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QC/T 798-2025: Multi-layers plastic tubing for automotive fuel system
Status: Valid QC/T 798: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| QC/T 798-2025 | English | 439 |
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Multi-layers plastic tubing for automotive fuel system
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QC/T 798-2025
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| QC/T 798-2008 | English | 150 |
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Multilayers plastic tubing for automotive fuel system
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QC/T 798-2008
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Basic data | Standard ID | QC/T 798-2025 (QC/T798-2025) | | Description (Translated English) | Multi-layers plastic tubing for automotive fuel system | | Sector / Industry | Automobile & Vehicle Industry Standard (Recommended) | | Classification of Chinese Standard | T13 | | Classification of International Standard | 43.060.40 | | Word Count Estimation | 22,283 | | Date of Issue | 2025-05-09 | | Date of Implementation | 2025-11-01 | | Older Standard (superseded by this standard) | QC/T 798-2008 | | Issuing agency(ies) | Ministry of Industry and Information Technology of the People's Republic of China | QC/T 798-2025: Multi-layers plastic tubing for automotive fuel system---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/QCT798-2025
ICS 43.060.40CCS T 13
Automobile Industry Standards of the People's Republic of China
Released on May 9, 2025
2025-11-01Implementation
Ministry of Industry and Information Technology of the People's Republic of China issued
Multilayer plastic fuel pipe for automobiles
Multi‑layers plastic tubing for automotive fuel system
Replaces QC/T 798-2008
Table of Contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Logo 1
5 Dimensions 2
6 Technical Requirements 2
7 Test Method 4
8 Inspection Rules 15
9 Packaging, transportation and storage 16
Preface
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document replaces QC/T 798-2008 Multilayer Plastic Fuel Pipes for Automobiles. Compared with QC/T 798-2008, except for the structural adjustment and
In addition to the logical changes, the main technical changes are as follows.
--Deleted the application of pipe assemblies within the scope of this document (see Chapter 1, Chapter 1 of the.2008 edition);
--Changed the applicable temperature range of multilayer tubes (see Chapter 1, Chapter 1 of the.2008 edition);
--Added working medium (see Chapter 1);
--Added the reference and applicable instructions for bellows (see Chapter 1);
-- The definition of pipe assembly has been deleted (see Chapter 3, 3.1 of the.2008 edition);
--The definition of multilayer pipe has been changed (see Chapter 3, 3.2 of the.2008 edition);
--Added the definitions of straight-wall pipe and corrugated pipe (see Chapter 3);
-- Changed the logo (see Chapter 4, Chapter 9 of the.2008 edition);
--Changed the specifications and dimensions of multilayer tubes (see Table 1, Chapter 4 of the.2008 edition);
-- Deleted the general requirements (see Chapter 6 of the.2008 edition);
--The technical requirements have been changed (see Table 2, Table 2 of the.2008 edition);
--Changed the specimen length and quantity in the test method (see Table 2, Chapter 7 of the.2008 edition);
--The test method for appearance has been changed (see 7.2, 7.2 of the.2008 edition);
--The test method for interlayer adhesion has been changed (see 7.3, 7.11 of the.2008 edition);
-- Changed the requirements for the yield and elongation at break test fixtures (see Figure 4, Figure 5 of the.2008 edition);
--Added the test temperature for the high temperature burst test method (see 7.5.2, 7.4 of the.2008 edition);
--Added surface resistivity test (see 7.6);
--The schematic diagram of the low-temperature impact device has been changed (see Figure 6, Figure 4 of the.2008 edition);
--The low temperature impact test method has been changed (see 7.7.2, 7.7.3 of the.2008 edition);
--Added the zinc chloride resistance test for the insert mandrel end (see 7.8.2);
--Added kink resistance test (see 7.9);
--Added heat aging resistance test (see 7.10);
--The fuel resistance test has been modified (see 7.11, 7.10 of the.2008 edition);
--Added precipitation resistance test (see 7.12);
--Added chemical resistance test (see 7.13);
--The permeation resistance test has been changed (see 7.14, 7.8 of the.2008 edition);
--Changed the qualification judgment (see 8.5, 8.5 of the.2008 edition);
--The appendix has been deleted (see Appendix A of the.2008 edition).
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed and coordinated by the National Technical Committee for Standardization of Automotive Products (SAC/TC 114).
This document was drafted by. Hebei Yada Automobile Plastic Products Co., Ltd., Shanghai Yada Automobile Plastic Products Co., Ltd., Changchun Yada Automobile
Parts Manufacturing Co., Ltd., China First Automobile Group Co., Ltd., Great Wall Motor Co., Ltd., Chongqing Changan Automobile Co., Ltd.,
Chery Automobile Co., Ltd., China Automotive Research Institute Automotive Inspection Center (Tianjin) Co., Ltd., and Jilin Taiyu Technology Manufacturing Co., Ltd.
The main drafters of this document are. Xia Leiming, He Yupeng, Wang Heyang, Wang Jin, Li Hongjie, Zhao Jianming, Zhao Yan, Meng Yudan, Li Litao, Liu Mingzhi,
Yang Shuai, Lin Xiuhua, Huang Yinan, Fang Qi, Dong Zhenyang, Li Chuan, Liang Lizhu, Tang Tao, Xiao Chuiyuan, Huang Bo, Deng Dejun, Li Xuwei, Chen Hao, Feng Haibin,
Li Xiangxi and Wang Hui.
The previous versions of this document and the documents it replaces are as follows.
--First issued in.2008 as QC/T 798-2008;
--This is the first revision.
Multilayer plastic fuel pipe for automobiles
1 Scope
This document specifies the marking, size specifications, technical requirements, inspection rules,
Packaging, transportation and storage requirements, describes the test methods.
This document is applicable to the operating temperature between -40℃ and 135℃, the working medium is gasoline or gasoline steam, and the maximum working pressure does not exceed
The manufacture, inspection, sale and use of multi-layer plastic fuel pipes with a pressure exceeding 0.7 MPa.
This document is applicable to straight-wall pipes. For corrugated pipes, refer to relevant test methods depending on the specific use environment.
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to this document.
document.
GB/T 2828.1-2012 Sampling procedures for inspection by attributes Part 1.Sampling plans for batch inspection based on acceptance quality limit (AQL)
GB/T 2918-2018 Standard environment for conditioning and testing plastic specimens
GB 18352.6-2016 Light-duty vehicle pollutant emission limits and measurement methods (China Stage VI)
GB/T 19278-2018 Thermoplastic pipes, fittings and valves General terms and definitions
QC/T 797 Material identification and marking of automotive plastic parts, rubber parts and thermoplastic elastomer parts
3 Terms and Definitions
The terms and definitions defined in GB/T 19278-2018 and the following apply to this document.
3.1
multilayer pipe
The pipe wall is composed of two or more layers of different materials or structures.
[Source. GB/T 19278-2018, 2.2.4]
3.2
solid-wall pipe
Any cross section is a pipe with the same circular shape and solid wall.
[Source. GB/T 19278-2018, 2.2.2]
3.3
corrugated pipe
A tube having a series of parallel ridges and grooves.
4.Logo
The markings on the multi-layer pipes should be clear and firm and should not damage the performance of the multi-layer pipes. The markings on the multi-layer pipes should include the following information.
See Figure 1 for an example.
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