1、MILITARY SPECIFICATION CYLINDER, DEHYDRATOR This specification is approved for use by all Department and Agencies of the Department of Defense I INCH-POUND I I I MIL-C-83960A (USAF) 28 NOV 88 SUPERSEDING 15 APRIL 1971 MIL-C-83960 1. SCOPE. 1.1 Scope. This specification covers the requirement for one
2、 type of oxygen purifier cylinder. 2. APPLICABLE DOCUMENTS. 2.1 Government documents. 2.1.1 Suecifications and standards. The following specifications and standards form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of these documents shall be th
3、ose listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation. SPECIFICATIONS Federal 0-T-620 1, 1, 1-Trichloroethane TT-1-735 Isopropyl Alcohol TT-N-95 Naphtha, Aliphatic PPP-B-636 Box, Fiberboard Militarv MIL-P
4、-116 Preservation, methods of MIL-C-4952 Desiccant, Dehydrator Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: WR-ALC/“IRFW, Robins AFB, GA 31098-5609 by using the self-addressed Standardization
5、 Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A THIS DOCUMENT CONTAINS 7 PAGES. DISTRIBUTION STATEMENT A . Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without l
6、icense from IHS-,-,-STANDARDS Military MIL-STD-105 Sampling Procedures and Tables for Inspection by Attributes MIL-STD-129 Marking for Shipment and Storage MIL-STD-130 Identification Marking of US Military Property Precedence for the Selection of MIGSTD- 143 Specifications and Standards, Order of MS
7、28775 Packing, Preformed, Hydraulic, Plus 275 Deg F. (O-Ring) 2.1.2 Government drawings. The following Government drlwing forms a part of this specification to the extent specified herein. Unless otherwise specified, the issue shall be that in effect on the date of the solicitation. DRAWINGS Air For
8、ce 7032094 Cylinder, Assembly, Oxygen Purifier (Copies of specifications, standards, handbooks, drawings, publications, and other Government documents required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the cont
9、ractirlg activity. 2.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein (except for associated detail specifications, specification sheets or MS standards), the text of this specification shall take precedence. Nothing in this spe
10、cification, however, shall supersede applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First Article. This specification makes provisions for first article testing. See 4.3 and 6.3. 3.2 Components. The cylinder shall consist of all the components show
11、n on drawing 7032094 and associated drawings. 3.3 Selection of specifications and standards. Specifications and standards for necessary commodities and services not specified herein shall be selected in accordance with MIL-STD-143. 3.4 Materials. Unless otherwise specified, materials shall be as spe
12、cified on drawing 7032094 and associated drawings. 3.4.1 Packing. O-ring seals shall be in accordance with the configuration and design of MS28775. The material shall be suitable for use with oxygen and shall pass the seal material oxygen compatibility test specified in 4.7.6. 3.5 Design and constru
13、ction, The cylinder shall be designed for working pressures of 5,000 pounds per square inch gauge (psig) and burst pressures of not less than 20,000 psig as specified on Drawing 7032094 and associated drawings. 3.5.1 Cleaning and degreasing. Provided by IHSNot for ResaleNo reproduction or networking
14、 permitted without license from IHS-,-,-3.5.1.1 Cleanitlg and degreasing prior to final assembly. After testing, the cylinder body, cap head assembly without pressure seals, perforators, and all other metal parts shall be cieaned and degreased before final assembly. All traces of oils, waxes, grease
15、s, or other contamiliants Wikh codb present a health, odor, or safety hazard when the cylinder is pressurized to 5,000 psi-with 99.5 percent purity gaseous oxygen shall be removed. Cleaning and degreasing shall be accomplished by one of the following or equally effective methods. 3.5. l. l. 1 Method
16、 A. A vapor degreasing method with trichloroethylene Conforming to O-T-620 shall be used. The cylinder and parts shall be blown clean and dry with a stream of cleq dry, oil-free air or nitrogen until all traces of the trichloroethylene fluid have been removed. 3.5.1.1.2 Method B. The cylinder and pa
17、rts shall be flushed with naphtha conforming to TT-N-95 and blown clean and dry of all solvent with oil-free air. All parts shall then be flushed with fluid conforming to TT-1-735 or anhydrous ethyl alcohol and rinsed thoroughly with fresh, clean water. Following this, all parts shall be thoroughly
18、dried with a stream of clean, dry, oil-free air, 3.5.1.1.3 Method C. The cylinder and parts shall be flushed with a hot, inhibited, alkaline cleaner until all traces of foreign matter have been removed and thoroughly rinsed with clean water and then thoroughly dried with a stream of clean, dry, oil-
19、free air. 3.5.1.1.4 Final assembly. The pressure seals shall be incorporated after the cylinder components are clean and dry to preclude the possibility of the cleaning fluid reacting with the pressure seals. Following component inspection for cleaning effectiveness and final assembly, the inlet and
20、 outlet ports shall be closed with removable plugs or caps to prevent the entry of contaminants. 3.6 Identification of product. Each cylinder shall be marked for identification in accordance with MIL-STD-130 as specified for an assembly. 3.6.1 Additional Marking. Additional marking shall be provided
21、 to specify that the type MA- 1 or MA-2 Cartridge, conforming to MIL-C-4952, is to be used in the cylinder. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of all inspecti
22、on 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 performance of the inspection requirements specified herein, unless disapproved by the Govern- ment. The Government reserves the right to
23、 perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4. l. 1 Responsibility for compliance. All items must meet all requirements of sections 3 and 5. The inspection set forth in
24、this specification shall become a part of the contractors overall inspection sys- tem or quality program. The absence of any inspection requirements in the specification shall not relieve the contractor of tlxe responsibility of assuring that all products or supplies submitted to the Government for
25、acceptance comply with all requirements of the contract. Sampling in quality conformance does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to acceptance of defective material. 4.2 Classification of tests. The inspection testing o
26、f cylinders shall be classified as follows: a. First Article b. Acceptance tests 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4.3 - FIRST ARTICLE. 4.3.1 Test Samples. The First Article test sarnples shall colisist G fur Cllpkt Cylinder mblies- 4
27、.3.2 First Article Tests. The First Article tests shall consist of all the tests desc3bed under 4.6 and 4.7. The Burst Test (4.7.5) shall be performed on the following: a. Two samples after all other tests are completed. b. Two samples after all other tests excluding the Cycling Test (4.7.4) are com
28、pleted. 4.4 Acceptance tests. Acceptance tests shall consist of: a. Individual tests b. Sampling plans and tests 4.4.1 Individual tests. Each cylinder shall be subjected to the following tests as described under para- graphs 4.6 and 4.7: a. E-xamination of Product b. Material Hardness Examination c.
29、 Hydrostatic Pressure d Cleaning Effectiveness 4.4.2 Sampling plans and tests. 4.4.2.1 Lot. A lot shall consist of cylinders manufactured under essentially the same conditions and submitted for inspection at substantially the same time. 4.4.2.2 Sampling plan. Sampling plan test samples shall be sele
30、cted in accordance with inspection level S-2 of MIL-STD-105 and shall be subjected to the following tests as described under paragraph 4.6 and. 4.7: a, Dimensional Examination b. Cylinder Leakage c. Cartridge to Cylinder Seal d. cycling e. Burst Pressure 4.4.3 Rejection. A sample failing to pass any
31、 examination or test shall be cause for rejection of the lot. 4.5 Test conditions. 4.5.1 Pressure measurements. Pressures shall be recorded in pounds per square inch gauge (psi). 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-C-83760A 44 W 797
32、7706 0223145 b W O O a 4.5.2 Preparation for test. The cylinder shall he prepared for testing as required hy the specific test instructions. 4.5.3 Observations. During the progress of all tests. the performance of the cylinder shall be observed to determine the degree of compliance with all requirem
33、ents specified herein. 4.5.4 Test data. Test data shall be recorded as required under the specific tests. 4.5.4.1 Tolerance. The tolerance on pressure readings shall be accurate to within 2 percent of the num- erical figure recorded. 4.6 Examinations. 4.6.1 Examination of product. The cylinder shall
34、 be examined to determine compliance with the require- ments specified herein with respect to materials, workmanship, finishes, and marking. 4.6.2 Dimensional examination. The cylinder shall be examined to determine dimensional compliance with drawing 702094. 4.6.3 Material hardness examination. The
35、 materials hardness shall be within the range specified on the applicable drawings. Materials harder or softer than those specified shall be cause for rejection. 4.7 Test methods. 4.7.1 Cylinder leakage. With the outlet (upper port) of the cylinder plugged, the cylinder (without mounting brackets or
36、 cartridge inserted) shall be pressurized to 5,000 psig with clean, dry, oil-free air or nitrogen. The cylinder shall be submerged in water for a minimum of 5 minutes to check for leakage. A definite continuous forming and breaking away of air bubbles from definite points on the surface of the , cyl
37、inder shall be an indication of leakage and cause for rejection. Presence of bubbles clinging to the sur- face of the cylinder or occasional formation of bubbles due to escape of air trapped within threads shall not be considered cause for rejection. 4.7.2 Hydrostatic pressure. The cylinder shall be
38、 hydrostatically pressurized to 7,500 psi and inspected for leaks or damage. Water shall be used for pressurization. 4.7.3 Cartridge-to-cylinder seal. With the bottom perforator blade removed, a cartridge or can conform- ing to MIL-C-4952 shall be inserted in the cylinder, using an appropriate space
39、r or shims so that the car- tridge is in its proper position in the cylinder. The cap shall then be tightened and the cylinder pressurized with clean, dry, oil-free air or nitrogen alternately from each connection to not less than 15 psig and held at this pressure for 5 minutes. No leakage shall res
40、ult past the cartridge-to-cylinder seal in either direc- tion. A definite forming and breaking away of air or nitrogen bubbles as a result of leakage from either connection as determined by a connected tube with the free end submerged in a beaker of water shall be cause for rejection. 4.7.4 Cycling.
41、 The cylinder shall be cycled 1,000 times from O to 5,000 psig hydrostatically. One cycle constitutes pressurization from O psig to 5,000 psig and reduce to O psig. 4.7.5 Burst pressure. The cylinder shall be hydrostatically pressurized until failure. Failure occurring at a pressure less than 20,000
42、 psi shall be cause for rejection. A special cap-to-body seal. such as a high- durometer O-ring or suitable backup ring may be used for this test. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4.7.6 Sea material oxygen compatibility. One-half gra
43、m of the material to be tested shall be placed in a reaction chamber. The temperature of the reaction chamber shall be raised to + 160“ f 2“F, and main- tained at this temperature for 10 minutes. At the end df 10 minutes, a pressure of 2,000 psig of 99.5% purity gaseous oxygen shall be applied insta
44、ntaneously. The applied temperature and pressure shall be maintained at a constant level for 5 minutes. At the end of this interval, the pressure shall be released and reapplied instantaneously. A sudden rise of more than 77F during application of pressure or a discolora- tion or change in appearanc
45、e of the sample under test shall be considered evidence of combustion and shall constitute failure of this test. 4.7.7 Cleaning effectiveness. 4.7.7.1 Visual inspection. During and after assembly, the cylinder components shall be visually examined for evidence of corrosion products, metal chips, sca
46、le, oil, grease, paints, preservatives, decals, or other con- tamination or foreign matter. Any evidence of contamination or foreign matter shall require recleaning and retest. 4.7.7.2 Ultraviolet light inspections. All cylinder surfaces and component parts that will contact the gas flowing through
47、the cylinder shall be visually inspected for hydrocarbons with ultraviolet light. With all assemblies and subassemblies complete and withpressure seals installed, all parts and surfaces of the cylinder body and cap that wll contact the gas flow shall again be visually inspected for hydrocarbons with
48、 ultraviolet light. Evidence of fluorescence during either inspection shall require recleaning and retest. 4.8 Inspection of preparation for delivery. Preservation, packaging, packing, and marking shall be inspected to determine conformance to the requirements of section S. 5. PACKAGING. 5.1 Preserv
49、ation and Packaging, Preservation and packaging shall be Levels A or C as Specified (see 6.2). 5. I. 1 Leve. A. 5. l. l. 1 Cleaning and Drying. The cylinder shall be thoroughly cleaned and dried in accordance with the requirements as specified in Para. 3.5.1 which will insure that all parts are clean and free of oils and any of these foreign matter that might adversefy affect the operation of the cylinder. S. 1.1.2 Preservation and Packaging. The cylinder shall be packaged, one
