Dear Sir Madam,Standard:BS 1387,API 5L,JIS G3454-2007,BS EN10219,BS 1139,ASTM A53-2007,BS EN10025,ASTM A106-2006,DIN EN 10025,GB T 3091-2001,JIS G3444-2006,DIN 2444,JIS G3455-2005,JIS G3464-2006,BS EN 39Grade:Q235,A53(A,B),20#,Q195,16Mn,Q215,Q345Section Shape:RoundApplication:Structure Pipe Technique:ERW