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4-2.3 Test Equipment
a.
Each TPT is furnished with a testing kit having a description as follows:
Testing Kit, Petroleum, Aviation
Fuel Contamination, Portable
NSN 6630-01-008-5524
Instructions for using the kit are on a placard attached inside the storage chest. The kit is capable of testing for:
Particulate contaminants
API gravity
Free water content
b.
Laboratory facilities are not furnished specifically for a single TPT NSN 3835-01-182-1976. The Government
normally furnishes the following laboratories to the operating area:
Mobile Petroleum Laboratory
NSN 6640-00-902-4940
Airmobile Petroleum Laboratory
NSN 6640-00-902-9711
Petroleum Base Laboratory
NSN 6640-00-303-4940
Describing the make-up and use of these facilities is beyond the scope of this manual.
4-2.4 Sampling and Test Frequency
Sampling and test frequency are determined by the service mission and specific operations of the particular TPT. The
reader is referred to the U.S. Army publications listed in para. 4-2. It is recommended that a specific sampling and test
program be set up for each particular TPT. The following are guidelines to assist in determining the sampling and testing
requirements.
a.
Sampling and Testing to Determine Cut. The associated pipeline feeding the TPT may be in multiple fuel
service. Segregated storage of quality fuel in the TPT is desired. When a new batch of fuel is shipped up the pipeline,
the dispatcher will advise the operating supervision at the TPT of its estimated time of arrival. The fuel ahead of the new
batch may be taken into one fuel unit while it is intended to take the new batch into a different fuel unit. Between these
batches is a section of commingling called the "interface". Upon arrival of the interface, it is desired to cut the fuel to the
contaminated fuel storage module. When the interface has passed, the new batch is cut and sent to the specified fuel
unit. Both these operations are handled by manipulation of the switching manifold which will be discussed further on in
this chapter. The determination of when the interface has arrived and when it has passed is by sampling, visual
observation and comparison of the samples, and by gravity measurement, all of which can be handled by the portable
testing kit (para. 4-2.3a). Samples are drawn from the sampling assembly, Fig. 2-22, para. 4-2.1 la. The frequency of
sampling will be determined by the rate of flow for the particular installation. Actual experience with the particular
installation will be the final determining factor. Generally speaking, samples will be taken 30 minutes before the interface
is scheduled to arrive and then at ever decreasing intervals starting at 5 minutes down to 30 seconds until the change in
characteristics indicate the arrival of the interface. Flow is then immediately routed to the contaminated fuel module.
When sampling indicates the interface has passed, that is, two
4-5
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