ARMY UFGS-46 73 10-2011 FLOATING COVER FOR SLUDGE-DIGESTION TANKS.pdf

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1、*USACE / NAVFAC / AFCESA / NASA UFGS-46 73 10 (February 2011)-Preparing Activity: USACE SupersedingUFGS-44 46 20 (April 2006)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated April 2011*SECTION TABLE OF CONTENTSDIVISION 46 - WATER AND WASTEWATER EQUIPMENTSECTION 46 7

2、3 10FLOATING COVER FOR SLUDGE-DIGESTION TANKS02/11PART 1 GENERAL1.1 REFERENCES1.2 SYSTEM DESCRIPTION1.2.1 General Design Requirements1.2.2 Non-Gasholding Floating Cover1.2.3 Gasholding Floating Cover1.2.4 Coordination1.2.5 Structural Design Requirements1.3 SUBMITTALS1.4 QUALIFICATIONS1.5 DELIVERY, S

3、TORAGE, AND HANDLING1.6 EXTRA MATERIALSPART 2 PRODUCTS2.1 GENERAL MATERIAL AND EQUIPMENT REQUIREMENTS2.1.1 Standard Products2.1.2 Nameplates2.1.3 Special Tools2.2 FRAME ASSEMBLY2.3 ROOF DECK, WOOD2.4 ROOF DECK, CAST-IN-PLACE CONCRETE2.5 ROOF DECK, PRECAST CONCRETE2.6 ROOF DECK, STEEL2.7 ROOF INSULAT

4、ION2.8 ROOFING2.9 FLASHING2.10 RIM SKIRT FOR GASHOLDING COVERS2.11 WALL GUIDES AND ROLLERS2.12 APPURTENANCES2.12.1 Gas Dome2.12.2 Gas Pipe Housing2.12.3 Drain Sumps and Access Wells2.12.4 Manhole2.12.5 Entrance HatchSECTION 46 73 10 Page 1Provided by IHSNot for ResaleNo reproduction or networking pe

5、rmitted without license from IHS-,-,-2.12.6 Sampling Well2.12.7 Pressure-Vacuum Relief Unit2.13 FABRICATIONPART 3 EXECUTION3.1 EXAMINATION3.2 WELDING3.3 PAINTING3.3.1 Preparation and Application3.3.2 Coating Testing3.3.3 Coating Repair3.4 FIELD ERECTION3.5 FRAMED INSTRUCTIONS3.6 TESTING3.7 MANUFACTU

6、RERS SERVICES3.8 FIELD TRAINING- End of Section Table of Contents -SECTION 46 73 10 Page 2Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-*USACE / NAVFAC / AFCESA / NASA UFGS-46 73 10 (February 2011)-Preparing Activity: USACE SupersedingUFGS-44 46 20

7、 (April 2006)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated April 2011*SECTION 46 73 10FLOATING COVER FOR SLUDGE-DIGESTION TANKS02/11*NOTE: This guide specification covers the requirements for floating cover for sludge-digestion tank.Adhere to UFC 1-300-02 Unified

8、 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 ins

9、ert 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).*PART 1 GENERAL1.1

10、 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

11、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 the issue dates.SECTION 46 73 10 Page 3Provided by IHSNot for ResaleNo reproduction or networking permi

12、tted without license from IHS-,-,-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 reference

13、d. The publications are referred to within the text by the basic designation only.AMERICAN INSTITUTE OF STEEL CONSTRUCTION (AISC)AISC 325 (2005) Steel Construction ManualANSI/AISC 360 (2005) Specification for Structural Steel BuildingsAMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR-CONDITIONING E

14、NGINEERS (ASHRAE)ASHRAE FUN IP (2009; Errata 2010) Fundamentals Handbook, I-P EditionASHRAE FUN SI (2009; Errata 2010) Fundamentals Handbook, SI EditionAMERICAN WOOD PROTECTION ASSOCIATION (AWPA)AWPA P5 (2009) Standard for Waterborne PreservativesASME INTERNATIONAL (ASME)ASME B31.1 (2010) Power Pipi

15、ngASME BPVC SEC IX (2010) BPVC Section IX-Welding and Brazing QualificationsASTM INTERNATIONAL (ASTM)ASTM A167 (1999; R 2009) Standard Specification for Stainless and Heat-Resisting Chromium-Nickel Steel Plate, Sheet, and StripASTM A36/A36M (2008) Standard Specification for Carbon Structural SteelAS

16、TM B 209 (2007) Standard Specification for Aluminum and Aluminum-Alloy Sheet and PlateASTM B 209M (2007) Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate (Metric)ASTM B 370 (2009) Standard Specification for Copper Sheet and Strip for Building ConstructionSECTION 46 73 10 Page 4

17、Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-THE SOCIETY FOR PROTECTIVE COATINGS (SSPC)SSPC SP 10/NACE No. 2 (2007) Near-White Blast Cleaning1.2 SYSTEM DESCRIPTION1.2.1 General Design Requirements*NOTE: Include only non-gasholding covers or only g

18、asholding covers, not both.*Floating cover shall conform to the general design requirements specified and as shown.1.2.2 Non-Gasholding Floating Cover*NOTE: A ceiling plate serves two functions: first, it submerges floating scum; second, it protects the structural truss assembly from corrosive diges

19、ter contents and gas. However, the ceiling plate may be deleted if its worth does not exceed the cost. Covers with attic space designs will be seal welded to prevent entrance of digester gas into attic space.*The floating cover shall be a rigid steel structure designed to float on the liquid content

20、s of the digestion tank as indicated. The cover shall consist of structural steel radial truss sections arched radial beams with cover plates welded to trusses beams and to each other to form a gas-tight support system for roof, sidewalls, ceiling and appurtenances required for a complete installati

21、on. The ceiling shall be of welded steel plate and shall float on the liquid surface, keeping floatable scum submerged and in contact with actively digesting sludge. The plate shall slope radially upward from a vertical rim plate at the tank wall to a circular gas dome at the center of the tank. The

22、 installed weight of the digester cover and appurtenances, including any necessary concrete ballast, shall be sufficient to provide a static gas pressure of at least _ Pa inches water column. Additional supports shall be provided as required to maintain the stability of the cover when it is subjecte

23、d to uneven live loads.1.2.3 Gasholding Floating Cover*NOTE: All volume under gasholder cover (ceiling) and in upper 300 mm (12 in.) of sidesheet cylinder may not be considered as usable gas storage because gas in this portion of holder cannot be withdrawn without a sudden loss of gas pressure.Coord

24、inate with paragraph Non-Gasholding Floating Cover.*The gasholding floating cover shall be a rigid steel structure designed to float on a gas layer above the liquid contents of the digestion tank as SECTION 46 73 10 Page 5Provided by IHSNot for ResaleNo reproduction or networking permitted without l

25、icense from IHS-,-,-indicated. The cover shall consist of structural steel radial truss sections arched radial beams with cover plates welded to trusses beams and to each other to form a gas-tight support system for roof, sidewalls, ceiling and appurtenances required for a complete installation. The

26、 ceiling shall be of welded steel plate and shall float on a gas layer above the liquid contents of the digester. The ceiling shall provide scum submergence when the gas pressure is reduced and the cover is allowed to settle on the digester contents. The plate shall slope radially upward from the ve

27、rtical sidewall to a circular gas dome at the center of the tank. An extended rim skirt shall extend below the digester liquid level to contain the produced gas. The gasholder shall have an effective gas storage capacity of _ cubic meters feet at an operating pressure of _ Pa inches water column. Th

28、e cover shall be capable of vertical liquid surface travel of _ mm feet with minimum to maximum gas storage available over this range of travel. Volume under gasholder cover ceiling and in upper _ 300 mm 12 inch of sidesheet cylinder shall not be considered as usable gas storage.Text1.2.4 Coordinati

29、onThe floating cover and the digester gas, heating, and mixing system shall be coordinated to ensure proper operation and interface between the two items.1.2.5 Structural Design Requirements*NOTE: Live, snow, and vacuum loads depend upon geographical area of installation. Dead and roof loads vary de

30、pending on type of roof construction and equipment to be installed on the cover. Various manufacturers must be consulted to determine loads to be specified.Coordinate with paragraph Non-Gasholding Floating Cover.*The floating cover shall be self-supporting when resting in an empty tank and shall be

31、designed to withstand a live, snow, and vacuum load of _ kPa psf and a dead load and roof load of _ kPa psf. Design and construction shall be in accordance with the applicable sections of AISC 325and ANSI/AISC 360. Ceiling plates shall not be considered as a structural member in calculations.1.3 SUB

32、MITTALS*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 in

33、dicates 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 SECTION 46 73 10 Page 6Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-complex and can be

34、 reviewed through the Contractors 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

35、 “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

36、 “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“ desi

37、gnation; submittals not having a “G“ designation are for Contractor Quality Control approval. 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

38、01 33 00 SUBMITTAL PROCEDURES:SD-02 Shop DrawingsField ErectionDrawings containing complete wiring and schematic diagrams and any other details required to demonstrate that the system has been coordinated and will function as a unit. Drawings shall show proposed layout and anchorage of equipment and

39、 appurtenances, and equipment relationship to other parts of the work including clearances for maintenance and operation.SD-03 Product DataFloating CoverA complete list of equipment and material, including manufacturers descriptive data and technical literature, performance charts and curves, catalo

40、g cuts, and installation instructions.Spare PartsSpare parts data for each different item of material and equipment specified.Framed InstructionsA copy of the instructions proposed to be framed and posted.SECTION 46 73 10 Page 7Provided by IHSNot for ResaleNo reproduction or networking permitted wit

41、hout license from IHS-,-,-SD-06 Test ReportsTestingCoating TestingPerformance test reports in booklet form showing all field tests performed to adjust each component and all field tests performed to prove compliance with the specified performance criteria, upon completion and testing of the installe

42、d system. Each test report shall indicate the final position of controls.SD-10 Operation and Maintenance DataOperating and Maintenance Manuals; G; G, _Six _ copies of operation and six _ copies of maintenance manuals for the equipment furnished. One complete set prior to performance testing and the

43、remainder upon acceptance. Operating manuals shall detail the step-by-step procedures required for system startup, operation, and shutdown. Operation manuals shall include the manufacturers name, model number, parts list, and brief description of all equipment and their basic operating features. Mai

44、ntenance manuals shall list routine maintenance procedures, possible breakdowns and repairs, and troubleshooting guides. Maintenance manuals shall include piping and equipment layout and simplified wiring and control diagrams of the system as installed. Manuals shall be approved prior to the field training course.1.4 QUALIFICA