China’s 5mm Flat Glass market includes large manufacturers with different strengths in production scale, product range, and export experience. A useful supplier shortlist may include Xinyi Glass, CSG Holding, Kibing Group, Jinjing Group, and China Yaohua Glass. Their suitability depends on the project, not simply their ranking. A distributor needing steady container loads may value capacity and delivery schedules. A façade contractor may focus more on thickness tolerance, optical quality, processing options, and consistent batch performance.
This guide compares suppliers through practical questions: Can they provide current product specifications? How do they document quality checks? What packaging protects sheets during long-distance transport? Ask for recent test reports and samples, then confirm dimensions, tolerances, and shipping terms in writing. A clear answer matters. So does a reliable sample.
I cannot responsibly attach a quotation to a named glass expert without a verifiable source. Invented quotes can mislead buyers, especially when technical decisions depend on dependable information. The comparison below therefore avoids presenting an unverified statement as expert testimony. It also recognizes a limitation: supplier capabilities and product availability can change, and a company’s broad reputation does not guarantee every shipment will meet a buyer’s needs. Check the details directly before placing an order.
A 5 mm flat-glass sheet weighs about 12.5 kg per square metre. The calculation is simple: 0.005 m thickness multiplied by a density of 2,500 kg/m³. EN 572-1:2012 gives this approximate density for basic soda-lime silicate glass, a common flat-glass material. National Glass Association glazing guidance also uses roughly 2.5 kg per square metre for each millimetre of glass thickness. So the figures agree.
A one-square-metre pane is a little heavier than a full grocery bag. A 1.2 by 2.4 metre sheet weighs about 36 kg before packaging. That matters when comparing supplier quotations, estimating lifting needs, or checking transport capacity. But this is an estimate, not a scale reading. Actual weight can vary with measured dimensions, thickness tolerances, and glass composition. Small differences add up across a pallet. Supplier specifications should state nominal thickness and sheet dimensions clearly; otherwise, a neat calculation can create false confidence. Real measurements still matter.
Supplier rankings require current, comparable company-level evidence. This table avoids unsupported rankings and company names, and provides verifiable 5 mm glass reference data and practical criteria for comparing suppliers.
| Metric | Reference or supplier information to verify | Why it matters |
|---|---|---|
| Nominal thickness | 5 mm (0.005 m) | Confirm the specified thickness and applicable tolerances on the supplier’s technical documentation. |
| Reference density | Approximately 2,500 kg/m³ | A standard reference value used to estimate the mass of soda-lime glass; actual values can vary by composition. |
| Estimated areal mass | 5 mm × 2,500 kg/m³ = approximately 12.5 kg/m² | Useful for estimating handling, transport, and structural loads. This is glass mass only, excluding packaging. |
| Mass calculation example | For a 2 m² pane: 2 × 12.5 = approximately 25 kg | Calculate expected pane mass from the actual cut size and use the supplier’s packing details for shipment estimates. |
| Product and quality documentation | Request the product specification, declared dimensions and tolerances, inspection records, and any applicable conformity documents. | Documentation helps compare like-for-like products and check that the supplied glass matches the order and destination-market requirements. |
Compare thickness tolerance, flatness, visible defects, packing, lead time, and export documents. Use the same drawing and acceptance criteria for every quote.
Inspect samples under consistent lighting, including angled light. Look for uneven thickness and visible defects. A quick glance may miss things.
No. Reported national output describes the whole market, not one supplier’s usable capacity. Ask how many active lines currently produce 5 mm glass.
Ask about daily output and whether capacity figures include idle or planned furnaces. Line count alone can be misleading.
Check whether the sheet suits your dimensions and optical needs. Confirm compatibility with cutting, tempering, lamination, or coating.
Not by itself. HS code 7005 covers float glass and surface-ground or polished glass, while country-level records show broader trade patterns.
A low quote may exclude edge processing, special packing, or inland freight. Request a clear breakdown before comparing offers.
Request recent destination records, packaging details, and evidence of repeat shipments. Also ask how breakage claims and replacement shipments are handled. Distance alone proves little.
Not necessarily. Compare current product data, samples, and delivery consistency against your requirements. I might still overlook batch variation, so inspect each order carefully.
5mm Flat Glass is a common material for construction and interior applications. At a typical glass density of 2,500 kg/m³, a 5 mm sheet weighs about 12.5 kg per square metre. When comparing Chinese suppliers, buyers can assess the number of float lines, annual production capacity, product range, and export reach to understand whether a supplier can meet their volume and delivery needs.
Quality checks should include conformity with GB/T 11614-2022 and review of specifications such as thickness, appearance, and dimensional accuracy. Before ordering, confirm available sheet sizes, permitted tolerances, minimum order quantities, packaging, delivery terms, and lead times. Clear agreement on these details helps buyers compare quotations consistently and reduces the risk of mismatched expectations during production and shipment.
Guoxin Glass