MIL-DTL-15606J
3.3 Dimensions. Refractory brick (henceforth known as brick) shall be furnished in the dimensions specified
(see 6.2), and shall conform to S5102-1385784 for shapes shown thereon. Burner tile shall be furnished in
dimensions specified (see 6.2), and shall conform to 810-1385708 for shapes shown thereon. Brick (including those
with anchor bolt recesses) are described as standard shapes (see 3.4.1, 4.5.1, and 6.2). Other brick and burner tile
3.4 Tolerances.
3.4.1 Standard shape brick. Length, width, and thickness of standard rectangular refractory brick (including
those recessed for anchor bolts), as shown on S5102-1385784, shall be within the limits specified in table I
TABLE I. Allowable dimensions of standard shape brick.
Nominal dimensions
Minimum
Maximum
(inches)
(inches)
(inches)
Length
139/16
13.36
13.77
9
8.86
9.14
Width
6¾
6.62
6.88
4½
4.41
4.59
2¼
2.20
2.30
Thickness
2½
2.44
2.57
1¼
1.19
1.31
2
1.94
2.06
3.4.2 Special shape brick. Special shape brick shall not deviate from specified dimensions more than
±2 percent on dimensions of 4 inches or greater, or ±3 percent on dimensions less than 4 inches (see 4.5.4.2 and
3.4.3 Burner tile. Burner tile shall conform to the dimensions and tolerances shown on 810-1385708.
Non-parallelism of abutting tile faces, arranged as shown on figure 1, shall not exceed ⅛ inch (see 4.5.4.3 and 6.2).
3.5 Warpage.
3.5.1 Standard shape brick. Any gap between adjacent, stacked standard shape brick shall not exceed 3/32 inch
(see 4.5.5.1).
3.5.2 Special shape brick. Special shape brick shall be free of swells, warps, and distortions that would prevent
ready and accurate laying up with a maximum joint gap of ⅛ inch (see 4.5.5.2).
3.5.3 Burner tile. Burner tile shall be free of swells, warps, and distortions that would prevent ready and
accurate laying with a maximum joint thickness of ⅛ inch between abutting surfaces. A straight edge laid along the
longest dimension on the working face of the tile shall not reveal warpage greater than ⅛ inch (see 4.5.5.3).
3.6 Marking. The grade designation, "AA", "A", or "B", and the brand (or such name or symbol as will serve
to identify the manufacturer) shall be molded into each brick or tile (see 4.5.2 and 6.2). As an alternate method (for
grade designations only), the grade designations may be stamped with permanent ink on each brick.
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