BS EN ISO 7369-2020 Pipework – Metal hoses and hose assemblies – Vocabulary

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 https://www.iso.org/obp — IEC Electropedia: available at http://www.elcctropcdia.org/ 3.1 General 3.1.1 metal hose metal duct, generally of circular or polygonal section, able to withstand repeated bending without damage 3.1.1.1 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 (3.2.1.2), are connected together by single or double overlapping and flexibility (3.1.11) is obtained by sliding adjacent turns over each other 3.1.1.2 corrugated metal hose pressure-tight hose made from tube or from strip (3.2.1.1) 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 (3.2.2.4) 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) 3.2.1.1 strip sheet metal suitable for cold forming 3.2.1.2 packing component used to improve the leak-tightness of stripwound metal hoses (3.1.1.1) 3.2.1.3 profile geometrical form of a hose wall when sectioned along its axis 3.2.1.4 cross section geometrical form of a hose when sectioned perpendicular to its axis 3.2.1.5 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 (3.2.1.6). Note 2 to entry: This delined number does not represent a measurable...