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  1. philip thomas

    API 5L - 2012 L245R or BR / L245N or BN

    thank you MarriolaV that's a great help
  2. philip thomas

    API 5L - 2012 L245R or BR / L245N or BN

    hello all, this is my first thread so i hope it is in the right place, looking at the two grades of API 5L - 2012 can someone help me identify what the letters B or BR AND N or BN stand for please,or is there a page online i can find the answer and list of all other letters used in API 5L ? so...

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