Abstract: As a failure，breaking of the scraper hydraulic cylinder swing arm is frequently encountered with during the operation of the SAWH pipe production line，which seriously affects the operation efficiency.Based on relevant analysis，it is identified that the failure is caused in the event that when the steel strip tail-end gets out of the conical head，due to a significant rebound of the tail-end，a strong impact is produced，and imposed upon the scraper， which leads to the breaking of the cylinder swing arm.Accordingly， it is proposed to get the decoiler equipped with an active roller to reduce the rebound radius of the strip tail-end so as to avoid the impact thereby upon the scraper.As a result，the failure rate of the equipment will be in turn reduced，and the operation efficiency of the pipe production line enhanced.