BS EN 755-7:2016
$102.76
Aluminium and aluminium alloys. Extruded rod/bar, tube and profiles – Seamless tubes, tolerances on dimensions and form
| Published By | Publication Date | Number of Pages |
| BSI | 2016 | 22 |
This European Standard specifies the tolerances on dimensions and form for aluminium and aluminium alloy extruded seamless tubes with an outside diameter ( OD) from 8 mm to 450 mm (round tube, see Figure 1) or with a cross section contained within a circumscribing circle ( CD) from 10 mm to 350 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. This standard applies to extruded seamless tube for general engineering applications only.
The temper designations used in this part are according to EN 515 .
This European Standard does not apply to:
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extruded tubes produced by porthole/bridge method ( EN 755‑8 ),
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tubes delivered in coils ( EN 13957 ),
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coiled tubes cut to length ( EN 13957 ).
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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 Alloy groups Table 1 — Alloy groups 4 Tolerances on dimensions 4.1 General 4.2 Diameter – Round tube |
| 8 | Table 2 — Tolerances on diameter for round tube 4.3 Width, depth or width across flats – squares, rectangles, hexagons, octagons |
| 9 | Table 3 — Tolerances on width, depth or width across flats 4.4 Wall thickness variation (eccentricity) |
| 10 | Table 4 — Tolerances on wall thickness variation (eccentricity) for round tubes Table 5 — Tolerances on wall thickness for other than round tubes 4.5 Length |
| 11 | Table 6 — Tolerances on fixed length 4.6 Squareness of cut ends 5 Tolerances on form 5.1 General 5.2 Straightness |
| 12 | Figure 3 — Measurement of the deviation from straightness Table 7 — Straightness tolerances of round tube 5.3 Convexity-Concavity |
| 13 | Figure 4 — Measurement of convexity–concavity Table 8 — Convexity-Concavity tolerances 5.4 Twist |
| 14 | Figure 5 — Measurement of twist Table 9 — Twist tolerances 5.5 Angularity |
| 15 | Figure 6 — Measurement of deviation from square Table 10 — Squareness tolerances for square and rectangular tubes 5.6 Corner and fillet radii Table 11 — Maximum allowable corner and fillet radii |
| 16 | Table 12 — Maximum allowable deviation from specified corner and fillet radii 5.7 Depth of dents for round tube |
| 17 | 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 |
| 18 | A.2.3 Wall thickness variation for tubes specified as OD × ID |
| 19 | Bibliography |
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BS EN 755-7:2016 – TC:2020 Edition
Tracked Changes. Aluminium and aluminium alloys. Extruded rod/bar, tube and profiles – Seamless tubes, tolerances…
