1、 INCH-POUND MIL-STD-419E 26 April 2010 SUPERSEDING MIL-STD-419D 13 July 1987 DEPARTMENT OF DEFENSE STANDARD PRACTICE CLEANING, PROTECTING, AND TESTING PIPING, TUBING, AND FITTINGS FOR HYDRAULIC POWER TRANSMISSION EQUIPMENT AMSC N/A FSC 4730 Provided by IHSNot for ResaleNo reproduction or networking
2、permitted without license from IHS-,-,-MIL-STD-419E FOREWORD 1. This standard is approved for use by all Departments and Agencies of the Department of Defense. 2. Comments, suggestions, or questions on this document should be addressed to: Commander, Naval Sea Systems Command, ATTN: SEA 05S 1333 Isa
3、ac Hull Avenue, SE, Stop 5160, Washington Navy Yard DC 20376-5160 or emailed to CommandStandardsnavy.mil, with the subject line “Document Comment”. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at https:/assist.
4、daps.dla.mil. ii Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-419E CONTENTS PARAGRAPH PAGE 1. SCOPE1 1.1 Scope.1 1.2 Applicability .1 2. APPLICABLE DOCUMENTS 1 2.1 General1 2.2 Government documents 1 2.2.1 Specifications, standards, and ha
5、ndbooks 1 2.3 Non-Government publications2 2.4 Order of precedence3 3. DEFINITIONS .3 3.1 Flushing 3 3.2 Outflushing .3 3.3 Pickling .3 4. GENERAL REQUIREMENTS3 4.1 Recycled, recovered, or environmentally preferable materials.3 4.2 Cleanliness3 4.3 Pipe construction and cleaning .3 4.4 Abrasive blas
6、ting 34.5 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 tubing4 5. DETAILED REQUIREMENTS.4 5.1 Safety precautions.4 5.2 Cleaning4 5.2.1 Compressed air cleaning plugs.4 5.3 Pickling and hydrostatic tests (prior to inst
7、allation) .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-copper5 5.3.1.2 Nickel-copper 5 5.3.1.3 Treatment following pickling 5 5.3.1.4 Hydrostatic test prior to install
8、ation 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 o
9、f 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 systems7 iii Provided by IHSNot for ResaleNo reproduction
10、 or networking permitted without license from IHS-,-,-MIL-STD-419E iv 5.5.1.2 Components.7 5.5.1.2.1 Short term (internal surfaces) .7 5.5.1.2.2 Long term (internal surfaces) .8 5.5.1.2.3 External surfaces.8 5.5.1.3 Preservative removal .8 5.6 System flushing.8 5.6.1 Procedure for system operating f
11、luid flush 11 5.6.1.1 Minimum flushing time.11 5.6.2 Flushing fluid samples .11 5.6.2.1 Sample analyses.12 5.7 Capping and sealing open ends.12 5.7.1 Petroleum or PAO based hydraulic fluid caps12 5.7.2 Phosphate ester based hydraulic fluid caps. .12 5.8 Ferrous systems (except corrosion-resistant st
12、eel) .12 5.9 Disposal of waste materials used in cleaning12 6. NOTES .12 6.1 Acquisition requirements 12 6.2 Subject term (key word) listing.13 6.3 Changes from previous issue 13 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-419E 1. SCOPE 1
13、.1 Scope. This 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 hydr
14、aulic components used in systems filled with either petroleum oil, synthetic poly-alpha-olephin (PAO) fluid, phosphate ester type fluid, or water based fluid. 1.2 Applicability. The procedures described in this standard are intended for the use of shipyard or contractor personnel only in accordance
15、with the safety precautions of section 5. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this standard. This section does not include documents cited in other sections of this standard or recommended for additional information or as
16、examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this standard, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications,
17、standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. FEDERAL SPECIFICATIONS O-H-795 - Hydrofluoric Acid,
18、 Technical O-S-642 - Sodium Phosphate, Tribasic, Anhydrous; Dodecayhdrate; and Monohydrate; Technical COMMERICAL ITEM DESCRIPTIONS A-A-55828 - Sulfuric Acid, Technical A-A-59105 - Nitric Acid, Technical A-A-59123 - Sodium Dichromate, Dihydrate, Technical A-A-59563 - Sodium Carbonate, Anhydrous, Tech
19、nical DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-PRF-680 - Degreasing Solvent MIL-PRF-6083 - Hydraulic Fluid, Petroleum Base, for Preservation and Operation MIL-PRF-16173 - Corrosion Preventive Compound, Solvent Cutback, Cold-Application MIL-DTL-16232 - Phosphate Coating, Heavy, Manganese or Zinc Base
20、 MIL-D-16791 - Detergents, General Purpose (Liquid, Nonionic) MIL-PRF-17331 - Lubricating Oil, Steam Turbine and Gear, Moderate Service MIL-PRF-17672 - Hydraulic Fluid, Petroleum, Inhibited MIL-H-19457 - Hydraulic Fluid, Fire-Resistant, Non-Neurotoxic MIL-H-22072 - Hydraulic Fluid, Catapult, NATO Co
21、de Number H-579 MIL-I-22110 - Inhibitors, Corrosion, Volatile, Crystalline Powder 1 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-419E MIL-F-24402 - Filters (Hydraulic), Filter Elements (High Efficiency), and Filter Differential Pressure In
22、dicators, General Specification for DEPARTMENT OF DEFENSE STANDARDS MIL-STD-2073-1 - Standard Practice for Military Packaging DEPARTMENT OF DEFENSE HANDBOOKS MIL-HDBK-407 - Contamination Control Technology Precision Cleaning Methods and Procedures (Copies of these documents are available online at h
23、ttps:/assist.daps.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the
24、 issues of these documents are those cited in the solicitation or contract. ASTM INTERNATIONAL ASTM D6304 - Standard Test Method for Determination of Water in Petroleum Products, Lubricating Oils, and Additives by Coulometric Karl Fischer Titration ASTM E1146 - Standard Specification for Muriatic Ac
25、id (Technical Grade Hydrochloric Acid) (Copies of these documents are available from ASTM International, 100 Barr Harbor Dr., P.O. Box C700, West Conshohocken, PA 19428-2959 or online at www.astm.org) INTERNATIONAL ORGANIZATION FOR STANDARDIZATION (ISO) ISO 4406 - Hydraulic Fluid Power Fluids Method
26、 for Coding the Level of Contamination by Solid Particles ISO 11171 - Hydraulic Fluid Power - Calibration of Automatic Particle Counters for Liquids ISO 23309 - Hydraulic Fluid Power Systems Assembled Systems Methods of Cleaning Lines by Flushing (Copies of these documents are available from ISO, 1,
27、 ch. de la Voie-Creuse, Case postale 56 CH-1211 Geneva 20, Switzerland or online at www.iso.org) NATIONAL AEROSPACE STANDARD (NAS) NAS 847 - Caps and Plugs, Protective, Dust and Moisture Seal (Copies of this document are available from Aerospace Industries Association, 1000 Wilson Boulevard, Suite 1
28、700, Arlington, VA 22209-3901 or online at www.aia-aerospace.org.) SAE INTERNATIONAL SAE-AS4059 - Aerospace Fluid Power Cleanliness Classification for Hydraulic Fluids SAE-ARP-598 - Aerospace Microscopic Sizing and Counting of Particulate Contamination for Fluid Power Systems 2 Provided by IHSNot fo
29、r ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-419E SAE J2321 - Ship Systems and Equipment General Specification for Filter Elements-Hydraulic and Lube Oil Service (Copies of these documents are available from SAE World Headquarters, 400 Commonwealth Drive, Warr
30、endale, PA 15096-0001 or online at www.sae.org.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, sup
31、ersedes applicable laws and regulations unless a specific exemption has been obtained. 3. DEFINITIONS 3.1 Flushing. The process of cleaning a hydraulic piping system that involves the circulation of turbulent flushing fluid within piping system loops to remove, transport and filter out particles and
32、 other contaminants that may have been introduced into the system during manufacture, construction and/or maintenance. 3.2 Outflushing. Unrestricted discharge of sufficient fluid volume to an open container or bucket to remove contamination from a dead end in the piping. 3.3 Pickling. A treatment of
33、 metallic surfaces in order to remove impurities, stains, rust, or scale with a solution called pickle liquor, containing strong mineral acids, before subsequent processing, such as extrusion, rolling, painting, galvanizing or plating. 4. GENERAL REQUIREMENTS 4.1 Recycled, recovered, or environmenta
34、lly preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 4.2 Cleanliness. Pi
35、pe tubing and fittings related to the hydraulic power transmission equipment shall be thoroughly cleaned and pickled as necessary prior to installation (see 5.2 and 5.3). They shall be free from scale and foreign matter which could be detrimental to operation of hydraulic equipment such as pumps, mo
36、tors, valves, rams, and accumulators. 4.3 Pipe construction and cleaning. Pipe required to complete a hydraulic installation shall be constructed in a shop where adequate facilities exist. However, shipboard or vehicle construction is allowed, provided adequate provisions exist to allow cleanliness
37、controls and preclude damage to equipment. Subassemblies shall be used to the maximum extent practicable. After construction and bending operations are completed, the constructed and bent pipe, tubing, and fittings shall be cleaned and pickled in accordance with the procedures specified herein (see
38、5.2). Hydraulic components which may be constructed of materials not compatible with the pickling solution shall not be immersed in the cleaning or pickling baths. Complex components, such as pumps, valves, and rams, which may be compatible with the pickling solution but will require disassembly to
39、remove residual fluids, shall not be immersed in the cleaning or pickling baths. No hydraulic component that is mechanically connected (union, flange) to rigid piping shall be subject to the pickling solution. 4.4 Abrasive blasting. Sand, shot, or other abrasive blasting shall not be permitted on an
40、y part of the hydraulic system. Unless a separate isolated room is provided in the shop for construction of hydraulic piping, abrasive blasting shall be prohibited in the same building in which an open hydraulic component is housed. Abrasive blasting, chipping, or grinding shall not be permitted in
41、the vicinity of an installation site for an open hydraulic system. 4.5 Sand packing. Hydraulic pipe or tubing shall not be packed with sand during the bending process. 4.6 Wire brushing. The pipe and tubing shall not be wire brushed after pickling. 4.7 Cloth and paper. Cloth or paper material shall
42、not be used in drying operations, nor for capping open ends (see 5.7). 4.8 Corrosion protection. The interior and exterior of the ferrous pipe, tubing, and fittings (except corrosion-resistant steel) shall be treated as specified in 5.5 to prevent corrosion. 3 Provided by IHSNot for ResaleNo reprodu
43、ction or networking permitted without license from IHS-,-,-MIL-STD-419E 4.9 Capping. Openings shall be capped and sealed air tight immediately after the cleaning process with a cap or plug in accordance with NAS 847 (see 5.7). The openings shall remain capped until immediately before connecting to t
44、he equipment for which the pipe is intended. 4.10 Heat treated piping and tubing. Pipe or tubing that has had heat applied at the site of installation to assist in forming shall be returned to the shop or other areas where facilities exist for recleaning, repickling (if necessary), and retesting. 5.
45、 DETAILED REQUIREMENTS 5.1 Safety precautions. The contractor or shipyard representative shall ensure that this cleaning is coordinated through the safety superintendent to provide adequate personnel protection from acid and chemical hazards. In general, all chemicals involved are harmful to the eye
46、s and skin. Personal contact with chemicals should be avoided. Obtain medical attention immediately if acid or caustic gets in the eyes. Face shields or goggles shall be worn by personnel involved in chemical cleaning. Avoid breathing mists or vapors over mixing tanks. Protective equipment, includin
47、g personal protective equipment (PPE) for eyes, face, head, and extremities, protective clothing, respiratory devices, and protective shields and barriers, shall be required for personnel who are mixing caustic or acidic cleaning solutions. 5.2 Cleaning. The cleaning and treatment compounds describe
48、d herein are environmental pollutants if discharged to the water and may be toxic to fresh water and marine organisms. Disposal procedures specified in 5.9 shall be followed. Pickling is not required to clean existing installations during repair or modification unless the pipe or tube has internal o
49、xide scale that cannot be removed by wire brush, water jet, or flushing. If new piping sections have been installed, only the new pipe or tube installed requires pickling. New piping sections do not require pickling if already pickled as specified herein prior to delivery and a clean condition has been maintained during construction. Heat discoloration of piping interior due to w
