ARMY UFGS-26 42 19 10-2008 CATHODIC PROTECTION SYSTEMS (IMPRESSED CURRENT) FOR LOCK MITER GATES《人字闸门锁定用(外加电流)阴极保护系统》.pdf

1、*USACE / NAVFAC / AFCESA UFGS-26 42 19.10 (November 2008)-Preparing Activity: USACE (CW) SupersedingUFGS-26 42 19.10 (April 2006)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated October 2008*SECTION TABLE OF CONTENTSDIVISION 26 - ELECTRICALSECTION 26 42 19.10CATHODI

2、C PROTECTION SYSTEMS (IMPRESSED CURRENT)FOR LOCK MITER GATES11/08PART 1 GENERAL1.1 UNIT PRICES1.2 REFERENCES1.3 SYSTEM DESCRIPTION1.3.1 General Description1.3.2 Performance Requirements1.3.2.1 First Criterion1.3.2.2 Second Criterion1.3.3 Contractor Quality Control1.3.3.1 General1.3.3.2 Reporting1.3.

3、4 Modification of Design1.4 SUBMITTALS1.5 QUALITY ASSURANCE1.5.1 Qualifications1.5.2 Contractors Responsibilities1.5.3 Corrosion Expert1.5.4 Pre-Installation Meeting1.6 DELIVERY, STORAGE, AND HANDLING1.7 PROJECT/SITE CONDITIONS1.8 WARRANTY1.9 SYSTEM COMMISSIONING1.9.1 General1.9.2 Insulation Testing

4、1.10 EXTRA MATERIALSPART 2 PRODUCTS2.1 MATERIALS AND EQUIPMENT2.1.1 Direct Current Cables2.1.1.1 Anode Lead Cables2.1.1.2 Rectifier and Terminal Cabinets Connection Cables2.1.2 Cable in Conduit2.2 RECTIFIERS AND AUXILIARY EQUIPMENT2.2.1 GeneralSECTION 26 42 19.10 Page 1Provided by IHSNot for ResaleN

5、o reproduction or networking permitted without license from IHS-,-,-2.2.2 Cabinets2.2.3 Wheeled Rectifier Cabinets (Alternate 1)2.2.4 Stationary Cabinets (Alternate 2)2.2.5 Circuit Breakers2.2.6 Step-down Transformers2.2.7 Rectifier Transformers2.2.8 Rectifiers2.2.9 Ammeter and Voltmeter2.2.10 Curre

6、nt Monitoring Shunt2.2.11 Ammeter and Voltmeter Switches2.2.12 Control and Instrument Panel2.2.12.1 Tap Bars2.2.12.2 DC Output Terminals2.2.12.3 Components Identification2.2.13 Anode Cable Leads2.2.14 Surge Arresters2.2.15 Wiring Diagram2.2.16 Resistor and Anode Terminal Cabinet Wiring Diagram2.3 CO

7、NDUIT AND FITTINGS2.3.1 Nonmetallic Conduit2.3.2 Rigid Metal Conduit2.3.3 Conduit Fittings and Outlets2.4 RESISTOR AND ANODE TERMINAL CABINETS2.5 IMPRESSED CURRENT ANODES AND MATERIALS2.5.1 General Requirements2.5.2 Ceramic Precious Metal Oxide Coated Anodes2.5.2.1 Conductive Precious Metal Oxide Ce

8、ramic Coating2.5.2.2 Anode Substrate Material2.5.3 Hi-Silicon Cast-Iron Anodes2.5.3.1 Chemical Composition (Nominal)2.5.3.2 Electrical Resistivity2.5.3.3 Physical Properties (Nominal)2.5.4 Ceramic Coated Titanium Anodes (Disk Type)2.5.4.1 General2.5.4.2 Impact Protection for Disk Anode Cables2.5.4.3

9、 Number of Ceramic Coated Titanium Disk Anodes2.5.5 Hi-Silicon Cast Iron Button Anodes2.5.5.1 General2.5.5.2 High-Silicon, Cast-Iron Anodes (Button Type)2.5.5.3 Anodes Number2.5.5.4 Assembly2.5.5.5 Impact Protection for Button Anode Cables2.5.6 Ceramic Coated Titanium Segmented Rod Anodes2.5.7 Hi-Si

10、licon Cast Iron Sausage Anode Strings2.6 IMPACT PROTECTION FOR RODS AND SAUSAGE-STRING ANODES2.6.1 PVC Pipe and Metal Couplings2.6.2 Protective Angle Irons2.6.2.1 PVC Piping2.6.2.2 Painting2.7 MARKINGS2.7.1 General2.9.2 Rectifier CabinetsPART 3 EXECUTION3.1 EXAMINATION3.2 INSTALLATION3.3 WIRING3.3.1

11、 Gate Structure at Control RoomSECTION 26 42 19.10 Page 2Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.3.2 Rectifier on the Lock Wall3.3.3 Wiring on the Gate Structure3.4 ROD AND SAUSAGE ANODE INSTALLATION3.4.1 Metal Pipe Couplings for PVC Pipe3.

12、4.2 Assembly of Titanium Rod Anode3.4.3 Suspension of Anode Rod or String Assemblies3.5 DISK AND BUTTON ANODE INSTALLATION3.5.1 General3.5.2 Impact Protection Pipes Installation3.5.3 Disk Anode Installation3.5.4 Button Anode Installation3.6 RECTIFIER CABINET INSTALLATION3.7 RESISTOR AND ANODE TERMIN

13、AL CABINETS INSTALLATION3.8 REPAIR OF EXISTING WORK3.9 SYSTEM COMPONENT CIRCUIT RESISTANCE MEASUREMENT3.10 STRUCTURE-TO-REFERENCE CELL POTENTIAL MEASUREMENTS3.11 RECTIFIER ADJUSTMENT3.11.1 Locations of Structure-to-Reference Cell3.11.2 Polarization Decay3.12 RECORDING OF MEASUREMENTS3.13 OPERATION A

14、ND MAINTENANCE INSTRUCTIONS3.13.1 Operating Instructions3.13.2 Maintenance Instructions3.14 TRAINING COURSE- End of Section Table of Contents -SECTION 26 42 19.10 Page 3Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-*USACE / NAVFAC / AFCESA UFGS-26

15、42 19.10 (November 2008)-Preparing Activity: USACE (CW) SupersedingUFGS-26 42 19.10 (April 2006)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated October 2008*SECTION 26 42 19.10CATHODIC PROTECTION SYSTEMS (IMPRESSED CURRENT)FOR LOCK MITER GATES11/08*NOTE: This guide

16、 specification covers the requirements for cathodic protection systems for lock miter gates.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

17、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 an

18、d telephone number, is on the Internet.Recommended changes to a UFGS should be submitted as a Criteria Change Request (CCR).*PART 1 GENERAL*NOTE: Cathodic Protection should be installed on those portions of the gates submerged at normal pool levels. The faces of the gates should be protected to uppe

19、r pool stages, except that the downstream face of the lower gates must be protected to the lower pool level.This guide specification includes the technical requirements for the types of equipment normally provided in a cathodic protection system, and is based upon the premise that the system is desi

20、gned by a qualified engineering firm hired by the Government to provide a complete cathodic protection system design, including detailed specifications SECTION 26 42 19.10 Page 4Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-(which contain performan

21、ce criteria) and drawings which the successful Contractor can then use to construct the system. The engineering firm must provide the design services of a Corrosion Expert(s) to design, supervise, and inspect system installation and test, energize, and adjust the completed system installation. The C

22、orrosion Expert is a person, who by reason of thorough knowledge of the physical sciences and the principles of engineering and mathematics, acquired by professional education and related practical experience, is qualified to engage in the practice of corrosion control of Lock R 1992) Requirements f

23、or Electrical Analog Indicating InstrumentsASTM INTERNATIONAL (ASTM)ASTM A 518/A 518M (1999; R 2003) Standard Specification for Corrosion-Resistant High-Silicon Iron CastingsASTM D 1248 (2005) Standard Specification for Polyethylene Plastics Extrusion Materials for Wire and CableSECTION 26 42 19.10

24、Page 6Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASTM D 789 (2007) Determination of Relative Viscosity and Moisture Content of Polyamide (PA)NACE INTERNATIONAL (NACE)NACE SP0169 (2007) Control of External Corrosion on Underground or Submerged Me

25、tallic Piping SystemsNATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)NEMA 250 (2003) Enclosures for Electrical Equipment (1000 Volts Maximum)NEMA AB 1 (2002) Molded-Case Circuit Breakers, Molded Case Switches, and Circuit-Breaker EnclosuresNEMA C80.1 (2005) Standard for Electrical Rigid Steel Co

26、nduit (ERSC)NEMA FB 1 (2007) Standard for Fittings, Cast Metal Boxes, and Conduit Bodies for Conduit, Electrical Metallic Tubing, and CableNEMA FU 1 (2002; R 2007) Low Voltage Cartridge FusesNEMA ST 1 (1988; R 1997) Standard for Specialty Transformers (Except General Purpose Type)NEMA ST 20 (1992; R

27、 1997) Standard for Dry-Type Transformers for General ApplicationsNEMA TC 2 (2003) 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. ARMY CORPS OF ENGINEERS (USACE)CERL

28、Tech Rep FM-95/05 (1994) Field Evaluation of Cathodic Protection Systems Using Ceramic-Coated Anodes for Lock and Dam GatesEM 1110-2-2704 (2004) Cathodic Protection Systems for Civil Works Structures1.3 SYSTEM DESCRIPTION1.3.1 General DescriptionFurnish, install, test and place in service a complete

29、 cathodic protection system for the lock miter gates consisting of all equipment, wiring, and wiring devices necessary to produce a continuous flow of direct current from the anodes in the water electrolyte to the gate surfaces to, adequately and efficiently, protect the surfaces of the metal struct

30、ures SECTION 26 42 19.10 Page 7Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-against corrosion where the surfaces are in contact with the water. The metallic surfaces of the gates need only be protected to upper pool stages, except that the downstr

31、eam side of the lower gate shall be protected to lower pool level. This is in addition to the protective coating on the gates. Provide, prior to system installation, detailed design calculations, bill of materials lists and drawings of the cathodic protection system. The detailed drawings shall show

32、 the system installation including arrangement and locations of all anodes, terminal boxes, conduit routing and test facilities to be installed for corrosion control on the submerged surfaces of the gates. The Contractor furnished materials list, design calculations and drawings shall be approved by

33、 the Contracting Officer prior to purchasing, delivering or installing any of the cathodic protection system. These specifications together with the approved materials list, design calculations and drawings shall provide the minimum requirements of this contract. The cathodic protection system shall

34、 be furnished complete and in operating condition as further defined later in this specification.1.3.2 Performance RequirementsFinal test and adjust the system such that the cathodic protection system is providing corrosion control for the submerged surfaces of the lock miter gates in accordance wit

35、h the following paragraphs taken from Section 6 of NACE SP0169.1.3.2.1 First CriterionA negative (cathodic) voltage of at least a minus 850 millivolts “instant-off“ potential, as measured with respect to a calibrated, saturated copper-copper sulfate reference electrode (CSE) over 90 percent of each

36、gate leaf face, and at least minus 800 millivolts “instant-off“ at all other locations. These requirements do not necessarily include those areas within 0.61 m 2 ft of the sill, quoin and miter of each gate (refer to Paragraph 1.3.3.2 of NACE SP0169). The above criteria shall be achieved without the

37、 “instant-off“ potential exceeding minus 1100 millivolts at any location. Determination of this voltage shall be made with the cathodic protection system in operation. Correction shall be made for IR drop using “instant-off“ potential measurements (all operating cathodic protection systems shall be

38、simultaneously interrupted). If digital meters are used to obtain these measurements, the second reading displayed on the digital voltmeter after interruption of the rectifier current shall be interpreted as the “instant-off“ reading.1.3.2.2 Second CriterionA second criterion may be used for those g

39、ate submerged surfaces within 0.61 m 2 ft of each gate sill, quoin, and miter to ensure that the operating conditions are providing cathodic protection. This criterion is a minimum cathodic polarization voltage decay of 100 millivolts provided that a potential of at least minus 750 millivolts “insta

40、nt-off“ potential as measured with respect to a calibrated, saturated copper-copper sulfate reference electrode (CSE) is also obtained. Polarization shift measurements shall be made within 0.305 m 1 ft of the sill plate at the quoin, at 0.61 m 2 ft intervals along the gate bottom, and at the miter o

41、n each gate leaf face. This criterion cannot be used until the criterion in paragraph 1.3.3.1 of NACE SP0169 for the remaining gate submerged surfaces have been maintained for a minimum 1-week period. This allows time for the cathodic protection system to polarize the gate metal. The “instant-off“ p

42、otential shall be measured between the structure surface and a saturated SECTION 26 42 19.10 Page 8Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-copper-copper sulfate reference cell immersed in the electrolyte directly adjacent to the structure. In

43、terrupting the protective current and measuring the polarization decay thereafter shall determine this polarization voltage shift. When the protective current is initially interrupted, an immediate voltage shift will occur. The second voltage reading observed after the immediate voltage shift shall

44、be recorded and used as the base reading from which to measure polarization decay. Readings shall then be taken each 10 minutes thereafter and the voltage readings and time intervals recorded. The total time for achieving this decay shall be 4 hours or less.1.3.3 Contractor Quality Control1.3.3.1 Ge

45、neralEstablish and maintain quality control for all operations to assure compliance with contract requirements and maintain records of this quality control for all construction operations, including, but not limited to, the following:a. Designb. Materials.c. Assembly and workmanshipd. Installation.e

46、. Testing.1.3.3.2 ReportingThe original and two copies of these records and tests, as well as corrective action taken, shall be furnished daily _ to the Contracting Officer.1.3.4 Modification of DesignNo modifications of the design of the cathodic protection system as specified and shown on the Contractors approved drawings shall be made except with the express written approval of the Contracting Officer. The minimum design requirements specified herein shall be met. All such proposed modifications shall be fully described and submitted to the Contracting