1、 MIL-DTL-85052B INCH-POUND 30 March 2005 SUPERSEDING MIL-C-85052A 30 May 1984 DETAIL SPECIFICATION CLAMP, LOOP, CUSHION, GENERAL SPECIFICATION FOR This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification establishes t
2、he design and test requirements for clamp, loop, cushion, primarily intended for general clamping of tubing for aircraft hydraulic systems. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not include
3、 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, document users are cautioned that they must meet all specified requirements of documents cited in sections 3 an
4、d 4 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications and standards. The following specifications and standards form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited i
5、n the solicitation or contract. Comments, suggestions, or questions on this document should be addressed to the Commander, Naval Air Warfare Center Aircraft Division, Code 491000B120-3, Highway 547, Lakehurst, NJ 08733-5100 or emailed to thomas.omaranavy.mil. Since contact information can change, yo
6、u may want to verify the currency of this address information using the Assist Online database at http:/assist.daps.dla.mil. AMSC N/A FSC 5340 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-85052B DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-PRF
7、-5606 - Hydraulic Fluid, Petroleum Base; Aircraft, Missile and Ordnance. (Inactive for new design) MIL-DTL-5624 - Turbine Fue1, Aviation, Grades JP-4 and JP-5 MIL-PRF-7808 - Lubricating Oil, Aircraft Turbine Engine, Synthetic Base MIL-PRF-83282 - Hydraulic Fluid, Fire Resistant, Synthetic Hydrocarbo
8、n Base, Metric, NATO Code Number H-537 MIL-DTL-85052/1 - Clamp, Loop, Tube-17-7 PH CRES, 275 oF, Fuel and Petroleum Based Hydraulic Fluid Resistant MIL-DTL-85052/2 - Clamp, Loop, Tube-17-7 PH CRES, 275 oF, Phosphate Ester Fluid Resitant MIL-DTL-85052/3 - Clamp, Loop, Tube-17-7 PH CRES, 500 oF MIL-DT
9、L-85052/4 - Clamp Support - Loop, Clamp (Copies of these documents are available online at http:/assist.daps.dla.mil/quicksearch/ or http:/assist.daps.dla.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.2.2 Non-Government publicat
10、ions. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) INTERNATIONAL ASTM-A582 - Free-Machining Stainless a
11、nd Heat - Resisting Steel Bars. (DoD adopted) ASTM-D235 - Mineral Spirits (Petroleum Spirits) (Hydrocarbon Dry Cleaning Solvent). (DoD adopted) ASTM-D297 - Rubber Products - Chemical Analysis. (DoD adopted) ASTM-D395 - Rubber Property - Compression Set. (DoD adopted) ASTM-D412 - Vulcanized Rubber an
12、d Thermoplastic Elastomers Tension (DoD adopted) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-85052B ASTM-D471 - Rubber Property-Effect of Liquids. (DoD adopted) ASTM-D624 - Tear Strength of Conventional Vulcanized Rubber, and Thermoplas
13、tic Elastomers. (DoD adopted) ASTM-D1149 - Rubber Deterioration-Surface Ozone Cracking in a Chamber. (DoD adopted) ASTM-D2240 - Rubber Property - Durometer Hardness. (DoD adopted) ASTM-D3182 - Rubber-Materials, Equipment, and Procedures for Mixing Standard Compounds and Preparing Standard Vulcanized
14、 Sheets. (DoD adopted) ASTM-E18 - Rockwell Hardness and Rockwell Superficial Hardness of Metallic Materials. (DoD adopted) ASTM-G154 - Standard Practice for Operating Fluorescent Light Apparatus for UV Exposure of Nonmetallic Materials (Copies of these documents are available online at www.astm.org
15、or the American Society for Testing and Materials (ASTM) International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.) AMERICAN SOCIETY FOR QUALITY (ASQ) ANSI/ASQ-Z1.4 - Procedures, Sampling, and Tables for Inspection by Attributes. (DoD adopted) (Copies of this document are available onl
16、ine at www.asq.org or ASQ, P.O. Box 3005, 611 E. Wisconsin Ave, Milwaukee, WI 53201-4606.) SOCIETY OF AUTOMOTIVE ENGINEERS (SAE) SAE-AMS-QQ-P-35 - Passivation Treatments for Corrosion - Resistant Steel SAE-AMS4944 - Titanium Alloy Tubing, Seamless, Hydraulic 3Al - 2.5V, Cold Worked, Stress Relieved.
17、 (DoD adopted) SAE-AMS4945 - Titanium Alloy Tubing, Seamless, Hydraulic 3Al - 2.5V, Controlled Contractile Strain Ratio, Cold Worked, Stress Relieved SAE-AMS4946 - Titanium Alloy Tubing, Seamless, Hydraulic 3Al - 2.5V, Texture Controlled Cold Worked, Stress Relieved 3 Provided by IHSNot for ResaleNo
18、 reproduction or networking permitted without license from IHS-,-,-MIL-DTL-85052B SAE-AMS5528 - Steel, Corrosion Resistant, Sheet, Strip, and Plate, 17Cr-7.1Ni, 1.1Al, Solution Heat Treated, Precipitation Hardenable. (DoD adopted) SAE-AMS5529 - Steel, Corrosion Resistant, Sheet and Strip, 17Cr-7.1Ni
19、, 1.1Al, Solution Heat Treated and Cold Rolled, Precipitation Hardenable, 0.0015 to 0.050 Inch (0.038 to 1.27 mm) Nominal Thickness. (DoD adopted) SAE-AMS-H-6875 - Heat Treatment of Steel Raw Materials. (DoD adopted) SAE-ARP1527 - Color Coding - Elastomers for Tube Clamp Cushions (Copies of these do
20、cuments are available online at www.sae.org or the Society of Automotive Engineers, Inc., 400 Commonwealth Drive, Warrendale, PA 15096-0001.) 2.3 Order of precedence. In the event of a conflict between the text of this document and the references cited herein (except for related specification sheets
21、), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Specification sheets. The individual item requirements shall be as specified herein and in accordance with t
22、he applicable specification sheet. In the event of any conflict between the requirements of this specification and the specification sheet, the latter shall govern. 3.2 Qualification. The clamps furnished under this specification shall be products that are authorized by the qualifying activity for l
23、isting on the applicable qualified product list before contract award (see 4.2 and 6.5). 3.2.1 Qualification of molded and extruded cushions. If clamp cushions in sizes -5 and smaller are extruded, two separate cushion qualification procedures shall be completed; one for the extruded cushions and on
24、e for molded cushions which have wedges. 3.2.2 Qualification of the assembly. Qualification of clamps includes qualification of the clamp elastomeric cushion and metallic band. After receiving qualification approval, cushion material formulation and curing process shall not be changed or modified wi
25、thout the written approval of the qualifying activity. Clamp band processing shall not be changed after qualification is approved. If there are changes to the cushion material, the curing process or the cushion material supplier, including any change in their plant location, some cushion retests may
26、 be required, as directed by the qualifying activity. The qualification required by this specification applies to qualification of the clamp assembly only. It does not infer qualification of clamp installation techniques. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without
27、 license from IHS-,-,-MIL-DTL-85052B 3.3 Materials. Clamp band material and cushion material shall be as specified on the applicable specification sheet. 3.3.1 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to
28、 the maximum extent possible, provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.3.2 Hazardous substances and ozone depleting chemicals. The UV exposure and ozone resistance test (see 4.4.4.3) may conta
29、in hazardous chemicals. It shall be handled in accordance with Federal regulations and guidelines to perform those tests. For further information about toxic chemicals and hazardous materials list, consult the Environmental Protection Agency web database at www.epa.gov/ebtpages/pollutants.html. 3.4
30、Design and construction. The design and construction of the clamp shall be as specified herein and in accordance with the applicable specification sheet. 3.4.1 Dimensions and tolerances. Dimensions and tolerances shall be as specified on the applicable specification sheet. 3.5 Performance. Clamp cus
31、hions, clamp bands, and clamp assemblies shall conform to the requirements of this specification and the applicable specification sheet when subjected to the applicable tests specified in this specification and the applicable specification sheet. 3.5.1 Clamp cushion performance. 3.5.1.1 Physical pro
32、perties. The cushion material shall meet the physical property requirements specified in table II of the applicable specification sheet and 4.4.3.1 herein. 3.5.1.2 Compression set. The average compression set value of three cushion material specimens shall be not greater than the value specified in
33、the applicable specification sheet and 4.4.3.2 herein. 3.5.1.3 Flammability. The requirements shall be as specified in the applicable specification sheet. The cushion material shall be tested for flammability in accordance with the applicable specification sheet and 4.4.3.3 herein. 3.5.1.4 Titanium
34、compatibility. There shall be no evidence of cracking or pitting of the titanium tube specimen observed with a 5-10 power magnifying glass when the clamp assembly is tested in accordance with the titanium compatibility test as specified in 4.4.3.4. 3.5.1.5 Color coding. The cushion material shall be
35、 color coded in accordance with SAE-ARP1527 as specified on the applicable specification sheet. 3.5.2 Clamp band performance. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-85052B 3.5.2.1 Clamp band hardness. Clamp band hardness shall be 5
36、1-59 hardness reading (HR) Rockwell Superficial Scale, 30N, when tested in accordance with 4.3.3. 3.5.3 Clamp assembly performance. 3.5.3.1 Diametral retention. Each clamp sample as specified in 4.4.4.1 shall be tested in accordance with the diametral retention test both before and after being subje
37、cted to the vibration test (see 4.4.4.2.1). The clamp shall withstand an axial mandrel force as specified below: Clamp Band Thickness Axial Mandrel Force 0.020“ 15-45 lbs 0.032“ 25-55 lbs 0.040“ 35-65 lbs 3.5.3.2 Vibration and transmissibility. The clamps shall not exhibit any evidence of cushion se
38、paration or other deterioration when tested in accordance with 4.4.4.2. There shall be no cracking or separation of metal components. The Transmissibility Ratio shall be recorded (see 4.4.4.2.2). 3.5.3.3 Ozone resistance. When specified on the applicable specification sheet, the clamps shall not exh
39、ibit any evidence of cracking on the outside circumference of the cushion visible to the unaided eye when tested in accordance with 4.4.4.3. Cracks in cushion material pinched between the metal band feet shall not cause the test to be considered a failure. 3.5.3.4 Thermal shock. The clamps shall not
40、 exhibit evidence of cracking, tackiness, or degradation of the cushion material when tested in accordance with the thermal shock test (see 4.4.4.4). 3.6 Surface texture. All surfaces shall have a smooth finish and shall be free from burrs and sharp edges. The inside edges of the clamp band shall be
41、 rolled or provided with a radius to eliminate sharp edges. 3.7 Identification of product. 3.7.1 Identification of clamps. Clamps shall be marked as specified on the applicable specification sheet. 3.8 Workmanship. Workmanship shall be of a sufficiently high grade to ensure that clamps are of unifor
42、m quality and free from burrs, slivers, sharp edges, or other defects, which would affect their service and shall be uniform in appearance without any mold flash. 4 VERIFICATION 4.1 Classification of inspection. The inspection requirements specified herein are classified as follows: 6 Provided by IH
43、SNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-85052B a. Qualification inspection (see 4.2). b. Conformance inspection (see 4.3). 4.2 Qualification inspection. 4.2.1 Samples. Clamp samples of MIL-DTL-85052/1, MIL-DTL-85052/2, and MIL-DTL-85052/3 shall con
44、sist of 12 clamps of each size -2, -4, -6, -8, -10, -12, -16, -20, and -24, plus 20 additional size -16 clamps for each specification sheet. For the MIL-DTL-85052/1 clamp only, submit 20 additional size -2 clamps. Samples for qualification tests on cushion material shall consist of 20 slabs conformi
45、ng to ASTM-D3182 for each type of cushion material to be tested. Each slab shall identify with the specification sheet number and the direction of weave for fabric reinforced material. Both clamps and material test slabs shall be supplied for each specification sheet to be qualified in the quantitie
46、s as indicated herein. 4.2.2 Inspection routine. Sample units shall be subjected to the qualification inspection specified in table I in the order specified, conducted on applicable specimens. TABLE I. Qualification inspection. Clamp Cushion Examination or Test Requirement Paragraph Test Paragraph (
47、in sequence) Number of Samples Physical properties Compression set Flammability Titanium compatibility 3.5.1.1 3.5.1.2 3.5.1.3 3.5.1.4 4.4.3.1 4.4.3.2 4.4.3.3 4.4.3.4 (see 4.2.1) Clamp Assembly Examination or Test Requirement Paragraph Test Paragraph Number of Samples Examination of product Diametra
48、l retention Vibration and transmissibility Ozone resistance 1/ Thermal shock 3.4 3.5.3.1 3.5.3.2 3.5.3.3 3.5.3.4 4.4.2 4.4.4.1 4.4.4.2 4.4.4.3 4.4.4.4 58 48 48 15 (see 4.2.1) 5 (see 4.2.1) 1/ When specified on applicable specification sheet. 4.2.3 Identification of samples. Samples for each dash num
49、ber shall be separately packaged and forwarded to the testing facility directed by the qualifying agency (see 6.5). Samples shall be clearly identified by securely attached durable tags marked with the following information: 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-85052B Sample for qualification test Specification MIL-DTL-85052 Clamp, Loop, Cushion Specificati
