1、MIL-1-24783 0b 1852403 317 IINCH-POUND) MIL-I-24783(SH) 15 April 1993 MILITARY SPECIFICATION ISOLATOR, RING TYPE, PRESSURE, FOR SHIPBOARD SEWAGE SERVICE This specification is approved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by all Departments and Ag
2、encies of the Department of Defense. 1. SCOPE 1.1 ScoDe. This specification covers the requirements for ring and flanged spool type isolators, installed between pipe flanges, to isolate pressure and vacuum gauges from clogging by sediment and solids in shipboard sewage systems. 1.2 Classification. I
3、solators are of the following types and sizes as specified (see 6.2). Type A - Ring, in sizes 1-inch nominal pipe size (nps), and larger. Type B - Flanged spool, in sizes 1/2-inch to 4-inch nps. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 SDecfications. standards. and handbooks. The foll
4、owing specifi- cations, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, ci
5、ted in the solicitation (see 6.2). Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 05442, 2531 Jefferson Davis Hwy, Arlington, VA 22242-5160 by using th
6、e self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 4730 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted w
7、ithout license from IHS-,-,-MIL-1-24783 9999906 L852404 253 MIL-I-24783(SH) I- SPECIFICATIONS FEDERAL QQ- C - 390 - Copper Alloy Castings (Including Cast Bar). QQ-N-281 - Nickel-Copper Alloy Bar, Rod, Plate, Sheet, Strip, Wire, Forgings, and Structural and Special Shaped Sections. QQ-N-286 - Nickel-
8、Copper-Aluminum Alloy, Wrought (UNS N05500). MIL-C-15726 MS 16 14 2 MIL-P-16789 MS 182 29 MIL-G-18997 MIL-F-20042 MIL-A-46153 MIL-R-83248 STANDARD MILITARY MIL-S-901 - Shock Tests, H.I. (High-Impact), Shipboard Machin- MIL-G-1149 - Gasket Materials, Synthetic Rubber, 50 and 60 Duro- MIL-S-1222 - Stu
9、ds, Bolts, Hex Cap Screws, Socket Head Cap MIL-P-15024 - Plates, Tags and Bands for Identification of MIL-P-15024/5 - Plates, Identification. ery, Equipment, and Systems, Requirements for. meter Hardness. Screws and Nuts. Equipment. - Copper-Nickel Alloy, Sheet, Plate, Strip, Bar, Rod - Boss, Gasket
10、 Seal Straight Thread Tube Fitting, - Pumps (Including Prime Movers and Support Items); - Plug for “O“ Ring Gasket. - Gauge, Pressure, Dial Indicating. - Flanges, Pipe and Bulkhead, Bronze (Silver - Antifreeze, Ethylene Glycol, Inhibited, Heavy Duty, - Rubber Fluorocarbon Elastomer, High Temperature
11、, and Wire. Standard Dimensions for. Packaging of. Brazing). Single Package. Fluid, and Compression Set Resistant. MI LI TARY MIL-STD- 129 MIL-STD-167 - Marking for Shipment and Storage. 1 - Mechanical Vibrations of Shipboard Equipment (Type I - Environmental and Type II - Internally Excited). - Wel
12、ding and Casting Standard. MIL-STD-45662 - Calibration Systems Requirements. MIL-STD-278 (Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, BLDG. 4D, 700 Robbins Avenue, Philadelphia, PA 19
13、111-5094.) 2.1.2 Other Government documents. drawings, - and Dublications. The following other Government documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation. 2 Provided by IHSNo
14、t for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL- 1-2 47 8 3 m 0b 1852405 LT m MIL-I-24783(SH) PUBLICATIONS NAVAL SEA SYSTEMS COMMAND (NAVSEA) 0900-LP-001-7000 - Fabrication and Inspection of Brazed Piping Sys terns. (Application for copies should be addressed to
15、the Standardization Documents Order Desk, BLDG. 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) 2.2 Non-Government Dublications. The following document(s) form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DOD adopted
16、are those listed in the issue of the DODISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DODISS are the issues of the documents cited in the solicitation (see 6.2). AMERICAN NATIONAL STANDARDS INSTITUTE INC. (ANSI) B40.1 - Gauges - Pressure Indicat
17、ing Dial Type - Elastic B46.1 - Surface Texture (Surface Roughness, Waviness, and Element. (DoD adopted) Lay) (Application for copies should be addressed to the American National Standards Institute, 11 West 42nd Street, 13th Floor, New York, NY 10036.) AMERICAN SOCIETY FOR TESTING AND MATERIALS (AS
18、TM) (DoD adopted). General Applications. (DoD adopted) Screws, and Studs for General Use. (DoD adopted) B 61 B 584 - Standard Specification for Copper Alloy Sand Castings for F 467 - Standard Specification for Nonferrous Nuts for General Use. F 468 - Standard Specification for Nonferrous Bolts, Hex
19、Cap - Standard Specification for Steam or Valve Bronze Castings. (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103). (Non-Government standards and other publications are normally available from the organizations th
20、at prepare or distribute the documents. These documents also may be available in or through libraries or other informational services.) 2.3 Order of Drecedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. N
21、othing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-1-24783 rn 9999906 1852406 02b = e- O 3. REQUIREMENTS 3.1 First article.
22、 When specified (see 6.2), a sample shall be subjected to first article inspection (see 6.4) in accordance with 4.5. 3.2 Material, The material for the pressure gauge isolator shall be as specified herein. selected shall be the best commercial marine grade for the purpose intended. Acceptance or app
23、roval of any constituent material shall not be construed as a guaranty of the acceptance of the finished product. When a definite material is not specified, the material 3.2.1 Welding and brazing. Welding shall be in accordance with MIL-STD-278. Silver-brazing shall be in accordance with NAVSEA 0900
24、-LP-001-7000. 3.2.2 Castines. Castings shall not be plugged, brazed, or impregnated or otherwise repaired (see 6.6). 3.2.3 Mercury Drohibition. Components and parts furnished by the contractor During the shall be free of mercury contamination and free of functional mercury. manufacturing processes,
25、checks, examinations, and tests, the product being offered for acceptance shall not come in direct contact with mercury, any of its compounds, or with any mercury containing device, such as gauges and thermometers. The product, when shipped, shall be free from mercury contamination (see 6.3). 3.2.4
26、Recovered materials. Unless otherwise specified herein, all equip- ment, material, and articles incorporated in the products covered by this specification shall be new and may be fabricated using materials produced from recovered materials to the maximum extent practicable without jeopardizing the i
27、ntended use. The term “recovered materials“ means materials which have been collected or recovered from solid waste and reprocessed 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 products is allo
28、wed under this specification unless otherwise specifically specified. O 3.3 Construction. The ring type isolator (type A) and flanged spool isolator (type B) shall be of the design and construction as specified in 3.3.1 through 3.3.12 (see 6.3). 3.3.1 General reauirements. Isolators with attached ga
29、uges will be installed between pipe flanges to monitor the pressure or vacuum in the pipe. The isolators shall function in vertical or horizontal pipe runs. The isolator shall be provided with an internal cylindrical flexible elastomeric element isolating the fluid in the pipe from the sensing fluid
30、 to the gauge. The isolator shall not cause any obstruction to fluid internal passage through the pipe. Means shall be provided to isolate the gauge or remove the gauge for repair without interrupting the flow through the pipe and without loss of the sensing fluid from the isolator assembly. 3.3.2 I
31、solator and gauge set. Where an isolator and gauge set is specified, isolators shall be furnished complete with mounted gauges, charged with sensing fluid, and calibrated (see 6.2). 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-1.24783 m 9997
32、7Ob I1852407 Tb2 m 3.3.3 Isolator. The isolator assembly shall include a cylindrical flexible elastomeric element internally mounted in the isolator body, a gauge cutout valve, extensions, and adapters for gauge mounting, and other parts, as required by the design. flanges in accordance with MIL-F-2
33、0042, of the size specified (see 1.2). System fluid flow passage through the isolator shall equal the nominal size of the isolator with a tolerance of plus 0.062 inches minus zero inches. There shall be no dead ends or crevices in the isolator flow passage to trap and cause sediment buildup. transit
34、ion from the isolator bore to the piping system mounting flange. body material shall be tin bronze alloys C90300 or C92200 in accordance with ASTM B 61 or ASTM B 584, or QQ-C-390. Plates and shapes shall be copper alloys to QQ-N-281, or MIL-C-15726, or nickel-copper-aluminum alloy to QQ-N-286. Side
35、faces shall be flat and machine finished as specified below (see 3.3.3.1). The isolator shall be constructed so that the elastomeric element is not compressed during installation in the piping system when pipe flanges are .tightened about the isolator. The isolator assembly shall be suitable for mou
36、nting between bronze O The inlet and outlet ways shall be chamfered to provide a smooth Isoiator 3.3.3.1 RinF isolator (type A). The isolator overall thickness shall be 2.000 0.015 inches and the nominal outside diameter shall be equal to the MIL-F- 20042 flange diameter. Where required by the contr
37、actors standard construction, lugs or bosses may project outside the nominal diameter. The isolator body shall be drilled for through bolting in accordance with MIL-F-20042, class 150. 3.3.3.2 Flanaed - sool isolator (tvpe BI. Flange thickness, outside diameter and drilling for bolting shall be in a
38、ccordance with MIL-F-20042, class 150. Isolator flange face to face dimension shall be 5.375 however, this does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to accept defective material. 4.2 Classification of insDections. The ins
39、pection requirements specified herein are classified as follows: (a) First article inspection (see 4.5). (b) Quality conformance inspection (see 4.6) 4.3 InsDection conditions. Unless otherwise specified herein, inspections shall be performed in accordance with the test conditions specified herein a
40、nd 4.7. 4.3.1 Environmental conditions. Unless otherwise specified herein, inspec- tions andtests required by this specification shall be conducted at prevailing atmospheric pressure, ambient temperature of 65 to 85“F, and relative humidity of 30 to 80 percent. 4.3.2 Test fluid. Unless otherwise spe
41、cified herein, all tests shall be conducted using clean fresh water. 4.3.3 Test standards. Test standards shall be as specified in 4.3.3.1 and 4.3.3.2. 4.3.3.1 Test gauge. - A test gauge, in accordance with ANSI B40.1, shall be used to check the accuracy of the isolator and gauge assembly. the test
42、gauge shall be within plus or minus 1/4 percent of span. shall be maintained in accordance with MIL-STD-45662. The accuracy of The test gauge 4.3.3.2 Other standards. Upon prior approval, another type of pressure standard may be used (see 6.6). than four times more accurate than the isolator and gau
43、ge assembly being tested or shall operate in the local environment within one-fourth tolerance specified for the isolator and gauge assembly being tested. The approved pressure standard shall be maintained in accordance with MIL-STD-45662. The approved pressure standard shall be not less 4.3.4 Gauge
44、 for test DurDoses. Where a first article test sample is an isolator without gauge, first article tests shall be conducted using a 2-1/2 inch-dial size pressure gauge, dial range O to 200 lb/in2, or 30 inches hg - 200 lb/in2, as applicable. The sample isolator with gauge installed shall be considere
45、d as an isolator and gauge set in the test requirements herein. 4.4 Reiection criteria. One or more failures of any test or one or more defects found in any examination shall be cause for rejection of the entire lot represented by the sample. action be implemented by the contractor. Rejection of a l
46、ot shall require that corrective 4.5 First article inspection. When required (see 3.1), first article inspection shall consist of the examinations and tests specified in table I. 4.5.1 First article inspection samDles. Unless otherwise specified (see 6.2), one sample of each type and size of isolato
47、r or one sample of each type, size, and pressure range of an isolator and gauge set shall be subjected to first article inspection specified in 4.5. The first article may be a standard product- 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-1-
48、24783 m 999990b 1852412 32T m MIL-I-24783(SH) Inspection Requirement ” Test ion item from the contractors current inventory, provided the samF-5 meets the requirements of this specification and is representative of the design, construc- tion, materials, and manufacturing technique applicable to the
49、remaining isolators and isolator and gauge sets to be furnished under the contract. 4.5.2 Order of tests. Examination and tests listed in table I shall be performed in the order listed (see 6.6). TABLE I. First article inspection. Inspection Visual and dimensional examination Structural soundness L/ Accuracy Repeat ab il i ty High temperature Installation tightening Vibration Shock Pressure cycling Inspection of packaging Visual and dimensional 3.2, 3.3, 3.5, 3.5.1, examinat
