... 5Length: 0.5-14m 6Origin:Tianjin,China 7Material standard: A53 GRA/B, Q195,Q215,Q235,10#,20#,45#,16Mn 8Application: Structure ... advance 11Certificate:API 5L, ISO,CE, BV, 12Standard: ASTM A53/A106, API 5L, Gr.B/DIN, BS1387, DIN2440,GB/T8163, GB ... . Please notice our detailed specification as follows: ASTM A53 GRA/B, ASTM A106 GRA/B Out DiameterThickness WeightMMINmmmmKg/m151/221.32.771.27203 ...