6API SPEC 5L(44th)-2007,Specification for Line Pipe[S].
7DNV-OS-F101-2007, Submarine Pipeline Systems [ S ].
8ISO 3183:2007(Modified),Petroleum and Natural Gas Industries-steel Pipe for Pipeline Transportation Systems[S].
9DEP 31.40.20.37-Gen.Line Pipe for Critical Service (Amendments/Supplements to ISO 3183:2007) [S].
10ISO 9765: 1990(E), Submerged Arc-welded Steel Tubes for Pressure Purposes-ultrasonic Testing of the Weld Seam for the Detection of Longitudinal and/or Transverse Imperfections [S].
