Introduce :
Standard: GB 5310-1995,GB 3087-1999,GB/T 3089-1982,DIN 1629/3,DIN 17175,ASTM A106-2006,ASTM A53-2007,ASTM A335-2006,API 5CT,API 5L,GB,DIN,ASTM,API
Grade: 10#,20#,45#,16Mn,A53(A,B),A335 P5,API K55,St52,Q235,Q345,10#-45#,A53-A369,API J55-API P110,ST35-ST52,Q195-Q345
Location:
China