Chinese Steel Tube Manufacturer Our manufacturer is a newly restructured company previously belonging to Sinopec Oilfield Company. With three tubing and casing treading production lines, one ERW production line. As the newly established and professional manufacturer of casing, tubing and line pipe,drill pipe. our management and staff have been working in the casing and tubing production since 1988, as the earliest company for OCTG in China. Our register capital is RMB500 million. We mainly export API 5CT Casing and Tubing,API 5D Drill pipe to overseas. We also have API 5CT, API 5D Certificate issued by American petroleum institute. Specifications: Seamless OCTG: casing & tubing Features: Outside Diameter: 2 3 / 8"--13 3 / 8" Thickness: 0. 19"--1. 00" Steel grade: J55 K55 N80 P110 Standards: API 5CT Applications: for oil field industries Outer packing: bundles Product origin: China Drill pipe: Outside Diameter: 2 7/8"~~5" Grade: G105/ S135