{"id":8428,"date":"2026-09-29T14:00:41","date_gmt":"2026-09-29T06:00:41","guid":{"rendered":"https:\/\/www.air-tester.com\/?p=8428"},"modified":"2026-09-29T15:59:53","modified_gmt":"2026-09-29T07:59:53","slug":"ye-leng-qi-mi-xing-jian-ce","status":"publish","type":"post","link":"https:\/\/www.air-tester.com\/en\/ye-leng-qi-mi-xing-jian-ce.html\/","title":{"rendered":"Liquid-Cooled Leak Testing: With the National Standard Set to Take Effect in 2026, How Should Companies Establish a Mass Production Quality Inspection System?"},"content":{"rendered":"
\n

In 2026, China\u2019s standard system for liquid-cooled data centers underwent a significant upgrade\u2014GB\/T 48023-2026 and GB\/T 48097-2026 were successively issued, YD\/T 7105-2026 will officially take effect on November 1, 2026. However, as these standards establish only a technical framework, specific test pressures and permissible leakage rates must still be determined on a case-by-case basis in accordance with product design specifications and customer requirements.<\/p>\n<\/blockquote>\n\n\n\n

Therefore, there is no universal \u201cNational Standard Leakage Rate Values<\/strong>\" can be applied directly.<\/p>\n\n\n\n

I. Why Is a Leak Test Required for Liquid-Cooled Systems?<\/h2>\n\n\n\n

The most fundamental difference between liquid cooling and air cooling is:There really is liquid flowing through the system.<\/strong><\/p>\n\n\n\n

If leaks occur in critical components such as liquid-cooled plates, piping, quick-connect fittings, or CDUs, the consequences go beyond mere product defects\u2014if the liquid comes into contact with any part of the PCB, connectors, or power supply system, it could cause equipment failure or even data center downtime. This is not a mere quality issue; rather, it isSystem-Level Reliability Risks<\/strong>The<\/p>\n\n\n\n

\"Liquid-cooled
Liquid-cooled systems must undergo airtightness testing.<\/em><\/figcaption><\/figure>\n\n\n\n

Therefore, the real question the liquid cooling industry needs to answer is not \u201cCan you guarantee that the seal won't leak?<\/strong>\", rather:<\/p>\n\n\n\n

How to reliably and quickly detect micro-leaks at every stage of R&D validation, incoming material inspection, process control, and final inspection before shipment.<\/strong><\/p>\n\n\n\n

II. An Overview of the Liquid-Cooling Standards System in 2026<\/h2>\n\n\n\n

The year 2026 marks a key milestone in the standardization process for liquid cooling in China. The table below summarizes the core standards that have been published to date:<\/p>\n\n\n\n

Standard Number<\/th>Name<\/th>Publication Date<\/th>Implementation Date<\/th>Nature<\/th><\/tr><\/thead>
YD\/T 6049-2024<\/strong><\/td>Technical Requirements and Test Methods for Cold-Plate Liquid-Cooled Full-Rack Servers<\/td>2024<\/td>February 1, 2025<\/strong><\/td>Industry Recommendations<\/td><\/tr>
YD\/T 7105-2026<\/strong><\/td>Test Methods for Cold-Plate Liquid-Cooled Data Centers<\/td>July 15, 2026<\/td>November 1, 2026<\/strong><\/td>Industry Recommendations<\/td><\/tr>
GB\/T 48023-2026<\/strong><\/td>Technical Specifications for Cold Plate Liquid Cooling Systems in Data Centers<\/td>July 30, 2026<\/td>February 1, 2027<\/strong><\/td>Nationally Recommended<\/td><\/tr>
GB\/T 48097-2026<\/strong><\/td>General Specifications for Cold Plate Liquid-Cooled Cabinets in Data Centers<\/td>August 28, 2026<\/td>March 1, 2027<\/strong><\/td>Nationally Recommended<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

The emergence of this series of standards signifies that liquid cooling is moving away from \u201cExploration Phase of Emerging Technologies<\/strong>\"Enter\"\"The Scale-Up Quality Control Phase\"<\/strong>The<\/p>\n\n\n\n

Of particular note is YD\/T 7105-2026\u2014it not only specifies technical requirements but also defines a systematic framework for equipment testing, acceptance testing, and operations and maintenance testing. In the future, when customers conduct acceptance testing of liquid-cooling systems, they willTesting Methods, Data Recording, and Quality Traceability<\/strong>The requirements will only become more specific.<\/p>\n\n\n\n

III. What Exactly Are Liquid-Cooled Products Tested For?<\/h2>\n\n\n\n

A liquid-cooling system is not a single cold plate, but rather a complete fluid circuit. The key testing points for different components vary:<\/p>\n\n\n\n

Liquid-cooled plate<\/h3>\n\n\n\n

On the surface, it appears to be \"Metal Plate + Flow Channel + Fitting<\/strong>\", which actually contains multiple structures, including microchannels, brazed areas, sealed areas, and fluid inlet and outlet ports. The main risk points identified during inspection are concentrated inIncomplete welds, sand holes, open flow channel defects, and leaks at seals and end faces<\/strong>The<\/p>\n\n\n\n

Liquid-cooling lines<\/h3>\n\n\n\n

The combination of bent tubes, welds, and fittings is a high-risk area. Batch inspection of copper tube assemblies demands a fast cycle time, requiring an inspection solution thatSpeed and Accuracy<\/strong>Find a reasonable balance between the two.<\/p>\n\n\n\n

Quick-Connect Fittings and the CDU<\/h3>\n\n\n\n

Quick-connect fittings are the components in liquid-cooling systems that are plugged and unplugged most frequently, while the CDU serves as the core heat exchange unit. The requirements for sealing reliability for both are often more stringent than those for static components.<\/p>\n\n\n\n

......<\/p>\n\n\n\n

IV. How to Choose a Testing Method? A Comparison of Four Approaches<\/h2>\n\n\n\n
Detection Methods<\/th>Working Principle<\/th>Core Advantages<\/th>Scenario<\/th><\/tr><\/thead>
direct pressure<\/strong><\/td>Observe the rate at which the internal pressure of the product decreases after inflation<\/td>Simple, efficient, and low-cost<\/td>Batch Screening of Standard Liquid-Cooling Tubes and Copper Tube Assemblies<\/td><\/tr>
differential pressure<\/strong><\/td>The standard chamber and the product under test are pressurized simultaneously to compare changes in the pressure difference.<\/td>High resistance to interference and high repeatability<\/td>High-Precision Inspection of Liquid-Cooled Plates and Precision Structural Components<\/td><\/tr>
flow rate method<\/strong><\/td>Measure the gas flow rate passing through the leak point per unit time<\/td>Quantifiable leakage<\/td>Flow-based products such as breath valves, capillary tubes, and waterproof breathable membranes<\/td><\/tr>
Helium Mass Spectrometry Leak Detection<\/strong><\/td>Helium Tracing, Detection of Helium Ion Concentration by Mass Spectrometry<\/td>Extremely high sensitivity, capable of locating leak points<\/td>High-end liquid-cooled products with extreme sealing requirements<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

differential pressure<\/strong>This deserves a separate explanation. Its logic is similar to that of an electronic balance:A standard reference chamber is placed on one side and the product under test on the other; pressure is applied to both sides simultaneously, and a leak is detected by comparing the pressure difference between the two sides.<\/strong>. External disturbances, such as fluctuations in ambient temperature and air supply, have a synchronous offsetting effect on both sides; therefore,Its repeatability is far superior to that of the direct compression method.<\/strong>, suitable for liquid-cooled plate products that require strict consistency.<\/p>\n\n\n\n

\"Animation
Animated Diagram Illustrating the Principle of Differential Pressure-Based Airtightness Testing<\/em><\/figcaption><\/figure>\n\n\n\n

A Combined Strategy of Gas and Helium Testing<\/h3>\n\n\n\n

For liquid-cooled products that require extremely high reliability, a more cost-effective approach is toLayered Detection<\/strong>::The front-end leak testing process quickly screens out major, medium, and routine micro-leaks, while the back-end uses helium mass spectrometry to perform high-sensitivity verification on products with extremely small leaks.<\/strong>. This combination is more efficient than relying solely on helium testing for all products, and it is also more in line with the realities of cost control in mass production.<\/p>\n\n\n\n

V. Why Are Leak Test Results Unstable? The Real Challenge Isn\u2019t the Instrument<\/h2>\n\n\n\n

Many engineers buyairtightness leak detector<\/a>It was later discovered that while the instrument itself was functioning properly, the test results showed significant fluctuations. The real cause often lies not with the instrument, but with various components of the entire testing system:<\/p>\n\n\n\n

Air Leak in Workwear<\/strong>This is the most common pitfall. The product itself meets the standards, butA failure in the fixture's seal led to a false positive.<\/strong>The<\/p>\n\n\n\n

Effects of Temperature<\/strong>This should not be overlooked either. There is a temperature difference between a freshly processed product and room temperature,Inflation pressure varies as the temperature stabilizes.<\/strong>The<\/p>\n\n\n\n

Insufficient inflation and balancing time<\/strong>, resulting in internal pressure within the product that is stillIf readings are taken before a uniform and stable state is reached, the data will naturally be distorted.<\/strong>The<\/p>\n\n\n\n

Elastic Deformation of the Product<\/strong>This is particularly evident in continuous monitoring\u2014After repeated inflation and deflation, slight changes in the product\u2019s shape affect the chamber volume, which in turn affects the reproducibility of the results.<\/strong>The<\/p>\n\n\n\n

Therefore, what liquid-cooled airtightness testing should truly establish isA Complete Testing System<\/strong>...and not just an instrument with sufficient accuracy.<\/p>\n\n\n\n

VI. Jingcheng Engineering's Airtightness Testing Solution: From Instruments to Mass Production Systems<\/h2>\n\n\n\n

Shenzhen Jingchenggongke Technology Co., Ltd.<\/a>(Abbreviation: JCGK Jingcheng Engineering) has established supply partnerships with numerous leading companies in the liquid cooling industry and has become the preferred brand in the gas analysis sector. Its core strength lies not in the specifications of individual instruments, but in its ability to focus onProduct design, test pressure, allowable leakage rate, production line cycle time, and automation requirements<\/strong>... providing complete solutions ranging from instruments to tooling to system integration.<\/p>\n\n\n\n

JC-C10005<\/a> Differential Pressure Airtightness Tester<\/a><\/h3>\n\n\n\n

For products such as liquid-cooled plates and precision structural components that require high repeatability,JC-C10005<\/a> The series utilizes the principle of differential pressure detection, comparing the measured product with a standard chamber to effectively suppress environmental interference, making it suitable forHigh-Precision Micro-Leak Detection<\/strong>and scenarios involving stable production line operations.<\/p>\n\n\n\n

\"Differential<\/a>
Precision Engineering JC-C10005<\/a> Differential Pressure Airtightness Tester<\/a><\/em><\/figcaption><\/figure>\n\n\n\n

Phased Mass Production Plan<\/h3>\n\n\n\n

Depending on production capacity, Jingcheng Engineering offers the following configuration options:<\/p>\n\n\n\n

Research and Development and Small-Volume Production Phases<\/strong>--Single-playerairtightness meter<\/a> + Quick-Release Clamp<\/strong>, flexibly responding to product iteration needs.<\/p>\n\n\n\n

Medium-Volume Production Phase<\/strong>--Dual-Channel\/Multi-Channel Leak Testing + Multi-Station Fixture<\/strong>, The test pressure can be customized according to product specifications (e.g., typical configuration for liquid-cooled copper tube assemblies: 200 kPa, 30-second test cycle), significantly increasing the number of tests per unit of time.<\/p>\n\n\n\n

Mass Production Phase<\/strong>--Airtightness Tester<\/a> + Custom Tooling + Robotic Arms + PLC + MES\u2014Fully Integrated<\/strong>...enabling integrated automatic loading and unloading, automatic inspection, OK\/NG sorting, data logging, and quality traceability, and fully complying with the requirements of YD\/T 7105-2026 regarding test data logging and the acceptance system.<\/p>\n\n\n\n

VII. How Should Internal Testing Standards Be Established?<\/h2>\n\n\n\n

When implementing a testing solution, engineers should not just ask, \u201cWhat is the value in Pa specified by the national standard?<\/strong>\", but should instead establish their ownProduct Testing Specifications Matrix<\/strong>::<\/p>\n\n\n\n

Project<\/th>Points to Clarify<\/th><\/tr><\/thead>
Product Type<\/td>Liquid-cooled plates \/ Liquid-cooled tubes \/ CDU \/ Quick-connect fittings, etc.<\/td><\/tr>
work pressure<\/td>Product Design Specifications<\/td><\/tr>
Leak Test Pressure<\/td>Determined based on the design pressure and technical specifications<\/td><\/tr>
Permissible Leakage Rate<\/td>Pa \/ mL\/min \/ sccm<\/td><\/tr>
Inflation and Balancing Time<\/td>Verified through actual testing, rather than based on empirical estimates<\/td><\/tr>
detection time<\/td>Working backward from the production line cycle time<\/td><\/tr>
Tooling Solution<\/td>Product-Specific Sealing Fixture<\/td><\/tr>
Data Integration<\/td>Local Storage \/ MES \/ Barcode Traceability<\/td><\/tr>
Periodic Calibration<\/td>Inspection Intervals for Instruments and Standard Components<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Please note the following:Standard Pressure Test<\/strong>(Focus on Structural Safety Under Load)<\/em>together withMass-Production Airtightness Testing<\/strong>(Focus on leak screening and quality control)<\/em>These are two tests with different purposes; they should not be conflated, nor can they be used as direct substitutes for one another.<\/p>\n\n\n\n

Conclusion<\/h2>\n\n\n\n

In the liquid cooling industry in 2026, the standards framework is rapidly taking shape, but standards are only the beginning.<\/p>\n\n\n\n

True competitiveness lies in transforming standards into a reliable, mass-production testing capability.<\/strong> The reliability of the seals on every liquid-cooling plate, every pipe, and every fitting must be consistently verified at every stage\u2014from R&D and incoming materials to manufacturing and final inspection.<\/p>\n\n\n\n

JCGK<\/strong>Focusing on testing methods such as direct pressure, differential pressure, flow, and helium leak detection, and combining custom fixtures, multi-channel equipment, and automation integration,We have helped numerous leading liquid-cooling companies establish a comprehensive airtightness testing system covering everything from R&D validation to 100% inspection during mass production.<\/strong>The<\/p>\n\n\n\n

In the era of large-scale liquid cooling, having a testing system that is implementable, traceable, and capable of continuous optimization is, in itself, one of the most critical competitive advantages for manufacturing companies.<\/p>\n\n\n\n

Original Statement<\/strong>: This article was written byShenzhen Jingchenggongke Technology Co., Ltd.<\/a>Written by the technical team, reproduced with attribution.<\/em>Data sources<\/strong>: Precision Engineering internal test data and customer cases.<\/em><\/em><\/em><\/p>","protected":false},"excerpt":{"rendered":"

This article outlines the key points of airtightness testing for liquid-cooled data centers: The new national standard set to take effect in 2026 only establishes a framework, with leakage rates to be determined by the product manufacturer; it compares the applicable scenarios for four testing methods\u2014direct pressure, differential pressure, flow rate, and helium leak testing; it points out that fluctuations in results are often due to system factors such as test fixtures and temperature rather than the instruments themselves; It emphasizes that companies should establish their own testing specification matrices to translate standards into stable, traceable mass-production testing capabilities.<\/p>","protected":false},"author":1,"featured_media":8430,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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