API 5L X65 steel pipe 1) Standard:API 5L,ASTM 36.10M,A106,A53,DIN 1629,1626 ... ,BS,JIS.etc 2) Material: ASTM A106/A53,ST37,35, API 5L ... X65 steel pipeSize1/4-26inchWall thickness1.8mm-30mmStandardAPI5L,API5CT,ASTMA53,SY5037-2000,GB/T9711.1-1997,MaterialX42,X52,X60 ... are made under the ISO9001-2000 strictly API 5L X65 steel pipe