BS ISO 15501-1:2016 pdf download.Road vehicles — Compressed natural gas (CNG) fuel systems — Part 1: Safety requirements
1 Scope
This document specifies the minimum safety requirements applicable for the functionality of CNG on-board fuel systems intended for use on the types of motor vehicles defined in ISO 3833. This document is applicable to vehicles using compressed natural gas in accordance with ISO 15403, including mono-fuel, bi-fuel or dual-fuel applications, original-production and converted vehicles.
All matters relating to the skills of installers and converters have been excluded from this document.
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 11439, Gas cylinders — High pressure cylinders for the on-board storage of natural gas as a fuel for automotive vehicles
ISO 14469 (all parts), Road vehicles — Compressed natural gas (CNG) refuelling connector
ISO 15500 (all parts), Road vehicles — Compressed natural gas (CNG) fuel system components
ISO 15501-2, Road vehicles — Compressed natural gas (CNG) fuel systems — Part 2: Test methods
IEC 60079-10-1, Explosive atmospheres — Part 10-1: Classification of areas — Explosive gas atmospheres
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 1176, ISO 15500-1 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1 service pressure
settled pressure of 20 MPa (200 bar) at a uniform gas temperature of 15 °C
3.2 CNG on-board fuel system
compressed natural gas fuel system comprising cylinder, or cylinders according to ISO 11439, mounting,one or more refuelling receptacles according to ISO 14469 (all parts), and the components described in ISO 15500-3 to ISO 15500-20
4.1 Design
4.1.1 General
The CNG on-board fuel system components shall comply with ISO 11439, ISO 14469 (all parts) and ISO 15500 (all parts), as applicable. For bi-fuel vehicles, provision shall be made to avoid accelerated deterioration of the non-CNG fuel system as a result of sustained operation on natural gas. Such measures shall be as recommended by the original vehicle manufacturer (e.g. fuel hoses). All fuel system components shall fulfill the following conditions. a) They shall withstand the environmental temperatures and other environmental conditions safely during their operational life. b) They shall be located with full regard for anticipated damage while the vehicle is being used safely. Such damage may be caused by the vehicle itself, by extraneous factors such as heat, road debris, automotive fluids (brake liquid, oil, petrol, cooling liquid, etc.), or by rust, etc. c) They shall be fitted so that they are not the outermost, highest or lowest parts of the vehicles; otherwise they shall be protected. d) They shall be fitted so as not to affect ground clearance, approach angle, ramp (break-over) angle or departure angles as defined by the vehicle manufacturer. e) They shall be located so that they will not suffer corrosion damage by accumulation of water or cargo chemicals. f) They shall ensure the proper electrical conductivity throughout the fuel system in order to avoid the electrostatic charges. This provision does not apply to gas-tight housing and ventilation hose.
BS ISO 15501-1:2016 pdf download
