BS ISO 2929-2021 pdf free download – Rubber hoses and hose assemblies for bulk fuel delivery by truck — Specification.
This document specifies the requirements for two groups of rubber hoses and rubber hose assembliesfor loading and discharge of liquid hydrocarbon fuels with a maximum working pressure of1,0 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
-5o C to +70C when stored in static conditions.
NOTE Hoses for use at temperatures lower than -30 C can be the subject of discussion betweenmanufacturer 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.
2Normative references
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references,only the edition cited applies. Forundated 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 testsISO 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 arotating cylindrical drum device
ISO 4671, Rubber and plastics hoses and hose assemblies —Methods of measurement of the dimensions ofhoses and the lengths of hose assemblies
ISo 7233,Rubber and plastics hoses and hose assemblies — Determination of resistance to vacuumISo 7326:2016,Rubber and plastics hoses —Assessment of ozone resistance under static conditions
ISO 8031,Rubber and plastics hoses and hose assemblies — Determination of electrical resistance andconductivity
ISO 8033,Rubber and plastics hoses —Determination of adhesion between components
6 Dimensions
6.1 Nominal bore, internal diameter, outside diameter and their tolerances, servicereeling diameter and minimum bend radius
When measured in accordance with ISO 4671 , the internal diameter and outside diameter and theirtolerances shall conform to the values specified in Table 1.
When determined in accordance with ISO 10619-1, the value of the minimum bend radius shall conformto the values specified in Table 1.
6.2Concentricity
When determined in accordance with ISO 4671 , the concentricity, based on a total indicator readingbetween the internal diameter and the outside surface of the cover, shall be no greater than 1,0 mmfor hoses of nominal bore up to and including 76, and no greater than 1,5 mm for hoses of nominal boregreater than 76.
6.3Tolerance on length
When measured in accordance with ISO 4671 , the length of a hose or hose assembly shall bewithin ± 1 % of the required length.
6.4Minimum thickness of lining and cover
When measured in accordance with ISO 4671 , the minimum thickness of the lining of all hosesshall 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.
7 Physical properties
7.1 Rubber compounds
When determined by the methods listed in Table 2, the physical properties of the compounds used for the lining and cover shall conform to the values specified in Table 2.BS ISO 2929 pdf download.