National Auto Parts - NAP Brake Hoses

A lot more to Brake Hoses than meets the eye!

SAE J1401 - This SAE standard specifies the performance tests and requirements for hydraulic brake hose assemblies used in the hydraulic braking system of a road vehicle. Our brake hoses exceed the SAE J1401 standard and meet the OE specification. Our hoses are supplied, where required, with brackets, grommets, moulded plastic guards, wire clips and protective sleeves.

National Auto Parts brake hoses are supplied under the category of “Spare parts of matching quality” As defined by the EEC Commission Regulation (EU) No 461/2010 issued on the 27th May 2010.

Markings: Each hydraulic brake hose has at least two clearly identifiable stripes of at least 1/16 of an inch in width, placed on opposite sides of the brake hose parallel to its longitudinal axis. These are called ‘torque stripes’. One stripe may be interrupted by the information printed on the hose. These are to prevent twisting during assembly and installation.

Burst Pressures: The hydraulic brake hose assembly must withstand water pressure of 4,000 psi for two minutes without rupture. Hoses 1/8 inch (3mm) or smaller in diameter must be tested at 7,000 psi.

Whip Testing: Brake hoses are continuously bent on a flexing machine for 35 hours at pressure.

Tensile Strength: A hydraulic brake hose assembly must withstand a pull of 325 pounds without separation of the hose from its end fittings during a slow pull test, and a pull of 370 pounds without separation of the hose from its end fittings during a fast pull test.

Cold Resistance: A brake hose is chilled to a temperature below minus 49º F for 70 hours, it then should not show cracks visible without magnification when bent around a cylinder.

Chemical Resistance: In order to test the hose’s chemical resistance to brake fluid, the hose is subjected to a temperature of 248 degrees Fahrenheit for 70 hours while filled with SAE ‘Compatibility Fluid’. After this, the hose is subjected to a 4,000 psi burst test.

Ozone Resistance: A brake hose assembly is exposed to ozone for 70 hours at 104° F. Any cracks seen at a specific magnification is ground for failure.

Fitting Corrosion Resistance: After 24 hours of exposure to salt spray, a hydraulic brake hose end fitting must show no base metal corrosion on the end fitting surface, except where crimping or the application of labelling information has caused displacement of the protective coating.

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