NAVY MIL-P-23857 B-1982 PUMPING ASSEMBLIES ASPHALT BULK TRANSFER《散装转让沥青泵组件》.pdf

1、-_ MIL-P-23857B 43 W 99979Oh 0274287 h -Y, MIL-P-23857B(YD) 8 November 1982 SUPERSEDING MIL-P-23857A (DOCKS) 28 July 1964 MILITARY SPECIFICATIOI PUMPING ASSEMBLIES, ASPHALT, BULK TRANSFER This specification is approved for use by the Naval Facilities Engineering Command, Department of the Navy, and

2、is available for use by all-Departments and Agencies of 1. SCOPE. 1.1 Scope. This specification covers two designed for bulk transfer of heated asphalt the- Department of Defense. sizes of pumping assemblies n a mobile, continuous-mix asphalt plant. displacement, rotary pump; an electric motor with

3、magnetic starter and push- button station; a jacketed strainer; drive mechanism; and other components and accessories specified herein. The assemblies shall be mounted on a steel skid- base to form an integrated, portable, asphalt pumping unit. The pumping assemblies consist of a jacketed, positive-

4、 1.2 Classification. Pumping assemblies shall be of the following sizes, as specified (see 6.2.1). Size 1 - 90 gallons per minute (gpm). Size 2 - 200 gpm. 2. APPLICABLE DOCUMENTS 2.1 Gvernment documents. 2.1.1 Specifications and standards. Unless otherwise specified (see 6.2.1), the following specif

5、ications and standards of the issue listed in that issue of the Department of Defense Index of Specifications and Standards (DODISS) speci- fied in the solicitation form a part of this specification to the extent specified herein. Beneficial comments (recommendations, additions, deletions) and any p

6、ertinent! Idata which may be of use in improving this document should be addressed to: I ICommanding Officer (Code 156), Naval Construction Battalion Center, Port Hueneme, CA 93043, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this

7、document or I Iby letter. I I I. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL - P - 2 3 8 5 7 B (Y D ) SPECIFICATIONS FEDERAL IT-P-664 - Primer Coating, Synthetic, Rust-Inhibiting, Lacquer- PPP-B-601 - Boxes, Wood, Cleated-Plywood. PPP-B-621 -

8、 Boxes, Wood, Nailed and Lock-Corner. PPP-B-636 - Boxes, Shipping, Fiberboard. Resisting. MILITARY MIL-P-116 - MIL-V-173 - MIL-C-3774 - MIL-E-16298 - MIL-U-18182 - MIL-B-26195 - MIL-P-46093 - MIL-(2-52950 - Preservation, Methods of. Varnish, Moisture and Fungus Resistant (for Treatment of Communicat

9、ions, Electronic, and Associated Equipment). Crates, Wood, Open, 12,000- and 16,000- Pound Capacity. Electric Machines Having Rotating Parts and Associated Repair Parts, Packaging of. Union, Pipe, Forged Steel, Threaded, Water-Oil-Gas (2,000, 3,000 and 6,000 lb/in2). Boxes, Wood-cleated, Skidded, Lo

10、ad-Bearing Base. Primer Coating, Synthetic (For Brake Drums). Crates, Wood, Open and Covered. STANDARD MILITARY MIL-STD-129 - Marking for Shipment and Storage. 2.2 Other publications. The following documents form a part of this speci- The issues of the documents which are fication to the extent spec

11、ified herein. indicated as DOD adopted shall be the issue listed in the current DODISS and the supplement thereto, if applicable. MZRICAN NATIONAL STANDARDS INSTITUTE, INC. (ANSI) B2.1 - Pipe Threads (Except Dryseal). B15.1 - Safety Standard for Mechanical Power Transmission Apparatus, B16.9 - Facto

12、ry-Made Wrought Steel Buttwelding Fittings. (Application for copies should be addressed to the American National Stand- ards Institute, Inc., 1430 Broadway, New York, NY 10018.) MERICAN SOCIEIY FOR TESTING AND MATERIALS (AS“) A278 - Gray Iron Castings for Pressure-Containing Parts for Tempera- tures

13、 Up to 650F (345C), Specification for. (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19102.) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-HYDRAULIC INSTITUTE (HI

14、) Standards of Hydraulic Institute (Application for copies should be addressed to the Hydraulic Institute, 14600 Detroit Ave., Suite 712, North Cleveland, OH 44107.) NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA) ICs - 1 - General Standards for Industrlal Controls and Systems. MG - 1 - Motors

15、and Generators. (Application for copies should be addressed to the National klectrical Man- ufacturers Association, 2101 L Street, N.W., Washington, DC 20037.) NATIONAL FIRE PROTECTION ASSOCIATION (NFPA) No. 70 - National Electrical Code. (Application for copies should be addressed to the National F

16、ire Protection Association, Batterymarch Park, Quincy, MA 02269.) SOCIETY OF AUTOMOTIVE ENGINEERS, INC. (SAE) SAE Handbook. (Application.for copies should be addressed to the Society of Automotive Engineers, Inc., 400 Commonwealth Drive, Warrendale, PA 15096). (Industry association specifications an

17、d standards are generally available for reference from libraries. They are also distributed among technical groups and using Federal agencies.) 2.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this specification s

18、hall take precedence. 3. REQUIREMENTS. 3.1 Pumping assembly data sheet. Unless otherwise specified (see 6.2.1), each bidder shall submit, with his bid proposal, a completed form in accord- ance with the Pumping Assembly Data Sheet shown in figure 1. Information fur- nished shall reflect the actual c

19、haracteristics of the components to be fur- nished. The characteristics shall be equal to or exceed the minimum require- ments specified herein. 3.2 First article. When specified (see 6.2.1), the contractor shall fur- nish a pumping assembly for first article inspection and approval (see 4.2.1 and 6

20、.3). 3.3 Standard commer-,ial product. The pumping assembly shall, as a minimum, be in accordance with the requirements of this specification and shall be the 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-manufacturer Is standard commercial produ

21、ct. which are not specifically prohibited by this specification but which are a part of the manufacturers standard commercial product shall be included in the pumping assembly being furnished. uct which has been sold or is being currently offered for sale on the commer- cial market through advertise

22、ments, manufacturers catalogs, or brochures, and represents the latest production model. Additional or better features A standard commercial product is a prod- 3.4 Interchangeability. All units of the same classification furnished with similar options under a specific contract shall be identical to

23、the extent necessary to insure interchangeability of component parts, assemblies, accessories, and spare parts. 3.5 Materials. Materials used shall be free from defects which would adversely affect the performance or maintainability. of individual components or of the overall assembly. same quality

24、used for the intended purpose in commercial practice. otherwise specified herein, all equipment, material, and articles incorporated in the work covered by this specification are to be new and fabricated using materials produced from recovered materials to the maximum extent possible without jeopard

25、izing the intended use. The term “recovered materials“ means materials which have been collected or recovered from solid waste and reproc- essed to become a source of raw materials, as opposed to virgin raw materials. None of the above shall be interpreted to mean that the use of used or rebuilt pro

26、ducts are allowed under this specification unless otherwise specified. Materials not specified herein shall be of the Unless 3.6 Design. The pumping assembly shall be designed for the bulk transfer of heated asphalt (750 to 1,500 Saybolt Seconds Universal (SSU) from asphalt . melters to storage tank

27、s. Pressure containing parts of the pump and strainer, including hot oil jackets, shall be designed for an allowable working pressure of not less than 100 pounds per square inch gage (psig) at a temperature of 350“ Fahrenheit (F) (see 4.4.1). Except as specified herein, the details of the design of

28、individual components, including clearances for rotating parts in the pump casing, shall be in accordance with the recommendations of the component I s manufacturer for the specified design and operating conditions. The pumping assembly shall be so designed that no permanent mechanical damage will r

29、esult should the pump be operated with the viscosity of the asphalt up to 20,000 SSU. maintenance and service in the field. The design of the assembly shall permit accessibility for 3.7 Pump. The pump shall be a heavy-duty positive displacement, rotary pump. heat from hot oil to the asphalt and pack

30、ing. equipped with a relief valve to prevent buildup of excessive pressure in the discharge line. discharge back to the suction side of the pump. (see 6.2.1), the valve shall be set to relieve at 50 psig. size (nps) of the pump suction and discharge connections shall be not less than 2.5 inches for

31、size 1 and 3 inches for size 2. shall be conspicuously and permanently marked on the pump casing. The pump casing and stuffing box shall be jacketed to permit transfer of The pump assembly shall be The relief valve shall be designed to bypass asphalt from the nless otherwise specified The nominal pi

32、pe The direction of pump rotation 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-23857B 43 7977706 0274273 8 W - 3.7.1 Capacity. The pump shall be capable of delivering heated asphalt having a viscosity of 1,000 ssu against a total discharge

33、 head of 25 psig at the rate of not less than 90 gpm for size 1 pumps and not less than 200 gpm for size 2 pumps. The pump speed at the rated capacity shall be the manufacturers recommended speed for the conditions specified herein. Pumps requiring a speed in excess of 450 revolutions per minute to

34、provide the specified capacity will not be acceptable unless approved in writing by the contracting officer:, The pump shall be of the sliding v.ane type or exter- 3.7.2 Construction. nal or internal gear type, as defined in the Standards of the Hydraulic Insti- tute. better than class 25 of ASTM A2

35、78. The shaft shall be steel, hardened and ground, in accordance with the manufacturers standard practice. The gears shall be steel, hardened and ground, or cast iron finished in accordance with the manufacturers standard practice. controlled by packing suitable for the specified design temperatures

36、 and use. The pump shall be furnished with an extended shaft which shall be supported by three bearings. Two bearings, one on each side of the casing, shall be bronze, sleeve type or antifriction type. The end of the pump shaft shall be cup- ported, adjacent to the sheave, by a self-alining, heavy-d

37、uty, pillow block bearing or by an outboard, antifriction bearing mounted integrally with an extension of the pump casing. The pillow block or outboard bearing shall be equipped with antifriction bearings designed for a rated life expectancy of not less than 2,000 hours based on the intended applica

38、tion. The casing and stuffing box jackets shall each be furnished with not less than two tappings for connection of the hot oil tubing (see 3.9.2). and the casing connection shall be not less than 0.75 inch nps. The pump casing shall be cast iron having properties equivalent to or Leakage along the

39、pump shaft shall be The stuffing box connection 3.8 Strainer. The strainer shall consist of a cast iron or steel body with ,cover, a straining mechanism, and a hot oil jacket. The nps of the strainer inlet and outlet connections shall be not less than 2.5 inches for size 1 and 3 inches for size 2. T

40、he cover shall be bolted to the body to permit removal for cleaning and replacement of the Straining mechanism. A drain shall be pro- vided An the base of the strainer for flushing and cleaning the sump. straining mechanism shall be made of wire or perforated metal and shall provide a degree of filt

41、ration equal to or better than number 3 mesh. The jacket cham- ber shall be provided with not less than two threaded openings for connection of the hot oil jumper tubing (see 3.9.2). The hot oil connection shall be not less than 0.75 inch nps. The strainer shall be of sufficient size to assure that

42、the pressure drop, when operating under the conditions and capacity speci- fied (see 3.7.1), will not exceed the difference between the pump manufactur- ers allowable suction lift and a system suction lift of 3 psig external to the strainer. The 3.9 Piping and connections, 3.9.1 Asphalt system. The

43、inlet and outlet connections of both the pump and strainer shall be flanged. pump inlet shall be complete with all necessary elbows, reducers, and coup- lings. All elbows, reducers, couplings, and flanges shall be connected by The connection between the strainer outlet and 5 Provided by IHSNot for R

44、esaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-,238578 43 747770b 027LiZIZ T welding, Dimensions of all.elbows, reducers, and couplings shall be in accord- ance with ANSI B16.9. Both the inlet connection of the strainer and the out- let connection of the pump shall b

45、e provided with an adapter consisting of a bolted flange having a threaded nipple welded to the flange. nipple shall be 4 inches by 2.5 inches for size 1 and 4 inches by 3 inches for size 2. specified operating conditions. The threaded Flanged connections shall be provided with gaskets suitable for

46、the 3.9.2 Hot oil system. Connections shall be provided to permit circulation of hot oil from an external source, through the pump jacket to the strainer jacket, through the strainer jacket to the stuffing box, and back to the exter- nal source. Jumper connections between the pump jackets and the st

47、rainer jacket shall consist of flexible metal tubing having a 1-inch nominal inside diameter. be constructed of corrugated steel with a corrosion-resistant wire-braid covering. Jumpers shall be attached to jacket connections by forged steel unions in accordance with MIL-U-18182. coated or uncoated.

48、The nps of the unions shall be 1 inch with suitable elbows, nipples, and reducers furnished, as required, for connection to the appropriate tappings in the jackets. Two additional 1-inch unions, conforming to requirements herein, shall be furnished and installed in the hot oil inlet and outlet conne

49、ctions to provide connection in the field to the hot oil sys- tem. Tubing shall be rated at not less than 200 psig at 350F and shall Each end of the jumpers shall terminate in a threaded male fitting. Unions shall be class 1 or better and may be 3.9.3 Discharge hose. One 20-foot length of flexible metal discharge hose shall be furnished with eaGh pumping assembly. of corrugated steel with a corrosion-resistant wire-braid covering. shall be capable of withstanding