... House Standard: GB/T6725-2008, ASTM A500, EN 10219, EN10210 Steel Grade: Q195-Q345, 500B/C, S235JR, S355JR, S355J2H WidthHeightW/T ... √√√√√√ 100150 √√√√√√√ 100200 √√√√√√√√ 100300 √√√√√√√ 150250 √√√√√√√ 200300 √√√√√√√ 200400 √√√√√√√ 300500 √√√√√√√√ 300600 √√√√√√√ 400600 √√√√√√√√400700 √√√√√√√√ Rectangular Steel Pipe