BS EN 754-7:2016
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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 | 2016 | 20 |
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:
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cold drawn tube produced by the porthole/bridge method ( EN 754‑8 ),
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tubes delivered in coils ( EN 13958 ),
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coiled tubes cut to length ( EN 13958 ).
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PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | Contents Page |
| 5 | European foreword |
| 6 | 1 Scope Figure 1 — Round tube Figure 2 — Circumscribing circle for other than round tube |
| 7 | 2 Normative references 3 Tolerances on dimensions 3.1 General 3.2 Diameter – Round tube |
| 8 | Table 1 — Tolerances on diameter for round tube 3.3 Width, depth or width across flats – squares, rectangles, hexagons, octagons |
| 9 | Table 2 — Tolerances on width, depth or width across flats 3.4 Wall thickness variation (eccentricity) |
| 10 | Table 3 — Tolerances on wall thickness variation (eccentricity) 3.5 Length Table 4 — Tolerances on fixed length |
| 11 | 3.6 Squareness of cut ends 4 Tolerances on form 4.1 General 4.2 Straightness Figure 3 — Measurement of the deviation from straightness |
| 12 | Table 5 — Straightness tolerances 4.3 Convexity-Concavity Figure 4 — Measurement of convexity – concavity |
| 13 | Table 6 — Convexity – concavity tolerances 4.4 Twist Figure 5 — Measurement of twist |
| 14 | Table 7 — Twist tolerances 4.5 Angularity Figure 6 — Measurement of deviation from square |
| 15 | 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 |
| 16 | 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 |
| 17 | A.2.3 Wall thickness variation for tubes specified as OD × ID |
| 18 | Bibliography |
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BS EN 754-7:2016 – TC:2020 Edition
Tracked Changes. Aluminium and aluminium alloys. Cold drawn rod/bar and tube – Seamless tubes, tolerances…
