Welcome to website of SZTSP where you get reliable steel pipe for your project. OCTG-casing pipe ERW O.D. : 5 1/2"-13 3/8" ( 139.7-339.7mm); W.T.: 0.203"-0.5" (5.2-11.1mm); Length: R3; Pipe End: P/E / T&C (STC, LC, BTC, XC) Grade: H40, J55; Standard: API 5CT OCTG-line pipe ERW O.D. : 5 9/16"-12 3/4"(141.3-323.9mm); W.T.: 0.203"-0.5" (5.2-11.1mm); Length: 10-12m; End Finish:P/E Grade:PSL1,PSL2,B,X42,X46,X52,X56,X60,X65,X70; Standard: API 5L