As the pipeline crack caused by various factors in use is inevitable, it is necessary to avoid damage or blind replacement of economic losses caused by the failure of the cracked pipe, cracked pipe performance assessment, control over their failure regularity.

Due to various factors in the use of a pipeline cracks will inevitably result in order to avoid the failure of pipe with cracks or damage caused by blind replacement, economic losses with cracks in the pipe for performance measurement, and control their destructive patterns is very necessary.

Because each kind of factor creates in the use the pipeline crack is inevitable, for avoids to containing the crack pipeline expiration to destroy the economic loss which or the blind replacement brings, to contains the crack pipeline to carry on the performance evaluation, grasps its destruction ru

As used in the inevitable pipe crack caused by various factors, to avoid failure damage of cracked pipes or blindly replace the economic losses brought about by, for evaluating the performance of cracked pipes, their failure is necessary.

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