1、“ 9999906 198173b 272 W MIL-P- 19 152A(OS) 20 December 1974 SUPERSEDING MI L- P- 19 15 2 (Nord) Amendment 1 26 June 1957 MILITARY SPECIFICATION PACKINGS, HYDRAULIC, HIGH PRESSURE (FOR HYDROPNEUMATIC SYSTEMS) This specification has been approved for use by ali departments and agencies of the Departme
2、nt of Defense. 1. SCOPE 1.1 This specification covers high pressure hydraulic packingc used for sealing the counter-recoil plungers and the differential cylinder pistons and rods of hydropneumatic systems. All packings shall be the modified “U“ type and the size called for on the applicable drawings
3、 (see 6.2). 2. APPLICABLE DOCUMENTS 2.1 The following documents of the issue in effect on date of invi- tation for bids or requests for proposal form a part of this specifica- tion to the extent specified herein. SPEC IF ICAT IONS Federal QQ- B-6 13 QQ-B-637 QQ-C-450 Brass, Leaded and Non-Leaded, Fl
4、at Products Plate, Bar, Sheet and Strip Brass, Naval, Rod, Wire, Shapes, Forgings and Flat Products Copper-Alum Alloy, Alum Bronze Plate, Sheet, Strip and Bar Copper Alloy Numbers 606, 612, 613, 614 and 628 m Provided by IHSNot for ResaleNo reproduction or networking permitted without license from I
5、HS-,-,-QQ- S-69 8 QQ - S - 76 6 PPP-B-566 PPP- B-5 76 PPP- B-5 85 PPP-B-59 1 PPP-B-601 PPP-B-62 1 PPP - B-6 36 PPP- B-6 40 PPP-B-665 PPP - B- 6 76 Mi li tary MIL-P- 116 MIL- L- 10 54 7 MIL - L- 176 72 STAN DARDS Federal FED-STD-601 Military MIL-STD- 105 MIL-STD-129 2 m 99Ob 1981737 109 m Steel, Shee
6、t and Strip, Low Carbon Steel Plate, Sheet and Strip-Corrosion Resisting Box, Folding, Paperboard Box, Wood, Cleated, Veneer, Paper Overlaid Box, Wood, Wirebound Box, Fiberboard, Wood-C leat ed Box, Wood , C leated-Plywood Box, Wood, Nailed and Lock-Corner Box , Fib erb oard Box, Fiberboard, Corruga
7、ted, Triple-Wall Box, Fiberboard, Metal Stayed Box, Set Up Preservation, Methods of Liners, Case, and Sheet, Overwrap, Water- Vaporproof or Waterproof, Flexible Lubricating Oil, Hydraulic and Light Turbine, Non-Corrosive Rubber: Sampling and Testing Sampling Procedures and Tab les for Inspection by
8、Attributes Marking for Shipment and Storage Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-9999906 19L38 045 W MIL-P-l9152A(OS) DRAWINGS Naval Sea Svstems Command (Code Ident 10001 BUORD 165347 Pc. 2 (LF100134) BUORD 165347 Pc. 3 (LF100134) NAVORDSY
9、SCOM 180961 Pc. 6 (DF102127) Others BU SAN DA N 15 5 - 5 3 30 - 2- 5 BUSANDA N 155- 5 330- 2- 24 BUSANDA N155-5330-2-26 BUSANDA N 155- 5330- 2- 8 GSSO PD 5330-244- 3 GSSO PD 5330- 2 35- 5 (Copies of specifications , standards, drawings, and publications required by suppliers in connection with speci
10、fic procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) 3. REQUIREMENTS 3.1 First article. Packing furnished under this specification shall be a product which has been tested and passed the tests specified in 4.5.1 through 4.5.4. (see 6.3)
11、. Any change in product will necessitate retesting 3.2 Material, The packing material shall conform to applicable drawings be dense, grainless, nonporous, resilient , oil resistant, nonabrasive, shall have a low coefficient of friction and expansion, and shall be suitable for operation in contact wi
12、th oil conforming to MIL-L-17672, Military Symbol 2075. 3.3 Shape and size. The shape of the packing (in cross-section) shall be the modified “U“ type. assembling without having to resort to special or complicated fixtures, The packing shall be capable of 3 Provided by IHSNot for ResaleNo reproducti
13、on or networking permitted without license from IHS-,-,-MIL-P- 19152A(OS) and shall seal against the inside and outside containing walls of metal parts of standard dimensions shown on the applicable drawings for the particular hydropneumatic system. Unless otherwise specified on the applicable drawi
14、ngs, the tolerance on dimensions of the height of the packing ring shall be plus 0.02 inch, minus 0.00 inch. The packings shall conform to applicable drawings listed in 2.1. 3.4 Effect on oil. The packing shall not cause the formation of sludge or the discoloration or thickening of the oil in the di
15、fferen- tial system (see 4.5.1.2). 3.5 Reaction with metals. The packing shall not cause corrosion or pitting of the metals with which it is in contact. of the metals shall not be cause for rejecting the packing (see 4.5.1.3). Slight discoloration 3.6 Adherence to metals. The packing shall not adher
16、e or stick to the metals of the counter-recoil system with which it is in contact. The packing shall be considered as adhering or sticking to the metals if particles or pieces of the packing remain in contact with the metallic surfaces either through operation of the metallic parts in the packing or
17、 upon removal of the packing from the assembly (see 4.5.1.3). 3.7 Hardness. Packings shall show a Durometer “A“ hardness of 90 f 5 when tested as required in 4.5.1.1. 3.8 Oil absorption. The packing when in contact with oil or immersed in oil of a type used in the system, shall not show an increase
18、in volume exceeding 7.0 percent or a volume decrease exceeding 1.0 percent. exposure to oil the packing shall not break down, soften or roughen, particularly the sealing edges or lips, Upon 3.9 Temperature requirements. The packing shall function properly throughout the range of ambient temperatures
19、 at which the hydropneumatic system may be operated or stored. The temperature requirements shall be a minimum of -20“ Fahrenheit (F) and a maximum of 160“ F. shall also be capable of passing the cold temperature cycling test of 4.5.4. The packing 3.10 Packing friction. Packing friction on the count
20、er-recoil plunger and differential piston and rod of the cycling test set of 4.5.3.1 shall be a minimum consistent with proper sealing. -The counter-recoil plunger 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-0b 1981740 T3 MIL-P- 19152A(OS) pack
21、ing friction shall not prevent the proper return of the recoiling parts to battery within the time prescribed in the firing cycle for a particular gun or system. and continuous motion of the recoiling parts during their return to battery, The packing shall not alternately grab and release the counte
22、r- recoil plunger causing a jerky and uneven movement of the recoiling parts during their return to battery. piston and rod shall not prevent the piston and rod from immediately responding to the differential pressure in the system, nor shall packing friction prevent the proper protrusion of the pis
23、ton rod. The packing friction shall not prevent smooth Packing friction on the differential 3.10.1 Heating. During operation of the system the allowable tempera- ture of the counter-recoil plunger, due to packing friction, shall not exceed 130“ F. to packing friction shall not be considered, since d
24、uring operation of the system the piston and rod may not move at all or its movement may be negligibly small. Temperature rise of the differential piston and rod due 3.11 Scoring. The packing shall at no time cause scoring, scratching, or wearing away of metal from the plunger and the differential p
25、iston and rod. 3.12 Leakage. The plunger packing shall be capable of holding the air pressure in the air chamber as specified in the contract or order (see 6.2) during periods of operation, idleness, or storage of the system. holding the oil in the differential system during periods of operation, id
26、leness, or storage of the system, The differential piston and rod packing shall be capable of 3.13 Storage. Packing when properly packaged and packed shall be Upon capable of being stored for 5 years without showing evidence of any deterioration that would in any way impair its serviceability. remov
27、al from storage the packing shall meet all the requirements as set forth herein. 3.14 Identification. Packing furnished under this specification shall not be identification marked on the packing itself. Identifica- tion shall be made by marking the packing container or by attaching a tag to individu
28、al packing rings or groups of rings. The date of manu- facturing shall be shown, with type and size noted. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P- 19 152A(OS) 3.15 Performance, Packings furnished under this specification shall be onl
29、y those products which have met stipulated requirements and have been subjected to and passed the first article tests as specified herein, The following tests comprise the parameters of performance. a. 4.5.1 - Physical properties tests b. 4.5.2 - Friction evaluation test c. 4.5.3 - Five thousand cyc
30、le endurance d. 4.5.4 - Cold temperature cycling test test 3.16 Workmanship. Workmanship shall be of such qua ity as -3 produce a uniform product in accordance with the detailed requirements of the applicable drawings and this specification. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for ins
31、pection. Unless otherwise specified in the contract or purchase order, the supplier is responsible for the perfor- mance of all inspection requirements as specified herein. Except as otherwise specified in the contract or order, the supplier may use his own or any other facilities suitable for the p
32、erformance of the inspec- tion requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed req
33、uirements, 4.2 Classification of inspections, The inspection requirements speci- fied herein are classified as follows: a. First article inspection (see 4.3 and 6.3) b. Quality conformance inspection (see 4.4) . 4.3 First article inspection. The first article inspection of the packings shall consist
34、 of all the tests and examinations of this speci- fi cat ion. 4.3.1 First article inspection samples. First article inspection samples shall be submitted as specified by the contracting officer or agency, The acceptable quality level (AQL) for first article inspection shall be 1.5 percent defective.
35、 If the AQL falls below 1.5 percent in any phase of the tests, the packing shall fail to qualify. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-= 06 LI.1742 576 MIL-P- 19 152A(OS) 4.4 Quality conformance inspection (end item testing). The examina-
36、tion and tests comprising quality conformance inspection shall consist of the examination of 4.4.2, and tests 4.5.1.1, 4.5.1.2, and 4.5.1.3. 4.4.1 Sampling. 4.4.1.1 Inspection lot. A lot shall consist of finished packings of the same material, type, style, and size produced under essentially like co
37、nditions, fabricated by the same process, and produced as one continuous run or order, or part thereof, and submitted for quality conformance inspection at the same time. in accordance with MIL-STD-105. Presentation of lots shall be 4.4.1.2 Sampling for quality conformance inspection tests (see 4.5)
38、. Samples of packings, all sizes included, shall be taken from a single production lot for testing in accordance with MIL-STD- 105 at Inspection Level II. The AQL shall be 1.5 percent defective. 4.4.1.3 Sampling for visual and dimensional examination (see 4.4.2) . A random sample of packings shall b
39、e taken from each lot in accordance with MIL-STD-105, Inspection Level S-l. de fe ct i ve . The AQL shall be 2.5 percent 4.4.1.4 Examination of preparation for delivery. An examination shall be made to determine that packaging and packing requirements comply with section 5 of this specification. The
40、 inspection shall be Inspection Level S-2 and the AQL shall be 2.5 defects per hundred units in accor- dance with MIL-STD-105. 4.4.2 Examination for visual and dimensional defects. Each packing taken at random as specified in 4.3.1 or 4.4.1.3 as applicable, shall be examined to verify conformance to
41、 requirements of this specification. Examination shall be conducted in accordance with table I. Packings having one or more defects shall be rejected. 4.5 Test methods. 4.5.1 Physical properties tests. 4.5.1.1 Durometer hardness test. The packing shall be subjected to a hardness test to determine co
42、mpliance with the requirement of 3.7. The Durometer “A“ hardness shall be determined in accordance with method 3021 as specified in FED-STD-601. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-m 9Ob 1981743 402 m MIL- P- 19 152A( OS) Table I CLASSI
43、FICATION OF DEFECTS FOR VISUAL AND DIMENSIONAL Cat egori es Critical Maj or 10 1 102 EXAMINATION OF THE END ITEM Defects None defined AQL = 1.5 percent Shape not in accordance with applicable drawings Dimensions of the height exceeds tolerance of plus 0.02 inch, or minus 0.00 inch Inspection method
44、- SIE E Visual SIE ISIE - Standard inspection Equipment. 4.5.1.2 Oil absorption test. The packing shall be tested for its oil absorption properties to determine compliance with the requirements of 3.8. of the packing shall be used. accurately weighed in air to the nearest milligram. This first weigh
45、t shall be called W1. The specimen shall then be weighed to the nearest milligram in distilled water at 25 centigrade (C) by suspending it in the water with a fine wire, from the total weight. weighing in water care must be taken that the specimen is free from adhering air bubbles, and, if necessary
46、, it may be first wetted by dipping into 95 percent alcohol or a 0.2 percent solution of aerosol OT in water and rinsed with distilled water. After this second weighing the specimen must be blotted dry with filter paper. then be completely immersed in a container of ASTM Oil No. 3 of method 6001, FE
47、D-STD-601, and allowed to remain in the oil for a period of 70 hours I 1 hour at 150“ $: 2“ F. The container shall conform to 3.9.2 of method 6001, FED-STD-601. At the end of this oil immersion period the specimen shall be removed and cleaned by rapidly rinsing it with petroleum ether (boiling point
48、 30“ C to 60“ C), shall then be weighed in air to the nearest milligram. weight shall be called W3. as described above, This fourth weight shall be called Wq. Percent volume change of the specimen is equal to The water displacement method of measuring the change of volume The packing specimen shall
49、first be The weight of the wire must be deducted When This second weight shall be called W2. The specimen shall The specimen This third The specimen shall then be weighed in water 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-= 9999906 3983744 349 MIL-P- 19152A(OS) A positive answer represents an increase in volume of the packing. 4.5.1.3 Corrosion a
