MIL-DTL-18295F
3. REQUIREMENTS
3.1 General. The fleet mooring chain assembly includes stud link chain and joining components.
A ground leg assembly attaches anchors to a ground ring which, in turn, is attached to a riser
subassembly which is attached to a buoy. The chain assemblies are intended for continuous use
for long periods of time.
3.1.1 Construction. The mooring chain assembly shall be fabricated and conform to material
composition of SAE J404, class 1330 and 4340 (UNS G13300 and G43400) as modified herein.
3.1.2 Chain, type 1. The chain link stud shall be modified to receive cathodic protection
(see 3.3.6, 6.2, and figures 1b, 1c, and 1d).
3.1.3 Chain type 2. The chain link stud shall not be modified for cathodic protection (see 6.2).
3.2 Figures and tolerances. Figures 1a-1, 1a-2, 1b, 1c, 1d, 2, 3, 4, 5, 5a, and 5b through 21, are
not intended to be engineering drawings. All components to be manufactured must meet the
requirements set forth in this specification and be compatible with other components as specified
in this specification. All components must satisfy requirements specified in figures 1a through 21
as applicable. When specified in the contract (see 6.2), component manufacturers shall provide
fabrication drawings with dimensions prior to manufacturing. Unless otherwise specified, casting
tolerances shall be in accordance with SFSA Steel Castings Handbook, Supplement 3 (see 6.2).
3.2.1 Components. The following items are components of a mooring chain assembly:
a. Stud link chain (figures 1a-1, 1a-2, 1b, 1c, 1d) procured in 90-foot (27.4 metre (m))
lengths (shot).
b. Chain joining link (figure 2).
c. Anchor joining link (figure 3).
d. Ground ring (figure 4).
e. Swivel shackle (figure 5, 5a, 5b).
f. Spider plate (figure 6).
g. Plate sinker shackle (figure 7).
h. Pear link (figure 8).
i. End link (figure 9).
j. Joining shackle (figure 10).
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