... -2000,GB/T9711.1-1997.material Q235A,Q235b,Q345,L245(GR.B),L290(X42),X52,X60,X80.Applications range used for ... of 6500 square meters,located in hebei province MengCunXian the new hope zone.Is a professional steel tube factory manufacturer, has ... six ssaw pipe production line,and new increase two erw production line in 2011. another we supply ...