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Sandwich Corrugated Steel Plate

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Sandwich Corrugated Steel Plate

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Corrugated Steel Plate

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Product Description

Composed of two pre-painted steel sheets (top sheet corrugated, bottom sheet usually flat or micro-ribbed) with a rigid insulating core bonded under heat and pressure. Features excellent thermal insulation, sound reduction, lightweight structure, and high load-bearing capacity. Available core materials: polyurethane (PU), rock wool, expanded polystyrene (EPS), or PIR. Top sheet: pre-painted galvanized or galvalume steel, corrugated profile (e.g., 18/76, 18/86, 32/130, trapezoidal) with polyester, PVDF, or HDP coating. Bottom sheet: flat or ribbed, same coating quality. Total thickness from 50mm to 200mm. Effective width typically 1000mm or custom. Steel thickness: 0.4mm–0.8mm. Excellent fire resistance for rock wool and PIR versions. Panels are self-supporting, easy to cut and install with concealed or exposed fasteners. Custom lengths and profiles available.

Parameter

Product Name	Corrugated Sandwich Panel (Insulated Roof/Wall Panel)
Core Material Types	Polyurethane (PU), Rock Wool (MW), Expanded Polystyrene (EPS), PIR
Length	Customizable, typically 2,000 – 12,000 mm (within transport limit)
Effective Width	1,000 mm (standard), 900 mm or 1,050 mm available upon request
Overall Thickness	50 mm, 75 mm, 100 mm, 120 mm, 150 mm, 200 mm
Top Sheet Profile	Corrugated (e.g., 18/76, 18/86, 32/130, or trapezoidal 35/125)
Bottom Sheet Profile	Flat or micro-ribbed
Steel Thickness	0.4 mm – 0.8 mm (top & bottom)
Steel Grade	DX51D, S250GD – S550GD (pre-painted galvanized or galvalume)
Coating Type	Polyester (standard), PVDF, HDP – RAL colors available
Core Density	PU: 38–45 kg/m³; Rock Wool: 100–150 kg/m³; EPS: 15–25 kg/m³; PIR: 40–50 kg/m³
Thermal Conductivity (λ)	PU/PIR: ≤0.024 W/(m·K); Rock Wool: ≤0.040 W/(m·K); EPS: ≤0.041 W/(m·K)
Fire Resistance	PU/EPS: Class B3 (E) / Class F; Rock Wool: Class A1 (non-combustible); PIR: Class B1 (self-extinguishing)
Compressive Strength	PU/PIR: ≥150 kPa; Rock Wool: ≥40 kPa; EPS: ≥100 kPa (at 10% deformation)
Bending Capacity	Depending on thickness & core type, suitable for roof loads (snow, wind)
Standard Compliance	EN 14509 (self-supporting double-skin metal-faced insulating panels), ASTM E84, ISO 9001
Joint Type	Concealed or exposed screw – overlap or tongue & groove

Application description:

Widely used for roofing and wall cladding in industrial factories, warehouses, cold storage rooms, agricultural buildings, and commercial complexes. Also suitable for temporary offices, clean rooms, prefabricated houses, and partition walls. The insulating core (PU, rock wool, EPS, PIR) provides excellent thermal and acoustic performance, making it ideal for temperature-controlled or noise-sensitive environments.

Production description

The process begins with two pre-painted steel coils (top and bottom). The top coil is roll-formed into a corrugated profile while the bottom coil remains flat or micro-ribbed. Both sheets are preheated and passed through a double-sided laminating machine. Simultaneously, liquid polyurethane (or other core material) is dispensed between the two metal sheets. For rock wool or EPS cores, pre-cut slabs are placed and bonded with adhesive. The assembly moves through a continuous double-belt press where the core cures or sets under controlled temperature and pressure. The continuous sandwich panel is then cooled, trimmed to width, and cut to length by a flying saw. Finished panels are inspected for core adhesion, surface quality, and dimensional accuracy, then stacked and packed.

Shipping Packaging

For export, corrugated sandwich panels are stacked flat with interleaved foam or paper to protect painted surfaces, secured with heavy-duty steel straps, and packed on ISPM-15 certified wooden pallets. Edge protectors prevent damage. Wrapped with stretch film and moisture-proof polyethylene. Labels include panel thickness, length, core type, and quantity for safe transport.

Why Choose Us?

1.Over 15 years of experience in manufacturing insulated sandwich panels with strict quality control.

2.Professional technical support to help you select the right core material, thickness, and profile for your project.

3.Flexible customization – any length, panel thickness, and color available with fast lead times.

4.Reliable export logistics with professional packing, container loading, and on-time shipment worldwide.

5.Comprehensive after-sales service including installation guidance and timely response to inquiries.

FAQ

1. Are you a factory? Can you accept customization and factory audits?
Yes, we are a direct manufacturing facility. We welcome factory audits at any time. We fully support custom lengths, panel thicknesses, core materials, colors, and profiles based on your requirements.

2. How do you ensure quality control?
Our factory is ISO 9001 certified. We conduct in-process inspections of core density, steel thickness, and panel adhesion, plus a final check on dimensions, surface finish, and load capacity before shipping.

3. Can you provide technical support and after-sales service?
Yes, our engineering team offers free guidance on panel selection, core material choice, and installation details. We also respond to any quality issues within 24 hours.