Technical data

Further evaluations are possible by cutting the fusion area and surrounding pipe and
fitting materials in thin strips for bend tests. The strips are then placed into a vise and
bent directly on the fusion interface and evaluated for separation. The same visual crite-
ria are used for fusion evaluation tests as is used for crush tests.
Couplings should have four strips cut from the fusion interface at 90° intervals as shown in
figure 5. The strips should be approximately 1/16"(1.5mm) to 1/8"(3mm) in thickness.
Figure 5
Tapping Tees should have four strips cut along the center line of the pipe through the
fitting fusion surface and a strip cut from the radial side of each half of the fitting.
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