本欧洲标准规定了圆形铝和铝合金孔径挤出和冷拉管的尺寸和形式的公差，外径（OD）超过2 mm，直径为50 mm，线圈形式为直线长度，材料:见图1。 本欧洲标准主要适用于1xxx系列铝和​​3xxx系列合金制造的一般工程应用的圆形冷拉管。对于非标准化1xxx铝和3xxx合金或其他系列的合金，例如， 5xxx或6xxx，供应商和买方之间达成协议。 本欧洲标准仅适用于: - 圆管通过舷孔/桥梁法以螺旋形式挤出，然后冷拉至所需的最终尺寸; - 如上所述，但是从卷绕材料切割成直线。 本欧洲标准不适用于: - 无缝挤出（模具/心轴法）和拉制管（EN 754-7）; - 以直的长度（即不卷曲）挤出并拉伸的管（EN 754-8）

This European Standard specifies the tolerances on dimensions and form of round aluminium and aluminium alloys porthole extruded and cold drawn tubes with an outside diameter (OD) of over 2 mm up to and including 50 mm supplied in coil form or in straight lengths cut from coiled material: see Figure 1. This European Standard mainly applies to round cold drawn tube for general engineering applications manufactured in 1xxx series of aluminium and 3xxx series of alloys. The use of this European Standard for non-standardised 1xxx aluminium and 3xxx alloys or alloys from other series, e.g. 5xxx or 6xxx, is subject to agreement between supplier and purchaser. This European Standard only applies to: - round tube extruded by the porthole/bridge method in coil form and then cold drawn to the final dimensions required; - tube as above but delivered in straight lengths cut from coiled material. This European Standard does not apply to: - seamless extruded (die/mandrel method) and drawn tubes (EN 754-7); - tubes extruded in straight lengths (i.e. not coiled) and drawn (EN 754-8).