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

CONTENTS

PARAGRAPH                                                                                                                                                        PAGE

1.  SCOPE......................................................................................................................................................................1

1.1  Scope.................................................................................................................................................................1

1.2  Applicability .....................................................................................................................................................1

2.  APPLICABLE DOCUMENTS ................................................................................................................................1

2.1  General..............................................................................................................................................................1

2.2  Government documents ....................................................................................................................................1

2.2.1  Specifications, standards, and handbooks ................................................................................................1

2.3  Non-Government publications..........................................................................................................................2

2.4  Order of precedence..........................................................................................................................................3

3.  DEFINITIONS .........................................................................................................................................................3

3.1  Flushing ............................................................................................................................................................3

3.2  Outflushing .......................................................................................................................................................3

3.3  Pickling .............................................................................................................................................................3

4.  GENERAL REQUIREMENTS................................................................................................................................3

4.1  Recycled, recovered, or environmentally preferable materials.........................................................................3

4.2  Cleanliness........................................................................................................................................................3

4.3  Pipe construction and cleaning .........................................................................................................................3

4.4  Abrasive blasting ..............................................................................................................................................3

4.5  Sand packing.....................................................................................................................................................3

4.6  Wire brushing ...................................................................................................................................................3

4.7  Cloth and paper.................................................................................................................................................3

4.8  Corrosion protection .........................................................................................................................................3

4.9  Capping.............................................................................................................................................................4

4.10  Heat treated piping and tubing ........................................................................................................................4

5.  DETAILED REQUIREMENTS...............................................................................................................................4

5.1  Safety precautions.............................................................................................................................................4

5.2  Cleaning............................................................................................................................................................4

5.2.1  Compressed air cleaning plugs.................................................................................................................4

5.3  Pickling and hydrostatic tests (prior to installation) .........................................................................................5

5.3.1  Nonferrous pipe, tubing, and fittings (bronze, copper, copper-nickel, and nickel-copper, not aluminum or aluminum alloys) ...........................................................................................................................................5

5.3.1.1  Nonferrous metals other than nickel-copper....................................................................................5

5.3.1.2  Nickel-copper ..................................................................................................................................5

5.3.1.3  Treatment following pickling ..........................................................................................................5

5.3.1.4  Hydrostatic test prior to installation ................................................................................................5

5.3.2  Ferrous pipe, tubing, and fittings (other than corrosion-resistant steel) ...................................................6

5.3.2.1  Treatment following pickling ..........................................................................................................6

5.3.2.2  Hydrostatic test prior to installation ................................................................................................6

5.3.3  Corrosion-resistant steel pipe, tubing, and fittings...................................................................................6

5.3.3.1  Hydrostatic test prior to installation ................................................................................................6

5.4  Flush of installed system for removal of brazing fluxes ...................................................................................6

5.4.1  Requirements for final fit-up joints using minimum flux brazing procedure...........................................7

5.5  Hydrostatic test after installation ......................................................................................................................7

5.5.1 Hydraulic system/component preservation. ..............................................................................................7

5.5.1.1  Assembled systems..........................................................................................................................7

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