SAE AS 1946B:2003 pdf – Hose Assembly, Polytetrafluoroethylene, Metallic Reinforced, Up to 1500 psi and 450 F, Hydraulic and Pneumatic

SAE AS 1946B:2003 pdf – Hose Assembly, Polytetrafluoroethylene, Metallic Reinforced, Up to 1500 psi and 450 F, Hydraulic and Pneumatic.
3.3.3.3 Fitting Finish:
3.3.3.3.1 Aluminum Parts: Unless otherwise specified, aluminum parts shall be finished in accordance with MIL-A-8625. Type Il, and dyed yellow on flareless parts and bkie on flared parts. The color fastness requirement of MIL-A-8625 does not apply.
3.3.3.3.2 Conosion-Resistant Steel Parts: Unless otherwise specifIed, corrosion-resistant steel parts shall be passivated in accordance with AMS-QQ-P-35.
3.3.3.3.3 Titanium Alloy Parts: Unless otherwise specified, titanium alloy fittings and nuts shall be fluoride phosphate coated per AMS 2486.
3.4 Inner Tube Requirements:
3,4.1 Specific Gravity: The specific gravity values of the hose inner tube shall not exceed 2.155 apparent and 2.210 relative when tested in accordance with AS2078.
3.4.2 Tensile Strength: When tested in accordance with AS2078, the longitudinal tensile strength for all sizes of tubes shall be 3000 psi minimum. The transverse tensile strength for sizes -10 and larger shall be 2500 psi minimum. For sizes under -10, the transverse strength need not be tested.
3.4.3 Elongation: When tested in accordance with AS2078, the elongation shall be a minimum of 200%.
3.4.4 Tube Roll: The tube shall not leak, split, burst, or show any evidence of malfunction, when tested through the sequence as specified in AS2078.
3.4.5 Tube Proof Pressure: Following tube roll test per 3.4.4, the tube, without reinforcing wires, shall not leak, burst, or show any evidence of malfunction when proof pressure tested as specified In
AS2078.
3.4.6 Electrical Conductivity: When tested in accordance with AS2078, the electrical current of the inner tube shall be equal to or greater than 10 pA for sizes -03 through -08, and equal to or greater than 20 pA for sizes -10 and over.
3.5 Hose. Dimensional and Physical Requirements:
3.5.1 Dimensions: The hose assembly dimensions, except for length, shall be as specified In Figure 1 and Table 1.
3.5.2 Physical Requirements: Hose assemblies shall meet the physical and weight requirements specified in Table 2.
3.5.3 Bore Check: When bent to the appcopriate minimum bend radius as specified In Table 2, the hose assembly shall permit the free passage of a solid rigid sphere throughout its length. The diameter of the sphere shall be as specified In Table 1 for the applicable end fitting type.
3.6 Screw Threads:
Coupling nut threads shall be in accordance with AS8879. Thread tolerance increase of 10% during assembly oi testing shall not be cause foc rejection of the hose assembly.
3.7 Length:
Tolerances on hose assembly lengths shall be as follows:
a. ±0,125 in for lengths under 18 In
b. ±0.250 in for lengths from 18 to 36 in exclusive
c. ±0.500 in foi lengths from 36 to 50 in exclusive
d. ±1% for lengths of 50 in and over
3.8 Part Numbering of Interchangeable Parts:
All parts complying with this standard and having the same manufacturer’s or standard part number shall be functionally and dimensionally interchangeable. The item identification and part number requirement of MIL-STD-100 shall govern the manufacturer’s part numbers and changes thereto.