The implemental standards for the oil casings are API 5CT; the specifications include from 60.3 to 508mm; the steel grades include J55, K55, N80, L-80, P-110, C-90, C - 95, T-95 and so on; the merchantable claspers areSTC , LTC, BTC . The implemental standards for the oil pipelines are API 5L; the specifications include from 219.1 to 2032mm; the steel grades include Gr.B, X42, X46,X56,X60,X70,X80 and so on At the same time we also supply a large number of seamless steel pipes in different uses, such as fluid pipes and structural pipes. Besides that, we have many years of co-operation ships with Tianjin Large Seamless Company, Baogang Steel Pipe Company, Anshan Steel Pipe Company, which make sure our abundant resources. If you have any needs,hope you feel free to contact us! Contact:Bonnie Xu Email:BonneXu@dlpoctg.com WeChat:13602055205 Skype:BonnieXu22 Tel:+86-13602055205