grounding and Bonding Equipment
UL 486A-486B
(2013; Reprint Feb 2014) Wire Connectors
UL 489
(2013; Reprint Mar 2014) Molded-Case
Circuit Breakers, Molded-Case Switches,
and Circuit-Breaker Enclosures
UL 506
(2008; Reprint Oct 2013) Specialty
Transformers
UL 510
(2005; Reprint Jul 2013) Polyvinyl
Chloride, Polyethylene and Rubber
Insulating Tape
UL 514A
(2013) Metallic Outlet Boxes
UL 514B
(2012; Reprint Nov 2014) Conduit, Tubing
and Cable Fittings
SECTION 26 42 22.00 20
Page 7
NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)
ANSI C119.1
(2011) Electric Connectors - Sealed
Insulated Underground Connector Systems
Rated 600 Volts
NEMA FU 1
(2012) Low Voltage Cartridge Fuses
NEMA ICS 6
(1993; R 2011) Enclosures
NEMA RN 1
(2005; R 2013) Polyvinyl-Chloride (PVC)
Externally Coated Galvanized Rigid Steel
Conduit and Intermediate Metal Conduit
NEMA ST 1
(1988; R 1994; R 1997) Specialty
Transformers (Except General Purpose Type)
NEMA TC 2
(2013) Standard for Electrical Polyvinyl
Chloride (PVC) Conduit
NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)
NFPA 70
(2014; AMD 1 2013; Errata 1 2013; AMD 2
2013; Errata 2 2013; AMD 3 2014; Errata
3-4 2014; AMD 4-6 2014) National
Electrical Code
U.S. DEPARTMENT OF DEFENSE (DOD)
MIL-I-1361
(1985; Rev C; Notice 1 1991) Instrument
Auxiliaries, Electrical Measuring:
Shunts, Resistors and Transformers
UNDERWRITERS LABORATORIES (UL)
UL 44
(2014; Reprint Feb 2015)
Thermoset-Insulated Wires and Cables
UL 467
(2007) Grounding and Bonding Equipment
UL 486A-486B
(2013; Reprint Feb 2014) Wire Connectors
UL 489
(2013; Reprint Mar 2014) Molded-Case
Circuit Breakers, Molded-Case Switches,
and Circuit-Breaker Enclosures
UL 506
(2008; Reprint Oct 2013) Specialty
Transformers
UL 510
(2005; Reprint Jul 2013) Polyvinyl
Chloride, Polyethylene and Rubber
Insulating Tape
UL 514A
(2013) Metallic Outlet Boxes
UL 514B
(2012; Reprint Nov 2014) Conduit, Tubing
and Cable Fittings
SECTION 26 42 22.00 20
Page 7
UL 6
(2007; Reprint Nov 2014) Electrical Rigid
Metal Conduit-Steel
UL 83
(2014) Thermoplastic-Insulated Wires and
Cables
UL 854
(2004; Reprint Nov 2014) Standard for
Service-Entrance Cables
1.2
DEFINITIONS
Unless otherwise specified or indicated, electrical and electronics terms
used in these specifications, and on the drawings, shall be as defined in
IEEE 100.
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.
The Guide Specification technical editors have
designated those items that require Government
approval, due to their complexity or criticality,
with a "G". Generally, other submittal items can be
reviewed by the Contractor's Quality Control
System.
Only add a ā€œGā€ to an item, 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.
An "S" following a submittal item indicates that the
submittal is required for the Sustainability
Notebook to fulfill federally mandated sustainable
requirements in accordance with Section 01 33 29
SUSTAINABILITY REPORTING.
Choose the first bracketed item for Navy, Air Force
and NASA projects, or choose the second bracketed
item for Army projects.
**************************************************************************
**************************************************************************
NOTE: If submittal review by NAVFAC LANT is
specifically desired, the responsible Field
SECTION 26 42 22.00 20
Page 8
Engineering Command shall coordinate with Code CIEE
during the design process. Include bracketed option
and add appropriate information in Section 01 33 00
"SUBMITTAL PROCEDURES" to coordinate with the
special requirements.
**************************************************************************
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.] [Code CIEE, NAVFAC LANT, will review and approve
[all][the "Field Quality Control"] submittals requiring Government
approval.] Submittals with an "S" are for inclusion in the Sustainability
Notebook, in conformance to Section 01 33 29 SUSTAINABILITY REPORTING.
Submit the following in accordance with Section 01 33 00 SUBMITTAL
PROCEDURES:
SD-02 Shop Drawings
Rectifier installation
Anode installation
Wiring and schematic diagram
Anode junction boxes
SD-03 Product Data
[
Rectifiers; G[, [_____]]]
[
Impressed current anodes; G[, [_____]]]
[
Galvanic anodes; G[, [_____]]]
Permanent reference electrodes; G[, [_____]]
Shunt resistors
Include certified test data for the impressed current anodes
stating the maximum recommended anode current output density and
the rate of gaseous production if any at that current density.
SD-07, Certificates
Qualifications of Corrosion Engineer; G[, [_____]]
Icing Climate Requirements; G[, [_____]]
Submit certification from the manufacturer indicating
conformance with the paragraph entitled "Icing Climate
Requirements."
SD-09, Manufacturer's Field Reports
Initial Cathodic Protection System Field Test Report; G[, [_____]]
One Year Warranty Period Cathodic Protection System Field Test
SECTION 26 42 22.00 20
Page 9
Report; G[, [_____]]
Final Cathodic Protection System Field Test Report; G[, [_____]]
SD-10 Operation and Maintenance Data
Cathodic Protection System, Data Package 5; G[, [_____]]
Submit in accordance with Section 01 78 23 OPERATION AND
MAINTENANCE DATA.
1.4
SERVICES OF CORROSION ENGINEER
Obtain the services of a Corrosion Engineer to supervise, inspect and test
the installation of the cathodic protection system(s). Corrosion Engineer
refers to a registered professional engineer with certification or
licensing that includes education and experience in cathodic protection of
buried or submerged metal structures, or a person certified by the National
Association or Corrosion Engineers at the level of Corrosion Specialist or
Cathodic Protection Specialist. Such a person shall have not less than
[three] [five] [_____] years experience in the cathodic protection of water
[storage tanks] or submerged structures. Submit evidence of the
qualifications of corrosion engineer to the Contracting Officer for review
and approval.
1.5
QUALITY ASSURANCE
1.5.1
Regulatory Requirements
In each of the publications referred to herein, consider the advisory
provisions to be mandatory, as though the word, "shall" had been
substituted for "should" wherever it appears. Interpret references in
these publications to the "authority having jurisdiction," or words of
similar meaning, to mean the Contracting Officer. Equipment, materials,
installation, and workmanship shall be in accordance with the mandatory and
advisory provisions of NFPA 70 unless more stringent requirements are
specified or indicated.
1.5.2
Standard Products
Provide materials and equipment that are products of manufacturers
regularly engaged in the production of such products which are of equal
material, design and workmanship. Products shall have been in satisfactory
commercial or industrial use for 2 years prior to bid opening. The 2-year
period shall include applications of equipment and materials under similar
circumstances and of similar size. The product shall have been on sale on
the commercial market through advertisements, manufacturers' catalogs, or
brochures during the 2-year period. Where two or more items of the same
class of equipment are required, these items shall be products of a single
manufacturer; however, the component parts of the item need not be the
products of the same manufacturer unless stated in this section.
1.5.2.1
Alternative Qualifications
Products having less than a 2-year field service record will be acceptable
if a certified record of satisfactory field operation for not less than
6000 hours, exclusive of the manufacturers' factory or laboratory tests, is
furnished.
SECTION 26 42 22.00 20
Page 10
1.5.2.2
Material and Equipment Manufacturing Date
Products manufactured more than 3 years prior to date of delivery to site
shall not be used, unless specified otherwise.
1.6
WARRANTY
The equipment items shall be supported by service organizations which are
reasonably convenient to the equipment installation in order to render
satisfactory service to the equipment on a regular and emergency basis
during the warranty period of the contract.
1.7
VERIFICATION OF SITE CONDITIONS
Coordinate and properly relate this work to the work of all trades. Verify
that the general locations of the structures to receive protection are
shown. Visit the premises and become familiar with all details of the work
and working conditions, verify existing conditions in the field, determine
the exact locations of structures to be protected, and advise the
Contracting Officer of any discrepancy before performing any work. Take
resistivity measurement of the water and analysis of the water and provide
this data with shop drawings of the system for approval.
PART 2
PRODUCTS
**************************************************************************
NOTE: Anode materials, as well as all cathodic
protection equipment to be installed in the tank,
should be chosen such that there is no contamination
of potable water. The type of system to be used,
either impressed current or galvanic, must be
determined. Select the paragraphs entitled
"Impressed Current Anodes" or "Galvanic Anodes"
below.
**************************************************************************
2.1
[IMPRESSED CURRENT ANODES
**************************************************************************
NOTE: Choose from anodes listed below. The
chemical composition listed are examples only. The
actual compositions required shall be determined to
provide adequate and economical service, and conform
to the standards established by NACE.
**************************************************************************
[2.1.1
High-Silicon Chromium Bearing Cast Iron
**************************************************************************
NOTE: High-silicon cast iron anodes are rugged,
long lasting, and commonly used in icing and
non-icing climates. They are generally classified
as relatively non-sacrificial having a consumption
rate between 227 to 454 grams 0.5 to 1.0 pounds per
ampere-year in most fresh waters.
**************************************************************************
ASTM A518/A518M.
characteristics:
Provide cast iron anodes with the following
SECTION 26 42 22.00 20
Page 11
2.4.8.1
[Transformer Taps
**************************************************************************
NOTE: A minimum of five coarse and five fine taps
is recommended to provide sufficient voltage
adjustment. Variacs should not be used where
subjected to corrosive or marine air atmospheres.
**************************************************************************
[Transformer taps, [5] [_____] coarse, [5] [_____] fine.]
[_____].
]2.4.8.2
[Variac.]
[Automatic Controls
Provide control system capable of maintaining a preselected tank-to-water
potential, within plus or minus 0.025 volt regardless of changes in water
chemistry, temperature, or water level in the tank. [Provide separate dc
output circuits, means of adjustment, reference electrodes, and metering
for the tank bowl and riser pipe.] Make provisions for readily changing
the range and limits of the operating potential.
]2.4.9
Output Voltage and Current Meters
Provide separate panel voltmeter and ammeter, not less than 63.5 mm 2 1/2
inch [round] [rectangular] 2 percent full scale accuracy at 30 degrees C
80 degrees F, temperature stability above and below 30 degrees C 80 degrees
F of at least 1 percent per 5 degrees C 10 degrees F. Provide toggle
switch for each meter.
2.4.10
Grounding Provisions
Grounding provisions shall [be as specified in Section 26 20 00 INTERIOR
DISTRIBUTION SYSTEM.] [comply with NFPA 70 and UL 467 including a ground
terminal in the cabinet.] The grounding conductor from the terminal to the
earth grounding system shall be solid or stranded copper not smaller than
No. 6 AWG. Provide an earth grounding system consisting of one or more
rods. Ground rods shall be [copper-clad steel conforming to UL 467]
[zinc-coated steel conforming to IEEE C135.30] [solid stainless steel] not
less than [16] [19] mm [5/8] [3/4] inch in diameter by [2.4] [3.1] m [8]
[10] feet in length. Drive rods full length into the earth. Sectional
type rods may be used.
2.4.11
Resistance to Ground
**************************************************************************
NOTE: Remove this paragraph if not required in the
project
**************************************************************************
Measure the resistance to ground using the fall-of-potential method
described in IEEE 81. The maximum resistance of driven ground shall not
exceed 25 ohms under normally dry conditions. If this resistance cannot be
obtained with a single rod, [_____] additional rods not less than 1.8 m 6
feet on centers, or if sectional type rods are used, [_____] additional
couple sections and drive with the first rod. In high-ground-resistance,
use UL listed chemically charged ground rods. If the resultant resistance
exceeds 25 ohms measured not less than 48 hours after rainfall, notify the
Contracting Officer immediately. Exothermically weld all connections below
grade. Exothermically weld connections above grade or use UL 467 approved
SECTION 26 42 22.00 20
Page 16
connectors.
2.4.12
Fuses
Cartridge-type fuses conforming to NEMA FU 1.
holders in each leg of the D.C. circuit.
2.4.13
Provide suitable fuse
Surge Protection
Protect silicon diodes by use of ac and dc lightning arresters or metal
oxide varistors against overvoltage surges and by current-limiting device
against overcurrent surges.
2.4.14
Efficiency
Overall efficiency of [65 percent] [90 percent] [_____] minimum when
operated at full output.
2.4.15
Rectifier Replacement/Spare Parts List
Provide identification and coverage for all parts of each component,
assembly, and accessory of the items subject to replacement in accordance
with Section 01 78 23 OPERATION AND MAINTENANCE DATA.
2.5
REFERENCE ELECTRODES
[Zinc][copper-copper sulfate] type provided with micro-pore diffusion
window for water contact and water-tight plug. Provide cells with No. [10]
[12] [_____] AWG, stranded copper conductor with 2.8 mm 110 mils [_____]
thick ASTM D1248, high molecular weight polyethylene (HMWPE) insulation
cable of sufficient length to extend to the [test station] [junction box]
without splicing. Reference electrodes shall have a minimum 15 year life,
stability of plus or minus 5 millivolts under 3 micro-amp load, and an
initial accuracy of plus or minus 10 millivolts referenced to a calibrated
portable reference electrode.
2.6
SHUNT RESISTORS
[0.01] [_____] ohm, [6] [_____] amp, with an accuracy of plus or minus one
percent. [Shunts shall conform to MIL-I-1361 [rating as shown]].
2.7
CONDUIT
[UL 6, rigid galvanized steel.] [Outlet boxes: UL 514A and Fitting:
UL 514B, threaded hubs.] [Metallic conduit and fittings to be
polyvinyl-chloride coated in accordance with [NEMA RN 1, Type A40] [
NEMA TC 2, Type EPC-40-PVC]]. Provide nonmetallic conduit conforming to
NEMA TC 2. Provide conduit support in accordance with NFPA 70.
2.8
CABLE OTHER THAN ANODE LEAD WIRES
**************************************************************************
NOTE: Any pinhole, cut, scratch or other damage to
the anode cable exposing bare copper to the
electrolyte will result in early failure of the
impressed current cathodic protection system. For
this reason, special, extra heavy insulation is used
on anode cable.
**************************************************************************
SECTION 26 42 22.00 20
Page 17
2.10
CLEVIS ASSEMBLIES
Provide clevis assemblies, 6.35 mm 1/4 inch flat steel with a spool opening
of 53.975 mm 2 1/8 inch, 114.3 mm 4 1/2 inch long to the centerline of the
spindle. Provide porcelain spools, with an outside diameter of 57.15 mm 2
1/4 inch and an overall height of 53.975 mm 2 1/8 inch.
2.11
PIN INSULATORS
Provide pin insulator assemblies, 100 mm 4 inches long overall and 6.35 mm
1/4 inch diameter aluminum bolt 19 mm 3/4 inch long attached to the flat
end with a aluminum nut and lock washer. Provide porcelain insulator of
non-conducting material with hard glazed finish. Provide insulator with a
hole through the bottom no smaller than 13 mm 1/2 inch diameter.
2.12
HANDHOLE ASSEMBLIES
Provide aluminum handhole covers, 175 mm 7 inches in diameter and 1.588 mm
1/16 inch thick and connected to insulating rubber gasket, 175 mm 7 inches
in diameter and 3.175 mm 1/8 inch thick. Cut handholes 150 mm 6 inches in
diameter. Provide handhole assemblies with 12.7 mm 1/2 inch bolts and 6.35
mm 1/4 inch plate clamping bars.
2.13
EXOTHERMIC WELD KITS
Provide exothermic weld kits specifically designed by the manufacturer for
welding the types of materials and shapes provided.
2.14
MANUFACTURER'S NAMEPLATE
Each item of equipment shall have a nameplate bearing the manufacturer's
name, address, model number, and serial number securely affixed in a
conspicuous place; the nameplate of the distributing agent will not be
acceptable.
2.15
FIELD FABRICATED NAMEPLATES
**************************************************************************
NOTE: Use the following paragraph where nameplates
are fabricated to identify specific equipment
designated on the drawings.
**************************************************************************
ASTM D709. Provide laminated plastic nameplates for each equipment
enclosure, relay, switch, and device; as specified or as indicated on the
drawings. Each nameplate inscription shall identify the function and, when
applicable, the position. Nameplates shall be melamine plastic, 3 mm 0.125
inch thick, white with [black] [_____] center core. Surface shall be matte
finish. Corners shall be square. Accurately align lettering and engrave
into the core. Minimum size of nameplates shall be 25 by 65 mm one by 2.5
inches. Lettering shall be a minimum of 6.35 mm 0.25 inch high normal
block style.
PART 3
3.1
EXECUTION
INSTALLATION
Electrical installations shall conform to IEEE C2, NFPA 70, and to the
SECTION 26 42 22.00 20
Page 20
requirements specified herein.
3.1.1
Anode Installation
**************************************************************************
NOTE: Proprietary systems of anode installations
are available for areas where icing is expected.
For such areas paragraph entitled "Icing Climates"
below should be included.
**************************************************************************
[IEEE C2] [NFPA 70].
3.1.1.1
[Icing Climate Requirements
Suspend anodes in a manner similar to that in non-icing climates, except
provisions shall be made to prevent the anodes and suspending cables from
being damaged by freezing or falling ice.
]3.1.1.2
Anode Placement
Arrange anodes in the tank [and riser pipe] as shown in the drawings [so
that protection can be provided to surfaces without exceeding potentials
[in the vicinity of the anodes] that will be detrimental to coatings].
Suspend anodes from roof [plate] [structure] by means of factory-installed
connecting wire designed to support the anodes in air [before submergence]
without failure of the electrical wire insulation or the electrical
conductors. Prevent contact between anode and tank surfaces such as
man-access hatches, ladders, heater pipes, and stay rods.
3.1.1.3
Anode Hangers
Anode hangers shall electrically insulate the anode suspending wire from
the tank steel.
3.1.1.4
Handholes
Provide a handhole having a diameter of 150 mm 6 inches in the tank roof
for each anode string to permit replacement or inspection of anodes.
3.1.2
Anode Connection
**************************************************************************
NOTE: A single split-bolt will work loose when
wires it connects are moved. Minimum of two split
bolts will prevent this from happening. In water
tanks, split bolts are used (above water line only)
because working space is limited and hydraulic or
mechanical compression tools may be cumbersome and
hazardous to use. At ground level or in trenches,
compression tools can be used conveniently, and
swedged sleeve connection produced by such tools is
more reliable than split bolts.
**************************************************************************
3.1.2.1
Anode Lead Wires
Electrically connect anodes to the positive D.C. header cable with
compression connectors or split bolts, or the header cable may terminate in
SECTION 26 42 22.00 20
Page 21
2.4.8.1
[Transformer Taps
**************************************************************************
NOTE: A minimum of five coarse and five fine taps
is recommended to provide sufficient voltage
adjustment. Variacs should not be used where
subjected to corrosive or marine air atmospheres.
**************************************************************************
[Transformer taps, [5] [_____] coarse, [5] [_____] fine.]
[_____].
]2.4.8.2
[Variac.]
[Automatic Controls
Provide control system capable of maintaining a preselected tank-to-water
potential, within plus or minus 0.025 volt regardless of changes in water
chemistry, temperature, or water level in the tank. [Provide separate dc
output circuits, means of adjustment, reference electrodes, and metering
for the tank bowl and riser pipe.] Make provisions for readily changing
the range and limits of the operating potential.
]2.4.9
Output Voltage and Current Meters
Provide separate panel voltmeter and ammeter, not less than 63.5 mm 2 1/2
inch [round] [rectangular] 2 percent full scale accuracy at 30 degrees C
80 degrees F, temperature stability above and below 30 degrees C 80 degrees
F of at least 1 percent per 5 degrees C 10 degrees F. Provide toggle
switch for each meter.
2.4.10
Grounding Provisions
Grounding provisions shall [be as specified in Section 26 20 00 INTERIOR
DISTRIBUTION SYSTEM.] [comply with NFPA 70 and UL 467 including a ground
terminal in the cabinet.] The grounding conductor from the terminal to the
earth grounding system shall be solid or stranded copper not smaller than
No. 6 AWG. Provide an earth grounding system consisting of one or more
rods. Ground rods shall be [copper-clad steel conforming to UL 467]
[zinc-coated steel conforming to IEEE C135.30] [solid stainless steel] not
less than [16] [19] mm [5/8] [3/4] inch in diameter by [2.4] [3.1] m [8]
[10] feet in length. Drive rods full length into the earth. Sectional
type rods may be used.
2.4.11
Resistance to Ground
**************************************************************************
NOTE: Remove this paragraph if not required in the
project
**************************************************************************
Measure the resistance to ground using the fall-of-potential method
described in IEEE 81. The maximum resistance of driven ground shall not
exceed 25 ohms under normally dry conditions. If this resistance cannot be
obtained with a single rod, [_____] additional rods not less than 1.8 m 6
feet on centers, or if sectional type rods are used, [_____] additional
couple sections and drive with the first rod. In high-ground-resistance,
use UL listed chemically charged ground rods. If the resultant resistance
exceeds 25 ohms measured not less than 48 hours after rainfall, notify the
Contracting Officer immediately. Exothermically weld all connections below
grade. Exothermically weld connections above grade or use UL 467 approved
SECTION 26 42 22.00 20
Page 16
connectors.
2.4.12
Fuses
Cartridge-type fuses conforming to NEMA FU 1.
holders in each leg of the D.C. circuit.
2.4.13
Provide suitable fuse
Surge Protection
Protect silicon diodes by use of ac and dc lightning arresters or metal
oxide varistors against overvoltage surges and by current-limiting device
against overcurrent surges.
2.4.14
Efficiency
Overall efficiency of [65 percent] [90 percent] [_____] minimum when
operated at full output.
2.4.15
Rectifier Replacement/Spare Parts List
Provide identification and coverage for all parts of each component,
assembly, and accessory of the items subject to replacement in accordance
with Section 01 78 23 OPERATION AND MAINTENANCE DATA.
2.5
REFERENCE ELECTRODES
[Zinc][copper-copper sulfate] type provided with micro-pore diffusion
window for water contact and water-tight plug. Provide cells with No. [10]
[12] [_____] AWG, stranded copper conductor with 2.8 mm 110 mils [_____]
thick ASTM D1248, high molecular weight polyethylene (HMWPE) insulation
cable of sufficient length to extend to the [test station] [junction box]
without splicing. Reference electrodes shall have a minimum 15 year life,
stability of plus or minus 5 millivolts under 3 micro-amp load, and an
initial accuracy of plus or minus 10 millivolts referenced to a calibrated
portable reference electrode.
2.6
SHUNT RESISTORS
[0.01] [_____] ohm, [6] [_____] amp, with an accuracy of plus or minus one
percent. [Shunts shall conform to MIL-I-1361 [rating as shown]].
2.7
CONDUIT
[UL 6, rigid galvanized steel.] [Outlet boxes: UL 514A and Fitting:
UL 514B, threaded hubs.] [Metallic conduit and fittings to be
polyvinyl-chloride coated in accordance with [NEMA RN 1, Type A40] [
NEMA TC 2, Type EPC-40-PVC]]. Provide nonmetallic conduit conforming to
NEMA TC 2. Provide conduit support in accordance with NFPA 70.
2.8
CABLE OTHER THAN ANODE LEAD WIRES
**************************************************************************
NOTE: Any pinhole, cut, scratch or other damage to
the anode cable exposing bare copper to the
electrolyte will result in early failure of the
impressed current cathodic protection system. For
this reason, special, extra heavy insulation is used
on anode cable.
**************************************************************************
SECTION 26 42 22.00 20
Page 17
Provide copper wire conforming to ASTM B3 and ASTM B8. Wires terminating
in a rectifier, junction box or test station shall have a cable
identification tag. Refer to paragraph 2.1.4 [_____] for anode lead wires.
2.8.1
AC Power Supply Wiring
[UL 83, Type [THW] [THWN] [TW]] [UL 44, Type RHW,] [UL 854, Type USE],
stranded [solid] copper conductors, gage (AWG) and color coded as indicated.
2.8.2
Anode Wire
Type CP [ASTM D1248, High Molecular Weight Polyethylene (HMWPE)] [cross
linked polyethylene (XLPE)] insulation, stranded copper conductors, gage
(AWG) as indicated.
The anode wire material shall sustain current densities of 100 ampere per
square meter 10.764 square feet in an oxygen generating electrolyte for 20
years. The manufacturer shall certify that a representative sample taken
from the same lot used to construct the anode, has been tested and meets
the following criteria:
a. The test cell sustains a current density of 10,000 ampere persquare
meter 10.764 square feet in a 15 weight percent sulfuric acid
electrolyte at 66 degrees C 150 degrees F without an increase in anode
to cathode potential of more than 1 volt.
b. The cell containing the anode shall be powered with a constant
current power supply for the 30 day test period.
c
The representative sample shall be 125 mm 5 inch in length taken
from the lot of wire that is to be used for the anode.
2.8.3
Rectifier DC Positive (Anode) Header Cable
Type CP [ASTM D1248, High Molecular Weight Polyethylene (HMWPE)] [cross
linked polyethylene (XLPE)] insulation, stranded copper conductors, gage
(AWG) as indicated. Refer to paragraph 2.1.4 [_____] for anode lead wires.
2.8.4
Cable Identification Tags
[Laminated plastic material with black letters on a yellow background]
[[Brass] [Stainless steel] material with stamped or engraved letters.]
Print letters and numbers a minimum 5 mm 3/16 inch in size. Provide
identifier legend [in accordance with the drawings] [_____].
2.8.5
Wire Connectors
UL 486A-486B.
2.8.6
Insulating Tape
UL 510.
2.8.7
Splices
[Splices are not permitted in submerged sections of anode lead wire or
anode header cable.] Provide splices with a compression connector on the
conductor, and insulation and waterproofing using one of the following
SECTION 26 42 22.00 20
Page 18
(3)
(4)
(5)
3.5.4
Across the bottom of the tank in a line between the two vertical
lines at [915] [_____] mm [3] [_____] foot intervals.
In at least [4] [_____] places which are close to anodes.
On a vertical line in the riser pipe beginning at the top of the
riser and continuing at [915] [_____] mm [3] [_____] foot
intervals until the bottom of the riser is reached.
Initial Cathodic Protection System Field Test Report
Submit a field test report of the cathodic protection system. Record on
applicable forms all rectifier measurements, anode output current
measurements, and structure-to-electrolyte measurements, including initial
potentials. Coordinate identification of rectifiers, anode junction boxes,
test locations, and test stations with the as-built drawings and provide
on system drawings in the report. Locate, correct, and report to the
Contracting Officer any short circuits encountered during the checkout of
the installed cathodic protection system.
3.5.5
One Year Warranty Period Testing
Inspect, test, and adjust the cathodic protection system [quarterly]
[semi-annually] [_____] for one year, [4] [2] [_____] interim inspections
total, to ensure its continued conformance with the criteria outlined
below. Commence the performance period for these tests upon the completion
of all cathodic protection work, including changes required to correct
deficiencies identified during initial testing, and preliminary acceptance
of the cathodic protection system by the Contracting Officer. The One Year
Warranty Period Cathodic Protection System Field Test Report, including
field data, shall be certified by the Contractor's corrosion engineer.
3.5.6
Final Field Testing
Conduct final field testing of the cathodic protection system utilizing the
same procedures specified under, "Initial Cathodic Protection System Field
Testing". Inspect, test, and adjust the cathodic protection system after
one year of operation to ensure its continued conformance with the criteria
outlined below. Commence the performance period for these tests upon the
completion of all cathodic protection work, including changes required to
correct deficiencies identified during initial testing, and preliminary
acceptance of the cathodic protection system by the Contracting Officer.
The Final Cathodic Protection System Field Test Report shall be certified
by the Contractor's corrosion engineer and included as an attachment to the
operation and maintenance manual in accordance with Section 01 78 23
OPERATION AND MAINTENANCE DATA.
3.6
3.6.1
DEMONSTRATION
Instruction to Government Personnel
**************************************************************************
NOTE: There are restrictions on the type and extent
of training. Training is usually on-site, 2 days or
less. Factory representatives or others provide
basic instructions to facility maintenance and
operation personnel. If more extensive training is
required, i.e., student travel, special consultants,
etc., consult the Contract Division Director and the
SECTION 26 42 22.00 20
Page 26
head of the Comptroller Department for assistance.
**************************************************************************
Furnish the services of competent instructors to give full instruction to
designated Government personnel in the adjustment, operation, and
maintenance of the specified systems and equipment, including pertinent
safety requirements as required. Instructors shall be thoroughly familiar
with all parts of the installation and shall be trained in operating theory
as well as practical operation and maintenance work. Instruction shall be
given during the first regular work week after the equipment or system has
been accepted and turned over to the Government for regular operation.
Provide [8] [_____] hours of instruction for [_____] personnel.
-- End of Section --
SECTION 26 42 22.00 20
Page 27
requirements specified herein.
3.1.1
Anode Installation
**************************************************************************
NOTE: Proprietary systems of anode installations
are available for areas where icing is expected.
For such areas paragraph entitled "Icing Climates"
below should be included.
**************************************************************************
[IEEE C2] [NFPA 70].
3.1.1.1
[Icing Climate Requirements
Suspend anodes in a manner similar to that in non-icing climates, except
provisions shall be made to prevent the anodes and suspending cables from
being damaged by freezing or falling ice.
]3.1.1.2
Anode Placement
Arrange anodes in the tank [and riser pipe] as shown in the drawings [so
that protection can be provided to surfaces without exceeding potentials
[in the vicinity of the anodes] that will be detrimental to coatings].
Suspend anodes from roof [plate] [structure] by means of factory-installed
connecting wire designed to support the anodes in air [before submergence]
without failure of the electrical wire insulation or the electrical
conductors. Prevent contact between anode and tank surfaces such as
man-access hatches, ladders, heater pipes, and stay rods.
3.1.1.3
Anode Hangers
Anode hangers shall electrically insulate the anode suspending wire from
the tank steel.
3.1.1.4
Handholes
Provide a handhole having a diameter of 150 mm 6 inches in the tank roof
for each anode string to permit replacement or inspection of anodes.
3.1.2
Anode Connection
**************************************************************************
NOTE: A single split-bolt will work loose when
wires it connects are moved. Minimum of two split
bolts will prevent this from happening. In water
tanks, split bolts are used (above water line only)
because working space is limited and hydraulic or
mechanical compression tools may be cumbersome and
hazardous to use. At ground level or in trenches,
compression tools can be used conveniently, and
swedged sleeve connection produced by such tools is
more reliable than split bolts.
**************************************************************************
3.1.2.1
Anode Lead Wires
Electrically connect anodes to the positive D.C. header cable with
compression connectors or split bolts, or the header cable may terminate in
SECTION 26 42 22.00 20
Page 21
a junction box for connection with all anodes cables. Use a minimum of two
split bolts for each connection if split bolts are used. Mark each of the
wires terminating in the junction box.
3.1.2.2
Anode Header Cable
Provide header cable on the [underside of the roof] [wall] with
electrically insulating hangers which enter the tank near the roof line
from an externally mounted junction box. External wiring shall be in
conduit. Mark each of the wires terminating in the junction box.
3.1.2.3
Splices
**************************************************************************
NOTE: Splices are not allowed below water level.
**************************************************************************
Locate under-roof electric wire splices above the high water line and seal
water-tight using a minimum of two 1/2-lap layers of butyl rubber tape
followed by two 1/2-lap layers of plastic tape.
3.1.3
Rectifiers
**************************************************************************
NOTE: For impressed current systems only.
**************************************************************************
3.1.3.1
Rectifier Installation
Location and mounting as indicated. Assemble and attach equipment
enclosures to [wall] [post] [pad] in accordance with the manufacturer's
instructions. Handle wires to prevent stretching or kinking the conductors
or damaging the insulation. Use lubricants when pulling wires into
conduits. Bond the equipment enclosures to a grounding electrode.
3.1.3.2
Wire-To-Tank Connections
Connect the structure wire to the tank [_____] [by use of an exothermic
weld kit] [by brazing]. Clean the structure surface by scraping, filing,
or wire brushing to produce a clean, bright surface. [Weld connections
using the exothermic weld kits in accordance with the manufacturer's
instructions. Test the integrity of the weld, prior to coating, by
striking with a 908 gram two pound hammer.] [Cover connections and
surrounding cleaned surface with an electrically insulating coating
compatible with the existing coating.]
3.1.4
3.1.4.1
Permanent Reference Electrodes
Permanent Reference Electrode Calibration
Calibrate permanent reference electrodes against a portable electrode in
the presence of the Contracting Officer or his approved representative
before installation. Calibrate in a test tank containing water with the
same composition as the tank to be protected. Permanent electrode shall
measure a reference potential agreeing with that measured by the portable
electrode within plus or minus 0.010 volt when the sensing windows of the
two electrodes being compared are not more than 2 mm 1/6 inch apart but not
touching. Remove permanent reference electrodes not within this potential
range from the construction site by the end of the day and replace at the
SECTION 26 42 22.00 20
Page 22
Contractor's expense. The testing provision applies to replacement
reference electrodes as well.
3.1.4.2
Installation
Provide permanent reference electrodes at points in the tank [and riser
pipe] which monitor minimum and maximum tank[/riser]-to-water potentials[,
regulate the automatic control system] [_____], and maintain continuous
immersion. Sensing windows of reference electrodes shall be equidistant to
and located within 25 mm one inch of the steel tank[/rise pipe] surface and
be fixed in position, preventing contact with tank wall or appurtenances.
3.2
BOLTED AND RIVETED TANKS
Ensure electrical continuity of joining components.
3.3
GASEOUS EVOLUTION
Provide for possible evolution of gases from anode reaction and ventilation
requirements.
3.4
CRITERIA FOR CATHODIC PROTECTION
Conduct in accordance with [NACE SP0388][ and ][NACE SP0196].
3.4.1
Minimum
The criterion for cathodic protection shall be a negative potential of at
least 0.85 volt as measured between the tank[/riser pipe] and a
copper-copper sulfate reference electrode across the tank[/riser pipe] to
water interface. Determination of this potential shall be made with the
protective current applied to the tank [and riser] for a minimum of [24]
[_____] hours. Voltage drops must be considered for valid interpretation
of this voltage measurement. The method of voltage drop consideration
shall be identified by the Contractor's corrosion engineer.
3.4.2
Maximum
The potential between a copper-copper sulfate reference electrode and the
tank[/riser pipe] at any point shall not be more negative than a negative
1.1 volt potential taken with the [electrode located within 25 mm one inch
of the tank[/riser pipe] surface but not touching it] [protective current
interrupted instantaneously or modulated] to minimize the voltage drop
effect.
3.5
FIELD QUALITY CONTROL
The Government reserves the right to witness tests. Notify the Contracting
Officer [5] [_____] days prior to performing each field test. Quality
control for the cathodic protection system shall consist of the following:
a.
Initial field testing by the contractor upon construction.
b.
Warranty period field testing by the Contractor.
c.
Final field testing by the contractor after one year of service.
**************************************************************************
NOTE: Additional testing may be required, based
SECTION 26 42 22.00 20
Page 23
upon the specific project or design. All tests
listed below may not be required. Designer should
consider the project requirements for selection of
test procedures.
**************************************************************************
3.5.1
Destructive Testing
Perform the tests in the presence of the Contracting Officer. Include the
cost of an additional anode with the longest lead wire for the destructive
test in his bid. Choose one completed anode of each type with lead wires
at random for destructive testing and submit to a static pull test.
Conduct a lead wire pull test to confirm the minimum lead wire tensile load
capacity indicated in paragraph entitled "Attachment of Anode Lead Wire"
and following subparagraphs. [The anode shall also be cut into sections to
verify conformance with this specification. Check such items as
anode-to-wire connection, complete encapsulation of the wire connector, and
wire to anode electrical resistance.] [Failure of the test anode to
conform to this specification can be cause for rejecting all anodes from
the same lot as the test anode. Mark all rejected anodes on the ends with
a 6" high "X" using yellow spray paint. Remove all failed anodes from the
job site by the end of the day. Replace any rejected anodes at
contractor's expense. The destructive testing provision also applies to
replacement anodes as well.]
**************************************************************************
NOTE: Paragraph entitled "Wire for Power Service"
for impressed current systems only.
**************************************************************************
[3.5.2
Wire for Power Service
Test wire for power service at 600 volts or less to determine that the
wiring system and equipment are free from short circuits and grounds [by a
minimum of two megohms]. Perform the test with a megohmmeter having a
500-volt rating.
]3.5.3
Initial Cathodic Protection System Field Testing
Upon completion of the installation, fill tank to maximum working level,
and the Contractor's corrosion engineer shall test and inspect the cathodic
protection system in the presence of the Contracting Officer or his
designated representative. Record test data, including date, time, and
location of testing and submit to the Contracting Officer. Contractor
shall correct and retest, at his expense, deficiencies in the materials and
installation observed during the tests and inspections. Take measurements
with voltmeters having input impedance not less than 10 megohms. Testing
shall include the following:
a.
Base potential tests: At least [one week] [24 hours] [_____] after the
tank has been filled, but before energizing of the cathodic protection
system, measure the base (native) structure-to-water potentials of the
tank [and riser]. The locations of these measurements shall be
identical to the locations specified for measuring energized
structure-to-water potentials.
b.
Permanent reference electrode tests: Verify proper operation and
calibration of the reference electrode (s) including the entire
reference electrode wiring circuit. Verify calibration of the
SECTION 26 42 22.00 20
Page 24
reference electrode in accordance with the paragraph entitled
"Permanent Reference Electrode Calibration". [Potential differences
between the two electrodes of the same generic type should not exceed
[10] [15] millivolts.] [Zinc permanent reference electrodes should be
within the range of minus 1000 to minus 1150 millivolts when calibrated
with a copper-copper sulfate reference electrode.] Remove permanent
reference electrodes not within these potential differences from the
construction site by the end of the day and replace at the contractor's
expense. The testing provision also applies to replacement reference
electrodes as well.
**************************************************************************
NOTE: For impressed current systems only.
**************************************************************************
[c.
Rectifier testing: Upon completion of the installation, "Base
Potential" tests, and "Permanent Reference Electrode" tests, energize
and adjust the rectifier to provide current to the anode at a level
that will protect the tank[/riser pipe] in accordance with the NACE
criteria listed in this specification. Measure dc output of the
rectifier and current output of each anode at different rectifier
settings. Measure the current outputs across the installed shunts.
Verify these readings using portable, calibrated meters and shunts.
Testing shall demonstrate if the rectifier system is capable of
functioning properly as required to provide effective cathodic
protection.]
**************************************************************************
NOTE: For galvanic systems only.
**************************************************************************
[d.
Anode-to-water potential and anode output current tests: Upon
completion of the installation, "Base Potential" tests, and "Permanent
Reference Electrode" tests, measure anode-to-water potential of each
anode or each anode string with the anodes disconnected. After
connecting the anodes to the tank [through junction box], measure
current output of each anode or anode string across the calibrated
shunt.]
**************************************************************************
NOTE: For all types of cathodic protection systems.
**************************************************************************
e.
Energized tank[/riser pipe]-to-water potential tests: After operation
of the cathodic protection system for at least 24 hours [one week]
[_____], perform the tank[/riser pipe]-to-water measurements listed in
the following five paragraphs with a portable reference electrode
placed within 25 mm one inch of, but not touching, the tank[/riser
pipe] wall and bottom surfaces and appurtenances.
(1)
On a vertical line midway between two anode strings beginning at
a point 305 mm one foot below water level and continuing at point
915 mm 3 feet apart until the bottom of the tank is reached.
(2)
On a second vertical line midway between two anode strings on the
opposite side of the tank from the first vertical line beginning
at a point 305 mm one foot below water level and continuing at
points 915 mm 3 feet apart until the bottom of the tank is reached.
SECTION 26 42 22.00 20
Page 25
(3)
(4)
(5)
3.5.4
Across the bottom of the tank in a line between the two vertical
lines at [915] [_____] mm [3] [_____] foot intervals.
In at least [4] [_____] places which are close to anodes.
On a vertical line in the riser pipe beginning at the top of the
riser and continuing at [915] [_____] mm [3] [_____] foot
intervals until the bottom of the riser is reached.
Initial Cathodic Protection System Field Test Report
Submit a field test report of the cathodic protection system. Record on
applicable forms all rectifier measurements, anode output current
measurements, and structure-to-electrolyte measurements, including initial
potentials. Coordinate identification of rectifiers, anode junction boxes,
test locations, and test stations with the as-built drawings and provide
on system drawings in the report. Locate, correct, and report to the
Contracting Officer any short circuits encountered during the checkout of
the installed cathodic protection system.
3.5.5
One Year Warranty Period Testing
Inspect, test, and adjust the cathodic protection system [quarterly]
[semi-annually] [_____] for one year, [4] [2] [_____] interim inspections
total, to ensure its continued conformance with the criteria outlined
below. Commence the performance period for these tests upon the completion
of all cathodic protection work, including changes required to correct
deficiencies identified during initial testing, and preliminary acceptance
of the cathodic protection system by the Contracting Officer. The One Year
Warranty Period Cathodic Protection System Field Test Report, including
field data, shall be certified by the Contractor's corrosion engineer.
3.5.6
Final Field Testing
Conduct final field testing of the cathodic protection system utilizing the
same procedures specified under, "Initial Cathodic Protection System Field
Testing". Inspect, test, and adjust the cathodic protection system after
one year of operation to ensure its continued conformance with the criteria
outlined below. Commence the performance period for these tests upon the
completion of all cathodic protection work, including changes required to
correct deficiencies identified during initial testing, and preliminary
acceptance of the cathodic protection system by the Contracting Officer.
The Final Cathodic Protection System Field Test Report shall be certified
by the Contractor's corrosion engineer and included as an attachment to the
operation and maintenance manual in accordance with Section 01 78 23
OPERATION AND MAINTENANCE DATA.
3.6
3.6.1
DEMONSTRATION
Instruction to Government Personnel
**************************************************************************
NOTE: There are restrictions on the type and extent
of training. Training is usually on-site, 2 days or
less. Factory representatives or others provide
basic instructions to facility maintenance and
operation personnel. If more extensive training is
required, i.e., student travel, special consultants,
etc., consult the Contract Division Director and the
SECTION 26 42 22.00 20
Page 26
head of the Comptroller Department for assistance.
**************************************************************************
Furnish the services of competent instructors to give full instruction to
designated Government personnel in the adjustment, operation, and
maintenance of the specified systems and equipment, including pertinent
safety requirements as required. Instructors shall be thoroughly familiar
with all parts of the installation and shall be trained in operating theory
as well as practical operation and maintenance work. Instruction shall be
given during the first regular work week after the equipment or system has
been accepted and turned over to the Government for regular operation.
Provide [8] [_____] hours of instruction for [_____] personnel.
-- End of Section --
SECTION 26 42 22.00 20
Page 27
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement