... tubes and transport liquid, gas, oil etc.Quality Standard:GB/T 8163: Seamless steel tubes for liquid serviceGB 3087: Seamless ... ELEVATED TEMPERATURESAPI 5L: Line PipeSteel Grade:GB/T 8163: 10#, 20#, 35#, 45#, 16MN(Q345B)GB 3087: 10#, 20#, 35#, 45 ... Length, Fixed Length, SRL, DRLHeat treatment: Annealed, NormalizedSurface: Zinc coating, black phosphated, oiledPacking: Plastic plugs in both ends, ...