Webiste:http://www.dlp-oileqpt.com/ Email:email@example.com About us With API 5CT oil casing and API 5L oil line pipe as the main products,with production and sales integration, professional domestic and foreign trade operations, strength financial , rich experience. Products: Oil Casing, Tubing, Line Pipe, Seamless Steel Pipe, Steel Pipe(ASTM/API/ASME/DN/BS/JIS/EN),Alloy Seamless Steel Pipe. Performing Standard:API-5CT API-5L ASTM- A106-Gr.B ASTM- A53 DIN BS JIS EN. Size of oil Tubing: 1.315"-4 1/2" Ends: NUE/EUE. Size of oil Casing: 4 1/2" -20"Ends Connection: STC/LTC/BTC, Premium Connections. We can manufacture all kinds of Pup Joint of Tubing and Casing, Coupling with Left type and Right type. Steel Grade(Materials):H40,J55,K55,N80,L80,C-90,C95,T95,P110,Q125,13Cr-80,13Cr-110,Super 13Cr.