MIL-DTL-15606J
3.11.2.1 Working surfaces. Crumbling or chipping at corners and edges of working surfaces shall not exceed
¼ inch (see figure 3). Corners and edges shall be sufficiently solid and strong to prevent more than ¼ inch crumbling
or chipping when thumb pressure is applied. At feather edges where anchor bolt holes are close to the burner throat,
crumbling or broken out areas are allowable to a maximum of ½ inch in depth (see 4.5.3).
3.11.2.2 Buried surfaces. At buried surfaces (see 6.11.1 and figure 3), crumbling or chipping of edges and
corners shall not exceed ½ inch in depth. Defects on the surface itself shall not exceed ¼ inch in depth by 1 inch in
length.
3.11.3 Branding. The indented or formed symbol or lettering denoting the manufacturer shall be legible.
3.12 Spall resistance. Products provided under this specification shall be spall resistance in accordance with
best industry practices for the intended use (see 4.8). As guidance, a range of physical properties is shown in 6.1
3.13 Toxicity. When evaluated in accordance with 4.7, the brick and tile shall have no adverse effect on the
health of personnel when used for their intended purpose and shall not cause any environmental problems during
4. VERIFICATION
4.1 Classification of inspections. The inspection requirements specified herein are classified as follows:
a.
First article (see 4.3).
b.
Conformance inspection (see 4.4).
4.2 Sample size. Sampling for first article and conformance inspection shall be performed in accordance with
ANSI/ACQ Z1.4 and table II. For purposes of sampling, an inspection lot for examinations and tests shall consist of
all material of the same grade, size, and shape offered for delivery at one time. Unless otherwise specified (see 6.2),
the unit of sample shall be one brick or one tile.
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