High Precision Petrochemical industry Studded Tubes NPS 4'' 114.3mm: Tube ends are square cut, free burrs, internally dried and air blown clean, externally coated with varnish at both ends of extruded bimetallic fin tube.
DIN 17175 St35.8.I or P235GH TC1 welded Stud pipe for Furnace: Tube ends are square cut, free burrs, internally dried and air blown clean, externally coated with varnish at both ends of extruded bimetallic fin tube.
SA335 P11 / P22 / P91 Chemical industry Stud Tubes / Tubing NPS 4'' 114.3mm: Tube ends are square cut, free burrs, internally dried and air blown clean, externally coated with varnish at both ends of extruded bimetallic fin tube.