MIL-STD-419 Cleaning, Protecting, And Testing Piping, Tubing, And Fittings For Hydraulic Power Transmission EquipmentThis standard covers the requirements governing the basic methods of cleaning and protecting nonferrous and ferrous metal and alloyed pipe, tubing, and fittings prior to installation and after hydraulic tests in hydraulic power transmission applications. This standard is applicable to hydraulic components used in systems filled with either petroleum oil, synthetic poly-alpha-olephin PAO fluid, phosphate ester type fluid, or water based fluid.

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MIL-STD-419E

6.2 Subject term (key word) listing. Hydrochloric acid

Hydrofluoric acid

Hydrostatic test

Long term (internal surfaces) Nitric acid

Pickling test

Short term (internal surfaces) Sodium dichromate

Sulfuric acid

System flushing

6.3 Changes from previous issue. Marginal notations are not used in this revision to identify changes with respect to the previous issue due to the extensiveness of the changes.