What is BS EN 13957 - Aluminium and aluminium alloy extruded round, coiled tube about?
BS EN 13957 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 straight lengths cut from coiled material.
BS EN 13957 mainly applies to round extruded tubes for general engineering applications manufactured in a 1xxx series of aluminium and 3xxx series of alloys. The use of BS EN 13957 for non-standardised 1xxx aluminium and 3xxx alloys or alloys from other series, e.g. 5xxx or 6xxx, are subject to agreement between supplier and purchaser. BS EN 13957 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
BS EN 13957 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)
Who is BS EN 13957 - Aluminium and aluminium alloy extruded round, coiled tube for?
BS EN 13957 on aluminium and aluminium alloys is relevant to:
- Manufacturer of aluminium and aluminium alloy extruded round, coiled tube
Why should you use BS EN 13957- Aluminium and aluminium alloy extruded round, coiled tube?
Porthole extruded tubes are commonly referred to as “structural” or porthole tubing. The aluminum association describes these tubes as: “a tube produced by extrusion of a solid billet through a porthole die. BS EN 13957 provide guidance on production and manufacturing processes, quality control, chemical composition limits, mechanical properties, surface quality, coil characteristics, tolerances on dimensions.
With the guidance of BS EN 13957, you can efficiently manufacture high-quality aluminium and aluminium alloy extruded round coiled tubes. With BS EN 13957 you can be ensured that the products consistently meet and exceed quality assurance targets. BS EN 13957 exemplifies the required chemical, mechanical properties that help you achieve precision in terms of product functionality and specification. BS EN 13957 provides you with comprehensive information useful throughout the process of production.
What’s changed since the last update?
BS EN 13957:2008 supersedes BS EN 13957:2003 which is withdrawn. The following editorial modifications have been introduced during the revision:
- The contents, text and tables have been changed to bring BS EN 13957 in line with EN 755
The following technical modifications have been introduced during the revision:
- Clause 1 has been amended to make clear the products covered by BS EN 13957 and those which are not. In addition, the list of the most commonly used general engineering alloys is replaced by a reference to the alloy group only.
- Clauses 3 and 4 including Tables: the text and the tables are updated.
- Annex A (informative) has been added to provide further explanation of wall thickness variation (eccentricity) along with some examples.
