name :seamless steel tube Standard: ASTM,GB,API Thickness: 3 - 60mm 1Goods: Carbon Steel Seamless Pipe ... -1/2,3,4,5,6,7,8,9,10,11,12,14,16 4Thickness(mm):0.2-40mm ... China 7Material standard: A53/A106 GRA/B, Q195,Q215,Q235,10#,20#,45#,16Mn 8Application: Structure, gas and oil, petroleum, ... T/T or L/C 11Certificate:API 5L, ISO,CE, BV, 12Standard: ASTM A53/A106, API 5L, Gr.B/DIN, BS1387, DIN2440,GB/T8163 ...