Heat Soak Test Furnace
Spontaneous breakage prevention. 280–320°C holding at ±5°C uniformity. Multi-layer rack system. EN 12150 / ASTM C1048 compliant. Every tempered panel verified safe before installation.
Como Funciona
Every Panel Verified Safe.
NiS inclusion detection, ±5°C uniformity, continuous data logging — the safety stage every tempering line needs.
±5°C Uniformity
Four to six independent PID-controlled heating zones with forced-air cross-flow circulation ensure temperature uniformity of ±5°C across the entire furnace volume — from center to edges, from top rack to bottom. This uniformity is critical: any cold spot could allow NiS inclusions to survive the heat soak cycle.
Multi-Layer Rack System
Stainless steel multi-layer racks with adjustable ceramic stand-off pins accommodate 1–5 layers of glass per load — maximizing throughput within the furnace volume. Rack height adjusts automatically for glass thickness from 3–25mm. Ceramic pins prevent glass-to-glass contact and avoid surface marking.
Continuous Data Logging
Every thermal cycle is logged in real-time — 12–24 temperature monitoring points, zone temperatures, heating/cooling rates, holding duration, and alarm events. Data is archived for quality certification and can be exported for customer traceability. OPC-UA integration feeds directly into factory MES systems.
EN 12150 / ASTM C1048 Compliant
The furnace thermal profile and control system are designed to meet EN 12150, EN 1863, and ASTM C1048 standards for heat soak testing of fully tempered glass. The PLC stores pre-programmed standard profiles and prevents cycle start if parameters are outside specification.
Motorized Door & Interlocks
The vertically-lifting furnace door is motorized with high-temperature silicone gasket sealing. Door interlocks prevent opening during any cycle phase above 100°C — protecting operators from thermal exposure. The door operation is synchronized with the conveyor system for seamless load/unload sequences.
Energy-Efficient Insulation
200mm ceramic fiber blanket insulation with Class A rating reduces heat loss to below 5% at 350°C — significantly lowering energy consumption compared to refractory brick alternatives. The insulation reaches operating temperature faster, reducing pre-heat time and total cycle energy.
Technical Specs
Complete specifications for the Heat Soak Test Furnace range — 65 parameters.
Especificações
65 parametersConfiguration Comparison
Side-by-side comparison of all three HST Furnace configurations.
What It Verifies
From architectural facades to overhead skylights — every tempered panel verified safe before installation.
Architectural Tempered Glass
Facade & Curtain Wall Safety
Heat soak testing is mandatory for fully tempered glass used in overhead, facade, and curtain wall applications where spontaneous breakage poses a safety risk. The HST Furnace processes full architectural panels up to 3300×12000mm — verifying every panel before installation.
Escolha sua Configuração
Three tiers — from basic HST compliance to fully automated production.
Manutenção e Cuidados
Element inspection, thermocouple calibration, insulation checks — keep your HST furnace running at peak.
Fully tempered glass panels are transported from the tempering furnace outfeed via motorized roller conveyor into the HST furnace loading zone. Photo-eye sensors detect panel dimensions. The loading system stacks panels onto multi-layer stainless steel racks — with ceramic stand-off pins separating each layer to prevent glass-to-glass contact. Rack height is adjustable for different glass thicknesses (3–25mm). The loaded rack advances into the furnace chamber via the motorized conveyor.
Frequently Asked Questions
Answers to common queries about heat soak testing, NiS inclusions, and furnace operation.
Tempered glass can contain microscopic nickel sulphide (NiS) inclusions trapped during manufacturing. These inclusions can spontaneously expand months or years after installation, causing catastrophic breakage. Heat soak testing at 280–320°C accelerates this phase transformation, forcing any defective panels to break inside the furnace rather than in the building. It is mandatory for overhead, facade, and curtain wall applications per EN 12150 and EN 1863.
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