BS EN 755-7:2016

What is BS EN 755-7 - Seamless tubes about?

BS EN 755 is a series of European standards on aluminium and aluminium alloys that discusses the best procedures and specifications required for manufacturing high-quality extruded seamless tubes. BS EN 755-7 is the seventh part of a series of documents on aluminium and aluminium alloys. BS EN 755-7 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 or with a cross-section contained within a circumscribing circle (CD) from 10 mm to 350 mm (other than a round tube, supplied in straight lengths.

BS EN 755-7 only applies to tubes produced by the seamless die/mandrel method of extrusion. BS EN 755-7 applies to extruded seamless tubes for general engineering applications only.

The temper designations used in this part are according to EN 515.

BS EN 755-7 does not apply to:

• Extruded tubes produced by porthole/bridge method (EN 755-8)
• Tubes delivered in coils (EN 13957)
• Coiled tubes cut to length (EN 13957)

Who is BS EN 755-7 - Seamless tubes for?

BS EN 755-7 on aluminium and aluminium alloy is relevant to:

• Manufacturer of aluminium and aluminium alloys extruded seamless tubes

Why should you use BS EN 755-7- Seamless tubes?

A seamless tube is a tube that does not have any welding seam. The seamless tube will ideally be a solid metal tube with each end connected to another tube without having any welding joint. These tubes have threads either at one end or at both ends and can be threaded to the end of another hollow tube or pipe.

BS EN 755-7 provide guidance on tolerances on dimensions, diameter - round tube, width, depth or width across flats - squares, rectangles, hexagons, octagons, wall thickness variation (eccentricity), straightness, convexity-concavity, twist, angularity, corner and fillet radii, depth of dents for round tube.

BS EN 755-7 exemplifies the required tolerances on dimensions that help you achieve precision in terms of product functionality and specification.

As a user of BS EN 755-7, you can be ensured of the dimensions of aluminium and aluminium alloys seamless tubes. With obedience and compliance to BS EN 755-7, you can efficiently manufacture high-quality precise aluminium and aluminium alloys extruded seamless tubes. BS EN 755-7 helps you to build consumer trust and confidence in the product. With BS EN 755-7 you can be ensured that the products consistently meet and exceed quality assurance targets. BS EN 755-7 provides you with comprehensive information useful throughout the process of production.