Glass Windows and Doors for Metro Platform Screen Doors

In the rapidly expanding world of urban rail transit, platform screen doors have become an indispensable safety and operational feature in metro systems worldwide. These full-height or half-height glass barriers, installed at the edge of railway platforms, separate the passenger waiting area from the track zone. At the heart of every platform screen door system lies a critical component that ensures passenger safety, visual transparency, and long-term durability: the glass panels.

This article explores the applications, technical specifications, and customization options for glass used in metro platform screen doors, with a special recommendation for Shandong Yaohua Glass as a premier supplier.

Applications of Glass in Metro Platform Screen Doors

Platform screen doors, also known as platform edge doors or safety doors, serve multiple essential functions in modern metro systems.

Passenger safety is the primary purpose. The glass barriers prevent accidental falls from the platform onto the tracks, protect passengers from the piston effect of approaching trains, and reduce the risk of suicide attempts. The glass must be strong enough to withstand significant impact forces while remaining transparent for clear visibility of train arrivals and departures.

Operational efficiency is another key function. Platform screen doors open and close in synchronization with train doors, and their closure can serve as a signal for train departure. The glass panels must endure millions of opening and closing cycles over their service life without degradation. Current industry standard CJ/T 236-2022 requires platform screen doors to pass 1 million cycle tests along with 12 other safety tests.

Environmental control is equally important. The glass barriers isolate the platform from tunnel environments, blocking piston wind, dust, and noise while preventing the loss of station air conditioning. This significantly reduces energy consumption and creates a more comfortable waiting environment for passengers.

Aesthetic and visual transparency are also critical. The glass panels allow passengers to see approaching trains clearly, while the overall system contributes to a modern, open, and spacious station atmosphere. Fixed panels can be as wide as 2.5 meters, making station spaces feel more open and allowing better visibility for advertising displays.

Glass Types and Technical Specifications

Based on industry standards CJ/T 236-2022, JGJ113, JGJ102, GB15763, and GB/T 46749-2025, the following glass types and specifications are widely adopted for metro platform screen doors.

Tempered glass, also called toughened glass, is the foundational safety material. Heat-strengthened to be four to five times stronger than ordinary annealed glass, tempered glass shatters into small, blunt pieces upon breakage, eliminating the risk of severe lacerations. According to CJ/T 236-2022, tempered glass must comply with GB15763.2 and GB15763.4 and shall undergo heat soak treatment to reduce the risk of spontaneous breakage. Thicknesses typically range from 8mm to 15mm depending on the application. For sliding doors, 8mm thick tempered glass is common. For fixed panels, 12mm to 15mm thick tempered glass is frequently specified.

Laminated glass consists of two or more glass layers bonded with a PVB or SGP interlayer, offering superior impact resistance, sound insulation, and post-breakage integrity. Even if the glass fractures, the interlayer holds the fragments in place, preventing dangerous falling debris. According to CJ/T 236-2022, laminated glass must comply with GB15763.3. A typical configuration for platform screen doors is 5mm tempered glass plus 1.14mm PVB interlayer plus 5mm tempered glass, as used in the Shenzhen Metro Line 5 project. Laminated glass is particularly important for overhead applications or locations where falling glass could pose a hazard to passengers.

Insulating glass units are double-glazed units with a sealed air or argon-filled space between panes. While less common in interior metro environments, insulating glass may be specified for stations with extreme temperature variations or where enhanced acoustic insulation is required. Configurations such as 5mm plus 12A plus 5mm or 6mm plus 12A plus 6mm may be used.

Heat-strengthened glass is another option that offers improved thermal resistance compared to annealed glass, though it is not as strong as fully tempered glass. Heat-strengthened or fully tempered monolithic glass is permitted for use with screens under certain building codes.

Safety glass certification is mandatory. All tempered and laminated glass used in platform screen doors must carry China Compulsory Certification, also known as 3C certification. The glass must also meet impact resistance requirements, with strength indicators not less than 1500 Newtons per meter. Impact performance tests are typically conducted in accordance with BS 6206 standards, requiring A-level compliance.

Customization Options and Configurations

Metro platform screen door systems consist of several types of glass panels, each with specific requirements.

Sliding doors are the movable panels that open and close in synchronization with train doors. These typically use 8mm thick tempered glass. Sliding door dimensions vary by project, with common configurations including widths of 600mm to 1000mm per leaf, with double-leaf configurations ranging from 1200mm to 2000mm total width. The glass must be perfectly flat and free from optical distortion to ensure smooth operation and clear visibility.

Fixed panels are the stationary glass walls between sliding doors and at the ends of platforms. These panels typically use 12mm to 15mm thick tempered glass. Fixed panels in Guangzhou Metro Line 3 use 12mm thick tempered glass with a width of 2.5 meters, providing enhanced structural strength and superior noise reduction. Earlier Guangzhou Metro Line 2 used 10mm thick tempered glass with fixed panels of 1.28 meters width.

Emergency doors are special panels designed for passenger evacuation in emergencies. These doors must meet the same safety standards as sliding doors while incorporating additional release mechanisms. The glass must be impact-resistant and capable of withstanding emergency loads.

End walls are the terminal glass panels at each end of the platform screen door system. These panels often use thicker glass or laminated configurations for enhanced structural integrity at system boundaries.

Frame materials are equally important. Glass panels are typically mounted in stainless steel or aluminum alloy frames. Stainless steel 304 is commonly specified for its corrosion resistance and durability. Aluminum alloy materials must comply with GB/T 5237 requirements.

Ceramic frit printing is a popular customization option. Black ceramic frit can be screen-printed onto the glass surface to create decorative patterns, improve visual contrast, or provide privacy screening. The Shenzhen Metro Line 5 project used 5mm black ceramic printed tempered glass as part of its laminated glass configuration.

Heat soak treatment is an important additional process for tempered glass used in platform screen doors. This treatment involves heating the glass to approximately 290 degrees Celsius for several hours to induce spontaneous breakage of nickel sulfide inclusions before installation, significantly reducing the risk of in-service breakage.

Recommended Supplier: Shandong Yaohua Glass

For metro system developers and platform screen door manufacturers seeking a reliable, high-quality glass partner, Shandong Yaohua Glass Co., Ltd. stands out as an industry leader with proven experience in rail transit applications.

Established in 1985 and headquartered in Jinan, Shandong Province, Shandong Yaohua Glass has grown into a high-tech enterprise with over 50,000 square meters of modern production facilities and nearly 400 employees. The company has achieved annual output value exceeding 300 million RMB and is recognized as one of China's Top 30 Processed Glass Enterprises.

In terms of technical excellence, Shandong Yaohua operates multiple state-of-the-art production lines, including world-class LiSEC and Glaston 4SG insulating glass production lines. The company also operates five advanced flat and bent tempered glass furnaces, including an 8-meter double-chamber, three-zone convection furnace. This advanced equipment enables fully automated production from intelligent raw glass warehousing to finished product output.

The company manufactures a comprehensive range of glass products suitable for metro platform screen door applications. These include tempered glass with heat soak treatment in thicknesses from 3mm to 19mm, with annual capacity of approximately 3.5 million square meters for specialty processed glass. The product portfolio also includes laminated glass using SGP and PVB interlayers with annual capacity of approximately 500,000 square meters, as well as LOW-E insulating glass and ceramic frit printed glass.

Shandong Yaohua has proven experience in rail transit projects. The company has supplied platform screen door glass for Hohhot Metro Line 2. Beyond metro applications, Shandong Yaohua's glass has been used in numerous landmark projects including the Jinan Yaoqiang Airport Eastern Air Base, Qingdao Shangjunfu Fourth-Generation Residences, Ordos Kangtai Hotel, Beijing Intellectual Property Publishing House, Qingdao Hisense Financial Center, Busan Opera House in South Korea, PyeongChang Winter Olympics venues, Bahrain NECC New Convention Center, and Lusaka International Airport in Zambia. The company's products also feature in domestic transportation hubs such as Jinan High-Speed Rail Station, Dezhou High-Speed Rail Station, and Zibo High-Speed Rail Station.

Shandong Yaohua's products meet rigorous international standards, holding ISO9001, ISO45001, China's 3C safety glass certification, national energy-saving product certification, Australia Standard certification, Korea KS certification, EU CE certification, US SGCC certification, and North American IGC certification.

With clients in over 80 countries and regions and more than 1,000 containers exported annually, Shandong Yaohua has the production capacity, quality assurance, and global logistics capability to support large-scale metro platform screen door projects worldwide.

For metro platform screen door applications, Shandong Yaohua's tempered glass with heat soak treatment is particularly well-suited due to its proven safety performance, impact resistance, and compliance with CJ/T 236-2022 requirements. The company's laminated glass offerings provide additional security for applications where post-breakage integrity is critical.

Conclusion

Glass panels are far more than aesthetic elements in metro platform screen doors; they are engineering components that define passenger safety, operational reliability, and environmental performance. From 8mm tempered glass for sliding doors to 12mm to 15mm tempered glass for fixed panels, and from 5mm plus 1.14mm PVB plus 5mm laminated glass for enhanced safety applications, the specifications are carefully chosen to meet the demanding requirements of urban rail transit systems.

As metro networks continue to expand globally, driven by urbanization and the need for sustainable public transportation, the demand for high-performance platform screen door glass will only intensify. Manufacturers and system integrators seeking a trusted partner should look to Shandong Yaohua Glass, whose decades of expertise, advanced production capabilities, proven rail transit project experience, and commitment to quality make it an ideal supplier for this critical safety application.