ARMY UFGS-26 42 17 00 10-2008 CATHODIC PROTECTION SYSTEM (IMPRESSED CURRENT)《(外加电流)阴极保护系统》.pdf

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1、*USACE / NAVFAC / AFCESA / NASA UFGS-26 42 17.00 10 (November 2008)-Preparing Activity: USACE SupersedingUFGS-26 42 17.00 10 (April 2006)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated October 2008*SECTION TABLE OF CONTENTSDIVISION 26 - ELECTRICALSECTION 26 42 17.0

2、0 10CATHODIC PROTECTION SYSTEM (IMPRESSED CURRENT)11/08PART 1 GENERAL1.1 REFERENCES1.2 SYSTEM DESCRIPTION1.2.1 General Requirements1.2.2 Contractors Modifications1.3 SUBMITTALS1.4 QUALITY ASSURANCE1.4.1 Services of “Corrosion Expert“1.4.2 Isolators1.4.3 Anodes and Bond Wires1.4.4 Surge Protection1.4

3、.5 Sacrificial Anodes1.4.6 Nonmetallic Pipe Systems1.4.6.1 Coatings1.4.6.2 Tracer Wire1.5 DELIVERY, STORAGE, AND HANDLING1.6 EXTRA MATERIALSPART 2 PRODUCTS2.1 IMPRESSED CURRENT ANODES2.1.1 Bare High Silicon Cast-Iron Anodes2.1.1.1 Chemical Composition (Nominal)2.1.1.2 Electrical Resistivity2.1.1.3 P

4、hysical Properties (Nominal)2.1.2 Bare Graphite Anodes2.1.3 Canister Contained Anodes2.1.4 Anode Connecting Cables2.1.5 Mixed Metal Oxide Anodes2.1.5.1 Conductive Material2.1.5.2 Anode Life Test2.1.5.3 Canister Contained Mixed Metal Oxide Anodes2.1.5.4 Anode Connecting Cables2.1.5.5 Canister Connect

5、ion Cables2.1.5.6 Deep Anode Connection CablesSECTION 26 42 17.00 10 Page 1Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-2.2 RECTIFIERS AND ASSOCIATED EQUIPMENT2.2.1 Rectifier Unit2.2.1.1 Transformer2.2.1.2 Rectifiers2.2.1.3 Meters2.2.1.4 Circuit B

6、reaker2.2.1.5 Fuses2.2.2 Cabinet Construction2.2.2.1 Wiring Diagram2.2.2.2 Grounding Provisions2.2.2.3 Resistance to Ground2.2.2.4 Cabinet Paint System2.2.3 Wiring2.2.4 Oil Immersed Enclosures2.3 COKE BREEZE2.3.1 Calcined Petroleum Coke Breeze (Dry)2.3.1.1 Electrical Resistivity2.3.1.2 General Backf

7、ill Specifications2.3.2 Metallurgical Coke Breeze (Processed)2.3.2.1 Electrical Resistivity (Nominal)2.3.2.2 General Backfill Specifications2.4 MISCELLANEOUS MATERIALS2.4.1 Electrical Wire2.4.1.1 Anode Connecting Wire2.4.1.2 Anode Header Cable2.4.1.3 Test Wires2.4.1.4 Resistance Wire2.4.2 Deep Anode

8、 Ground Bed Casing2.4.3 Anode Centering Device for Deep Anode Ground Beds2.4.4 Conduit2.4.5 Test Boxes and Junction Boxes2.4.6 Vent Pipes2.4.7 Polyethylene Insulation2.4.7.1 High Molecular Weight Polyethylene2.4.7.2 High Density Polyethylene2.4.8 Test Stations2.4.9 Calibrated Shunts2.4.10 Sealing an

9、d Dielectric Compound2.4.11 Protective Covering2.4.11.1 Pipeline Metallic Components2.4.11.2 Field Joints2.4.11.3 Inspection of Pipe Coatings2.4.11.4 Above Ground Piping System2.4.12 Preformed Sheaths2.4.13 Epoxy Potting Compound2.4.14 Backfill Shields2.4.15 Electrical Tape2.4.16 Cable Marker Tape2.

10、4.17 Electrically Isolating Pipe Joints2.4.17.1 Threaded Fittings2.4.17.2 Electrically Isolating Pipe Joints2.4.18 Electrically Conductive Couplings2.4.19 Joint and Continuity Bonds2.4.19.1 Resistance Bonds2.4.19.2 Stray Current Measurements2.4.20 Electrical Isolation of Structures2.5 MAGNESIUM ANOD

11、ES2.5.1 Composition2.5.2 Packaged AnodesSECTION 26 42 17.00 10 Page 2Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-2.5.3 Lead Wires2.5.4 Connection Wires2.5.5 Insulation2.5.6 Conduit Steel2.5.7 Tape2.5.8 Backfill Shields2.5.9 Electrical Connections

12、2.5.10 Anode Installation2.6 LEAD WIRE CONNECTIONSPART 3 EXECUTION3.1 CRITERIA OF PROTECTION3.1.1 Iron and Steel3.1.2 Aluminum3.1.3 Copper Piping3.2 GROUND BED INSTALLATION3.2.1 Shallow Ground Beds3.2.1.1 Horizontally Buried Bare Anodes3.2.1.2 Vertically Buried Bare Anodes3.2.1.3 Horizontally Buried

13、 Canister-Contained Anodes3.2.1.4 Vertically Buried Canister-Contained Anodes3.2.1.5 Cable Protection3.2.1.6 Multiple Anode Systems3.2.1.7 Distributed Anode Systems3.2.2 Deep Anode Ground Beds3.2.2.1 Anode Centering3.2.2.2 Casing3.2.2.3 Casing Insulation3.2.2.4 Anode Requirements3.2.2.5 Anode Lead W

14、ire3.2.2.6 Anode Cables3.2.2.7 Anode and Cable Installation3.2.2.8 Backfill3.2.2.9 Cable Marker Tape3.2.2.10 Pavement Inserts3.3 MAGNESIUM ANODE INSTALLATION3.3.1 Installation of Packaged Anodes3.3.2 Underground Metal Pipe Line3.3.3 Lead and Resistance Wire Splices3.3.4 Magnesium Anodes for Metallic

15、 Components3.4 MISCELLANEOUS INSTALLATION3.4.1 Rectifier Installation3.4.2 Wire Connections3.4.2.1 Wire Splicing3.4.2.2 Steel Surfaces3.4.3 Pipe Joints3.4.3.1 Electrical Continuity3.4.3.2 Electrical Isolation of Structures3.4.4 Dissimilar Metals3.4.5 Ferrous Valves3.4.6 Brass or Bronze Valves3.4.7 M

16、etal Pipe Junction3.4.8 Casing3.4.9 Test Stations3.5 TRAINING COURSE3.6 TESTS AND MEASUREMENTS3.6.1 Baseline Potentials3.6.2 Isolation TestingSECTION 26 42 17.00 10 Page 3Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.6.2.1 Insulation Checker3.6.2

17、.2 Cathodic Protection Meter3.6.3 Anode Output3.6.4 Electrode Potential Measurements3.6.5 Location of Measurements3.6.5.1 Coated Piping or Conduit3.6.5.2 Underground Tanks3.6.6 Casing Tests3.6.7 Interference Testing3.6.8 Holiday Test3.6.9 Recording Measurements- End of Section Table of Contents -SEC

18、TION 26 42 17.00 10 Page 4Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-*USACE / NAVFAC / AFCESA / NASA UFGS-26 42 17.00 10 (November 2008)-Preparing Activity: USACE SupersedingUFGS-26 42 17.00 10 (April 2006)UNIFIED FACILITIES GUIDE SPECIFICATIONS

19、References are in agreement with UMRL dated October 2008*SECTION 26 42 17.00 10CATHODIC PROTECTION SYSTEM (IMPRESSED CURRENT)11/08*NOTE: This guide specification covers the requirements for a cathodic protection system using impressed current anodes.Edit this guide specification for project specific

20、 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

21、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).*PART 1 GENERAL1.1

22、 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 Wizards Check Reference

23、feature when you add a RID outside of the Sections Reference Article to automatically place the reference in the Reference Article. Also use the Reference Wizards Check Reference feature to update SECTION 26 42 17.00 10 Page 5Provided by IHSNot for ResaleNo reproduction or networking permitted witho

24、ut license from IHS-,-,-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 ref

25、erenced. The publications are referred to within the text by the basic designation only.ASTM INTERNATIONAL (ASTM)ASTM A 53/A 53M (2007) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and SeamlessASTM B 418 (2006) Standard Specification for Cast and Wrought Galvanic

26、 Zinc AnodesASTM B 843 (2007) Standard Specification for Magnesium Alloy Anodes for Cathodic ProtectionASTM D 1248 (2005) Standard Specification for Polyethylene Plastics Extrusion Materials for Wire and CableINSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)IEEE C135.30 (1988) Zinc-Coated Fer

27、rous Ground Rods for Overhead or Underground Line ConstructionIEEE Std 81 (1983) Guide for Measuring Earth Resistivity, Ground Impedance, and Earth Surface Potentials of a Ground System (Part 1)Normal MeasurementsNACE INTERNATIONAL (NACE)NACE RP0193 (2001) External Cathodic Protection of On-Grade Ca

28、rbon Steel Storage Tank BottomsNACE SP0169 (2007) Control of External Corrosion on Underground or Submerged Metallic Piping SystemsNACE SP0188 (2006) Discontinuity (Holiday) Testing of New Protective Coatings on Conductive SubstratesNACE SP0572 (2007) Design, Installation, Operation and Maintenance

29、of Impressed Current Deep GroundbedsNATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)NEMA C80.1 (2005) Standard for Electrical Rigid Steel SECTION 26 42 17.00 10 Page 6Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Conduit (ERSC)NEMA TC 2 (2003)

30、Standard for Electrical Polyvinyl Chloride (PVC) Tubing and ConduitNATIONAL FIRE PROTECTION ASSOCIATION (NFPA)NFPA 70 (2007; AMD 1 2008) National Electrical Code - 2008 EditionU.S. NATIONAL ARCHIVES AND RECORDS ADMINISTRATION (NARA)40 CFR 280 Technical Standards and Corrective Action Requirements fo

31、r Owners and Operators of Underground Storage Tanks (UST)49 CFR 192 Transportation of Natural and Other Gas by Pipeline: Minimum Federal Safety Standards49 CFR 195 Transportation of Hazardous Liquids by PipelineUNDERWRITERS LABORATORIES (UL)UL 467 (2007) Standard for Grounding and Bonding EquipmentU

32、L 506 (2000; Rev thru May 2006) Standard for Specialty TransformersUL 510 (2005; Rev thru Aug 2005) Polyvinyl Chloride, Polyethylene, and Rubber Insulating TapeUL 514A (2004; Rev thru Aug 2007) Standard for Metallic Outlet BoxesUL 6 (2007) Standard for Electrical Rigid Metal Conduit-Steel1.2 SYSTEM

33、DESCRIPTION1.2.1 General Requirementsa. Provide a complete, operating impressed current cathodic protection system in accordance with NFPA 70, the applicable federal, state and local regulations, and the requirements of this contract. In addition to the minimum requirements of these specifications,

34、construction of gas pipelines and associated cathodic protection systems shall be in compliance with 49 CFR 192 and construction of hazardous liquid pipelines, and associated cathodic protection system shall be in compliance with 49 CFR 195 and construction and installation of underground fuel stora

35、ge tanks and associated cathodic protection system shall be in compliance with 40 CFR 280.b. The system includes planning, inspecting the installation, adjusting and testing cathodic protection and test system using rectifiers and impressed current anodes, supplemented with sacrificial anodes as nee

36、ded, for utilities and equipment shown. The cathodic SECTION 26 42 17.00 10 Page 7Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-protection system shall also include cables, connectors, splices, corrosion protection test stations, ace power panels,

37、and any other equipment required for a complete operating system providing the specified protection. The cathodic protection system includes (a) calculations for rectifier, anodes, and any recommendations for supplementing or changing the minimum design criteria to provide the specified potentials a

38、nd (b) equipment, wiring, and wiring devices necessary to produce a continuous flow of direct current from anodes in the soil electrolyte to the pipe surfaces.Submit Detail Drawings as specified in the Submittals paragraph. The installation shall meet the specified protection criteria for a 25 year

39、life.1.2.2 Contractors ModificationsThe specified system is based on an impressed current system supplemented with magnesium anodes. The Contractor may modify the cathodic protection system after review of the project, site verification and analysis if the proposed modifications include the impresse

40、d current anodes and rectifiers and will provide better overall system performance. The modifications shall be fully described, shall be approved by the Contracting Officer and shall meet the following criteria. The proposed system shall achieve a minimum pipe-to-soil “Instant Off“ potential of minu

41、s 850 millivolts with reference to a saturated copper-copper sulfate reference cell on the underground metallic components of the piping tanks _. Take resistivity measurements of the soil in the vicinity of the pipes tanks _ and ground bed sites; based upon the measurements taken, adjust current and

42、 voltage of the rectifier as required to produce a minimum of minus 850 millivolts “Instant Off“ potential between the structure being tested and the reference cell. This potential shall be obtained over 95 percent of the metallic area without the “Instant Off“ potential exceeding 1200 millivolts.1.

43、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 it

44、em 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 Contractors Quality Control system. Only add a “G” if the submittal is sufficiently important

45、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 (

46、RMS) are: “AE“ for Architect-Engineer; “DO“ for District Office SECTION 26 42 17.00 10 Page 8Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-(Engineering Division or other organization in the District Office); “AO“ for Area Office; “RO“ for Resident Office; and “PO“ fo