Table 4-19. Operating, Proof, and Burst Test Pressures for AN6270 Hose Assembly using MIL-H-5593 Low
Hold proof test pressure for a minimum period of 60 seconds and a maximum of 5 minutes
Drycleaning solvent is flammable and solvent vapors are toxic. Use P-D-680, Type II Solvent in a well-
ventilated area. Keep away from open flames Avoid prolonged solvent contact with skin.
After proof test of a hose assembly using hydraulic fluid or oil as a test medium, flush or dip assembly
in kerosene, Federal Specification VV-K-211, or solvent Federal Specification P-D-680. Drain assembly and dry using
dry compressed air. Drain and dry with dry compressed air hose assemblies tested using water as pressure fluid.
Visually inspect instrument hose assemblies which were proof tested using a gas test fluid for evidence
of oil or hydraulic fluid on internal surfaces of hose assembly. Clean hoses showing evidence of this contamination as
specified in step (7).
Install following polyethylene protective plugs in end fittings of hose assemblies that are not to be
installed immediately after fabrication: NAS 815(*size) A (*same dash number as fitting). Close openings in flanges (or
other special fittings) using pressure sensitive tape or other adequate means to prevent entrance of foreign material.
Identification Tags for Field Fabricated Hose Assemblies. An identification tag must be affixed to each field
fabricated hose assembly.
Make tags from aluminum alloy 5052-0, Fed Spec QQ-A-250/8C, 0.020 Inch thick, 0.75 inch wide, with
the size of the band in accordance with figure 4-42. Mark tags to show data of pressure test, federal stock number or
part number, operating pressure, and depot or unit code or name.
Mark tags by Impression stamping, engraving, or etching.