Steel pipe The main specification of wire rod in our factory is as follows: Seamless pipe, straight weld tubing, galvanized pipe 1.Seamless pipe: Size: ª)10mm-ª)630mm Material: 10# - 45# q345 a, b, c, d 27simn 40cr 40crmn 20crmn 30mn Executive standard: gb8162 (structural pipe) gb8163 (fluid pipe) gb3087-99 (boiler pipe) gb5310-95 ( boiler pipe for high pressure) gb6479-2000 (fertilizer special pipe) gb9948-88 (petroleum cracked pipe) din17175-95 (german standard) st45.8111 sa106b etc, foreign standard. 2.Straight weld tubing, galvanized pipe; Size: ª)10mm-ª)630mm Material: q195-q235 16mn q345 a, b 3.Welding square pipe/rectangular tube, galvanized square and Rectangular pipe. Size: ª)12mm-ª)400mm Material: q195-q235 4.Screw seam two submerged-arc welding pipe Size: ª)159mm-ª)2200mm Material: q235b q345b