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

LS-B53 Bending Test Apparatus for Pliable Conduit is suitable for testing the bending performance of bendable metal conduits. The specimen is vertically fixed using specialized fixtures, and with the corresponding rollers, the specimen is subjected to bidirectional bending and pressure holding operations according to a prescribed method, simulating the bending conditions of the conduit in actual use. After the test, the specimen is observed for any visible cracks, and it is verified whether the inner diameter gauge can pass smoothly through the conduit under its own weight. This assesses the structural stability and durability of the conduit under repeated bending and pressure holding conditions. The equipment operation procedure is standardized, and the bending process is controllable, providing an objective and reliable basis for the quality inspection of bendable metal conduits.

Standards：

Specification:
•  Sample specifications: 16, 20, 25mm
•  Roller radius: 48, 60, 75mm
•  Sample bending angle: 90°

Instruction:
Fix the sample vertically on the bending tester, select the roller with the corresponding radius to rotate the sample, manually bend the sample slowly 90° to the left, manually restore verticality, then manually bend it slowly 90° to the right, and manually restore verticality. This process is one operation, and it is operated 4 times in a row. Then manually bend the sample slowly 90° to the right and keep it for 5 minutes. Remove the bent specimen and rotate it (45±5)° so that the straight part of the specimen is (45±5)° with the plumb line, with one end facing up and the other end facing down. Finally, insert the inner diameter gauge from the top of the specimen and it should pass smoothly.

Standard:
IEC 61386-22 (GB/T 20041.22) “Conduit systems for cable management – Part 22: Particular requirements – Pliable conduit systems” Clause 10.4 and Figure 101

IEC 61386-22:2021 Clause 10.4

IEC 61386-22:2021 Figure 101