In October 2013, NACE International released an updated version of SP0169, "Control of External Corrosion on derground or Submerged Metallic Piping Systems," which presents methods and practices for achieving effective control of external corrosion on underground or submerged metallic piping systems. The revision was accomplished by NACE Task Group (TG) 360, "Piping Systems: Review of NACE SP0169-2007." This task group is administered by Specific Technology Group (STG) 35, "Pipelines, Tanks, and Well Casings," and is comprised of corrosion control personnel from oil and gas transmission companies, gas distribution companies, water and wastewater utilities, power companies, corrosion consultants, and others concerned with external corrosion control of underground or submerged metallic piping systems. This is the fifth revision of the standard, which was origi- nally published in 1969. The previous revision was performed in 1992 by NACE TG T-10-1, and since then the standard was reaffirmed (without revisions) in 1996, 2002, and 2007.
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