With the rapid development of the electric power industry, cable threading pipe has been widely popularized and applied in the process of national grid construction and transformation. In daily life, people usually choose rigid PVC pipe with good corrosion resistance and insulation performance as the cable threading pipe material. In the industrial field, according to different service environments, materials such as carbon steel and stainless steel are often used. Among them, 316L stainless steel is widely used in extremely harsh industrial environments because of its excellent corrosion resistance and processability.
 
The cold deformed 316L stainless steel cable threading seamless pipe used in an oil field cracked, the outer surface of the pipe contacted with crude oil containing H2S and C1-, and the inside was filled with dry sand and copper core. In order to find out the causes of pipeline cracking, the physical and chemical inspection of the failed pipeline was carried out by means of microstructure observation, mechanical property test and fracture analysis, so as to prevent the recurrence of similar problems.https://www.landee.cn/