... pipes forliquid serviceGB/T8163-199910, 20, Q295, Q345ASTM A53-98 ASTM A192 ASME S192 JIS G3452-1998 FIS G3454-1998 ... low and Medium Pressure BoilersGB3087-199910, 20ASTM A179, ASTM A192 ASTM SA179,SA192,BS3059Seamless Steel Tubes for high pressure --Chemical ... Q345, Q390, 10MoVNb, 12CrMo, 15CrMo, 12Cr2MoISO 9329-2-1997 ASTM A161-94Seamless steel tubesfor petroleum crackingGB9948-8610, 20, 12CrMo, ...