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|  MIL-S-24660(SH)
3.2.1 Recovered materials. Unless otherwise specified herein, all
equipment, material, and articles incorporated in the products covered by this
specification shall be new and may be fabricated using materials produced from
recovered materials to the maximum extent practicable without jeopardizing the
--n--ended use
i -t --
The term "recovered materials" means materials which have been
collected or recovered from solid waste and reprocessed to become a source of
raw materials, as opposed to virgin raw materials. None of the above shall
be interpreted to mean that the use of used or rebuilt products is allowed
under this specification unless otherwise specifically specified.
3.3 Construction. The sprinkler head may have a single or multiple
open orifice directing the stream at a minimum homogeneous conical spray angle
of 180 degrees. The body shall be designed with 1/2-inch tapered male pipe
threads for installation. The thread length shall suit the fitting. The
minimum size of any orifices shall be as specified in table I (see 6.2). The
base shall be no larger than 1-3/4 inches square or hexagonal in shape. The
overall maximum length shall not exceed 2-1/2 inches and the overall weight shall
not exceed 13 ounces, The angle of discharge, orifice size, and manufacturer's
name or trademark shall be stamped, cast or engraved on one side of the base.
Discharge capacity and orifice sizes for 180 degrees sprinkler heads.
TABLE I.
Capacity gallons per minute (gal/rein)
50 pounds per square inch I
(lb/in2) -
Inches
100 lb/in2
I
I
minimum
Orifice
Minimum
Maximum
orifice
Minimum
Maximum
size
13
11
7
9
0.203
16
20
18
18
15
.250
13
25
21
17
.281
15
21
32
28
24
,328
24
20
41
37
30
,375
26
28
58
52
40
36
.438
32
3.4 Workmanship. Fittings shall be sound. smoothly cored, true to form,
uniform in texture, and free from cold shunts, porosity, or any-other defects
which may affect their serviceability. They shall be thoroughly cleaned, both
inside and outside, and all fins and roughness shall be removed. Defects to
sprinkler heads shall be repaired or welded only when the maximum depth does not
exceed 20 percent of the casting thickness and individual repair areas do not
involve more than 4 percent of the casting surface. Any repair shall not
adversely affect the strength, use or machinability of the sprinkler head.
4.
QUALITY ASSURANCE PROVISIONS
4,1 Responsibility for inspection. Unless otherwise specified in the
contract or purchase order, the contractor is responsible for the performance
of all inspection requirements as specified herein. Except as otherwise speci-
fied in the contract or purchase order, the contractor may use his own or any
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