A-A-52047 Tubing, Nonmetallic Rubber And PlasticThis commercial item description CID covers the general requirements for tubing, nonmetallic rubber and plastic. Tubing, nonmetallic rubber and plastic covered by this CID is intended for commercial/industrial applications.

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A-A-52047D

3.3.4 Flexing. The two 3-foot lengths of electrically conductive rubber tubing shall be passed back and forth over a pulley 1.750 inches in diameter. One end of the tubing shall be fixed vertically with the end facing down. The tubing shall pass over the pulley so that the movable end will hang vertically downward. A 5-pound weight shall be suspended from the second end. The pulley shall be caused to raise and lower vertically for a distance of 2 feet at a rate of 50 times (25 cycles) per minute for 2,500 cycles.

3.4 Dimensions. Dimensions and tolerances shall be as shown in tables V through VIII for the types indicated.

TABLE V. Dimensions for type I and type V (inches).

Nominal size	Class 1, light wall		Class 2, heavy wall		Class 3, pressure		Class 4, gooch
Nominal size	Inside diameter ±0.016	Wall thickness ±0.016	Inside diameter ±0.016	Wall thickness ±0.016	Inside diameter ±0.016	Wall thickness ±0.016	Inside width measured flat ±0.016
1/8	.125	.031	.125	.062	.125	.188	1.250
3/16	.188	.047	.188	.094	.188	.188	1.500
1/4	.250	.062	.250	.094	.250	.188	1.750
5/16	.312	.062	.312	.094	.312	.188
3/8	.375	.062	.375	.125	.375	.250
1/2	.500	.094	.500	.125	.500	.250
5/8	-	-	.625	.125	-	-
3/4	-	-	.750	.125	-	-
1	-	-	1.000	.125	-	-

TABLE VI. Dimensions for type II tubing (inches).

Nominal size	Class 1,l wall		Class 2, heavy wall		Class 5, vacuum connections
Nominal size	Inside diameter ±0.016	Wall thickness ±0.016	Inside diameter ±0.016	Wall thickness ±0.016	Inside diameter ±0.016	Wall thickness ±0.016
1/8	.125	.047	.125	.094	.188	.188
3/16	.188	.047	.188	.094	.250	.188
1/4	.250	.062	.250	.125	-	-
5/16	.312	.062	.312	.125	-	-
3/8	.375	.062	.375	.125	-	-
1/2	.500	.062	.500	.125	-	-
5/8	.625	.062	.625	.125	-	-
3/4	-	-	.750	.125	-	-
1	-	-	1.000	.125	-	-

TABLE VII. Dimensions and tolerance, type IV tubing (inches).

Nominal size	Inside diameter ±0.016	wall thickness	Tolerance ±
1/8	.125	.031	.008
3/16	.188	.094	.016
1/4	.250	.062	.016
5/16	.312	.062	.016