1、MIL-PRF-32034 9999906 2076663 754 INCH-POUND I MIL-PRF-32034(SH) 28 October 1998 PERFORMANCE SPECIFICATION VALVE PACKING MATERIAL, NON-ASBESTOS 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 Agencies of
2、 the Department of Defense. 1. SCOPE 1.1 Scope. This specification establishes the requirements for classification of non-asbestos packing for valves handling various fluids and gases on naval ships, in the sizes and forms as specified (see 6.2). 2. APPLICABLE DOCUMENTS 2.1 General. The documents li
3、sted in this section are specified in sections 3 and 4 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, docu
4、ment users are cautioned that they must meet all specified requirements documents cited in sections 3 and 4 of this specification, whether or not they are listed. 2.2 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise sp
5、ecified, the issues of the documents which are DoD adopted 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). Beneficial comments (rec
6、ommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, SEA 034, Naval Sea Systems Command, Department of the Navy, 2531 Jefferson Davis Highway, Arlington, VA 22242-5160 by using the Standardization Document Improv
7、ement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 5330 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32034 m 9999
8、906 207bbb4 690 m MIL-PRF-32034 (SH) AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM D 129 - Standard Test Method for Sulphur in Petroleum ASTM D 512 - Standard Test Methods for Chloride Ion in ASTM D 1179 - Standard Test Methods for Fluoride Ion in ASTM D 1246 - Standard Test Method for Brom
9、ide Ion in Water. ASTM D 3850 - Standard Test Method for Rapid Thermal Products (General Bomb Method). (DoD adopted) Water. (DoD adopted) Water. (DoD adopted) ( DoD adopted) Degradation of Solid Electrical Insulating Materials by Thermogravimetric Method (TGA). (DoD adopted) Combustion Bombs. Gasket
10、 Materials. (DoD adopted) - Standard Test Methods for Tension Testing of Nonmetallic Gasket Materials. (DoD adopted) ASTM E 144 - Standard Practice for Safe Use of Oxygen ASTM F 146 - Standard Test Methods for Fluid Resistance of ASTM F 152 (Application for copies should be addressed to the American
11、 Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959). 2.3 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, supersed
12、es applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.21, a sample shall be subjected to first article inspection in accordance with 4.2. 3.2 Material. 3.2.1 Composition. The packing material and construction shall
13、conform to that of the sample subjected to first article inspection (see 4.2). 3.2.2 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible provided that the material meets or exceeds th
14、e operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.3 Performance characteristics. 3.3.1 Flexibility. The packing shall be flexible enough to be readily formed into coils to fit a rod with a diameter which is equal to five times the size (cross-sect
15、ional width) of the packing. Any signs of voids or separations between the rod and the packing shall be cause for disqualification (see 4.5.1). immersed in the fluids specified in table I and shall meet the requirements OP 3.3.2.1 through 3.3.2.4. 3.3.2 Packing an4 fluid compatibility. The packing m
16、aterial shall be 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32034 9999906 2076665 527 W Medium Superheated steam Boiler feedwater Saturated low pressure steam Lube oil Navy distillate fuel Hydraulic oil Low-pressure air MIL-PRF-32034 (
17、SH) Maximum system II temperature (OF) 1050 475 4 95 250 225 150 550 TABLE I. Immersion fluids for compatibility tests. Distilled water ASTM no. 1 oil ASTM reference fuel B 3.3.2.1 Flexibility and fluid compatibility. Fluid media effect on flexibility shall be determined before and after fluid immer
18、sion (see 4.5.2.1). Any signs of vois or separations between the rod and the packing shall be cause for disqualification of a material for use in the fluid which caused the change. 3.3.2.2 Dimensional stability and fluid Compatibility. Fluid media effect on dimensional stability shall be determined
19、by comparing cross-sectional dimensions of a sample of 1/2-inch square packing after fluid immersion with packing dimensions before immersion (see 4.5.2.2). A 2 percent or greater change from the original dimensions shall be cause for disqualification of a material for use in the fluid which caused
20、the change. 3.3.2.3 Tensile strength and fluid compatibility. Fluid media effect on tensile strength shall be determined by comparing tensile strength measurements before and after fluid immersion (see 4.5.2.3). A tensile strength which is less than 95 percent of the tensile strength of the referenc
21、e (pre-immersion) material shall be cause for disqualification of a material for use in the fluid which caused the change. 3.3.2.4 Loss of lubricating substance. Fluid media effect on lubricating substance shall be determined by measuring the amount of lubricant lost after fluid immersion (see 4.5.2
22、.4). Any loss in weight greater than 10 percent shall be cause for disqualification of a material for use in the fluid which caused the change. 3.3.3 Thermogravimetric analyzer (TGA) analysis. Thermogravimetric analyses shall be conducted to determine weight loss as a function of heat (see 4.5.3). M
23、aterial weight loss as a function of heat shall be recorded and compared with original (pre-heating) material measurements. If weight loss exceeds 10 percent at a temperature which is less than the applicable temperature specified in table II, the material shall be disqualified. TABLE II. Applicable
24、 temperatures for intended service. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32034 999990b 207bbbb 4b3 e MIL-PRF-32034 (SH) b (b) Halogen concentration excluding fluoride shall not exceed 250 ppm and the packing manufacturer shall atte
25、st that the only intentionally-added, fluoride-bearing ingredient is polytetrafluoroethylene, or ppm when tested as specified in 4.5.4.1.1. (c) The sum of water-leachable halogens shall be less than 250 3.4.2 Total sulfur concentration. Packing materials shall be tested for total sulfur concentratio
26、n (see 4.5.4.2), which shall not exceed 700 ppm unless otherwise approved (see 6.8). 3.4.3 Mercury. During manufacturing, fabrication, handling, and packaging, 3.4.4 Other detrimental materials. For packing materials, the maximum the valve packing, shall not come into contact with mercury or mercury
27、 compounds. concentrations specified in table III also apply (see 4.5.4.3). TABLE III. Other detrimental materials. II Lead I 250 II 3.4.5 Asbestos and polychlorinated biphenyls (PCBs). No asbestos or PCBs shall be used in the packing material. 3.5 Simulated service testinq. Packing materials shall
28、be tested as specified in 4.5.5 for the duration of 100 hours and shall meet the requirements of 3.5.1, 3.5.3, and 3.5.4. 3.5.1 Packing gland leakage rates. All packing must form a 100 percent seal during hydrostatic tests and maintain seal with zero leakage during the 100- hour test. 3.5.2 Addition
29、 of packing rings. Additional packing rings may be added in accordance with the procedure specified in appendix A, A.3.3.2, step 2. 3.5.3 Compression of packing rings. When tested as specified in appendix A, the compression of packing rings greater than 50 percent shall be cause for rejection. 3.5.4
30、 Torque values. When tested as gpecified in appendix A, cycling torque and break away torque shall be not greater than 320 inch-pound (in-lb). Failure to meet these requirements shall be cause for rejection. Allowable tolerances of the square cross-sectional dimensions shall be as 3.6 W. Packing sha
31、ll be furnished in the size specified (see 6.2). specified in table IV. TABLE IV. Allowable tolerances of packing. cross-sec dimensions 1/2 and above +1/16 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32034 99999Ob 207bbb7 3TT MIL-PRF-32
32、034 (SH) 3.7 Form. The packing shall be furnished in the form of spools or reels in sizes and lengths as specified (see 6.2). on spools or reels according to the following: The packing shall be uniformly coiled Packing size (inches) Package 1/8 through 7/16 3/8 through 3/4 3/4 through 1 1-1/8 throug
33、h 2 1 or 5 pound spools 5 or 10 pound spools 25, 50 or 100 pound reels 50 or 100 pound reels 3.8 Visual examination and dimensions. A visual examination of the packing material shall be conducted to detect defects in workmanship and dimension that could affect its serviceability (see 4.4.1.1). 4. VE
34、RIFICATION 4.1 Classification of inspections. The inspection requirements specified herein are classified as follows: (a) First article inspection (see 4.2). (b) Conformance inspection (see 4.3). 4.1.1 Inspection conditions. Unless otherwise specified, all inspections shall be performed in accordanc
35、e with the test conditions specified in 4.4 and 4.5. 4.2 First article inspection. First article inspection shall consist of examinations and tests as specified in table V. TABLE V. First article inspection. InsDection Flexibility Fluid compatibility Flexibility Dimensional stability Tensile strengt
36、h Loss of lubricating substance TGA analysis Halogen concentration Total sulfur concentration Other detrimental materials Simulated service testing Packing gland leakage rates Compression of packing rings i Torque values Requirement 3.3.1 3.3.2 3.3.2.1 3.3.2.2 3.3.2.3 3.3.2.4 3.3.3 3.4.1 3.4.2 3.4.4
37、 3.5 3.5.1 3.5.3 3.5.4 Test method 4.5.1 4.5.2 4.5.2.1 4.5.2.2 4.5.2.3 4.5.2.4 4.5.3 4.5.4.1 4.5.4.2 4.5.4.3 4.5.5 4.5.5 4.5.5 4.5.5 4.3 Conformance inspection. Conformance inspection shall consist of examinations and tests as specified in table VI (for groups A, B, and C). 5 Provided by IHSNot for
38、ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32034 999990b 207bbb8 23b MIL-PRF-32034 (SH) I TABLE VI. Conformance inspection. I l Inspection Requirement 1 Group A Visual examination I 3.8 Dimensions I 3.8 Group B Flexibility Fluid compatibility Flexibility Dimen
39、sional stability Tensile strength Loss of lubricating substance TGA analysis Halogen concentration Total sulfur concentration Other detrimental materials Group C Simulated service testinq Packing gland leakage rites I 3.3.1 3.3.2 3.3.2.1 3.3.2.2 3.3.2.3 3.3.2.4 3.3.3 3.4.1 3.4.2 3.4.4 1 3.5 3.5.1 Te
40、st method 4.4.1.1 4.4.1.1 4.5.1 4.5.2 4.5.2.1 4.5.2.2 4.5.2.3 4.5.2.4 4.5.3 4.5.4.1 4.5.4.2 4.5.4.3 4.5.5 4.5.5 4.3.1 - Lot. For purposes of conformance and test sampling, a lot is defined as all finished packing of one size, produced in one facility, using the same production processes and material
41、s, and being offered for delivery at one time. 4.3.2 Sampling for conformance inspection. 4.3.2.1 Sampling for visual examination of gasket material. At a minimum, the contractor shall randomly select samples from each lot of COmDleted srools or reels as specified in table VII, and inspect them as s
42、pecified in-4.4.1.1- (see 6.6). TABLE VI1 . Sampling for visual examination of packing material. 281 to 500 4.3.2.2 Sampling for tests. At a minimum, the contractor shall randomly select a sample quantity from each lot of completed packing material as specified in table VIII, and test them as specif
43、ied in 4.4 and 4.5 (see 6.6). 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32034 = 9999906 2076669 172 MIL-PRF-32034 (SH) TABLE VIII. Sampling for tests. Lot size 2 to 25 26 to 50 51 to 90 501 to 1,201 1,201 to 3,200 3,201 to 10,000 10,0
44、01 to 35,000 4.4 Conformance tests. 4.4.1 Group A tests. Group A tests shall be performed for all conformance inspections (see 4.4.1. i) . 4.4.1.1 Visual examination and dimensions. Packing material shall be carefully examined by visual inspection to detect defects in workmanship and dimensions. For
45、 each spool or reel of packing material, major defects such as a rip, tear, hole, void, crease, crimp, gouge, or extraneous particulate matter on the surface shall be cause for rejection of that spool or reel. Minor surface defects not affecting the serviceability of the packing material shall not b
46、e cause for rejection. two-foot intervals along the length of two adjacent sides of the spool or reel, using a metal ruler graduated to 1/64-inch (see 3.6 and 3.8). Cross-sectional dimensions shall be measured at no less than 4.4.2 Group B tests. Group B tests may be omitted only if both of the foll
47、owing are true: (a) Within two years preceding the date current lot will be delivered by the contractor, the material has been tested and found in conformance with the group B requirements of table V. all respects as the sample subjected to first article inspection. (b) The material offered for deli
48、very is manufactured the same in 4.4.3 Group C tests. Group C tests may be omitted only if one the following is true: (a) Within three years preceding the date current lot will be delivered by the contractor, the material has been tested and found in conformance with the group C requirements of tabl
49、e V. all respects as the sample subjected to first article inspection. (b) The material offered for delivery is manufactured the same in 4.4.4 Composition or process change. Any changes in composition or process shall be promptly reported to the contracting activity. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32034 99999Ob 207bb70 994 MIL-PRF-32034 (SH) 4 4.5 Test methods. 4.5.1 F
