Standard:ASTM,BS,DIN Grade Group:Q195-Q345,ST35-ST52,A53-A369,API J55-API P110,10#-45# Thickness:0.2 - 30 mm Section Shape:Square Secondary Or Not:Non-secondary Application:Structure Pipe Technique:ERW Certification:API Surface Treatment:black painting, galvanised,3PE Special Pipe:API Pipe Alloy Or Not:Non-alloy