M)L‐DTL‐
C
. . Class A, plain. The Class A, plain Siamese connection shall have one internal threaded swivel end
and two external threaded ends, and shall be similar to Drawing
E
and Figure .
. . Classes B, C, D, and E, gated‐Siamese connections. The gated‐Siamese connections shall be gated
with / ‐turn, long‐handled, shut‐off valves of the full‐flow, ball or cylindrical, floating‐gland type. The
cylindrical floating gland type shall operate through bypasses in the body of the cylinder. The valves shall be
operable and leakproof under a pressure of
psi, and shall be similar to Drawing l
E
and Figures
, and .
. Type XV, reducer hose.
. . Class A, double internal. The Class A reducer shall be of the double swivel type similar to Drawing
E
and Figure . When specified see . , the ends shall be equipped with long handles.
. . Class B, double external. The Class B reducer shall be the double‐external type consisting of a
center piece and two external threaded ends similar to Figure and to Drawing
E
.
. . Class C, internal to external. The Class C reducer shall be of one‐piece construction with an
internal threaded end and an external threaded end. The coupling shall be similar to Figure and to Drawing
E
.
. . Class D, external to internal. The Class D reducer shall be of two types. The inch by ¾ inch size
shall be one‐piece construction similar to Figure . The ‐ / inch by l‐ / inch and the inch by ‐ / inch
size shall consist of an external end and an internally threaded swivel end equipped with lugs and shall be
similar to Figure and to Drawing
E
. When specified see . , the ends shall have long arm
handles.
. Type XV), adapter, straight, pipe to hose.
. . Class A; internal to external. Unless otherwise specified see . , the Type XV), Class A adapter
shall consist of an internal threaded swivel end and an external threaded end similar to figure . When
specified see . , the Type XV), Class A adapter shall be a rigid one‐piece construction without swivel.
. . Class B, external to internal. The Class B adapter shall be of one‐piece construction, shall consist
of an external threaded end and an internal threaded end, and shall be similar to Figure . A hexagonal‐
shaped wrenching feature shall be provided.
. . Class C, external to external. The Class C adapter shall be of one‐piece construction, shall have an
external thread on each end, and shall be similar to Figure . The center portion shall be provided with a
hexagon‐shaped wrenching feature.
. . Class D, external to external. The Class D adapter shall be of one‐piece construction and shall have
an external thread on each end. The center piece shall be equipped with rocker‐type lugs. The adapters shall
be similar to Figure .
. . Class E, external to internal. Unless otherwise specified see . , the Class E adapter shall consist
of an external threaded end and an internal threaded swivel end equipped with lugs. When specified see
. , the external threaded end shall be provided with a cap attached to the main body by a matching metal
chain. When specified see . , the adapter shall be rigid, one‐piece construction without swivel. The
adapters shall be similar to Figure .
. . Class F, external to internal. The Class F adapter shall be of one‐piece construction with one inch
internal threaded end equipped with lugs and one inch external grooved end. The inch grooved end shall
conform to the dimensions and tolerances specified in A‐A‐
. The grooved adapter shall be similar to Figure
.
7
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