Table 5-2.—Liquid Oxygen Storage Tank Sampling Schedule
SAMPLE TAKING.— In order to exercise
rigid control over the quality of LOX
manufactured by the Navy or civilian contractors
and to test for suspected contamination, a
sample must be taken from the LOX container.
Figure 5-10 illustrates the equipment and setup
using the G-276 LOX sampler. Samplers are
prepared at depot maintenance activities and
shipped to the using activities, as required. Depot
preparation includes the separation of valve,
adapter, and cylinder; baking and evacuating the
cylinder for 1 hour, and flushing once with
gaseous oxygen; and finally, while still in the oven
and still evacuated, the cylinder is filled to 20 psi
with gaseous oxygen. The valve is then closed and
the cap installed, and then it is shipped to the
using activity.
There are several precautions that should be
observed while you are sampling. Observing these
precautions will help to ensure a representative
sample. Do not sample from a trailer hose. Use
only a short connection between the tank and
sampler. A few feet of copper tubing, three-eights
Figure 5-10.—Sampling.
5-13
