1、MIL-DTL-32435 23 January 2013 DETAIL SPECIFICATION HOSE, POLYTETRAFLUOROETHYLENE, CONVOLUTED, 450F, MEDIUM PRESSURE This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the requirements for a medium pressur
2、e, high temperature, convoluted polytetrafluoroethylene (PTFE) hose reinforced with corrosion-resistant (CRES) steel wire (see 3.4.2). 1.2 Part or Identifying Number (PIN). The hose PIN consists of the letter M, the basic specification number, a dash, hose size in dash number, a “Z” for double braid
3、” and no code for “single braid, a dash, hose length, a dash, and hose length tolerance in 1/8thfraction of an inch or the letter B or S for bulk hose. M 32435 - 16Z - 096 - 6 PIN examples: M32435-08-014-5 (1/2 inch single braided PTFE convoluted hose, 14 5/8 inches long). M32435-16Z-050-B (1 inch d
4、ouble braided PTFE convoluted hose, 50 feet bulk length). M32435-04-025-S (1/4 inch single braided PTFE convoluted hose, 25 feet specific length). 1.2.1 Hose lengths. 1.2.1.1 Lengths of hose. Lengths of hose are represented by inches and 1/8 of an inch unless bulk hose or specific length of hose is
5、required which are given in feet, (see 1.2.2). AMSC N/A FSC 4720 Comments, suggestions, or questions on this document should be addressed to: DLA Land and Maritime, Attn: DSCC-VAI, P.O. Box 3990, Columbus, OH 43218-3990, or emailed to FluidFlowdla.mil. Since contact information can change, you may w
6、ant to verify the currency of this address information using the ASSIST Online database at https:/assist.dla.mil. INCH-POUND Specification number Hose size (see table I) Length in inches or feet (see 1.2.1.1 or 1.2.2) M prefix Fractional lengths in 1/8 inch increments (0 thru 7) (see 1.2.1.2) or B o
7、r S for bulk lengths (see 1.2.2) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32435 2 1.2.1.2 Fractions. Fractions are expressed in 1/8 inch increments (0 thru 7). Not applicable to bulk or specific hose lengths. 1.2.2 Bulk hose lengths. B
8、ulk hose lengths are represented by the letter B or S. Bulk lengths are in increments specified in table I. The S designator is used to define specific lengths in feet (see 3.4.5.1). TABLE I. Hose lengths per full order of bulk hose. Dash sizes Maximum percentage of lengths ranging from 3 to 14 ft 1
9、/ Minimum percentage of lengths above 14 ft -4 through -8 35 65 -10 through -16Z 45 55 -20Z through -24Z 60 40 1/ Hoses of 3-foot lengths should not be more than 5% of the full order. Note: For the inch designator insert the number zero in front of designator for lengths less than 100 inches (2540 m
10、m). Examples: When 12 7/8 inch length is required the designator is: 012-7 When 96 inches is required the designator is: 096-0 When 90 feet total length is required the designator is: 090-B When 30 feet continuous length is required with a 1% tolerance the designator is: 030-S 2. APPLICABLE DOCUMENT
11、S 2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure t
12、he completeness of this list, document users are cautioned that they must meet all specified requirements documents cited in sections 3, 4, or 5, of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specificati
13、ons, standards, and handbooks 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. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-
14、DTL-32435 3 DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-DTL-32434 - Hose Assembly, Polytetrafluoroethylene, Convoluted, High Temperature, Medium Pressure, General Specification for MIL-DTL-32434/6 - Hose Assembly, Polytetrafluoroethylene Convoluted, Permanently Attached Fittings, High Temperature, Medi
15、um Pressure, Flare-To-Flare MIL-DTL-32434/7 - Hose Assembly, Polytetrafluoroethylene Convoluted, Permanently Attached Fittings, High Temperature, Medium Pressure, Flareless-To-Flareless MIL-DTL-32434/8 - Hose Assembly, Polytetrafluoroethylene Convoluted, Permanently Attached Fittings, High Temperatu
16、re, Medium Pressure, Flare-To-Flange MIL-DTL-32434/9 - Hose Assembly, Polytetrafluoroethylene Convoluted, Permanently Attached Fittings, High Temperature, Medium Pressure, Flareless-To-Flange MIL-DTL-32434/10 - Hose Assembly, Polytetrafluoroethylene Convoluted, Permanently Attached Fittings, High Te
17、mperature, Medium Pressure, Flange-To-Flange MIL-DTL-27272 - Fittings, Polytetrafluoroethylene Hose, High Temperature, Medium Pressure, General Specification for MIL-PRF-680 - Degreasing Solvent MIL-PRF-5606 - Hydraulic Fluid, Petroleum Base; Aircraft, Missile and Ordnance MIL-PRF-7808 - Lubricating
18、 Oil, Aircraft Turbine Engine, Synthetic Base MIL-PRF-83282 - Hydraulic Fluid, Fire Resistant, Synthetic Hydrocarbon Base, Metric, NATO Code Number H-537 MIL-PRF-87257 - Hydraulic Fluid, Fire Resistant; Low Temperature, Synthetic Hydrocarbon Base, Aircraft and Missile DEPARTMENT OF DEFENSE STANDARD
19、MIL-STD-130 - Identification Marking of U.S. Military Property (Copies of these documents are available online at https:/assist.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.3 Non-Government publications. The fo
20、llowing 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. ASTM INTERNATIONAL ASTM D471 - Standard Test Method for Rubber Property - Effect of Liquids ASTM D792 - Density an
21、d Specific Gravity (Relative Density) of Plastics by Displacement ASTM D4895 - Polytetrafluoroethylene (PTFE) Resin Produced from Dispersion (Copies of these documents are available online at http:/www.astm.org or from ASTM International, P.O. Box C700, 100 Barr Harbor Drive, West Conshohocken, PA 1
22、9428-2959.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32435 4 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION (ISO) ISO 17025 - General requirements for the competence of testing and calibration laboratories (Copies of these documents ar
23、e available online at www.ansi.org or from the ANSI Customer Service Department, 25 W. 43rdStreet, 4thFloor, New York, NY 10036.) NCSL INTERNATIONAL NCSL Z540.3 - Requirements for the Calibration of Measuring and Test Equipment (Copies of these documents are available online at http:/www.ncsli.org o
24、r from NCSL International 2995 Wilderness Place, Suite 107 Boulder, Colorado 80301-5404) SAE INTERNATIONAL SAE-ARP1153 - Determining Relative Specific Gravity Polytetrafluoroethylene Tubing, Method for SAE-AS2078 - Test Methods, Hose Assemblies, Polytetrafluoroethylene (PTFE) (Copies of these docume
25、nts are available online at www.sae.org from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, and Tel: 877-606-7323 inside USA and Canada or 724-776-4970 outside USA, email at CustomerServicesae.org.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in
26、the event of a conflict between the text of this document and the references cited herein, 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 First article. When
27、specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.5. 3.2 Components. The hose shall consist of a convoluted conductive PTFE tube reinforced with a corrosion resistant steel (CRES) wire braiding. 3.3 Materials. Materials shall conform to the requirement
28、s specified herein. Materials which are not covered by specifications, or which are not specifically described herein, shall be of the quality appropriate for the purpose intended (see 6.1). 3.3.1 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally p
29、referable materials should be used to the maximum extent possible, provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.4 Design and construction. 3.4.1 Helical (right hand) convoluted inner tube. The tub
30、e shall be a seamless, uniformly convoluted virgin PTFE resin, see figure 1. The base resin shall conform to ASTM D4895 except for the specific gravity requirement (see 3.5.2.4). Additives may be included in the compound from which the tube is extruded. Provided by IHSNot for ResaleNo reproduction o
31、r networking permitted without license from IHS-,-,-MIL-DTL-32435 5 FIGURE 1. Helical (right hand) convolutedluted tube. 3.4.2 Reinforcement. The reinforcement of the hose shall be braided CRES wires, see figure 2. Hoses under size 16Z shall have a single layer of braiding while size 16Z and above s
32、hall have two layers of braiding. The letter “Z” is used to indicate that two layers of wire braiding are required. The arrangement of the wires over the tube shall provide sufficient strength to ensure conformance to the requirements specified herein. Hoses with crossed-over reinforcing wires shall
33、 not be cause for rejection; however, hoses with broken or missing reinforcing wires shall not be accepted. FIGURE 2. Single braided reinforcement over convoluted tube. 3.4.3 Hose end fittings. Hose shall be compatible with reusable fittings qualified in accordance with MIL-DTL-27272 and permanent f
34、ittings in accordance with MIL-DTL-32434/6 through MIL-DTL-32434/10, as applicable. 3.4.4 Dimensions. The cross section of the hose shall meet the applicable requirements specified in table II. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-
35、32435 6 TABLE II. Hose dimensional requirements. 1 2/ Dash size Inside diameter Inch (mm) Tube wall thickness Inch (mm) Over-braid outside diameter Inch (mm) -4 .188 (4.78) .015 (0.38) .040 (1.02) +.007 (0.18) -.005 (0.13) .312 (7.92) + .031 (0.79 - .008 (0.20) -5 .250 (6.35) .040 (1.02) .375 (9.53)
36、 + .031 (0.79) - .008 (0.20) -6 .313 (7.95) .040 (1.02) .446 (11.33) + .023 (0.58) - .016 (0.41) -8 .406 (10.31) .043 (1.09) .562 (14.27) + .023 (0.58) - .016 (0.41) -10 .500 (12.70) .047 (1.19) .656 (16.66) + .031 (0.79) - .015 (0.38) -12 .625 (15.88) +.020 (0.51) -.010 (0.25) .047 (1.19) .789 (20.
37、04) .023 (0.58) -16Z 3/ .875 (22.23) + .031 (0.79) -.024 (0.61) .047 (1.19) 1.109 (28.17) .031 (0.79) -20Z 3/ 1.125 (28.58) + .031 (0.79) .024 (0.61) .050 (1.27) 1.359 (34.52) .031 (0.79) -24Z 3/ 1.375 (34.93) .031 (0.79) .070 (1.78) 1.672 (42.47) .031 (0.79) 1/ Dimensions are in inches. 2/ Metric e
38、quivalents are given for information only. 3/ The letter “Z” is used to indicate that two layers of braiding are required for reinforcement of these sizes (see 3.4.2). 3.4.5 Length of bulk hose. 3.4.5.1 S designator for specific bulk hose lengths. When the order is for a specific length in feet, a t
39、olerance of 1% of the required length shall be used. 3.5 Performance. 3.5.1 Operating temperature and pressure. The hose shall operate in the temperature range of -65F to 450F (-54C to 232C) when assembled into class 1 hose assemblies in accordance with MIL-DTL-32434. The maximum operating pressures
40、 shall be as specified in table III. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32435 7 TABLE III. Performance requirements and hose assembly test sample lengths. 1/ 2/ Dash size Length of samples for impulse test inch (mm) 3/ Length of
41、samples for all other tests inch (mm) 3/ Operating pressure psi (MPa) Proof pressure psi (MPa) Room temperature burst pressure psi (MPa) High temperature burst pressure psi (MPa) Minimum inside bend radius inch (mm) -4 14.0 (355.60) 18.0 (457.20) 1500 (10) 3000 (20.7) 12000 (83) 7000 (48) 2.00 (50.8
42、) -5 16.0 (406.40) 18.0 (457.20) 1500 (10) 3000 (20.7) 10000 (69) 6500 (45) 2.00 (50.8) -6 18.0 (457.20) 18.0 (457.20) 1500 (10) 3000 (20.7) 9000 (62) 6500 (45) 4.00 (101.6) -8 21.0 (533.40) 18.0 (457.20) 1500 (10) 3000 (20.7) 8000 (55) 6000 (41.4) 4.63 (117.6) -10 23.5 (596.90) 18.0 (457.20) 1500 (
43、10) 3000 (20.7) 7000 (48) 5500 (38) 5.50 (139.7) -12 27.5 (698.50) 18.0 (457.20) 1000 (7) 2000 (13.8) 5000 (34.5) 3500 (24) 6.50 (165.1) -16Z 18.0 (457.20) 18.0 (457.20) 4/ 1250 (8.6) 2500 (17.2) 5000 (34.5) 3500 (24) 7.38 (187.5) -20Z 18.0 (457.20) 18.0 (457.20) 4/ 1000 (6.9) 2000 (13.8) 4000 (27.6
44、) 3000 (20.7) 11.00 (279.4) -24Z 18.0 (457.20) 18.0 (457.20) 4/ 1000 (6.9) 2000 (13.8) 4000 (27.6) 3000 (20.7) 14.00 (355.6) 1/ Dimensions are in inches. 2/ Metric equivalents are given for information only. 3/ The number of samples required for first article testing is specified in 4.5.1 and in tab
45、le VIII. 4/ Samples for the low temperature flexibility and the vacuum tests shall be 30 inches (762 mm) long for these sizes. 3.5.2 Tube. The extruded PTFE tube shall meet the following requirements. 3.5.2.1 Tube roll and tube proof pressure. The tube shall not leak, split, burst, or show any evide
46、nce of malfunctioning when tested in accordance with 4.7.2.1. 3.5.2.2 Tensile strength. When tested in accordance with 4.7.2.2, the longitudinal tensile strength for all sizes of tubes shall not be less than 3,000 psi (20.7 MPa). The transverse tensile strength for sizes 10 and larger shall be not l
47、ess than 2,500 psi (17.2 MPa). For sizes under 10, the transverse tensile strength need not be tested. 3.5.2.3 Elongation. The elongation of the tube shall not be less than 200% when tested in accordance with 4.7.2.2. 3.5.2.4 Specific gravity. When tested in accordance with 4.7.2.3, the apparent spe
48、cific gravity of the tube shall be not greater than 2.155 and its relative specific gravity shall be not greater than 2.210 for all sizes of tubes. 3.5.2.5 Tube conductivity. When tested in accordance with 4.7.2.4, tube sizes 4 through 8 shall conduct a direct current of not less than 10 A. Tube siz
49、es 10 through 24Z shall conduct a direct current of not less than 20 A. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32435 8 3.5.3 Hose and hose assembly. The hose (braid reinforced PTFE tube) or the hose assembly, consisting of the hose assembled with end fittings (see 3.4.3), shall meet the following req
