MIL-PRF-2819H
4.4.7 Flexural strength. The flexural strength shall be determined in accordance with ASTM C203.
4.4.8 Physical changes under soaking heat (linear shrinkage). Specimens shall be measured, placed in an
electrically heated oven, and subjected to the maximum temperature for the respective class for 24 hours. The
specimens shall be removed from the oven and tested in accordance with ASTM C356 to determine linear
shrinkage. Class 2 shall be exposed to 1,200 °F. Class 3 shall be exposed to 1,700 °F.
4.4.9 Thermal conductivity. Thermal conductivity shall be determined in accordance with ASTM C177 or
ASTM C518. In case of a dispute, ASTM C177 shall be the referee test method.
4.4.10 Simulative performance. Simulative performance shall be determined in accordance with ASTM C411.
Class 2 shall be conducted at 1,200 °F and Class 3 at 1,700 °F test temperatures.
4.4.11 Fire resistance and smoke density. Specimens shall be tested in accordance with MIL-STD-1623.
4.4.12 Compatibility. A 6- by 6-inch block, 1½ inches thick, shall be uniformly surface coated, while at room
temperature, with approximately a ⅛-inch layer of finishing cement in accordance with ASTM C449. Drying time
under ambient air temperature conditions shall be determined. This test shall be repeated with a second block using
cement in accordance with MIL-C-2861. The drying time for this cement shall also be determined.
4.4.13 Toxicity. An HHA shall be conducted to ensure conformance to 3.9, as specified (see 6.2). The Navy
and Marine Corps Public Health Center (NMCPHC) will evaluate the insulation material using the administrative
HHA data provided by the manufacturer/distributor to the NMCPHC.
4.4.14 Off-gassing. The insulation material shall be tested for off-gassing at a Government approved testing
facility in accordance with S9510-AB-ATM-010 chapter titled "Material Control Program" (see 3.10 and 6.7).
4.4.15 Lot acceptance and rejection criteria. If one or more defects are found in any sample (see 4.3.2), the
entire lot shall be rejected. One hundred percent of the lot can be screened for the defective characteristic(s), or a
new lot shall be provided which shall be inspected in accordance with the inspections herein.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or
order (see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor personnel, these
personnel need to contact the responsible packaging activity to ascertain packaging requirements. Packaging
requirements are maintained by the Inventory Control Point s packaging activities within the Military Service or
Defense Agency, or within the military service s system commands. Packaging data retrieval is available from the
managing Military Department s or Defense Agency s automated packaging files, CD-ROM products, or by
contacting the responsible packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.)
6.1 Intended use. The insulation covered by this specification is intended for use for thermal insulation of
shipboard machinery and equipment operating to a 1,200 °F surface temperature for Class 2 and to a 1,700 °F for
Class 3. Class 3 is recommended for use on boilers.
6.2 Acquisition requirements. Acquisition documents should specify the following:
a.
Title, number, and date of this specification.
b.
Class required (see 1.2).
c.
Thickness, width, and length required (see 3.3.1).
d.
e.
f.
Inspection conditions, if other than specified (see 4.1.1).
g.
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