TM 5-4220-233-14
4-73. HYDROCARBON INSPECTION AND ANALYSIS.
a.
Visual Method. By definition, visibly clean is the absence of all particulate and non-particulate matter
visible to the normal, unaided (except for corrected vision) eye. Particulate is identified as matter of
miniature size with observable length, width and thickness. Non-particulate is film matter without
definite dimension. Examples of visual inspection are:
(1) A clean cloth placed over the discharge end may collect particulates and debris when air or
nitrogen is blown through the system.
(2) A component that has been "in service" may have visible signs of grease, dirt, etc.
(3) Absorption of oil or grease on a clean filter paper from a surface wipe.
b.
Ultraviolet Light Method. The ultraviolet method for detecting hydrocarbons may be employed in
different ways.
WARNING
Most ultraviolet lamps contain mercury. Extreme caution should be
taken not to break the mercury vapor lamp which will contaminate the
component or pipe being inspected and may also cause human injury.
(1) Direct Inspection: The component may be examined directly with the ultraviolet light. By passing
the component under the ultraviolet light, hydrocarbon surface contamination may exhibit
fluorescence where some hydrocarbons exist.
(2) Inspection of cleaning solution when detergent is used. Used cleaning solution collected in a clean
beaker when agitated will form bubbles. These bubbles, under ultraviolet light, may exhibit
fluorescence.
4-74. DOCUMENTATION AND RECORD KEEPING
a.
This diving system must retain certain records and documents to substantiate safety standards. The
individual operating the clean area being directly involved with system maintenance should therefore be
required to maintain records documenting cleaning operations in a systematic manner.
b.
The purpose of this section is to set forth a guide for documentation and record keeping involved in
cleaning operations and in no way intends to impose restrictions on the amount of paperwork a unit feels it
requires to operate safely.
c.
A sequential record should be maintained of components cleaned (i.e., regulators, pipe, and/or any
component) affecting reentry into a certified system. It should include a written record of all cleaning analyses
and testing accomplished as per this procedure. A data sheet should be completed for items cleaned and
tested per this procedure. All other information which pertains to the cleaning and/or testing of a particular item
shall be attached to or referenced on the data sheet. Such information should include, but not be limited to
outside laboratory reports, vendor data, etc. The completed data sheet(s) will then be attached to the REC
Report and referenced in the remarks column of the Reentry Control Log.
d.
It is possible that certain data and results will apply to more than one data sheet. For example, it is
possible that a sample for gaseous contaminants will be taken by sampling an entire system. This system will
consist of numerous Items, each having its own data sheet. To assure complete documentation, reference the
results of the gaseous contamination analysis on each affected data sheet.
e.
As a minimum the data sheet should reflect the following information:
(1) Unit
(2) Date
(3) Name of Point of Contact
(4) Description of Cleaning Performed
(5) Person Performing the Cleaning
(6) Results of any Analysis
(7) Description of Item Being Cleaned
(8) Part Number/NSN
(9) Remarks
4-111/(4-112 blank)
