Hereby we introduce our company production as Below: manufacturer and exporter of API pipes1) ERW, Seamless API 5CT pipes usable for oil well pipes, OD:from 1.9" to 20".2) ERW,Seamless and SSAW line pipe for oil and gas industry Specification: Performing Standard:API-5CT API-5L ASTM- A106-Gr.B ASTM- A53 DIN BS JIS EN. Size of oil Tubing: 1.9"-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 Ype and Right Ype. SteelGrade(Materials):H40,J55,K55,N80,L80,C-90,C95,T95,P110,Q125,13Cr-80,13Cr-110,Super 13Cr. Line Pipes: Size:1/2"(21.3mm)-40"(1016mm) Steel Grade(Materials):Gr.B,X42.X46.X52.X60.X65.X70.X80.X100 WT:SCH10SCH20,SCH30,SCHTD,SHC40,SCH60,XS,SCH80,SCH100,SCH120,SCH140,SCH160,XXS If you have any inquiries about that please send us, We will promised you can receive best service from our side and please remember our Motto is Trustable BusinessI await for your inquiry.Best regardsJane Ding