oval hollow section/oval steel pipe 1.outer diameter:219.1 ... 3.lenth:3mtr-18mtr oval steel pipe/oval hollow section standard:GB13793 material:Q195 Q235 oval steel pipe/oval ... originalchinapipe main used in: construction,fence,structural tube,window section and other parts Executive StandardGB-T228-2002Steel gradeQ195,Q195L, ... Asia ,Africa,Middle East,North America oval hollow section ( oval steel pipe)