MIL-DTL-24688A
4.4.16 Toxic gas generation (type I, type II, and type III). Toxic gas generation determination shall be
conducted in both flaming and non-flaming modes in accordance with ASTM E662. Gas sampling and
concentrations shall be measured in accordance with ASTM E800. Fourier Transform Infrared Spectrometer
(FTIR), Gas Chromatography/Mass Spectrometer (GC/MS), or similar analytical techniques which can produce
traceable results shall be used for the gas analysis (see 3.18).
4.4.17 Steam aging (type I and type III, classes 1, 3, and 5). Steam aging shall be conducted in accordance
with ASTM D3574 using Procedure J1. A random batch sample shall be selected that is large enough to cut into two
equal sizes to fit into the autoclave. One sample shall be steam aged and the other shall be used to make visual,
dimensional, weight, and tensile strength comparisons after the sample is dry. Tensile strength shall be conducted
according to ASTM D3574, Test E (see 3.19).
4.4.18 Fungus resistance (type I and type III). Insulation or insulation system shall show no signs of fungal
growth after 30 days of incubation in accordance with ASTM C1338 (see 3.20).
4.4.19 Odor (type I and type III). The material shall produce no offensive odor when tested in accordance with
ASTM C1304 (see 3.21).
4.4.20 Toxicity (type I, type II, and type III). The cellular polyimide foam insulation and any of its
components shall be evaluated by the Navy and Marine Corps Public Health Center (NMCPHC) using the
administrative Health Hazard Assessment (HHA). Sufficient data to permit an HHA of the product shall be
provided by the manufacturer/distributor to the NMCPHC as directed by the Qualifying Activity (QA). To obtain
current technical information requirements specified by the NMCPHC, see 6.5.
4.4.21 Off-gassing (type I, type II, and type III). The material shall be tested by a Government approved
testing facility in accordance with S9510-AB-ATM-010 chapter titled "Material Control Program." The results shall
4.4.22 Identification markings. Panels shall be visually examined to determine conformance to 3.25.
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. Insulation as specified herein is intended for the following applications.
6.1.1 Type I. Type I material is a general purpose insulation for thermal and acoustical applications designed
to be used as a direct substitute for fibrous glass insulation on an inch for inch thickness basis. Type I material is
intended as an alternative for MIL-I-742, Type II and MIL-I-22023, Type I and Type II (all classes).
6.1.2 Type II, class 1. Type II, Class 1 material is intended for use as a thermal insulation substitute for
MIL-I-742, Type I. Type II, Class 1 material is not intended for use as an acoustic material.
6.1.3 Type II, class 2. Type II, Class 2 material is designated for use as a lightweight acoustical absorption
material for overheads (exclusive of suspended ceiling system panels) and bulkheads in dry, clean shipboard spaces
where moisture and water vapor barriers are not required. This material should not be used in areas such as main or
auxiliary machinery rooms, galleys, or showers where moisture, petroleum products, or noxious contaminants may
be absorbed by the insulation. Type II, Class 2 material is intended for use as an acoustical insulation substitute for
MIL-A-23054.
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