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ASTM A106,A53,A179,A192,A333,A500 API 5L, API 5CT JIS G3452,G3454,G3455,G3456,G3444,G3460,G3461,G3464 DIN1629,DIN2391 EN10210,EN10025 GB/T 8163, GB/T 5310,GB/T 3087 and so on