1、- SAE ARP*LbLbA 9% 7943725 OOOLOBB L I AEROSPACE The Engineering Society =FOT Advancing Mobiiiiy -Land Sea Air and Space RECOMMENDED INTERNATIONAL 400 Commonwealth Drive, Warrendale, PA 15096-0001 PRACTICE Submitted for recognition as an American National Standard REV. JrT ARP1616 A Issued 1983-04-0
2、4 Revi sed 1991-04-05 SAE Technical Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement ari
3、sing therefrom, is the sole responsibility of the user.“ SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. CAE invites your e written comments and suggestions. Copyright 1991 Soclety of Automotive Engineers, Inc. All rights reserve
4、d. Printed in U.S.A. COPYRIGHT SAE International (Society of Automotive Engineers, Inc)Licensed by Information Handling Services- SAE ARPrLbLbA 9% 79437125 OOOL089 3 SAE ARP1616 Revislon A 1. SCOPE: 1.1 Thls document defines design, performance, and test criteria for self-sealing breakaway valves fo
5、r use in crash-resistant aircraft fuel systems. 2. REFERENCES: 2.1 Appllcable Documents: The following documents oflssue in effect on the date of invitation for bids or request for proposal form a part of this document to the extent speclfled herein. text of thls document, the latter shall govern. I
6、n the event of conflict between these documents and the 2.1.1 SAE Publications: Available from SAE, 400 Commonwealth Drlve, Warrendale, PA 15096. ARP868 Pressure Drop Test for Fuel System Components AS1055 Flre Testlng of Flexible Hose Tube Assemblies, Colls, Fittings General Specification for MIL-T
7、-5624 Turbine Fuel, Aviation, Grades JP-4 and JP-5 MIL-T-31000 Techni cal Data Packages, General Specif i cation for MI L-T-83133 Turbine Fuel, Aviation, Kerosene Type, Grade JP-8 U.S. Government Publications: Available from Standardization Documents Order Desk, Building 4D, 700 Robbins Avenue, Phil
8、adelphia, PA 19111-5094. P-D-680 Dry C1 eani ng and Degreasi ng Sol vent QQ-A-367 Al umi num Al loy Forgings QQ-S-763 Steel Bars, Wire, Shapes, and Forgings, Corrosion Resisting TT-S-735 Standard Test Fluids, Hydrocarbon FED-STD-No. 595 Colors ASTM Publications: Available from ASTM, i916 Race Street
9、, Philadelphia, PA 19103. ASTM D 910 Standard Specification for Aviation Gasoline ASTM D 1655 Standard Specification for Aviation Turbine Fuels 3. REQUIREMENTS: 3.1 3.2 Qual i ty Assurance: This document makes provi sions for recommended qua conformance testing. Descri pt i on : fication and qua The
10、 requirement of this section applies to the design of breakaway self-sealing valves including the performance and design of the se mechanism and the frangible section of the valve. f-seal i ng -3- COPYRIGHT SAE International (Society of Automotive Engineers, Inc)Licensed by Information Handling Serv
11、icesSAE ARP*LhLbA 91 7943725 OOOLO9L L = SAE ARP1616 Revision A 3.3 Materlals: Materials and processes used by the manufacturer of fuel system components shall conform to appllcable Government and Industry Documents. Materlals . conforrnlng to contractors documents may be used, provided prior approv
12、al is obtained from the procurlng actlvlty. The use of contractors documents shall not constitute waiver of Government inspectlon, All materials used in the component shall be sufflclently resistant to llqulds shown In 3.8.3. 3,3,1 Selection of Materiais: Specifications and standards for all materia
13、ls, parts, and processes whlch are not speciflcally designated herein and whlch are necessary for the execution of this speclflcatlon shall be selected In accordance wl th MIL-STD-970. 3.3.2 Metals: All metals used in the constructton of fuel-system components that are not of a corroslon-reslstant t
14、ype shall be sultably protected to reslst corrosion durlng the normal servlce llfe of the component. Unless sultably protected against electrolytlc corrosion, disslmllar metals as deflned In MIL-STD-889 shall not be used in Intimate contact wlth each other, Magnesium shall not be used in fuel system
15、 components, Cadmium plate and copper shall not be used where In contact wlth fuel. 3,3,3 Castings: Classlflcation and Inspection of ferrous and non-ferrous metal castlngs shall be In accordance with MIL-STD-2175. If necessary to prevent leakage due to poroslty, parts shall be treated in accordance
16、with MIL-STD-276. 3,3,4 Forglngs: Forglngs shall be In accordance wlth QQ-A-367 or QQ-S-763. 3,3,5 Fungus-Proof Materlals: Materlals that are nutrlents for fungi shall not be used. 3*4 3,5 3,6 Flnlsh: Anodlzlng, plating, protective treatment, and painting of fuel system components shall be as speclf
17、led In the model specification and appllcable detal 1 drawl ngs. I dent 1 f I cat i on of Product : Equipment, assemblles, and parts shall be marked for identiflcatlon in accordance wl th MIL-STD-130. Col or I dent I f I cat I on : Each fuel system component shall be ldentlfied by a red color, In ap
18、proximate conformance wl th Federal Standard No, 595, color number 11 136, The color shall be permanent and, when applied to parts that may come In contact wlth fuel, shall not soften, chip, crack, or cause the fuel to be affected In any way. The entire component may be red anodized but not less tha
19、n 20% of the external surface area of the component shall be red. -4- COPYRIGHT SAE International (Society of Automotive Engineers, Inc)Licensed by Information Handling ServicesSAE ARPaLbLbA 91 7943725 OOOLO2 3 I SAE ARP1626 Revision A 3.7 Parts: 3.7.1 Standard Parts: Standard parts (MS, AN or NAS)
20、shall be used wherever they are suitable for the purpose and shall be identified on the drawing by their part number. Commercial utility parts; i.e., screws, bolts, nuts, and cotter pins, may be used, provided; (1) they possess suitable properties and are replaceable by the standard parts without al
21、teration, and (2) the corresponding standard number is referenced in the parts list and, if practicable, on the vendors drawing. In event there are not suitable corresponding standard parts in effect on date of invitation for bids, commercial parts may be used if they conform to all requirements of
22、thi s speci f i cation. 3.7.2 Threaded Parts: Threads shall be in accordance with MIL-S-8879 or MIL-S-7742. The use of pipe threads is prohibited. 3.7.3 Locking of Parts: All threaded parts shall be locked by safety wiring, self-locking nuts, cotter pins, or other methods approved by the procuring a
23、ctivity. Safety wiring shall be installed in accordance with MS33549 and shall conform to MS20995. Self-locking nuts shall be in accordance with MIL-N-25027 and MS33588. Lockwashers or staking are not permitted. Components installed within a fuel cell shall not have safety wire. 3.8 Design and Const
24、ruction: The valve frangible mechanisms shall be designed to meet all operational and service forces of the aircraft while being designed to separate at a predetermined point and load. Upon separation, internal self-sealing mechanisms in each valve section shall automatically close and seal, prevent
25、ing leakage of system fluids. The design shall consider visual indication of valve position and a means to prevent external leakage after separation due to foreign object contact with the sealing mechanisms. Provisions shall be designed into the valve to prevent fuel leakage in the event of a partia
26、l fracture of the frangible section before the valve closes. Spillage during separation and valve closure shall not exceed the values listed in Table 1, external power source or control is required for valve closure. The design of the valve shall be such that no -5- COPYRIGHT SAE International (Soci
27、ety of Automotive Engineers, Inc)Licensed by Information Handling ServicesSAE ARPrLblbA 91 m 7943725 OOOL093 5 m SAE ARP1616 Revision A TABLE 1 - Flow, Pressure Loss and Spillage Valve Size Flow Rate Press. Loss Q 75OF Spillage . Dla, Inches GPM psi Max cc 1 /2 10 4.0 3 3/ 4 1 1 1/4 1 1/2 2 2 1/2 3
28、20 50 80 I20 200 2 50 300 4.0 4.0 4.0 4.0 4.0 3.0 3.0 8 19 38 65 150 300 520 3.8J Valve Conflguration: The outside configuratlon of the valve, such as the method of mountlng, the types of fluid connectlons, and the permissible envelope, shall be prescrlbed by the procuring activity to meet the speci
29、fic needs of each fuel system. 3,8,2 Construction: The valves shall be constructed to withstand the strains, jars, vibratlons, and other conditions as specified in MIL-STD-1290 for crashworthy fuel system. The valves shall not require, except for initial preservation, special treatment or control le
30、d environment during storage. 3.8.3 Fluld Media: The valves shall be suitable for use with liquids conforming to specifications ASTM D 910; ASTM D 1655; MIL-T-5624; MIL-7-83133; MIL-C-7024 Type II ; and P-D-680 Type II. 3.8.4 Bondlng: Electrical contlnuity of 1 .O ohm maximum electrical resistance I
31、s required through the valve assemblies from one end to the other per MIL-6-5087 Type S. 3.9 Performance Characteri stics: 3.9.1 Rated Pressure Range: -5 to 60 psig or the maximum anticipated fuel system operating pressure, whl chever i s greater. The valve shall operate in the pressure range from 3
32、.9.2 Rated Temperature Range: The valve shall function in the fuel temperature range of -65 to t160F or the maximum anticipated fuel temperature, whlchever Is greater, and in an ambient temperature range required by MIL-F-8615, -6- COPYRIGHT SAE International (Society of Automotive Engineers, Inc)Li
33、censed by Information Handling ServicesSAE ARP*lbLbA 71 m 7743725 OOOL074 7 m SAE ARP1616 Revision A 3.9.3 Performance: The breakaway valves shall satisfy the following performance requirements when subjected to the applicable tests specified in Section 4 and In the procurlng activitys specification
34、. 3,9.3.1 Functional - Prior to Valve Separation: 3.9.3.1.1 Proof and Leakage: There shall be no external leakage when subjected to the proof and leakage tests of 4.6.2.2. 39.3.1.2 Negative Pressure Leakage: There shall be no measurable inward leakage when an Internal pressure of -5 psi Is applied f
35、or a period of 5 min as per 4.6.2.3. 3.9.3.1.3 Pressure Loss: The pressure loss shall meet the maximum shown in Table 1 unless otherwise specified by the procuring activity. The pressure drop shall be determined in accordance with ARP868 and shall not exceed the specifled pressure loss when subjecte
36、d to the test of 4.6,2.4, using JP5 or corrected to the specific gravity of JP5. 39.3.2 Functional - After Valve separation (Complete or Partial : 3.9.3.2.1 Proof and Leakage:. External leakage shall not exceed the specified amount when each separated valve section is subjected to the leakage test o
37、f 4.6.3. 3.9.3.3 3.9.3.4 3.9.3.5 3.9.3.6 3.93.7 3.9.3.8 3.9.3.9 Surge Flow: The valve shall not close nor shall there be any evidence of failure or loosenlng of parts followlng the surge flow test of 4.6.4. Fungus: The valve shall function properly and there shall be no evldence of deterioration fol
38、lowing the fungus test of 4.6.5. Corrosion Resistance: The valve shall function properly following the acce 1 erated corros i on test of 4.6.6 Contamlnated Fuel Endurance: Fol lowing the contamination fuel endurance test of 4.6.7, the valve shall satlsfactorlly pass the proof and external leakage te
39、st of 4.6.2.2. Fuel Resistance and Extreme Temperature: There shall be no external evi dence of fa1 1 Ure I corros 1 on, degradation i n performance, or self-seal ing capabi 1 ity when the valve is subjected to the appl icable test of 46.8. Vibration: The valve shall not close nor shall there be any
40、 evidence of structural fa1 lure, loosening of parts , leakage, or performance degradation either during or as a result of the vibration test of 4.6.9. Shock: The valves shall not close nor shall there be any evidence of structural failure during or followlng the shock test of 4.6.10. 3.9.3.10 Sand
41、and Dust: The valve shall function as specifled after being subjected to the sand and dust test of 4.6.11. COPYRIGHT SAE International (Society of Automotive Engineers, Inc)Licensed by Information Handling ServicesSAE ARP*LbLbA 91 E 7943725 OOOL095 9 SAE ARP1616 Revision A 3*9#3* 11 Dlsassembly and
42、Inspection: After completion of the qualification tests, dlsassembly and inspectlon shall reveal no indication of damage or excessive wear. (See 4.6J5.1 3,9.3J2 Burst Pressure: There shall be no external leakage or valve actuation 3.9J.13 Flre Test: The fire test, if required, shall be performed in
43、when the valve is subjected to the burst pressure test of 4.6.12. accordance wl th current standard practices and equipment as specified In AS1055 and by the procurlng actlvlty. 3,9,4 separation Criteria: 3,9*4.1 Separation Modes: The valve Qranglble mechanism shall separate and seal upon applicatio
44、n of a force of 25 to 5010 of the load required to fail the weakest component of the fuel system adjacent to the valve assembly, or at a level specified by the proquring activity, Separation modes may be In the form of tension, bending, shear or a combination thereof. Separatlon may be caused by sta
45、tic loads, 4.6.13 or dynamic loads, 4,6.14, Durlng Separation, spillage shall be withln the limits defined in 3.8. After separation each valve section shall meet the leakage requl rements of 4.6.3 e 3.1 O Mal n tal nab1 1 I ty : Interchangeabi 1 i ty: Al 1 parts having the same manufacturers part nu
46、mber shall be directly and completely interchangeable with each other with respect to Instal latlon and performance In accordance wl th Speciflcation MIL-1-8500, Changes In manufacturers part numbers shall be governed by the drawing number requirements of Specification MIL-T-31000. Repalrabillty: Th
47、e valve assembly shall be designed so that no adjustments, cleaning, or repairs are required during normal service life. Rep1 aceabi 1 1 ty : The val ve assembly rep1 acement shall not requi re special tools, facllitles, or highly skilled personnel. Serviceability: The valve assembly shall be so des
48、igned that, except for preservation procedures, scheduled malntenance wi 11 not be required in order to malntain physical or functional capabll ity. Servlce Life: Servlce life shall be 10 O00 flight hours or 10 calendar years, whichever comes first. manufacture to compl et i on of cal endar /f 1 i g
49、h t-hour sc hedu 1 e. Service life will be computed from date of -8- COPYRIGHT SAE International (Society of Automotive Engineers, Inc)Licensed by Information Handling ServicesSAE ARP*Lb1bA 95 7943725 0001096 O SAE ARP1616 Revision A 3.11 Safety: These valves are identified as a safety critica preclude al 1 human-error/material-fai lure modes item and the design shall which could result in these hazards : a. Inadvertent closure of the valves bo Inadvertent valve re-opening c. Leakage d. Failure to close when subjected to procuring activity 3.12 Drawings: crash impact Manuf
