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Premium Thread Coupling

  1.  All of our couplings are made from high quality API couplings raw material.
  2.  Steel Grade: J55/K55/N80/L80-1/L80-3Cr/L80-9Cr/L80-13Cr/P110/13Cr-110
  3.  Feature: Premium threaded connections use metal-to-metal seals to ensure both liquid and gas sealability.
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TIANJIN RICHSEN OIL EQUIPMENT CO.,LTD is an OCTG Comprehensive solution provider based on China serving global market. 

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