BS ISO 2929:2021 pdf download – Rubber hoses and hose assemblies for bulk fuel delivery by truck — Specification.
1 Scope This document specifies the requirements for two groups of rubber hoses and rubber hose assemblies for loading and discharge of liquid hydrocarbon fuels with a maximum working pressure of 1,0 MPa (10 bar). Both groups of hoses are designed for a) use with hydrocarbon fuels having an aromatic-hydrocarbon content not exceeding 50 % by volume and containing up to 15 % of oxygenated compounds, and b) operation within the temperature range of −30 °C to +70 °C, undamaged by climatic conditions of −50 °C to +70 °C when stored in static conditions. NOTE Hoses for use at temperatures lower than −30 °C can be the subject of discussion between manufacturer and end user. This document is not applicable to hoses and hose assemblies for LPG systems, aviation fuel systems, fuel station systems or marine applications. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 37, Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties ISO 188, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests ISO 1402, Rubber and plastics hoses and hose assemblies — Hydrostatic testing ISO 1817:2015, Rubber, vulcanized or thermoplastic — Determination of the effect of liquids ISO 4649:2017, Rubber, vulcanized or thermoplastic — Determination of abrasion resistance using a rotating cylindrical drum device ISO 4671, Rubber and plastics hoses and hose assemblies — Methods of measurement of the dimensions of hoses and the lengths of hose assemblies ISO 7233, Rubber and plastics hoses and hose assemblies — Determination of resistance to vacuum ISO 7326:2016, Rubber and plastics hoses — Assessment of ozone resistance under static conditions
6.2 Concentricity When determined in accordance with ISO 4671 , the concentricity, based on a total indicator reading between the internal diameter and the outside surface of the cover, shall be no greater than 1,0 mm for hoses of nominal bore up to and including 76, and no greater than 1,5 mm for hoses of nominal bore greater than 76. 6.3 Tolerance on length When measured in accordance with ISO 4671 , the length of a hose or hose assembly shall be within ± 1 % of the required length. 6.4 Minimum thickness of lining and cover When measured in accordance with ISO 4671 , the minimum thickness of the lining of all hoses shall be 1,5 mm. For hoses of nominal bore up to and including 50, the minimum thickness of the cover shall be 1,5 mm. For hoses of nominal bore greater than 50, the minimum thickness of the cover shall be 2,0 mm.