伊娃波纹管

EVAcorrugated pipe: Material :LLDPE EVA O.D:22-150 mm Length:Less than 10m Standard:ISO9001:2000 Environmental Requirements:Rohs and PAHs Characteristics:soft and easy to bend,the surface are smooth, it alseo has shiny Surface,colorful,good flexibility Application:for ventilation, water, oil, and threading through. mainly used for vacuum cleaners, washing machines and other home appliances. Torsional flex test of hose Test Equipment:Twist tester Test Method:The length of hoses is 30±1 inches(762±25mm ), excluding installation part.Clip both ends of the sample hose to the two mandrels of the distortion testing machine,then test them at a 30±2 r/min of rotation speed till they appear fracture or to the fixed endpoint. Breakage of the hose began to tearing, perforating, or reinforcing ribs breaking, or the lining of the hose or liner damage to the circle, or above mixing circumstances. Record broken time for the first time or the cycle times when to the fixed endpoint, fracture type, ambient temperature, sample descriptions and the number of test samples. Test Equipment: Wear test machine Test Method:Fix a new standard 500 grit sand paper to the cylinder of wear test equipment,and then install one end to mechanical shaft of the equipment,put the other end into guide frame hanging heavy substance weighing 454±3 g,after that begin the reciprocating friction testing at a 20±1r/min speed.Avoid swing of the heavy substance during testing process.The test finishes until hose appears perforation,frazzle or to the fixed endpoint. Record broken time for the first time or the cycle times when to the fixed endpoint, fracture type, ambient temperature, sample descriptions and the number of test samples.