Powerful visual transparent 6mm HST +12A+8mm HST Low Iron heat soak testing glass for glass walls

In commercial properties it is common for glass to be placed in inaccessible places, making it more complex and inconvenient to replace if needed. Glass experts in this field such as Dragon Glass will suggest to our client that specifying heat soak testing glass in panels that are inaccessible on completion of construction is used to reduce the risk of spontaneous breakage in architectural glazing and additional costs.

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What is heat soak tested glass – HST？

Heat soak testing is a process carried out in the manufacturing stage of glass, used to reduce the risk of spontaneous breakage in architectural glazing.

Tempered glass manufactured by Dragon Glass ranks among the very top-quality products. It complies with PN-EN 12150-1 standard regarding strength, fracture pattern, dimensions, and tolerances as well as edge finish.

Nevertheless, we cannot overcome some weaknesses of float glass in production:

Stunningly transparent 6mm HST +12A+8mm HST Low Iron heat soak testing glass for glass walls

Tiny nickel sulfide crystals (NiS) may occur in the molten glass during the float glass production process. When glass is heated during toughening, nickel sulfide impurities in the glass pane increase their volume; when the heated glass is rapidly quenched in the toughening process, the impurities, which need a certain amount of time to return to their original state, cannot do so and become “frozen”, producing additional local stress concentration.

The mechanism resembles a delay-action bomb: when toughened glass containing nickel sulfide impurities is used in a structural glazing system on a building façade, it gets heated by sun rays, allowing frozen crystals to expand, and thus generating even more internal stress. With inclusion in the core tensile zone, stress is highly likely to exceed the acceptable level, causing spontaneous fracture of the pane.

In order to minimize the risk of user injury and having to replace glass in the future, we will conduct a heat soak test procedure in production, During this thermal treatment, any glass containing nickel sulfide is forced to shatter, leaving only panes with reduced risks.

How to produce 6mm HST +12A+ 8mm HST low iron heat soak testing glass for glass walls?

Cutting and polish:

Cut the 6mm low iron glass and 8mm low iron glass to the final size, then polished the edges with grinding machines, and clean the glass surfaces by washing machines.

Stunningly transparent 6mm HST 12A8mm HST Low Iron heat soak testing glass for glass walls 2

Tempered process:

Transfer the 6mm low iron glass and 8mm low iron glass to tempering machines, with heat to around 700-degree temperature, and keep for due time. Using the strong wind jet to cool the glass rapidly. Thus causing the glass surface to compress whereas the interior side is still in tension. This thermal treatment will increase the glass strength to above 95 Mpa.

Stunningly transparent 6mm HST 12A8mm HST Low Iron heat soak testing glass for glass walls 1

Heat soak test procedure:

Heat soak testing is a destructive test treatment that takes place after the tempered process. The finished 6mm FT glass and 8mm FT glass are placed into a large heat-soaking oven and heated to around 290 +- 10 degrees Celsius and held at that temperature for approximately 2 hours, it is removed from the oven facility. During this thermal treatment, any glass containing nickel sulfide with inclusions will be identified and suffer a fracture.

Stunningly transparent 6mm HST 12A8mm HST Low Iron heat soak testing glass for glass walls 3

Insulated Process:

6mm HST glass and 8mm HST glass are separated by a 12A spacer and sealed together at the edge. The insulating airspace is filled with dry air inside to slow the heat exchange and reduce noise levels. The aluminum spacer is filled with silica desiccant pellets to ensure the removal of any moisture in the airspace.

Stunningly transparent 6mm HST 12A8mm HST Low Iron heat soak testing glass for glass walls 4

When it comes to producing IGUs, attention to detail is key, and our team of experts is dedicated to ensuring every unit meets these high standards. Of course, we can produce High quality insulated glass automatically produced by Lisec intelligent plant.

Benefits of heat soak testing for commercial and residential glass:

1, Improves heat resistance
2, Reduce the damage to people caused by glass self-explosion.
3, Cut loss due to on-site breakage.
4, Reduce the additional costs of replacing glass panes.
5, We recommend using heat soak tested glass where difficult places to replace glass such as roof or high-level glazing, balustrades, screens, and high-level curtain walling.

Specifications:

Production name: 6mm low iron HST +12A+ 8mm low iron HST IGU
Glass raw material: Top A grade
Glass thickness: 26mm, other thicknesses are also available;
Glass color option: Low iron, other colors clear, blue, gray, green, pink, and bronze are also available;
Glass shape: Flat, Curved is available;
Heat soak test standards: Subject to BS EN 14179-1:2005; Tested in accordance with EN 12600: Glass in building – Pendulum test – Impact test;
Quality: CE/ASTM/AS/ISO9001/BS/CE;
Packing: Strong plywood crates;
Capacity: 2000SQM/day;
Production time: 15~25 days;

Dragon Glass heat soak test standards:

Dimension: Refer to BS EN 14179-1:2005 and PMB customer’s standard
Appearance: 15763.4-2009 and BS EN14179 client’s standard
Heat soak testing: Refer to BS EN 14179-1:2005 and PMB customer’s standard (BD’SAPP-37).
Tested: 100% full inspection. In accordance with EN 12600: Glass in building: Pendulum test, Impact test, Fragmentation test.

Quality:

Subject to BS;
Subject to AS;
Subject to ASTM;
Subject to CE.

Applications of heat soaking IGU:

In commercial properties it is common for glass to be placed in inaccessible places, making it more complex and inconvenient to replace if needed.

To prevent the risk of breakages, architects should specify heat soak tested glass. Glass units with this treatment are already proven to withstand the intense thermal strain and will not cause any further damage during installation or in future use – so you can relax!

Product details:

Packing and delivery:

When you install complicated or intricate glass designs or glass installations using oversized or very specialized glass units, it has more valuable to using heat soak tested glass that may be difficult to access or replace once construction is completed.

If you still have questions about whether heat soak tested glass would be suitable for your project, contact the Dragon Glass team today, Our experienced team of glass experts is on hand to answer any of your questions.