5 kN corrugated pipe transverse load tester, specimen length 1100 mm, take a point at the middle part of the sample at the wave Valley, apply lateral load to the end of the cylinder top pressure head with a lateral length of 12mm, reach the specified load value 800 N within 30s, after holding 2 min, Observe whether the surface of the pipe is broken and discharge 5 min, measure the outer diameter of the plastic bellows pipe or the short axis deformation of the flat pipe at the loading point, and the deformation shall not exceed 10 % of the outer diameter of the pipe or the short axis of the flat pipe.