1、 INCH-POUNDMIL-PRF-32187 24 February 2005 PERFORMANCE SPECIFICATION GASKET, HYBRID, FLAT AND RAISED FACE FLANGE, FIRE RESISTANT, SHIPBOARD USE This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This performance specification cover
2、s hybrid gaskets designed for sealing ASME B16.5, Class 150, flat and raised face flanges in fuel and lube oil piping systems. Hybrid gaskets are fire resistant and are intended for shipboard use. Hybrid gaskets are defined as gaskets fabricated using two or more materials usually an elastomeric com
3、pound serving as the primary seal and an enveloping graphite material serving as the fire resistant seal. 1.2 Classification. 1.2.1 Types. Hybrid gaskets are classified by the following types, as specified: Type I - Two circular, concentric seals recessed into the surface of a metal ring; an inner e
4、lastomeric seal (primary seal) and an outer flat graphite sheet material seal (fire resistant seal). Type II - Two circular, concentric seals recessed into the surface of a metal ring; an inner elastomeric seal (primary seal) and an outer spiral wound graphite seal (for fire resistant seal). Type II
5、I - Multiple circular, concentric seals of sheet graphite material, recessed into the surface of a self-locating metal ring. 1.2.2 Sizes. Hybrid gasket sizes accommodate piping flanges with the following nominal pipe sizes (NPS) (in inches): , , , 1, 1, 1, 2, 2, 3, 3, 4, 5, 6, 8, 10, and 12. Comment
6、s, suggestions, or questions on this document should be addressed to: Commander, Naval Sea Systems Command, ATTN: SEA 05Q, 1333 Isaac Hull Avenue, SE, Stop 5160, Washington Navy Yard DC 20376-5160 or emailed to commandstandardsnavsea.navy.mil, with the subject line “Document Comment”. Since contact
7、information can change, you may want to verify the currency of this address information using the ASSIST Online database at http:/assist.daps.dla.mil. AMSC N/A FSC 5330 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32187 1.3 Part or identif
8、ying number (PIN). PINs to be used for hybrid gaskets acquired to this specification are created as follows: M 32187 - X X Prefix for Military Specification Specification number Type (see code below) Size (see code below) Type PIN Code Size (Inches) PIN Code Size (Inches) PIN Code Size (Inches) PIN
9、Code Size (Inches) PIN Code I 1 A 1 E 3 J 6 N II 2 B 1 F 3 K 8 P III 3 C 2 G 4 L 10 Q 1 D 2 H 5 M 12 R 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section does not include documents cited in other sections
10、 of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this specification, whet
11、her or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the s
12、olicitation or contract. DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-DTL-1222 - Studs, Bolts, Screws and Nuts for Application Where a High Degree of Reliability is Required; General Specification for (Copies of these documents are available online at http:/assist.daps.dla.mil/quicksearch/ or http:/assi
13、st.daps.dla.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.2.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and publications form a part of this document to the exten
14、t specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. BUREAU OF MEDICINE BUMED 6270.8 - Procedures for Obtaining Health Hazard Assessments Pertaining to Operational Use of a Hazardous Material (Copies of this document are avail
15、able from Bureau of Medicine and Surgery, Department of the Navy, 2300 E Street, NW, Washington, DC 20372-5300 or online at http:/navymedicine.med.navy.mil.) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32187 2.3 Non-Government publicati
16、ons. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. AMERICAN PETROLEUM INSTITUTE (API) API-STD-607 - Valve, Fire Test for Soft-Seated Quarter Turn (DoD ado
17、pted) (Copies of this document are available from American Petroleum Institute, 1220 L Street NW, Washington, DC 20005-4070 or online at www.api.org.) ASME INTERNATIONAL ASME B16.5 - Pipe Flanges and Flanged Fittings: NPS through 24 (DoD adopted) (Copies of this document are available from the ASME
18、International, 22 Law Drive, P.O. Box 2900, Fairfield, NJ 07007-2900, or online at www.asme.org.) ASTM INTERNATIONAL ASTM A106/A106M - Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service (DoD adopted) ASTM D512 - Standard Test Methods for Chloride Ion in Water (DoD ado
19、pted) ASTM D1179 - Standard Test Methods for Fluoride Ion in Water (DoD adopted) ASTM D1246 - Standard Test Method for Bromide Ion in Water (DoD adopted) ASTM D3223 - Standard Test Method for Total Mercury in Water (DoD adopted) ASTM D3557 - Standard Test Methods for Cadmium in Water ASTM D3559 - St
20、andard Test Methods for Lead in Water (DoD adopted) ASTM D4190 - Standard Test Method for Elements in Water by Direct-Current Argon Plasma Atomic Emission Spectroscopy ASTM D4327 - Standard Test Method for Anions in Water by Chemically Suppressed Ion Chromatography (Copies of these documents are ava
21、ilable from ASTM International, 100 Barr Harbor Dr., West Conshohocken, PA 19428, or online at www.astm.org.) INTERNATIONAL ORGANIZATION FOR STANDARDIZATION (ISO) ISO/IEC 17025 - General Requirements for the Competence of Testing and Calibration Laboratories (Copies of this document are available fr
22、om ISO, 1, rue de Varemb, CH-1211 Geneva 20, Switzerland or online at www.iso.org.) 2.4 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applica
23、ble laws and regulations unless a specification exemption has been obtained. 3. REQUIREMENTS 3.1 Qualification. Hybrid Gaskets furnished under this specification shall be products that are authorized by the qualifying activity for listing on the applicable qualified products list before contract awa
24、rd (see 4.2 and 6.3). Hybrid gaskets for both flat and raised face flanges shall be qualified. 3.2 Materials. Materials shall exhibit fluid compatibility satisfactory for long-term exposure to hydrocarbons such as fuel oils and lube oils. Materials shall not break down or break apart contributing pa
25、rticles into system fluids. Materials shall exhibit galvanic compatibility when installed in contact or close physical proximity to carbon steel, corrosion resisting steel, bronze, or copper-nickel alloys. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IH
26、S-,-,-MIL-PRF-32187 3.2.1 Detrimental materials. Detrimental materials shall not exceed the maximum concentrations as specified in Table I (see 4.5.1.3). TABLE I. Detrimental materials. Material Maximum concentration permitted (ppm) Asbestos None permittedHalogens (total of chloride, fluoride and br
27、omide) 1/ 1,000 Lead 250 Cadmium plating None permitted Mercury and compounds (none intentionally added) 2/ 10 Sulfur 10,0001/ Materials containing more than 1,000 parts per million (ppm) total halogens are acceptable provided only fluorine exceeds 250 ppm and total leachable halides do not exceed 2
28、50 ppm. 2/ During manufacture, fabrication, handling, packaging, and packing, hybrid gasket materials shall not come in contact with mercury or mercury compounds. 3.2.2 Toxins, carcinogens, and reproductive hazards. The material shall have no adverse effect on the health of personnel when used for i
29、ts intended purpose. The material shall be assessed by the Navy Environmental Health Center (NEHC) using the administrative Health Hazard Assessment (HHA). A flowchart for this process can be found as enclosure (1) of BUMEDINST 6270.8. The HHA is a review of the material based on information submitt
30、ed by the manufacturer, to assess health hazards associated with the handling, application, use and removal of the product. The material shall not cause any environmental problems during waste disposal. 3.2.3 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or envir
31、onmentally preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.3 Design and construction. Hybrid gasket design and construction may var
32、y from types listed in 1.2.1 provided that the requirements of this document are met. Unless otherwise specified (see 6.2), hybrid gasket sizes shall conform to ASME B16.5, Class 150 flanges with nominal pipe sizes listed in 1.2.2. 3.3.1 Service life. Hybrid gaskets shall be designed for a minimum s
33、ervice life of 15 years. 3.4 Physical requirements. 3.4.1 Fire resistance. Hybrid gaskets shall be fire resistant to withstand a 30-minute exposure to a modified API-STD-607 fire test (see 4.2). 3.4.2 Structural characteristics. Hybrid gaskets shall maintain system integrity when installed in flange
34、s exhibiting customary bolt torques, flange face finishes, and allowable degrees of misalignment. When installed, hybrid gasket compression shall not damage the surface finish of the mating flange faces. 3.4.2.1 Gasket thickness. Hybrid gaskets shall have a maximum initial uncompressed thickness of
35、0.18 inch. Gasket thickness shall not exceed 0.135 inch under the compressive load associated with ASME B16.5 flange configuration and torque values applied to the size and number of corresponding bolting. 3.4.3 Sealing characteristics. Hybrid gaskets shall show no visible leakage during normal syst
36、em operation. 3.5 Performance requirements. 3.5.1 Operating environment. Hybrid gaskets shall prevent flange leakage in shipboard fuel and lube oil systems (excluding hydraulic systems) with operating temperatures of -20 to 250 F. Hybrid gasket sealing integrity shall not be affected by thermal cycl
37、ing (see 4.2). 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32187 3.6 Cleanliness requirements. Surface of gaskets and related parts shall be commercially clean, for example, free of dirt, oils, grease, chips, and foreign matter. 4. VERI
38、FICATION 4.1 Classification of inspections. The inspection requirements specified herein are classified as follows: a. Qualification inspection (see 4.2). b. Conformance inspection (see 4.3). TABLE II. Examinations and inspections. Test requirement Requirement paragraph Verification paragraph Qualif
39、ication Conformance Examination 3.2 through 3.6 4.4 X X Fire test 3.1 and 3.4.1 4.5.1.1 X Pressure and temperature exposure test 3.1 and 3.5.1 4.5.1.2 X Detrimental materials 3.1 and 3.2.1 4.5.1.3 X 4.2 Qualification inspection. Qualification inspection shall be performed on hybrid gaskets and their
40、 materials as specified herein. This inspection shall include the examination of 4.4 and the tests of 4.5.1 through 4.5.1.3.2. 4.3 Conformance inspection. Conformance inspection shall include the examination of 4.4. 4.4 Examination. Each hybrid gasket shall be examined for compliance with the requir
41、ements specified in 3.2 through 3.6. Any redesign or modification of the contractors standard product to comply with specified requirements, or any necessary redesign or modification following failure to meet the specified requirements shall receive particular attention for adequacy and suitability.
42、 This element of inspection shall encompass all visual examinations and dimensional measurements. Noncompliance with any specified requirements or presence of one or more defects preventing or lessening maximum performance shall constitute cause for rejection. 4.5 Methods of inspection. 4.5.1 Produc
43、t certification. Hybrid gaskets of each size (1-inch, 4-inch, and 12-inch) shall be tested in both flat faced flanges and raised face flanges of the corresponding sizes. Gasket material samples shall be tested as applicable to 4.5.1.3. 4.5.1.1 Fire test. The hybrid gasket shall be tested in accordan
44、ce with and shall meet the maximum allowable external leakage rate acceptance criteria of API-STD-607, as modified below. The test encompasses pressurizing the specimen with water, and exposing it to a hydrocarbon temperature curve as specified in the standard. During the test, leakage rate is measu
45、red by monitoring source tank levels. Testing of each size hybrid gasket shall be conducted using flat and raised face flanges and shall meet the following criteria and the requirements specified herein. The fire test shall be conducted at a laboratory acceptable to the U S Navy. The laboratory shal
46、l comply with ISO/IEC 17025. The laboratory shall also demonstrate the ability to conduct testing in accordance with API-STD-607 by past successful testing or by demonstration of capabilities to the satisfaction of the U.S. Navy. Accreditation by a nationally recognized organization is needed to ass
47、ure the U.S. Navy that the laboratory selected by the vendor is competent to conduct the testing and that they maintain an acceptable quality assurance program. An ABS surveyor or Naval Technical Authority shall certify the test laboratory. Figure 1 illustrates a typical fire test setup. Any varianc
48、e in setup or test procedures requires NAVSEA approval prior to testing. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32187 F Furnace G Gasket/Pipe/Flange Specimen S Sight Gauge W Water Source Tank T Furnace Top E Furnace Extension Block
49、 P Pressure Gauge with Steam Trap ST Steam Trap - Valve FIGURE 1. Typical modified API-STD-607 fire test setup for hybrid gasket. 4.5.1.1.1 Testing criteria. This 30-minute fire exposure test is intended to demonstrate that the gaskets will not fail catastrophically or contribute a significant amount of combustible liquid to a fire. 4.5.1.1.2 Test sample. Six gaskets, two 1-inch, two 4-inch and two 12-inch NPS, shall be tested, one sample of e
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