(2)
Place parts in a rack so that all surfaces will have direct contact with vapor.
NOTE: Parts that do not allow free drainage shall be racked so they may be turned over below vapor level to eliminate degreaser solvent (SECTION VII) dragout when parts are removed.
WARNING: USE CORRECT PERSONAL PROTECTION. COMPRESSED AIR WILL CAUSE LOOSE PARTICLES THAT CAN GET IN YOUR EYES. COMPRESSED AIRFLOW CAN CAUSE CUTS, DO NOT POINT IT AT YOUR SKIN.
(3)
Spray flush parts free of heavy grease or other contaminants, then position parts in vapor zone for final cleaning.
WARNING: USE CORRECT PERSONAL PROTECTION. COMPRESSED AIR WILL CAUSE LOOSE PARTICLES THAT CAN GET IN YOUR EYES. COMPRESSED AIRFLOW CAN CAUSE CUTS, DO NOT POINT IT AT YOUR SKIN.
(4)
Air-dry parts with low pressure compressed air (20 psig (137,895 kPa). maximum)
C. Method No. 203C: Using Glass Bead Peening
Clean parts using glass bead peening as follows:
NOTE: Do not glass bead peen parts until fluorescent penetrant (SECTION III) or magnetic particle inspection (SECTION III) has been performed. Maximum pressure of 20 psig (137,895 kPa) shall be used on titanium couplings. Maximum pressure of 40 psig (275,79 kPa) shall be used on all other coupling materials.
WARNING: USE CORRECT PERSONAL PROTECTION. COMPRESSED AIR WILL CAUSE LOOSE PARTICLES THAT CAN GET IN YOUR EYES. COMPRESSED AIRFLOW CAN CAUSE CUTS, DO NOT POINT IT AT YOUR SKIN.
(1) Clean hard carbon, paint, corrosion, and scale from parts by peening with glass beads (Screen No. 100-230 (130 Grit) Class IV, Size AF or AG) (SECTION VII).
Cleaning
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WARNING: SOLVENT VAPORS ARE TOXIC AND FLAMMABLE. DO NOT INHALE VAPORS. OBSERVE FIRE PRECAUTIONS.
(2)
Clean parts with solvent (Federal Specification P-D-680, Type I) (SECTION VII) to remove oil and grease contamination.
NOTE: Glass bead peening equipment shall be cleaned and recharged with new beads after each 24-hour period of operation.
(3)
Mask any surfaces that could be damaged by peening.
CAUTION: REGULATE AIR PRESSURE TO KEEP EROSION OF BASE METAL TO A MINIMUM. KEEP NOZZLE IN MOTION TO PREVENT BLAST FROM DWELLING ON ONE SPOT.
(4)
Peen corroded areas with glass beads, Step (1), until corrosion products are removed.
(5)
Rinse surface free of glass beads.
(6)
Dry part in an oven at 205 to 235F (96 to 112C) for one hour.
D. Method No. 203D: Using Abrasive Blasting Clean parts using abrasive-blasting method as follows: NOTE: Do not abrasive blast part until fluorescent penetrant inspection (SECTION III) or magnetic particle inspection (SECTION III) has been performed.
WARNING: USE CORRECT PERSONAL PROTECTION. COMPRESSED AIR WILL CAUSE LOOSE PARTICLES THAT CAN GET IN YOUR EYES. COMPRESSED AIRFLOW CAN CAUSE CUTS, DO NOT POINT IT AT YOUR SKIN.
(1)
Clean hard carbon, lead deposits, corrosion, and scale from parts by abrasive blasting using a standard sandblast cabinet and sand (120 Grit) (MIL-A-22262) (SECTION VII) or aluminum oxide grit (120 Mesh) (SECTION VII).
WARNING: SOLVENT VAPORS ARE TOXIC AND FLAMMABLE. DO NOT INHALE VAPORS. OBSERVE FIRE PRECAUTIONS.
(2)
Clean parts with solvent (Federal Specification P-D-680, Type I) (SECTION VII) or vapor degreaser to remove oil and grease contamination.
(3)
Mask any surfaces that could be damaged by abrasive blasting.
Cleaning
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WARNING: USE CORRECT PERSONAL PROTECTION. ABRASIVE BLAST PROCEDURES WILL CAUSE LOOSE PARTICLES THAT CAN GET IN YOUR EYES.
CAUTION: REGULATE AIR PRESSURE TO KEEP EROSION OF BASE METAL TO A MINIMUM. KEEP NOZZLE IN MOTION TO PREVENT BLAST FROM DWELLING ON ONE SPOT.
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本文链接地址：标准施工手册 STANDARD PRACTICES MANUAL 20-00-02/70-00-01(23)
