GB/T 20734-2006Mounting requirements for liquefied natural gas vehicle special equipment (English PDF)

Foreword

The Annex A in this Standard is normative.

This Standard was proposed by and shall be under the jurisdiction of National Technical

Committee of Auto Standardization.

Drafting organizations of this Standard. Natural Gas Application Technology Development

Department of Zhongyuan Petroleum Exploration Bureau, China Automotive Technology

& Research Center, and Shanghai Jiao Tong University.

Main drafters of this Standard. Zhang Xiaobo, Zhang Kongming, Ye Yong, Xie Ting, Wang

Xuhui, and Li Weijing.

National Technical Committee of Auto Standardization is responsible for the interpretation

of this Standard.

Mounting requirements for

liquefied natural gas vehicle special equipment

1 Scope

This Standard specifies technical requirements for installation, inspection and others of

liquefied natural gas vehicle special equipment.

This Standard applies to automobiles using liquefied natural gas vehicle special

equipment.

2 Normative references

The articles contained in the following documents have become part of this document

when they are quoted herein. For the dated documents so quoted, all subsequent

modifications (including all corrections) or revisions made thereafter do not apply to this

Standard. However, the parties who reach an agreement according to this Standard are

encouraged to study whether the latest versions of these documents may be used. For

the undated documents so quoted, the latest versions (including all modification sheets)

apply to this document.

GB 7258 Safety specifications for power-driven vehicles operating on roads

GB/T 17676 Natural gas vehicle and liquefied petroleum gas vehicle Identification

marks

3 Terms and definitions

Terms and definitions defined in GB/T 17895 AND the following terms and definitions

apply to this Standard.

3.1

Liquefied natural gas

A colourless fluid under liquid situation. It is mainly composed of methane, and its

composition may include small amounts of ethane, propane, nitrogen or other

components usually existed in natural gas.

4 Installation

5 Protection

Appropriate protective measures shall be taken for different system components

depending on their installation location. It can use the protective structure of the car body,

and also can install the fence, bumper, partitions, shields, etc. to directly prevent the

damage of direct mechanical impact or pavement gravel.

6 Inspection

7 Blowing and cleaning of pipeline system

After the installation of pipeline system, blowing and cleaning shall be done to the pipeline

in accordance with relevant provisions of GB 50235.

8 Mark

The mark of LNG automobile shall comply with provisions of GB/T 17676.

Annex A

(Normative)

Pipeline pressure test

A.1 Pressure test must be done to vehicle's LNG gas cylinder before it leaves the factory,

and there shall have test report. Therefore, if not necessary, the LNG gas cylinder may be

excluded from the pressure test of vehicle LNG special equipment.

A.2 Pipeline pressure test includes strength test and leak test, which shall be carried out in

accordance with relevant provisions of GB 50235.The pipeline strength test is usually

carried out in the new vehicle's type test. If there is no special requirement in normal

production of vehicles, it may be exempted.

A.3 It may adopt any of the following methods to do pipeline leak test.

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