PRA©标准的欧洲风格©enne专业化©cifie的陀©腐臭的形状和圆形管的尺寸，S A©游行 的2和毫米之间毫米50具有直径室外©笑（OD）桥，铝和合金DA€™铝 包括，提供冠或在直线长度切割盖©©ES在冠部。参见图1。 PRA©标准的欧洲风格©enne萨€™主要适用于管注定游行©小号©■用途 MA© - 机械GA©NA©啰音，制造©生活水平©1XXX和3XXX里斯的合金。它在€™铝不适用 ©标准化生活©RIE的3XXX系列©入住1种XXX的一张©S非标准化的合金或合金大€™等生活©里斯 （例如5XXX或6XXX）在供应商和购买者€™之间的协议进行。 PRA©标准的欧洲风格©enne萨€™仅适用于: - 在线圈供给至最终尺寸圆管游行©S A桥（上体育界在桥或孔口） 需要; - 遵守在PRA©凯德©管板布管，但在冠的直线长度切盖交付©©上课。 PRA©标准的欧洲风格©enne萨€™不适用: - 对运动扇区/心轴（EN 755-7）无缝管游行©S; - 游行©S IN直线长度，而不是在线圈管（EN 755-8）

This European Standard specifies the tolerances on dimensions and form of round aluminium and aluminium alloys porthole extruded 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 extruded 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 produced by the porthole/bridge method, extruded in coil form 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) tubes (EN 755-7);  tubes extruded in straight lengths (i.e. not coiled) (EN 755-8).