This International Standard specifies the technical conditions for delivery of seamless tubes with plain ends, manufactured from the grades of steel shown in table 2, with precision dimensional tolerances and in those dimensions shown in table 9 which have been selected from IS0 4200.

　　Tubes in accordance with this International Standard are used mainly for purposes where importance attaches to dimensional accuracy and, if required, small thicknesses and surface finish.

　　If such tubes are intended for use in hydraulic piping equip-ment, they shall be used only in the annealed or normalized delivery condition.

　　1985年 ISO 3304：1985 光端精密無(wú)縫鋼管 交貨技術(shù)條件

　　1975年 ISO 3304：1975 平頭無(wú)縫精密鋼管 交貨技術(shù)條件