scope:

This specification covers the performance requirements of the tubing and tube assemblies, including coating thickness, corrosion resistance, dimensional tolerances, quality, and source approval. The control of the corrosion protective properties of the tubing is the responsibility of the manufacturer.

Restricted Chemical Substances

All product supplied to the requirements of this specification must comply with the requirements of the MPAPS B-50 specification.

APPLICATION

This specification covers three types of double wall, furnace brazed steel tubing, with corrosion resistant coatings, suitable for use in hydraulic brake lines or other applications where improved corrosion resistance is required. Type 1 tubing (hot dip terne coating overlaid with a zinc rich organic topcoat) is obsolete, and not to be used in Navistar products. Type 2 uses a hot dip zinc-aluminum coating overlaid with an aluminum rich organic (epoxy) topcoat. Type 3 tubing is Type 2 tubing with a nylon/polyamide covering.