GB11614-2022
Flat glass
平板玻璃
GB 11614-2022 is a current mandatory Chinese national standard for Flat glass. It appears in the Electronics compliance cluster with a product safety focus and has an implementation date of Aug 1, 2023.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
GB 11614-2022 applies to sodium calcium silicate flat glass with a thickness of not less than 2mm, produced by various manufacturing processes. It covers both clear transparent flat glass and body-tinted flat glass used in construction, information technology, photovoltaics, transportation, and home appliances. This standard does not apply to patterned glass or wired glass. Manufacturers producing flat glass for the Chinese market must ensure compliance with this mandatory national standard, which replaces the previous GB 11614-2009 version.
Technical requirements
The standard classifies flat glass into two color categories (clear transparent and body-tinted) and two quality grades (ordinary grade and premium processing grade). Key technical requirements include dimensional deviation limits for length and width based on thickness ranges, with diagonal difference not exceeding 0.2% of the average diagonal length. Thickness specifications cover 12 standard thicknesses from 2mm to 25mm, with strict thickness deviation and thickness wedge tolerances. Products outside standard thickness specifications require explicit contractual agreements for non-construction applications such as information technology, photovoltaics, and transportation. Appearance quality requirements define limits for point defects (bubbles, inclusions, spots), defect density, lines, scratches, cracks, optical distortion (measured by zebra angle), and edge defects. The premium processing grade has significantly stricter tolerances, including the prohibition of light distortion spots. A new requirement for bloom has been introduced, applicable only to premium processing grade float glass, requiring no bloom phenomenon after specified heat treatment. Optical performance requirements specify minimum visible light transmittance values for clear glass based on thickness, and transmission ratio deviation limits for body-tinted glass. Color uniformity requirements apply to body-tinted glass, with color difference (ΔE*ab) limits of 1.5 for ordinary grade and 1.0 for premium processing grade.
Testing methods
Dimensional deviations are measured using metal rulers (GB/T 9056) or steel tapes (QB/T 2443-2011). Thickness is measured at 5 points using digital micrometers (GB/T 1216) with 0.001mm precision. Appearance quality inspection utilizes reading microscopes (JB/T 2369) for defect measurement, with specific observation setups using black screens and fluorescent lighting for line and scratch detection. Optical distortion is evaluated using a striped screen at 4.5m distance, measuring the incident angle at which distortion disappears. The new bloom test involves heat treatment at 730°C±5°C for duration determined by glass thickness, followed by cooling and visual inspection in a specialized observation box. Optical performance testing follows GB/T 2680 for transmittance measurements, and color uniformity is measured per GB/T 11942 using L*a*b* color space comparison.
FAQs
What are the key changes in GB 11614-2022 compared to the 2009 version?
GB 11614-2022 introduces several significant changes: addition of bloom definition and requirements, reclassification from three grades (qualified, first-class, premium) to two grades (ordinary and premium processing), modified thickness deviation and thickness wedge tolerances, updated point defect limits, revised optical distortion requirements, and modified transmission ratio deviation and color uniformity requirements for body-tinted glass.
Does GB 11614-2022 apply to all types of flat glass?
No, GB 11614-2022 specifically applies to sodium calcium silicate flat glass with thickness ≥2mm. It explicitly excludes patterned glass and wired glass. For non-construction applications requiring special thicknesses outside the 12 standard specifications, manufacturers must establish explicit contractual agreements with customers.
What is the bloom test requirement in GB 11614-2022?
The bloom test is a new requirement applicable only to premium processing grade float glass. Samples of 100mm × 100mm are heat-treated at 730°C±5°C for a duration determined by glass thickness, then cooled and visually inspected in a specialized observation box. The glass must show no bloom phenomenon after testing. This test detects tin-side surface defects that become visible as interference colors after heat treatment.
The summary above provides a high-level overview of GB 11614-2022. To ensure complete compliance for your flat glass products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 11614-2022 today to access all detailed parameter tables, testing procedures, and acceptance criteria needed for your compliance certification and quality control processes.
Applicability hints
- Type
- Product
- CCS
- Q33
- ICS
- 81.040.20
- Competent department
- Ministry of Industry and Information Technology
- Technical committee
- Ministry of Industry and Information Technology
Relationships
Replaces:GB 11614-2009