... 3.Usage:liquid or drilling pipe or structure Seamless steel pipe/seamless pipe/steel tube(1)Surface treatment:coated black, anti-rust ... A53,API-5L,API5CT,GB/T8163,GB/T8162.(3)Steel grade:Q235,Q345,STEEL ROUND PIPE SIZE-OD IN INCH N MM ... high temperature resistant and good low temperature corrosion resistanceFlexibility good,Protective performance is good,Resistant to shock,Easy installation, The lowest ...