MIL-STD-1330 Precision Cleaning And Testing Of Shipboard Oxygen, Helium, Helium-Oxygen, Nitrogen, And Hydrogen SystemsThis standard provides the requirements for precision cleaning and testing of oxygen or oxygen-enriched systems and components; oxygen generating plants including nitrogen, hydrogen, and demineralized water support systems and components; and helium, helium-oxygen, and hydrogen life support systems and components. Each activity will implement the applicable requirements of this document through a locally prepared and approved procedure. Activities subject to additional quality assurance requirements such as NAVSEA SS800-AG-MAN-010/P-9290 or NAVSEA SS521-AA-MAN-010 will obtain procedure approval from the applicable certifying activity.

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MIL-STD-1330D(SH) APPENDIX B

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d.    Stainless steel vacuum filtration column with not less than 250 mL capacity available from laboratory supply houses such as Fischer Chemical is preferred.  Alternately, an inexpensive Teflon vacuum or pressure filtration reservoir of 250 mL capacity minimum is available from Savillex Corp., 6133 Baker Rd, Minnetonka, MN

55345, (612) 935-4100, consisting of cap with connection for 1/4-inch tube, part number 501-4; upper segment, part number 504; lower segment, part number 504-47; and upper/lower segment connector, part number 502, or equal.

e.    Laboratory homogenizer with 500-1000 watt motor power with a no-load speed control of 10,000 to 30,000 revolutions per minute (rpm), and a 20 millimeter diameter saw tooth generator capable of homogenizing a 1 liter sample into a 1-5 micrometer emulsion at about 7,500 rpm loaded speed.  Suitable homogenizers and generators are available from Omni International Inc., 6530 Commerce Court, Gainesville, VA (800)776-4431, homogenizer part number GLH-115 and generator part number G20-195ST; or PRO Scientific, PO Box 448, Monroe, CT (203)452-

9431, homogenizer part number 01-01250 and generator part number 02-20200.  A holder or stand for the homogenizer is recommended.

f.     A drying oven capable of maintaining a temperature of 55 °C (131 °F) to 60 °C (140 °F).

g.    NOC sample/homogenizing bottles of 1-liter volume for collecting and homogenizing NOC effluent from oxygen systems or NOC effluent from oxygen components.  Ensure the opening is large enough to allow insertion of the homogenizer generator (item (e)).  Wide mouth glass sample bottles with external safety coatings and Teflon lined caps are acceptable, as are sampling containers manufactured from Teflon, Teflon lined glass, Teflon lined plastic, or stainless steel.  Suitable containers are available from laboratory supply houses such as Thomas Scientific.

h.    Graduated cylinders of 250 mL minimum volume with minimum graduations of 50 mL to measure 200 mL

of homogenized NOC sample to be filtered.  Cylinders should be glass or polypropylene.

i.     A vacuum collector of 500 mL capacity to collect filtered NOC when using a vacuum to draw the NOC through the membrane filter, preferably made of plastic.  The stopper used to seal the collector should be made of Teflon.  The stopper requires a 1/4-inch outside diameter hole for the tube from the filter support.

j.     Beakers of 250 mL capacity to collect the filtered NOC, preferably plastic, when pressurizing the NOC

sample.

k.    Beakers of 250 mL capacity to measure 100 mL of demineralized water used to wash the membrane filter. l.        Erlenmeyer flasks of 1 liter capacity, plastic or glass, for rinsing the homogenizer.  Ensure the opening is

large enough to allow insertion of the homogenizer generator (item (e)).

m.   Petri dishes, quantity 2, which are covered, glass and 50 millimeter minimum diameter for drying membrane filters in the oven.

n.    Forceps with non-serrated tips to handle filters.

o.    An eye dropper or pipette to transfer isopropyl alcohol to wet the membrane filter prior to filtration. p.    Teflon tape to prepare threaded connections on the filtration reservoir.

q.    If using a vacuum to draw the NOC through the membrane filter, a vacuum source capable of drawing a vacuum equivalent to 10 inches Hg (5 lb/in2  differential) and controllable at 2 inches Hg (1 lb/in2) increments. Sources of vacuum include traditional electric vacuum pumps; gas vacuum ejector pumps available from Cole- Parmer, and inexpensive water aspirator/ejector vacuum pumps such as Nalgene Part No. 6140-0010.

r.     If using pressure to push the NOC through the membrane filter, an oil-free air or nitrogen pressure source capable of providing 5 lb/in2  and controllable at 1 lb/in2  increments.

B.6  Reagents.

a.    Navy oxygen cleaner (NOC) in accordance with MIL-DTL-24800.

b.    Demineralized water in accordance with ASTM D1193 Type II or 1 micrometer nominal filtered Grade B

as specified in 4.2.

c.    Isopropyl alcohol, American Chemical Society (ACS) reagent grade, having an NVR of 5 ppm (0.005 percent) or less which is available from laboratory supply houses.

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