Welded Large Diameter Line Pipe

The product covered by this investigation is certain welded carbon and alloy line pipe, of circular cross section and with an outside diameter greater than 16 inches, but less than 64 inches, in diameter, whether or not stencilled. This product is normally produced according to American Petroleum Institute (API) specifications, including Grades A25, A, B, and X grades ranging from X42 to X80, but can also be produced to other specifications. The product currently is classified under U.S. Harmonized Tariff Schedule (HTSUS) item numbers 7305.11.10.30, 7305.11.10.60, 7305.11.50.00, 7305.12.10.30, 7305.12.10.60, 7305.12.50.00, 7305.19.10.30. 7305.19.10.60, and 7305.19.50.00. Although the HTSUS item numbers are provided for convenience and customs purposes, the written description of the scope is dispositive. Specifically not included within the scope of this investigation is American Water Works Association (AWWA) specification water and sewage pipe and the following size/grade combinations; of line pipe: Having an outside diameter greater than or equal to 18 inches and less than or equal to 22 inches, with a wall thickness measuring 0.750 inch or greater, regardless of grade. Having an outside diameter greater than or equal to 24 inches and less than 30 inches, with wall thickness measuring greater than 0.875 inches in grades A, B, and X42, with wall thickness measuring greater than 0.750 inches in grades X52 through X56, and with wall thickness measuring greater than 0.688 inches in grades X60 or greater. Having an outside diameter greater than or equal to 30 inches and less than 36 inches, with wall thickness measuring greater than 1.250 inches in grades A, B, and X42, with wall thickness measuring greater than 1.000 inches in grades X52 through X56, and with wall thickness measuring greater than 0.875 inches in grades X60 or greater. Having an outside diameter greater than or equal to 36 inches and less than 42 inches, with wall thickness measuring greater than 1.375 inches in grades A, B, and X42, with wall thickness measuring greater than 1.250 inches in grades X52 through X56, and with wall thickness measuring greater than 1.125 inches in grades X60 or greater. Having an outside diameter greater than or equal to 42 inches and less than 64 inches, with a wall thickness measuring greater than 1.500 inches in grades A, B, and X42, with wall thickness measuring greater than 1.375 inches in grades X52 through X56, and with wall thickness measuring greater than 1.250 inches in grades X60 or greater. Having an outside diameter equal to 48 inches, with a wall thickness measuring 1.0 inch or greater, in grades X-80 or greater.