... ,DIN2448,DIN17175,DIN2460, ASTM A106,A53,A179,A192,A252,A500, JIS G3444,G3445,G3454,G3456,G3461Q345,ST35.8,ST37,ST42,ST52,A53 ... .B-X52,J55,K55 (4) Usage: oil and gas transmission, pipe, pier, Civil Engineering, building works etc. We also supply the ...