Pipeline Internal Caliper Emulational Pull-through Testing System

This work introduces the configuration and working principles of the pipeline internal caliper emulation pull-through testing system,proves that this testing system can effectively validate any working performance of calipers through numerous tests,and solves actual difficulties during a pull-through test,which plays a key role in pipeline internal inspection facilities used to know accurate pipeline mileage during field inspection,so as to accurately find out defects and reduce excavation errors during pipeline maintenance.