g. Test container is suitable for testing the following steel surfaces:
horizontal (up/down configuration), vertical, flat, curved, smooth,
pitted, and rough;
h. Kit uses test container, with resulting chloride ion extract
solution, as the titration container;
i. Chloride ion concentration is directly measured in micrograms per
square centimeter without using either conversion charts or tables.
2.7
ABRASIVE
The referenced abrasive specifications have maximum limits for soluble
salts contamination, however, this maximum level of contamination does not
guarantee that contamination will not be transferred to the steel surface
during abrasive blasting. Other factors such as on-site handling and
recycling can allow contamination of abrasive. Contractors are cautioned
to verify that the chosen abrasive, along with work and storage processes,
allow the final surface cleanliness requirements to be achieved.
Successful testing of chlorides in abrasive does not negate the final
acceptance testing of steel surfaces.
**************************************************************************
NOTE: The following paragraph is mandatory for all
PACNAVFACENGCOM projects. All other agencies may
use it after checking applicability.
**************************************************************************
[ Interpret MIL-A-22262 to include the meaning that abrasive material
contains a maximum one percent by weight of any toxic substance listed in
either Table Z-1, Z-2, or Z-3 or 29 CFR 1910-SUBPART Z, with the
exception of inert or nuisance dust materials, arsenic, beryllium, cadmium,
cobalt, lead, mercury, rhodium, silver, tellurium, thallium, and uranium.
]
**************************************************************************
NOTE: Reduce allowable gross gamma radioactivity to
5 picocuries per gram for all PACDIV projects.
Reduce in other areas if states or localities
require.
**************************************************************************
2.7.1
Non-metallic Abrasive
Conform to MIL-A-22262, Type I (Inorganic materials)[ except that the gross
gamma radioactivity shall not exceed 5 picocuries per gram]. Abrasive
shall be approved by the Naval Sea Systems Command and listed on the
appropriate Qualified Products List (QPL) for the specified materials. Use
sampling procedures and testing frequencies as prescribed in MIL-A-22262.
Use abrasive that is specifically selected and graded to provide a sharp,
angular profile to the specified depth. Do not use ungraded abrasive.
Make adjustments to processes or abrasive gradation to achieve specified
surface profile. Recycled non-metallic abrasive shall meet all
requirements of the specification each time that it is placed in the blast
pot.
SECTION 09971
Page 19
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