VA 23 50 11-2011 BOILER PLANT MECHANICAL EQUIPMENT.pdf

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1、05-11 23 50 11 - 1 SECTION 23 50 11 BOILER PLANT MECHANICAL EQUIPMENT SPEC WRITER NOTES: 1. Delete between /-/ if not applicable to project. Also delete any other item or paragraph not applicable to the project and renumber the paragraphs. 2. References to pressure in this section are gage pressure

2、unless otherwise noted. 3. The spec writer shall review the Physical Security Design Manual for VA Facilities to determine and include any Mission Critical or Life Safety requirements called out. 4. Contract drawings must include (as applicable) the VA National CAD Standards listed below: SD235011-0

3、1 Flash Tank SD235011-02 Chemical Feed System, Pumped Type SD235011-05 Boiler Blowoff Tank SD235011-06 Water Sample Coolers Boiler Water and Feedwater SD235011-07 Continuous Blowdown Heat Recovery Standard Piping Diagram SD235011-08 Boiler Chemical Feed System Shot Type SD235011-10 Anchoring Equipme

4、nt Packaged Boiler and Deaerator and Condensate Storage Tanks PART 1 - GENERAL 1.1 DESCRIPTION Feedwater deaerator, condensate and boiler feed pumps, condensate storage tank, fuel oil pumping and heating, compressed air systems, blowoff tank, blowdown heat recovery, chemical treatment systems, steam

5、 vent silencer, and other equipment that supports the operation of the boilers. 1.2 RELATED WORK A. Section 09 91 00, PAINTING. B. Section 23 05 11, COMMON WORK RESULTS FOR HVAC and STEAM GENERATION. C. Section 23 05 51, NOISE and VIBRATION CONTROL FOR BOILER PLANT. D. Section 23 07 11, HVAC, PLUMBI

6、NG, and BOILER PLANT INSULATION. E. Section 23 21 11, BOILER PLANT PIPING SYSTEMS. F. Section 22 31 11, WATER SOFTENERS. G. Section 22 67 21, WATER DEALKALIZING SYSTEM. H. Section 23 08 11, DEMONSTRATIONS and TESTS FOR BOILER PLANT. Provided by IHSNot for ResaleNo reproduction or networking permitte

7、d without license from IHS-,-,-05-11 23 50 11 - 2 I. Section 23 08 00, COMMISSIONING OF HVAC SYSTEMS. Requirements for commissioning, systems readiness checklists, and training 1.3 SUBMITTALS A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, and SAMPLES. B. Feedwater Deaera

8、tor with Storage Tank and Accessories: 1. Drawings showing arrangement and overall dimensions of feedwater deaerator including storage tank. Show locations of tank-mounted devices. Show locations and sizes of pipe connections and access openings. Show design of all shell, head and nozzle welds. 2. W

9、eight of entire assembly empty and flooded. 3. Catalog data, drawings and specification sheets showing design and construction of feedwater deaerator, storage tank, recycle pumps, water flow control valves, safety valve, overflow control valve, water level and overflow control systems, vent orifice,

10、 vacuum breaker, alarm switches and all accessories. 4. Performance data and pressure and temperature limitations of feedwater deaerator, recycle pumps, water flow/level control valve and control system, safety valve, overflow control valve, vent orifice, vacuum breaker, alarm switches and all acces

11、sories. 5. Catalog data on oxygen test kit. 6. Oxygen sample and chemical feed probe design. 7. Deaerator inlet pressure requirements - steam and water. SPEC WRITER NOTE: Delete the following subparagraphs if not applicable. /8. Packaged feedwater deaerator/feedwater pump units: Boiler feedwater pum

12、p suction and discharge pipe sizing and arrangement. Design of support framework and access platforms./ /9. Seismic design of support framework for packaged system./ C. Condensate Storage Tank and Accessories: 1. Drawings showing arrangement and overall dimensions of tank and supports. Show location

13、s and sizes of all pipe connections and access openings. 2. Weight of entire assembly empty and flooded. 3. Design and construction (including pressure and temperature limitations) of tank, continuous blowdown heat exchanger (if provided), control valves, water level control system, level alarm swit

14、ches and all accessories. 4. Performance data on control valves and continuous blowdown heat exchanger (if provided). Refer to drawings (Schedules) for requirements. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-05-11 23 50 11 - 3 5. Interior Coati

15、ng: Material specification, service limitations, instructions for application, experience record under the required service conditions. SPEC WRITER NOTE: Delete Subparagraph if not applicable. /6. Continuous blowoff heat exchanger tube bundles: Dimensions, design, construction, heating surface, perf

16、ormance data. / D. Blowoff Tank and Accessories, Flash Tank: 1. Drawing showing outline dimensions, arrangement and weight of tank and accessories. Locations and sizes of all pipe connections and access openings. 2. Design and construction of tank, supports and accessories. 3. Design and performance

17、 of blowoff tank temperature control valve. E. Boiler Feed and Condensate Transfer Pumps: 1. Drawings with dimensions of assemblies of pumps and drivers. 2. Catalog data and specification sheets on design and construction of pumps, drivers and couplings (flexible-coupled units). 3. Motor efficiency

18、and power factor at full load. 4. Performance curves showing discharge head, required flow plus recirculation, NPSH required, efficiency, driver power, impeller diameter to be furnished. Refer to drawings for requirements. 5. Pressure and temperature limitations of pump unit and accessories. 6. Size

19、 and capacity of recirculation orifice. 7. Data on variable frequency drive units and pressure controllers (if VFD specified). F. Condensate Return Pumps (Electrical and/or Mechanical Types) and Vacuum Heating Pump Units: 1. Drawings with dimensions of entire unit. Drawing shall include locations an

20、d sizes of all pipe connections. 2. Catalog data and specification sheets on design and construction of pumps, receiver and accessories. 3. Catalog cuts and schematic diagram of controls. 4. Electric pump performance curves showing discharge head, flow, NPSH required, efficiency, motor power and imp

21、eller diameter to be furnished. Mechanical pump performance showing discharge head, flow, required inlet head and steam pressure. Refer to drawings for requirements. 5. Pressure and temperature limitations of pump unit. G. Fuel Oil Pumping Equipment: 1. Drawings with overall dimensions and arrangeme

22、nt of pumps, motors, couplings, bases, drip pans, duplex strainer, relief valves, back-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-05-11 23 50 11 - 4 pressure control valve, entire fuel oil heating system (if provided) and supports and all access

23、ories. 2. Catalog data and specification sheets on the design and construction of pumps, motors, couplings, bases, drip pans, duplex strainer, relief valves, back pressure control valves, all valves and accessories. 3. Motor efficiency and power factor at full load. 4. Pressure and temperature limit

24、ations of pumps, duplex strainer, relief valves, back pressure control valve and all valves. 5. ASTM number and pressure rating of pipe and fittings. 6. Performance data on pumps including discharge head, flow, suction lift and motor power required at viscosity range shown. Refer to drawings for req

25、uirements. 7. Sound level test data on similar pump in similar installation. Refer to Section 23 05 51, NOISE AND VIBRATION CONTROL FOR BOILER PLANT. 8. Performance data on relief valves and back-pressure control valves. H. Fuel Oil Heaters and Accessories: 1. Drawings with dimensions and arrangemen

26、t of heaters, temperature control valves, relief valves, supports and all accessories. Show locations and sizes of all piping connections. 2. Clearances required for tube removal. 3. Catalog data and specification sheets on the design and construction of heaters, temperature control valves, relief v

27、alves, electric controls and all accessories. 4. Pressure and temperature limitations of heaters, temperature control valves and relief valves. 5. Steam trap capacity requirements and selection. 6. Material (ASTM No.) and pressure rating of pipe and fittings. 7. Performance data of heaters including

28、 oil flow, pressure loss, temperature rise, amount of steam or electricity required. 8. Performance data on relief valves and temperature control valves. I. No. 2 Fuel Oil Temperature Control System: 1. Drawing with dimensions and arrangement of pumps, motors, heaters, relief valves and accessories.

29、 2. Catalog data and specification sheets on the design and construction of pumps, motors, heaters and controls. 3. Pressure and temperature limitations of pumps, heaters, valves, fittings, strainers and relief valves. 4. Material (ASTM No.) and pressure rating of pipe and fittings. Provided by IHSN

30、ot for ResaleNo reproduction or networking permitted without license from IHS-,-,-05-11 23 50 11 - 5 5. Performance data on oil pumps including discharge head, flow, suction lift and motor power required at viscosity range shown. Refer to drawings for requirements. 6. Performance data on relief valv

31、es. J. Compressed Air System: 1. Drawing with dimensions and arrangement of air compressor, motor, air dryer, receiver and all accessories. 2. Catalog data and specification sheets on the design and construction of air receiver, compressor, after-cooler, motor, air dryer, all accessories, condensate

32、 traps. Solenoid valves and filters. 3. Performance data on compressors, after coolers, air dryer, relief valves. K. Steam Vent Silencer (Muffler): 1. Drawings with silencer dimensions and weights, and sizes and types of pipe connections. 2. Catalog data and specification sheets on the design and co

33、nstruction. 3. Sound attenuation data at required flow rates. L. Boiler Water and Deaerator Water Sample Coolers: 1. Drawings with dimensions, and sizes and location of piping connections. 2. Catalog data and specification sheets on the design and construction. 3. Pressure and temperature limitation

34、s. 4. Amount of heat exchange surface. M. Chemical Feed Systems (Pump Type): 1. Drawings with dimensions of entire unit. Include locations and sizes of all pipe connections. 2. Catalog data and specification sheets on the design and construction of pump, mixer, tank, controls. 3. Performance data on

35、 pump including head, flow, motor power. Refer to schedules on drawings for requirements. 4. Pressure and temperature limitations of unit and accessories. 5. Information on suitability of materials of construction for chemicals to be utilized. N. Automatic Continuous Blowdown Control System: 1. Draw

36、ings with arrangement and dimensions of entire unit. Include locations and sizes of all pipe connections. 2. Catalog data and specification sheets on design and construction of conductivity sensor, control valves, controller. 3. Performance data on control valves. 4. Pressure and temperature limitat

37、ions of valves and conductivity sensor. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-05-11 23 50 11 - 6 O. Test Data Acceptance Tests, On-Site: Four copies all specified tests. SPEC WRITER NOTE: Delete the following subparagraph if not applicable.

38、 P. Completed System Readiness Checklists provided by the Commissioning Agent and completed by the contractor, signed by a qualified technician and dated on the date of completion in accordance with the requirements of Section 23 08 00 COMMISSIONING OF HVAC SYSTEMS. /Q. Seismic Restraint Data: Refer

39、 to Section 13 05 41, SEISMIC RESTRAINT REQUIREMENTS FOR NON-STRUCTURAL COMPONENTS. / 1.4 APPLICABLE PUBLICATIONS A. The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the text by the basic designation only. B. American Societ

40、y for Testing and Materials (ASTM): A53/A53M-07 Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless A106/A106M-08 Standard Specification for Seamless Carbon Steel Pipe for High Temperature Service A234/A234M-10 Standard Specification for Piping Fittings of

41、Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service A285/A285M-03(2007) Standard Specification for Pressure Vessel Plates, Carbon Steel, Low- and Intermediate Tensile Strength A414/A414M-10 Standard Specification for Steel, Sheet, Carbon, and High-Strength, Low-Alloy for P

42、ressure Vessels A515/A515M-03(2007) Standard Specification for Pressure Vessel Plates, Carbon Steel, for Intermediate- and Higher-temperature Service A516/A516M-06 Standard Specification for Pressure Vessel Plates, Carbon Steel, for Moderate-and Lower-Temperature Service C. American Society of Mecha

43、nical Engineers (ASME): Boiler and Pressure Vessel Code: 2007 Edition with Amendments. Section VIII . Pressure Vessels, Division I and II. Performance Test Code: PTC 12.3-1997 Performance Test Code for Deaerators B16.9-2007 . Factory-Made Wrought Butt Welding Fittings B16.34-2009 Valves, Flanged, Th

44、readed and Welding End Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-05-11 23 50 11 - 7 D. National Board of Boiler and Pressure Vessel Inspectors: NB-23-2007 . Inspection Code E. American Society of Heating, Refrigeration and Air-Conditioning Engi

45、neers (ASHRAE): ASHRAE Handbook 2008 HVAC Systems and Equipment F. Society for Protective Coatings (SSPC): SP 5-2007 White Metal Blast Cleaning G. Underwriters Laboratories (UL): 574-03 . Standard for Electric Oil Heaters PART 2 - PRODUCTS 2.1 FEEDWATER DEAERATOR WITH STORAGE TANK AND ACCESSORIES SP

46、EC WRITER NOTES: 1. Select tray and packed column-type deaeration except where available headroom is insufficient to accommodate their height. These types provide good performance over a wide load range. 2. Spray-types that utilize recycle pumps to provide a constant flow rate through the spray nozz

47、les also provide good performance over a wide load range. However, the operating cost of the recycle pump is a disadvantage. A. Pressurized (14-35 kPa) (2-5 psi) unit designed to heat and deaerate boiler feedwater by direct contact with low pressure steam. /Tray or packed column / Spray / type deaer

48、ating section. Horizontal feedwater storage tank. Provide recycle spray water pumps on spray-type units if necessary to obtain required performance. Provide accessories including vacuum breaker, safety valve, water inlet and overflow controls and control valves, water level indicators and alarms and

49、 other devices as specified and shown. B. Performance and Operating Characteristics: 1. Oxygen Content of Feedwater Output: 7 parts per billion maximum over turndown range with minimum and normal feedwater input temperatures as listed. 2. Turndown: 20/1. 3. Required Maximum Feedwater Flow Output: _kg/sec (_lb/hr). 4. No carbon dioxide in feedwater output; maximum steam vent loss 1/2 per