ZZ-H-617C
3.2 Construction. The hose shall consist of an inner rubber tube, an intermediate textile-fabric reinforcement, and an outer rubber cover. The tube and cover shall be of seamless construction, uniform in thickness, and free from pitting.
3.2.1 Inner tube. The inner tube shall consist of a smooth, seamless compound of synthetic rubber that meets the requirements of this specification.
3.2.2 Reinforcement. The reinforcement shall consist of one or more plies of cotton or synthetic fabric, or braided cotton or synthetic cord, or a combination of both. The layers of fabric or braided cord shall be well impregnated with rubber compound so that the plies will adhere firmly to one another and to the inner tube and outer cover. When more than one ply of reinforcement is used, there shall be a distinct layer of rubber compound between the plies. When woven fabric is used, it shall be wrapped around the tube on a bias of
45 with the edges lapped or sewed.
3.2.3 Outer cover. The outer cover shall consist of a synthetic rubber that meets the requirements of this specification. It may be of one or a combination of two or more synthetic rubbers.
3.3 Dimensions.
3.3.1 Diameters. The inside and outside diameters of the hose shall be as specified in table I.
TABLE I. Hose diameters.
Inside Diameter, inch |
Outside Diameter, inch |
|
Braided Type |
Wrapped Fabric Type |
|
.156 ± .016 |
.344 + .047 .016 |
.375 + .047 .016 |
.219 ± .016 |
.406 + .047 .016 |
.438 + .047 .016 |
3.3.2 Lengths.
3.3.2.1 Uncut lengths. Unless otherwise specified (see 6.2), hose shall be furnished in lengths of
50 or 500 feet. Lengths of 50 feet shall be in one piece with a length tolerance of 1 percent. Lengths of
500 feet may be in four pieces, the shortest piece being no less than 100 feet in length. A tolerance of
6 inches shall be allowed for uncut hose of 100 feet and above.
3.3.2.2 Cut lengths. When hose is furnished in cut lengths, length tolerances shall be as specified in table II.
TABLE II. Cut length tolerances.
Nominal Cut Length, inches |
Tolerance |
Up to and including 3 |
.062 inch |
Over 3 through 18 |
.125 inch |
Over 18 through 100 |
.250 inch |
Over 100 |
1 percent |
3
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