BS EN 754-7:2016 – TC:2020 Edition
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Tracked Changes. Aluminium and aluminium alloys. Cold drawn rod/bar and tube – Seamless tubes, tolerances on dimensions and form
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 40 |
This European Standard specifies the tolerances on dimensions and form for aluminium and aluminium alloys cold drawn seamless tubes with an outside diameter (OD) from 3 mm to 350 mm (round tube, see Figure 1) or with a cross section contained within a circumscribing circle (CD) from 8 mm to 300 mm (other than round tube, see Figure 2) supplied in straight lengths. This European Standard only applies to tube produced by the seamless die/mandrel method of extrusion (and then cold drawn to the final dimensions required). The temper designations used in this part are according to EN 515. This document applies to cold drawn, seamless tube for general engineering applications. This document does not apply to: – cold drawn tube produced by the porthole/bridge method (EN 754-8), – tubes delivered in coils (EN 13958), – coiled tubes cut to length (EN 13958). (…)
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 24 | Contents Page |
| 25 | European foreword |
| 26 | 1 Scope Figure 1 — Round tube Figure 2 — Circumscribing circle for other than round tube |
| 27 | 2 Normative references 3 Tolerances on dimensions 3.1 General 3.2 Diameter – Round tube |
| 28 | Table 1 — Tolerances on diameter for round tube 3.3 Width, depth or width across flats – squares, rectangles, hexagons, octagons |
| 29 | Table 2 — Tolerances on width, depth or width across flats 3.4 Wall thickness variation (eccentricity) |
| 30 | Table 3 — Tolerances on wall thickness variation (eccentricity) 3.5 Length Table 4 — Tolerances on fixed length |
| 31 | 3.6 Squareness of cut ends 4 Tolerances on form 4.1 General 4.2 Straightness Figure 3 — Measurement of the deviation from straightness |
| 32 | Table 5 — Straightness tolerances 4.3 Convexity-Concavity Figure 4 — Measurement of convexity – concavity |
| 33 | Table 6 — Convexity – concavity tolerances 4.4 Twist Figure 5 — Measurement of twist |
| 34 | Table 7 — Twist tolerances 4.5 Angularity Figure 6 — Measurement of deviation from square |
| 35 | Table 8 — Squareness tolerances for square and rectangular tubes 4.6 Corner and fillet radii 4.7 Depth of dents for round tube Table 9 — Depth of dents tolerances for round tube |
| 36 | Annex A (informative) Wall thickness variation (eccentricity) A.1 General A.2 Specifying round tube sizes and tolerances A.2.1 General Figure A.1 — Minimum and maximum values of the tube wall thickness A.2.2 Wall thickness variation for tubes specified as OD × t or ID × t |
| 37 | A.2.3 Wall thickness variation for tubes specified as OD × ID |
| 38 | Bibliography |
