1、MIL-DTL-26633E 17 January 2007 SUPERSEDING MIL-DTL-26633D 23 October 2003 DETAIL SPECIFICATION HOSE ASSEMBLY, NONCONDUCTIVE, POLYTETRAFLUOROETHYLENE, OXYGEN This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification cov
2、ers one type of hose assembly, nonconductive, polytetrafluoroethylene, oxygen having a nominal working pressure of 3,000 psig (206.84 bar) in the operating temperature range from -65F to +160F (-53.89C to 71.11C). 1.2 Part or Identifying Number (PIN). The definitive specification PIN will be formatt
3、ed to identify each item covered by this specification. The PIN format will consist of the letter M, specification number, length (in feet), and coupling guard (as required) as follows: M 26633 -XXXX X Example: M26633-9004A - 75 foot 1/2 inch lengComments, suggestions, or questions on this document
4、shoColumbus, Attn: DSCC-VAI, P.O. Box 3990, Columbus, OH 43Constructiondscc.dla.mil. Since contact information can this address information using the ASSIST Online databas)INCH-POUND AMSC N/A Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHSCoupling guard
5、(see 3.3.2.4) (Required add “A” - not required leave blankth hose assembly with coupling guard. uld be addressed to: Defense Supply Center, 218-3990, or emailed to change, you may want to verify the currency of e at http:/assist.daps.dla.mil. Specification number M prefix First 3 digits in inches, f
6、ourth digit in 1/8 fractions of an inchFSC 4720-,-,-MIL-DTL-26633E 2 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4, and 5 of this specification. This section does not include documents in other sections of this specification or recommended f
7、or 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 cited in sections 3, 4, and 5 of this specification, whether or not they are listed. 2.2 Government document
8、s. 2.2.1 Specifications, standards, and handbooks. The following specifications, 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. DEPARTMENT OF DEFENSE STAND
9、ARDS MIL-A-8625 - Anodic Coatings For Aluminum and Aluminum Alloys MIL-DTL-8789 - Fitting End, Attachable, Hydraulic, High Pressure (3,000 psi), General Specification for MIL-PRF-83282 - Hydraulic Fluid, Fire Resistant, Synthetic Hydrocarbon Base, Metric, NATO code Number H-537 MIL-PRF-87257 - Hydra
10、ulic Fluid, Fire Resistant; Low Temperature, Synthetic Hydrocarbon Base, Aircraft and Missile MS28760 - Fitting End, Attachable, Hydraulic and Pneumatic, High Pressure Hose (3,000 PSI) Flared Tube AN818 - Nut, Tube Coupling, Short (Copies of these documents are available online at http:/assist.daps.
11、dla.mil or http:/assist.daps.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 following documents form a part of this document to the extent specified herein. Unless otherwise spe
12、cified, the issues of these documents are those cited in the solicitation or contract. AEROSPACE INDUSTRIES ASSOCIATION (AIA) NAS 847 - Caps and Plugs, Protective, Dust and Moisture Seal (Copies of these documents are available from www.aia- or Aerospace Industries Association, 1000 Wilson Blvd., Su
13、ite 1700, Arlington, Virginia, 22209-3901.) ASTM INTERNATIONAL ASTM D792 - Plastics, Specific Gravity and Density of, By Displacement ASTM D2000 - Standard Classification System for Rubber Products in Automotive Applications SAE-J200 ASTM G93 - Standard Practice for Cleaning Methods and Cleanliness
14、Levels for Material and Equipment used in Oxygen-Enriched Environments (Copies of these documents are available from http:/www.astm.org/ or ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, Pennsylvania, USA 19428-2959.) Provided by IHSNot for ResaleNo reproduction or networ
15、king permitted without license from IHS-,-,-MIL-DTL-26633E 3 NCLS INTERNATIONAL NCLS Z540.1 - Calibration Laboratories and Measuring and Test Equipment (Copies of these documents are available online at http:/www.ncsli.org or from NCSL International, 2995 Wilderness Place, Suite 107 Boulder, Colorad
16、o 80301-5404) SAE INTERNATIONAL SAE-AMS2700 - Passivation of Corrosion Resistant Steels SAE-AS611 - Hose Assembly and Tubing, Polytetrafluoroethylene, Cleaning Methods for SAE-AS1339 - Hose Assembly, Polytetrafluoroethylene, Metallic Reinforced, 3000 psi, 400 Degrees Lightweight, Hydraulic and Pneum
17、atic SAE-AS2078 - Test Methods, Hose Assemblies, Polytetrafluoroethylene (PTFE) SAE-AS4395 - Fitting End, Flared Tube Connection, Design Standard SAE-ARP1153 - Method for Determining Relative Specific Gravity Polytetrafluoroethylene Tubing (Copies of these documents are available online at http:/www
18、.sae.org or from the SAE World Headquarters, 400 Commonwealth Drive, Warrendale, PA 15096-0001.) 2.4 Order of precedence. In 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, supersede
19、s applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Qualification. The hose assemblies furnished under this specification shall be products that are authorized by the qualifying activity for listing on the applicable qualified products list before con
20、tract award (see 4.4 and 6.3). 3.2 Materials. Materials shall be as specified herein and in referenced specifications and standards and other referenced documents. Materials not specified shall be selected by the contractor and shall be subject to all provisions of this specification. Materials shal
21、l be free of defects, which adversely affect performance of the finished product. 3.2.1 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible, provided that the material meets or exceed
22、s the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.2.2 Rubber goods. Rubber goods utilized, such as seals, covers, friction layers, etc. shall be fabricated from rubber components conforming to ASTM D2000. 3.2.3 Other materials. Materials not o
23、therwise specified shall conform to applicable specifications and to the requirements specified herein. All materials that are not specifically described shall be of the highest quality and suitable for the purpose intended. There shall be no presence of cadmium, titanium, magnesium, mercury, or ber
24、yllium (see 6.1.4). 3.2.4 Fungus proof materials. Materials that are nutrients for fungi shall not be used where it is practical to avoid them. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-26633E 4 3.3 Design and construction. The hose sha
25、ll be constructed to meet the requirements specified herein and to retain the end fittings without slipping or leaking when tested as specified. The hose assembly shall be designed for a 99.5 percent purity gaseous oxygen working pressure of 3,000 psig (206.84 bar) and a minimum hydrostatic burst pr
26、essure of 12,000 psig (827.37 bar). 3.3.1 Hose construction. The oxygen hoses in this specification shall be non-conductive. 3.3.1.1 Hose. The hose shall consist of a PTFE tube, reinforcement, and outer cover. 3.3.1.2 PTFE inner tube. The PTFE inner tube shall be a seamless, uniform gage extrusion o
27、f virgin polytetrafluoroethylene resin (PTFE). It shall be compounded and processed to permit the least amount of effusion of compressed gases consistent with the requirements specified herein. The PTFE inner tube shall have a smooth bore, shall be free from pitting and other defects, and shall be c
28、leaned to be free of dirt, foreign material, or mandrel lubricants. The tube shall be non-conductive and shall not contain carbon black. Carbon black can support combustion or explosion in an oxygen atmosphere; particularly in a “shock“ condition. 3.3.1.3 Reinforcement. The reinforcement shall consi
29、st of one or more spirally wrapped or braided (or combination thereof) plies of stainless steel wires. Reinforcement separation materials, if used, shall permit gas effusion from the PTFE inner tube to escape to the atmosphere. There shall be no broken or spliced reinforcing wires nor shall any wire
30、s be omitted in any length of hose. 3.3.1.4 Outer cover. A cover at least .029 inch (0.74 mm) thick shall be furnished on the outside of the hose. The cover shall consist of an abrasion, oil, and ozone-resistant chloroprene polymer or equivalent synthetic material compound to meet the requirements s
31、pecified herein. The cover need not be bonded to the outermost reinforcement ply, but shall not be free to slip or turn along the length of the hose. The cover shall permit gas that may effuse from the PTFE inner tube to escape to the atmosphere. 3.3.2 Dimensions and configuration. 3.3.2.1 Diameter.
32、 The inside and outside diameters of the hose shall be within the limits shown on figure 1. 3.3.2.2 Length. The hose assembly shall be furnished in lengths as specified by the procuring activity. The hose shall be measured as shown on figure 1. 3.3.2.3 End fittings. The end fittings shall conform to
33、 MS28760 (general configuration), and shall be made of stainless steel (socket material may be aluminum in accordance with MIL-DTL-8789), and shall mate with -5 fitting in accordance with SAE-AS4395. The swivel nut dimensions across flats shall conform to AN818 size -5. Provisions for wrenching by a
34、 hex or flats on the fitting body shall be optional. The nipple bore diameter shall conform to the limits shown on figure 1. The end fittings shall be designed for a working pressure of 3,000 psig (206.84 bar) and a minimum burst pressure of 16,000 psig (1103 bar). The end fittings shall be retained
35、 on the assembly without slipping or leaking when coupled to the hose and tested as specified. 3.3.2.3.1 Finish. 3.3.2.3.1.1 Corrosion resistant steel. Corrosion resistant steel shall be passivated in accordance with SAE-AMS2700. 3.3.2.3.1.2 Aluminum alloy. Anodic treatment, in accordance with MIL-A
36、-8625, type II. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-26633E 5 3.3.2.4 Coupling guard. When specified (see 6.2), a coupling guard shall be securely attached to each end of the hose assembly. The coupling guard shall protect the end
37、portions of the hose assembly as necessary to minimize hose failure due to bending at or near the coupling. 3.3.3 Lubricants. With the exception of clean water, lubricants shall not be used in the assembly of hose components unless such lubricants have been specifically approved by the qualifying ac
38、tivity (see 6.1.2 and 6.1.3). End fitting to mate with Hose dash size Nominal OD of rigid tube (ref) Hose ID minimum “A” Hose OD maximum “B” Coupling ID minimum “C” Hose minimum inside bend radius MS33656-5 -4 .250 (6.35 mm) .212 (5.38 mm) .703 (17.86 mm) .109 (2.77 mm) 3.250 (82.55 mm) NOTES: 1. Di
39、mensions are in inches. 2. Metric equivalents are given for information only. 3. Tolerances: Length L: L under 24 inches (61 cm) .125 (3.18 mm) L from 24 to 36 inches (61 to 91 cm) .250 (6.35 mm) L from 36 to 50 inches (91 to 127 cm) .500 (12.70 mm) L over 50 inches (127 cm) 1 percent FIGURE 1. Hose
40、 assembly details and length. 3.4 Performance. 3.4.1 Performance tests on PTFE inner tube. 3.4.1.1 Density and relative density. When tested in accordance with 4.8.2.1, the PTFE inner tube specific gravity shall not exceed 2.155 apparent and 2.210 relative. 3.4.1.2 Tensile and elongation. When teste
41、d In accordance with 4.8.2.2, the tensile strength shall be a minimum of 2200 psi (16.17 MPa) and the elongation shall be a minimum of 200%. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-26633E 6 3.4.1.3 Tube rolling. When tested In accorda
42、nce with 4.8.2.3, the PTFE inner tube shall meet the gap dimensions for rolling requirements in accordance with SAE-AS2078 for size 04. The PTFE inner tube shall not leak, split, burst, or show any evidence of failure. 3.4.1.4 Tube proof pressure. The tube without any reinforcing wires shall not lea
43、k, burst, or show any evidence of permanent deformation when tested in accordance with 4.8.2.4. 3.4.2 Hose and hose assembly. 3.4.3 Proof. When tested In accordance with 4.8.4, the hose assembly shall show no indication of leakage, distortion, or other defects. 3.4.4 Leakage. When tested In accordan
44、ce with 4.8.5, the hose assembly shall show no indication of pressure loss. The minimum room temperature burst pressure shall be 16,000 psig (827.37 bar). 3.4.5 Stress degradation. The air leakage rate, when tested in accordance with 4.8.6, from the hose and two end fittings when held at 3000 psig (
45、206.84 bar) after the stress degradation test shall not exceed 2.0cm3/in/min. 3.4.6 Elongation and contraction. When tested In accordance with 4.8.7, the hose assembly shall withstand 3,000 psig (206.84 bar) without a change in its free length greater than 2 percent. 3.4.7 Burst. Four hose assemblie
46、s shall be burst tested, 2 at room temperature (see 3.4.7.1) and 2 at high temperature (see 3.4.7.2). 3.4.7.1 Room temperature burst pressure test. When tested in accordance with 4.8.8, the hose assembly shall withstand 16,000 psig (1103.16 bar) minimum without bursting. 3.4.7.2 High temperature bur
47、st pressure test. When tested in accordance with 4.8.8, the hose assembly shall withstand 12,000 psig (413.69 bar) minimum without bursting. 3.4.8 Impulse. When tested in accordance with 4.8.9, using a minimum bend radius of 3.250 inch (82.55 mm), the hose assembly shall show no indication of cracki
48、ng, splitting, distortion, or leakage. 3.4.9 Tensile strength. The hose assembly when tested in accordance with 4.8.10 shall withstand a tensile pull of 1,000 pounds (453.59 kg). 3.4.10 Overtightening torque. The end fittings, specified in 3.3.2.3, when tested in accordance with 4.8.11 shall withsta
49、nd an overtightening torque of 315 pound-inches (35.59 N m). 3.5 Identification of the product. For hose lengths under 4 feet (1.22 m) each hose assembly shall be identified by a permanently attached snug-fitting aluminum or stainless steel band around the hose near the end fitting. Hose assemblies 4 feet (1.22 m) and greater in length, a band shall be attached near each end fitting of the assembly. The metal band shal
