BS EN ISO 7369-2020 Pipework – Metal hoses and hose assemblies – Vocabulary.
This document defines current terms concerning metal hoses, metal hose assemblies and component parts.
This document applies to:
a) stripwound metal hoses and hose assemblies;
b) corrugated metal hoses and hose assemblies.
NOTE 1 These hoses can be used braided, covered or lined.
NOTE 2 Equivalent terms in English, French, German and Dutch are given In Annex A.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at
— IEC Electropedia: available at
3.1 General
3.1.1 metal hose
metal duct, generally of circular or polygonal section, able to withstand repeated bending without damage stripwound metal hose
hose manufactured from a helically wound pre-formed strip, generally with a right-hand lead, where the turns, with or without packing (, are connected together by single or double overlapping and flexibility (3.1.11) is obtained by sliding adjacent turns over each other corrugated metal hose
pressure-tight hose made from tube or from strip ( with corrugations, helicoidal or annular to the axis of the hose, made by deforming the metal, and where flexibility (3.1.11) and pliability (3.1.12) are obtained by bending of the corrugations
3.1.2 metal hose assembly
assembly of a metal hose (3U) with its end fittings (
3.1.12 pliability
capability of a metal hose (311) or tube to be bent easily for installation
3.1.13 bend radius
radius measured to the centre line of the hose
3.1.14 minimum bend radius
minimum radius at which the hose is designed to operate
3.2 Construction
3.2.1 Metal hoses (stripwound or corrugated) strip
sheet metal suitable for cold forming packing
component used to improve the leak-tightness of stripwound metal hoses ( profile
geometrical form of a hose wall when sectioned along its axis cross section
geometrical form of a hose when sectioned perpendicular to its axis nominal size of metal hose DN
alphanumeric designation of size for components of a pipework system. which is used for reference purposes
Note 1 to entry: It comprises the letters DN followed by a dimensionless whole number, which is indirectly related to the physical size, in millimetres, of the inside diameter (
Note 2 to entry: This delined number does not represent a measurable value and should not be used for calculation purposes except where specified in the relevant standard.
Note 3 to entry: The definition is adapted from ISO 6708.BS EN ISO 7369 pdf pdf download.