GB/T 18948-2025 English PDF

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 18948-2025	RFQ	ASK	3 days	Rubber hoses and tubing for cooling systems for automotives - Specification	Valid
GB/T 18948-2017	359	Add to Cart	4 days	Rubber hoses and tubing for cooling systems for internal-combustion engines -- Specification	Valid
GB/T 18948-2009	599	Add to Cart	3 days	Rubber hoses and tubing for cooling systems for internal-combustion engines -- Specification	Obsolete
GB/T 18948-2003	399	Add to Cart	3 days	Rubber - Coolant hoses and tubing for use on private cars and light commercial vehicles - Specification	Obsolete

Basic data

Standard ID: GB/T 18948-2025 (GB/T18948-2025)
Description (Translated English): Rubber hoses and tubing for cooling systems for automotives - Specification
Sector / Industry: National Standard (Recommended)
Date of Implementation: 2026-03-01
Older Standard (superseded by this standard): GB/T 18948-2017

GB/T 18948-2017: Rubber hoses and tubing for cooling systems for internal-combustion engines -- Specification

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Rubber hoses and tubing for cooling systems for internal-combustion engines - Specification ICS 43.040.01; 83.140.40 G42 National Standards of People's Republic of China Replacing GB/T 18948-2009 Internal combustion engine cooling system with rubber hose and pure rubber hose specification Specification (ISO 4081.2010, IDT) 2017-09-07 Posted 2018-04-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released Directory Foreword Ⅲ 1 Scope 1 2 Normative references 1 3 Categories 2 4 Size and tolerance 2 5 rubber hose and pure rubber hose performance requirements 2 6 test frequency 4 7 mark 4 Appendix A (Normative) Expansion test 6 Appendix B (Normative) Resistance to surface contamination of oil 7 Appendix C (Normative) Pressure, vibration and temperature test 8 Appendix D (informative) original equipment manufacturers (OEMs) The use of matrix diagram provides non-standard type of hose or pure hose Example 10 Appendix E (Normative) Type test 11 Appendix F (Normative) Routine test 12 Appendix G (informative) Production Acceptance Test 13

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 18948-2009 "Internal combustion engine cooling system hose and pure rubber hose specifications." And GB/T 18948- 2009 compared to the main technical changes are as follows. --- Revised bond strength [see Chapter 5 b),.2009 version 5.2]; --- Increased resistance to suction flat diameter change formula [see Chapter 5 d)]; --- Increased resistance to expansion of the perimeter or diameter of the formula for calculating the rate [see Chapter 5 f)]; --- Increasing the pressure/vibration/temperature test burst pressure changes, changes in diameter calculation [see Chapter 5 l]); --- Modify 5.1 ~ 5.12 for a) ~ l) [see Chapter 5 a) ~ l),.2009 version 5.1 ~ 5.12]. This standard uses the translation method identical with ISO 4081.2010 "internal combustion engine cooling system with rubber hose and pure hose specifications." The documents of our country that are consistent with the corresponding international documents that are normative references in this standard are as follows. --- GB/T 1690-2010 vulcanized or thermoplastic rubber liquid-resistant test methods (ISO 1817.2005, MOD) --- GB/T 2941-2006 rubber physical test sample preparation and conditioning procedures (ISO 23529.2004, IDT) --- GB/T 3512-2014 vulcanized rubber or thermoplastic rubber hot air accelerated aging and heat test (ISO 188.2011, IDT) --- GB/T 3730.2-1996 road vehicles quality vocabulary and code (idtISO 1176.1990) --- GB/T 5563-2013 Rubber and plastics hoses and hose assemblies - Hydrostatic test method (ISO 1402.2009, IDT) --- GB/T 5565-2006 Rubber or Plastics Reinforced Hose and Non-Reinforced Hose Bending Test (ISO 1746.1998, IDT) --- GB/T 5567-2013 Rubber and plastics hoses and hose assemblies Determination of vacuum resistance (ISO 7233.2006, IDT) --- GB/T 5576-1997 Rubber and latex nomenclature (idtISO 1629.1995) --- Rubber and plastics hoses and hose specifications and the maximum and minimum diameter and cutting length tolerance (ISO 1307) --- GB/T 9575-2013. 2006, IDT) --- GB/T 14905-2009 Rubber and plastics hoses - Determination of adhesive strength between layers (ISO 8033.2006, IDT) This standard made the following editorial changes. --- Delete the text "bar" units that only keep "MPa" unit said. This standard proposed by the China Petroleum and Chemical Industry Federation. This standard by the National Rubber and Rubber Products Standardization Technical Committee hose (SAC/TC35) centralized. This standard was drafted unit. Nanjing Lide Orient Rubber Technology Co., Ltd., Tianjin Ge Tesi Testing Equipment Technology Development Co., Ltd., Shenyang Rubber Research Institute Co., Ltd. The main drafters of this standard. Sun Kejian, Cai Zhixiong, Wang Shuli, Xu Xing, Zhou Feng. This standard replaces the standards previously issued as. --- GB/T 18948-2003, GB/T 18948-2009. Internal combustion engine cooling system with rubber hose and pure rubber hose specification Warning --- personnel using this standard should be familiar with regular laboratory procedures. This standard is not intended to involve the use of this standard may arise All security issues. It is the user's responsibility to establish a corresponding safety and health system and to ensure compliance with national regulations.

1 Scope

This standard specifies the self-contained vehicles containing 3.5t or less internal combustion engine (see the provisions of ISO 1176) with 1,2-ethanediol as a coolant Requirements for direct or pre-formed hoses or pure hoses for pressurized or pressure-fed cold circulation systems. This standard can be used as a classification method to make the original equipment The manufacturer (OEM) may make a detailed marking of the dedicated tests that do not include the specified major types (see Appendix D for examples). At this In such cases, the hose or pure rubber hose does not have any indication of the standard number of the mark, but according to OEM parts drawings detailed identification Do not mark.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 5564-2006 rubber and plastic hose low temperature deflection test (ISO 4672.1997, IDT) GB/T 24134-2009 Rubber and plastic hoses - Evaluation of resistance to ozone under static conditions (ISO 7326.2006, IDT) ISO 188 Vulcanized rubber or thermoplastic rubber - accelerated aging or heat resistance test (Rubber, vulcanizedorthermoplastic- Acceleratedageingandheatresistancetests) ISO 1176 Road Vehicles Quality Glossary and Codes (Roadvehicles-Masses-Vocabulary and codes) ISO 1307 Rubber and Plastic Hose Hose Specifications and Maximum and Minimum Inner Diameter and Cut Length Tolerances (Rubberandplasticsho- ses-Hosesizes, minimumandmaximuminsidediameters, andtolerancesoncut-to-lengthhoses) ISO 1402 Rubber and plastics hoses and hose assemblies - Hydrostatic test method (Rubberandplasticshosesandhose assemblies-Hydrostatictesting) ISO 1629 Rubber and latex nomenclature (Rubberandlatices-Nomenclature) ISO 1746 Rubber or Plastics Reinforced Hoses and Non-Reinforced Hose Bending Tests (Rubberorplasticshosesandtubing- Bendingtests) ISO 1817 vulcanized or thermoplastic rubber liquid-resistant test methods (Rubber, vulcanized-Determinationofthe effectofliquids) ISO 6162-1 Hydraulic fluid transmission belts - Split or integral flanges and flanged fittings for metric or inch bolts - Part 1. For 3.5MPa to 35MPa pressure, DN13 to DN127 flange fittings (Hydraulicfluidpower-Flangecon- nectorswithsplitorone-pieceflangeclampsandmetricorinchscrews-Part 1.Flangeconnectorsfor useatpressuresof3.5MPato35MPa, DN13toDN127) ISO 7233 Rubber and plastics hoses and hose assemblies - Determination of vacuum resistance (Rubberandplasticshosesand hoseassemblies-Determinationofresistancetovacuum) ISO 8033 Rubber and plastics hoses - Determination of adhesive strength between layers (Rubberandplasticshoses-Determination ofadhesionbetweencomponents ......

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