IEC 61386-22:2021 Clause 10.4 and Figure 101 Bending Test Apparatus for Pliable Conduit

The LS-B53 Bending Test Apparatus for Pliable Conduit is engineered for evaluating the bending performance of flexible metal conduits. The specimen is securely mounted using specialized fixtures, and with designated rollers, it undergoes bidirectional bending and pressure retention as per specified protocols, replicating real-world conduit bending scenarios. Post-test, the specimen is examined for visible cracks, and the ability of the inner diameter gauge to pass through the conduit under its own weight is verified. This process evaluates the structural integrity and durability of the conduit under repeated bending and pressure conditions. The operation procedure is standardized, ensuring a controllable bending process, providing a reliable basis for quality assessment of flexible metal conduits. Standards: IEC 61386-22:2021, GB/T 20041.22-2009, JG/T 526-2017. Specification: Sample sizes: 16, 20, 25mm; Roller radius: 48, 60, 75mm; Bending angle: 90°. Instruction: Secure the sample vertically on the tester, select the appropriate roller, manually bend the sample 90° left, restore, then 90° right, and restore. Repeat four times. Bend 90° right, hold for 5 minutes. Rotate specimen 45°±5° and insert the gauge; it should pass smoothly.