... , STPG370, STPG410 etc..SurfaceSatiny and Smooth, Oiled or Not, black painted, black varnish, 3PE coating, FBE coating, Bare, varnished, zinc coating, anti-corrosion, 3PE ... petroleum and natural gas industries,for use as casing and tubing for wells, screwed and socketed steel tubes and tubulars and for plain end steel tubes suitable for welding or for screwsing ...