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SHEAR (ASTM A-1056)
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| Two 5 foot lengths
of randomly selected hubless cast iron soil pipe were joined
with an MG COUPLING, torqued to 175 inch-pounds, and the ends
of the assembly were sealed with test plugs. One pipe was
rigidly supported while the other was supported by a single
block near the end of the pipe. The assemble was filled with
water and the hydrostatic pressure was held at 4.3 psi for
the duration of the test. A load of 50 pounds per inch of
nominal diameter of the pipe was uniformly applied over an
arc of 120 degrees and along a longitudinal distance of 12
inches at the unsupported end of the pipe immediately adjacent
to the coupling and held for 15 minutes. Test required displacement
not to exceed 0.375 inches from true alignment and no leakage.
|
|
 |
| MG COUPLING (sizes
tested) |
Shear (pounds) |
Displacement (inches) |
Results |
| 1½" |
75 |
0.018 |
No Leakage Occurred |
| 1½"x
2" |
75 |
0.024 |
No Leakage Occurred |
| 2" |
100 |
0.017 |
No Leakage Occurred |
| 3" |
150 |
0.019 |
No Leakage Occurred |
| 4" |
200 |
0.029 |
No Leakage Occurred |
| 5" |
250 |
0.030 |
No Leakage Occurred |
| 6" |
300 |
0.031 |
No Leakage Occurred |
| 8" |
400 |
0.055 |
No Leakage Occurred |
| 10" |
500 |
0.080 |
No Leakage Occurred |
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