API 5L /ASTM A106 GR.B Carbon Steel Pipe Standard:API 5L,ASTM A106/A53, Size:OD 1/4"-48", WT ... supply high quality SEAMLESS STEEL PIPES API 5L/ ASTM A106, GR.BStandardASTM A106/ASTM A 53 API 5L,GB/T8163-1999,DIN 1626, ... JIS G3462.We also can supply Other standard:API 5L, API SPEC5CT,ASTM A106,ASTM A 53,ASTM A210,ASTM A213, ... 20#,35#,45#,ST35.4,ST37.4,ST52, A105,A106,A210,A179,A192,Q195,Q235,Q215 Size 1/4 ...