GB15763.2 Portable Building Safety Glass Stress Tester

NegotiableUpdate on 05/06

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Nature of the Manufacturer: Producers

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Overview

The portable stress meter accurately detects the surface stress of fire-resistant glass, ensuring compliance with the GB/T15763.1-2025 standard, preventing the risk of self explosion, and ensuring building safety. Suitable for various types of fire-resistant glass, quality control throughout production and maintenance GB15763.2 portable building safety glass stress gauge

Product Details

GB15763.2 Portable Building Safety Glass Stress TesterTechnical Specification

1、 Standard core association and scope of application

The full name of GB15763.2 is "Safety Glass for Building Use Part 2: Tempered Glass", and the current effective version is GB/T15763.2-2025. It will be officially implemented on August 1, 2026, replacing the old version GB15763.2-2005. This standard specifies the quality requirements, testing methods, and inspection rules for tempered glass used in construction. Surface stress testing is the core mandatory indicator, and portable building safety glass stress gauges, as key equipment for on-site testing, must strictly adapt to the technical requirements of the standard to ensure that the testing data is compliant and effective.

Applicable scenarios cover the production sampling, construction site acceptance, and safety inspection of tempered glass in buildings. It is compatible with various substrates such as soda lime glass and borosilicate glass, and is also suitable for stress testing of special process tempered glass such as flat, curved, and edge processing (polishing, drilling). For non building tempered glass (such as automotive and household appliances), this standard and instrument operation specifications can be used for testing.

2、 Core technical requirements for portable stress gauges in accordance with standards

GB15763.2 便携式建筑安全玻璃应力仪

（1） Accuracy and measurement range requirements

GB/T15763.2-2025, combined with the international standard ISO 1288-5:2023, tightens the uncertainty of stress measurement on the surface of tempered glass to within ± 5 MPa (the old version was ± 10 MPa), and portable stress gauges need to meet this core indicator. The measuring range of the instrument should cover the conventional stress range of tempered glass, with a lower limit of surface compressive stress measurement not exceeding 1.0 MPa. The minimum thickness of the measurable glass should be ≥ 1mm, and the detection depth should be ≥ 5mm to ensure accurate detection of both thin and thick tempered glass.

For curved tempered glass, the standard has added requirements for stress co detection. The instrument needs to have curvature compensation function and be suitable for curved components with a curvature radius greater than 300mm. The stress measurement deviation in the edge area should be controlled within ± 6.5 MPa to solve the problem of insufficient detection accuracy for irregular glass.

（2） Test method and environmental adaptability

The instrument shall comply with GB/T18144 "Methods for Testing Glass Stress", and the mainstream method is dynamic laser polarization scattering, which replaces the traditional photoelastic method to achieve synchronous measurement of surface stress and thickness direction stress distribution. The measurement time shall be controlled within 1~6 seconds, taking into account both laboratory accuracy and on-site rapid detection requirements. To address the issue of stress concentration in edge machined parts, it is necessary to have the ability to capture local micro zone stress and avoid detection blind spots.

Environmental adaptability needs to match the working conditions of the construction site, maintain detection accuracy in the temperature range of 10-50 ℃ and humidity conditions of 0-90% RH (non condensing), and have the ability to resist slight vibration and electromagnetic interference, ensuring stable operation of equipment in complex outdoor environments.

3、 Operating specifications and compliance points for portable stress gauges

（1） Basic operation process

Pre calibration: Before testing, instrument calibration must be completed according to standard requirements, using standard glass samples traced by CNAS for calibration. The calibration cycle should not exceed 6 months, and calibration records should be kept for future reference.
Sample pretreatment: Clean the glass surface stains and water stains to avoid affecting laser penetration and polarization signal recognition; For curved and edge machined parts, it is necessary to adjust the angle of the measuring head, fit it to the glass surface, and fix the position.
Testing implementation: Select the effective area of the glass (avoiding edge damage and scratch areas), start the measurement according to the instrument operating procedures, select at least 3 different points for testing on each piece of glass, take the average as the final result, and synchronously record the testing environmental parameters (temperature, humidity).
Data determination: According to the requirements of GB/T15763.2-2025, combined with indicators such as glass bending strength and fragment state, when the surface compressive stress is unqualified or the stress distribution is uneven, it is necessary to mark and further investigate the cause.

（2） Key points of compliance assurance

1. Instrument selection: Priority should be given to selecting equipment that meets the requirements of GB/T18144 and this standard, and has a metrological certification certificate, to avoid using instruments with insufficient accuracy or uncalibrated, and to ensure that the testing data has legal validity.

2. Personnel qualifications: Operators need to be familiar with standard terms and instrument principles, undergo professional training before taking up their posts, master special scene (curved surfaces, edge machined parts) detection skills, and avoid operational errors.

3. Data traceability: Establish testing archives to record instrument models, calibration status, testing data, environmental parameters, and other information, and retain them for at least 1 year to meet quality supervision and traceability requirements.

4、 Common problems and solutions

Large fluctuations in detection data: mostly due to poor cleaning of the glass surface or loose fitting of the measuring head, requiring re cleaning of the surface, adjustment of the measuring head angle, and ensuring stable contact; When the ambient temperature exceeds the adaptation range, it is necessary to wait for the ambient temperature to stabilize before testing.
Deviation detection for curved glass: Check if the curvature compensation function is turned on. If it is not turned on, activate the corresponding mode; When the curvature radius is smaller than the instrument's adaptation range, it is necessary to replace the dedicated curved surface measurement accessory or use a desktop instrument for supplementary testing.
Edge stress cannot be captured: Adjust the micro area detection mode of the instrument, focus on the edge processing area, avoid damaged parts, and if necessary, reduce the distance between measurement points to improve the accuracy of local stress capture.
GB15763.2 Portable Building Safety Glass Stress Tester