... 2002, GB/T 14976-2002, GB 13296-91 b) ASTM A213, ASTM A312, ASTM A269, JIS G3459, JIS G3463, JIS G3448, DIN174585 ... 20MnG, 25MnG, 15MoG, 20MoG, 12Cr1MoVG, 15CrMoVG, 12Cr2MoG, 12Cr2MoWVTiB, 12Cr3MoVSiTiB,ASTM A106-96a ATSM A213-95a JIS G3461-1988 JIS G3462-1998 ... Tubesfor low and Medium Pressure BoilersGB3087-199910, 20ASTM A179, ASTM A192 ASTM SA179,SA192, BS3059Seamless Steel Tubes for high pressure -- ...