1、MILIT. MIL-G-$1575 (AS) I July 1968 RY SPECIFICATI CYLINDER, NITROGEN, FOR RESCUE HANDTOOL This specification has been approved by the Naval Air Systems Command, Department of the Navy. 1. SCOPE 1.1 Scope - This specification covers a puncturable seal type nitrogen gas filled cylinder. 2. APPLICABLE
2、 DOCUMENTS 2.1 The following documents of the issue in effect on date of invitation for bids or request for proposal, form a part of this specification to the extent speci- fied herein. SPECIFICATIONS Federal BB-N-411 Nitrogen, Technical QQ-P-416 Plating, Cadmium (Electrodeposited) TT- C-490 Cleanin
3、g Methods and Pretreatment of Ferrous Surfaces for Organic Coatings PPP-B-636 Box, Fiberboard Military MIL- P- 1 16 MIL-D-69 98 Dichloromethane, Technical Preservation, Methods of STANDARDS Military MIL-STD-105 Sampling Procedures and Tables for Inspection by Attributes Provided by IHSNot for Resale
4、No reproduction or networking permitted without license from IHS-,-,-MIL-C-81575 (AS) STANDARDS Military (Contd) MIL-STD- 129 MIESTD-130 MIL-STD-794 Marking for Shipment and Storage Identification Marking of U. S. Military Property Parts and Equipment, Procedure for Packaging and Packing of (When re
5、questing any of the applicable documents, refer to bothtitle andnumber. All requests shouldbe made viathe cognizant Government quality assurance representative. Copies of this specification andother unclassified specifications, standards, and drawings requiredby contractors in connection with specif
6、ic procurement functions shouldbe ob- tainedupon application to the Commanding Officer, Naval Supply Depot (Code 1051), 5801 Tabor Avenue,Philadelphia, Pennsylvania 19120, All other documents should be obtainedfrom the procuring activify or as directedby the contracting officer.) 3. REQUJREMENTS Fir
7、st article - This specification makes provisions for first article inspection. Materials - Materials used in the construction of the cylinder shall be in accordance with the applicable drawings and this specification. 3.2.1 Nitrogen - The nitrogen used in the cylinders shall conform to BB-N-411, Typ
8、e I, Grade B, Class 1. Construction - The cylinders shall be constructed in accordance with Performance - Cheanliness - The cylinder, when tested as specified in 4.6.1.1, 3.4.1 shall pass the requirements specified in Table II. 3.4.2 Gas charge - The cylinder, when tested as specified in 4.6.2, shal
9、l: (a) not show any evidence of deformation. (b) weigh not less than9 grams nor more than 10 grams at 3000psig. Leakage - The cylinder, when tested as specified in 4.6.3, shall 3.4.3 not show any evidence of gas bubbles after 1 minute of submergence. Provided by IHSNot for ResaleNo reproduction or n
10、etworking permitted without license from IHS-,-,-MIL-C-81575 (AS) d s a 7 31 cil s d s u n Y 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-81575 (As) 3.4.4 Cyclic leakage - The cylinder, when tested as specified in 4.6.4, shall not show any
11、 evidence of leakage. 3.4.5 Hyarostatic pressure - The cylinder, when tested as specified in 4.6.5, shall not show any evidence of bursting. 3.4.6 Rupture - The cylinder, when tested as specified in 4.6.6, shall not show any evidence of splintering or fragmentation. Complete separation of the punctu
12、rable area or any portion of the cylinder shall be considered as fragmentation. 3.4.7 Maximum filling density - The cylinder, when tested as specified in 4.6.7, shall have a maximum filling density of 24 percent. The filling density is the percent ratio of the weight of nitrogen in a container to th
13、e weight of water that container will hold. The maximum filling density shall be determined as follows: Weight of Nz Weight of H20 Filling density = 3.5 Finish - The surface of the cylinder shall be cleaned in accordance with Method 1 of TT-C-490 and cadmium plated in accordance with the requirement
14、s for Type I, Class C of QQ-P-416. 3.6 Identification of product - The cylinder shall be marked for identification in accordance with MIESTD-130. The cylinder shall be marked by ink stamping with letters not less than 1/4 inch high to indicate the following information: Cylinder, Nitrogen, 3000 PSI,
15、 for Hand Power Tool Manufacturer Identification Date of Manufacture Gross Weight Grams MIL- C-81575 A directional arrow, as shown in Figure 1, with the word “INSERTf1 as a guide, shall be ink stamped, with letters not less than 1/8 inch high, along the body of the cylinder and to the left of the in
16、formation stated above. 3.6.1 Indicated gross weight shall be th.e empty weight of the cylinder (rounded off to the next higher l/Z gram) plus theweight of the minimum gas charge. 3.7 Workmanship - The cylinders shall be uniform in quality and shall be free from irregularities or defects which could
17、 adversely affect safety, performance, reliability, or durability. The cylinders shall be free of oil, grease, fuel, water, dust, dirt, or any other foreign matter. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4. QUAUTY ASSURANCE PROVISIONS 4.1
18、Responsibility for inspection - Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of dl inspection requirements as specified herein. Except as otherwise specified in the contract or order, the supplier may use his own or any other facilitie
19、s suitable for the performance of the inspection 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
20、 to prescribed requirement s. (a) First article inspection - First article inspection shall consist of examinations and tests performed on samples which are representative of the production item after award of a contract to determine that the production item conforms to the requirements of this spec
21、ification (see 4.3). inspection consists of examinations and tests performed on individual products or lots to determine conformance of the products or lots with the requirements set forth. in this specification (see 4.4). cylinders shall consist ofexkinations andtests for ail the requirements of th
22、is specification. 4.3.1 First article inspection samples - Unless otherwise specified, as soon as practicable after the award of the contract or order, the manufw- turer shall submit 4 cylinders. Tke samples shall be representative of the construction, workmanship, components, and materials to be us
23、ed during pro- duction. When a contractor is in continuous production of these cylinders from contract to contract, submission of further first article samples on the new contract may be waived at the discretion of the procuring activity (see 6.2). Approval of the first article samples or the waivin
24、g of the pre- production inspection does not preclude the requirements of submitting to the quality conformance inspection. The first article samples shall be fur- nished Government as directed by the contracting officer (see 6.2). Provided by IHSNot for ResaleNo reproduction or networking permitted
25、 without license from IHS-,-,- - flIL-ci1575 81 m 9999906 0289611 7 m 4.3.2 Upon completion of the first article inspection, all the applicable inspection reports and when applicable, recommendations and comments pertinent for use in monitoring production will be forwarded to the cognizant Governmen
26、t activity. Two approved cylinders will be returned to the manufacturer for use in monitoring production. The other cylinders will be consumed or destroyed in the first article inspection and shall not be considered as part of the quantity to be delivered under contract. 4.4 Quality conformance insp
27、ection - The quality conformance inspection Visual examination of the filled cylinders Dimensional examination of the filled cylinders Gas Charge Leakage Deformation Cyclic leakage Hydrostatic pressure Rupture Maximum filling density Preparation for delivery shaIl consist of the following tests and
28、examinations: 4.4.1 Sampling 4.4.1.1 Inspection lot - 4.4.1.1,l Cylinder - An inspection lot size shall be expressed in units of one cylinder made under essentially the same conditions and from the same materials. The sample unit shall be one cylinder. , 4.4.1.1.2 Preparation for delivery - An inspe
29、ction lot size shall be expressed in units of one fully prepared shipping container, containing cylinders fully prepared for delivery, made from essentially the same materials. The sample unit shall be one shipping container, containing cylinders fully prepared for delivery with the ex- ception that
30、 it need not be sealed. 4.4.1.2 acceptance criteria, tests, and examinations required for the cylinders shall be as specified in Table I. Sampling for tests and examinations of cylinders - The sample size, 4.5 Test conditions - 4.5.1 a- Unless otherwise specified, the .gas used in testing shall be n
31、itrogen conforming to BB-N-411, Type 1, Class 1, Grade B. 4.5.2 Cleanliness solvent - The solvent used in the-cleanliness test shall be dichloromethane conforming to MIL-D-6998. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-1575 1 777770b02
32、7b12 O = MIL-G-81575 (AS) TABLE I SAMPLE SIZE, ACCEPTANCE CRITERIA, TESTS AND EXAMINATION OF THE CYLINDERS I INSPECTION Visual examination (see Classification of Defects) Dimensions Gas charge Leakage Cyclic leakage Hydrostatic pres- sure Rupture z/ Maximum filling density Examination of preparation
33、 for delivery I METHOD I SAMPLF, SIZE ACCEPTANCE CRITERIA L/ PARIIGRAPHI 4.6.1.1 4.6.1.1.1 4.6.2 4.6.3 4.6.4 4.6.5 4.6.6 4.6.7 4.6.1.2 Every cylinder for critical defects. In- spection Levei II L/ or minor defects. e Reject all units with any crit- ical defects. An Acceptable Quality Level of 2.5 de
34、fects per hundred units for minor defect s. Inspection Level s- 2 An Acceptable Quality Level of 2.5 defects per 100 units Inspection Level s- 2 An Acceptable Quality Level of 2.5 defects per 100 units Inspection Level s-2 Inspection Level s- 2 Inspection Level s- 2 An Acceptable Quality Level of 2.
35、5 defects per 100 units An Acceptable Quality Zevel of 2.5 defectsper 100 units An Acceptable Quality Level of 2.5 defects per 100 units Inspection Level s-2 2/ Inspection Level s- 3 An Acceptable Quality Level An Acceptable Quality Level of 2.5 defects per 100 units I -. - Inspection Level s- 2 An
36、Acceptable Quality Level of 4. O defects per 100 units - i/ The sample size shall be based only on the applicable sample size code letter corre- spending to the specified inspection level of MIL-STD-105. - 2/ These are destructive tests (see 6.2). 7 - . Provided by IHSNot for ResaleNo reproduction o
37、r networking permitted without license from IHS-,-,-MIL-C-81575 (AS) 4.5.3 Temperature and pressure - Unless otherwise specified, tests shall be conducted at local ambient temperature and barometric pressure. The temperature and barometric pressure shall be recorded at the time of inspection. This i
38、nformation shall be available for computation of test data, where required, to normal temperature and pressure (NTP) conditions. NTP conditions are 29.92 inches of mercury and 70“ F. Test instruments shall be calibrated or adjusted according to their required usage in conducting individual tests. 4.
39、6 Inspection methods - 4.6.1 Visual examination- 4.6.1.1 Cylinder - Every cylinder shall be examined visually (for critical defects) to determine conformance to this specification. The classification of defects, Table II, shall be used to classify the defects found. 4.6.1.1.1 Dimensions - The cylind
40、ers shall be checked dimensionally to de- termine conformance to the dimensions specified in applicable drawing. 4.6.1.2 Preparation for delivery - Each of the fully prepared shipping con- tainers, containing cylinders selected as a sample unit from the lot shall be examined to determine that the pa
41、ckaging, packing, and marking conform to this specification. The classification of defects, Table III, shall be used to classify the defects found. 4.6.2 Gas charge - Each cylinder shall be weighed prior to charging with nitrogen. The cylinder shall then be charged with nitrogen, conforming to BB-N-
42、411, Type I, Grade B, Class 1, at 3000 psig and then heated to a temperature of plus 160 +5“ Fahrenheit, and maintained at this temperature for 20 minutes, After the 20 minute period the cylinder shall meet the requirements of 3.4.2 (a). After a period of 24 hours the cylinder shall meet the require
43、ments of 3.4.2 (b). 4.6.3 Leakage - The cylinder shall be charged to 3000 psig. With the pressure maintained the cylinder shall be immersed in a water solution (1 percent aerosol OT clear, 25 percent or equal) to a depth so that the uppermost portion of the cylinder is at least 1 inch below the wate
44、r level for a period of two minutes. A 20-inch vacuum (Mercury) shall be maintained above the surface of the solution and the cylinder shall pass the requirements specified in 3.4.3. 4.6.4 Cyclic leakage - Filled cylinders (3000 psig) shall be subjected to two complete temperature cycles. One cycle
45、shall consist of maintaining the cylinder at minus 65 -C5“ Fahrenheit for two hours, and the second cycle shall consist of main- taining the cylinder at plus 160 *5“ Fahrenheit for two hours. The cylinder shall then pass the requirements of 3.4.4. After completion of the temperature cycles, the cyli
46、nder shall 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-81575 (AS) TABLE II CLASSIFICATION OF DEFECTS FOR VISUAL EXAMINATION OF THE CYLINDER DEFECTS incorrect outlet configuration incorrect, incomplete, or faulty finish incorrect type or c
47、lass . Flaw in the material Incorrect or incomplete marking Incorrect color Abnormally distorted or nonuni- form weld Loose particles inside the cylindel Rust or scale Irregularities in the internal sur- face greater than 1/16 inch Existence of any foreign material, solid or liquid TABLE III LIST OF
48、 DEFECTS FOR PREPARATION FOR DELIVERY ITEM Exterior and interior markings DEFECTS Missing, incorrect, incomplete, illegible; of improper size, location, sequence; or method of application; markings not the same on the interior and exterior con- tainers. 9 Provided by IHSNot for ResaleNo reproduction
49、 or networking permitted without license from IHS-,-,-TABLE III (Contd) ITEM Packaging and packing materials Workmanship Exterior and interior weight or content DEFECTS Any nonconforming component; any component missing, damaged, or other- wise defective. Inadequate application of the components such as incomplete closure of the unit package, intermediate package, container flaps, loose stra
