1、A. E. C. M. A. STAN DAR D NORME A.E.C.M.A. A.E,C.M.A. NORM Edition approved for publication Comments should be sent within six months after the date of Dubiication decision prEN2621 Issue P 1 May 1986 C6 Chairman DIT PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATRIEL AROSPATIAL 88, boulevard Ma
2、lesherbes, 75008 PARIS -TL. 45-63-82-85 UDC : Key words : ENGLISH VERSION Aerospace series Circular structural tubes seamless, in low alloy steel 4 1000 -73 +6 O O +4 + 10 O O I Dd50 D50 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECM
3、ANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Issue P1 prEN2621 Page 7 3.5 Geometric tolerances 3.5.1 Concentricity The deviation from concentricity shall be contained within the tolerances on thicknesses given in table 3. 3.5.2 Circularity The deviation from ci
4、rcularity is the difference between maximum and minimum diameters at the same section. It shall be contained within the tolerances on external diameter given in table 2. 3.5.3 Straightness For tubes supplied in straight lengths the deviation from straightnessshall not exceed 1,7 mm in 1000 mm (see figure 2). 1,7 mrn 1 1000 rnrn Figure 2 4 Designation See EN2600. Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
