Standard No.:	GB/T 19842-2005
English Name:	Air-conditioning units for railbound vehicles
Chinese Name:	轨道车辆空调机组
Chinese Classification:	J73    Refrigeration equipment
Professional Classification:	GB    National Standard
Source Content Issued by:	AQSIQ; SAC
Issued on:	2005-7-11
Implemented on:	2006-1-1
Status:	superseded
Superseded by:	GB/T 19842-2025 Air-conditioning units for railbound vehicles
Superseded on:	2026-5-1
Target Language:	English
File Format:	PDF
Word Count:	10000 words
Translation Price(USD):	300.0
Delivery:	via email in 1~3 business day

GB/T 19842-2005 Safety property requirements and test method for fuel tanks of motorcycles and mopeds 1 Scope This document specifies the safety property requirements and test methods for fuel tanks of motorcycles and mopeds, and the relevant requirements for the installation of fuel tanks on motorcycles. This document is applicable to the metallic and non-metallic fuel tanks for motorcycles and mopeds (hereinafter referred to as "motorcycles"). 2 Normative references No normative references are listed in this document. 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 fuel tank independent tank assembly fixed to a motorcycle for storage of fuel 3.2 leakage of fuel linear falling of fuel from the fuel tank or dropping from the fuel tank 3.3 rated capacity capacity of fuel to be filled specified in the design parameters of fuel tank 3.4 fuel weight loss weight change of fuel stored in the fuel tank caused by diffusion in the prescribed safety property test of fuel tank 3.5 dump stop valve device to prevent fuel from overflowing when a motorcycle is dumped 3.6 fuel tank attachment parts and components mounted on the fuel tank Note: Examples are fuel tank cap, fuel level sensor, fuel pump, dump stop valve, oil/gas separator or oil line, etc., excluding canisters. 3.7 fuel supply system system consisting of fuel tank and fuel tank attachment 3.8 automatic compensating pressure device device for automatically compensating the working pressure or safety pressure of the fuel tank Note: Examples are vent valve, safety valve, etc. 3.9 working pressure of the fuel tank pressure above the liquid level in the fuel tank under normal service conditions of motorcycles 4 Safety property requirements for fuel tanks 4.1 The fuel tank shall be made of metallic or non-metallic materials. The fuel tank and its adjacent parts shall be designed in a structure or style that generate no electrostatic charge, so as to avoid sparks between the fuel tank and the frame. 4.2 The fuel tank shall be corrosion resistant. 4.3 The fuel tank shall be subjected to pressure test according to 5.1. The test pressure shall be a higher value of twice the working pressure of the fuel tank or the relative pressure of 30 kPa. The fuel tank and fuel tank attachment shall not break or leak but permanent deformation is allowed to the fuel tank. 4.4 The fuel tank shall have an automatic compensating pressure device to automatically release any additional pressure or pressure exceeding the working pressure of the fuel tank. The automatic compensating pressure device shall be designed in such a construction or pattern that any ignition hazard is eliminated. 4.5 Fuel shall not flow out of the fuel tank cap or any device installed to release excessive pressure. Carry out the test according to 5.2. After calculating the total leakage of fuel at all angles, its average shall not exceed 30 g/min. During the flipping process, drips are not counted. 4.6 The fuel tank cap shall have the function of preventing fuel from overflowing from the refueling port and excessive evaporation of fuel. Any of the following methods may be used. a) Use a non-removable fuel tank cap that opens and closes automatically. b) Any measure that has the same effect to prevent the loss of the fuel tank cap, including but not limited to a pull-strap fuel tank cap, a chain fuel tank cap, or a fuel tank cap sharing the same key with the ignition. If a fuel tank cap sharing the same key with the ignition is used, the key can only be pulled out from the fuel tank cap when the cap is locked. c) The design structure of the fuel tank has measures to prevent excessive evaporation and overflow of fuel caused by the loss of the fuel tank cap. 4.7 Non-metallic fuel tanks shall also meet the following special safety property requirements. a) Conduct permeability test according to 5.3.1. After the pre-storage period at 40°C±2°C, conduct the permeability test in a stable environment to measure the fuel weight loss caused by diffusion, which shall not be more than 20 g/24 h on average. If the weight loss exceeds this specified value, conduct another test at the ambient temperature of 23°C±2°C and all other conditions remain unchanged. The fuel weight loss measured at this ambient temperature shall not exceed 10 g/24 h. b) Conduct impact test according to 5.3.2. There shall be no less than 3 impact test points in the same fuel tank, and the liquid will not leak within 60 s after the impact test. c) Conduct mechanical strength test according to 5.3.3. Any deformation of the fuel tank will not affect its normal use. d) Conduct fuel resistance test according to 5.3.4. The difference between the tensile strength of the fuel tank that has undergone the permeability test and the tensile strength of the new fuel tank shall not exceed 25%. e) Conduct fire prevention test according to 5.3.5. The flame burning rate of the fuel tank shall not exceed 0.64 mm/s. f) Conduct high temperature test according to 5.3.6. After the test, the fuel tank shall be free of obvious plastic deformation or leakage, and it can be used normally.

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Safety property requirements for fuel tanks 5 Safety property test methods for fuel tanks 6 Requirements for installation of fuel tank on motorcycles 7 Implementation of this standard Annex A (Normative) Test methods for fire prevention Bibliography