GB/T 18948-2017

This standard specifies the requirements for straight or preformed hoses or pure rubber hoses used in the pressurization or pressure relief cooling systems of internal combustion engines in vehicles with a gross weight of less than 3.5 tons (as specified in ISO 1176), where 1,2-ethylene glycol is used as the coolant. This standard can be used as a classification method, enabling original equipment manufacturers (OEMs) to provide detailed markings for specialized tests not included in the specified main types (see the example in Appendix D). In such cases, the hoses or pure rubber hoses do not bear any markings indicating the standard number, but should be labeled with the identification marks detailed in the OEM's parts drawings.