... and located at Beijing City, the capital of China, where is the heavy industrial area with the preferential development of iron and ... is high quality with high efficiency and annual supply capacity 1.5 million ton. And there ... 11mm -59.94mm Length:5-12m,customized Standards:API 5L,API5CT,ASTM A106, ... Application: Structural using, welding, and any other constructing uesage. Low price Seamless steel pipe