High-Quality 50mm Sandwich Panel Manufacturers & Exporter

Thermal Control, Structural Strength, and Sustainability Engineered for Global Industrial Infrastructure

1996 Established Since
60k+ SQM Production Site Area
180+ Expert Staff Workers
10 QC Quality Control Experts

Engineering Core: The Thermodynamics of 50mm Sandwich Panels

A comprehensive analysis of structural capability, heat transfer rates, and raw material configuration.

Thermophysical Parameters

Maximizing thermal insulation index within a low-thickness profile.

  • U-Value: ≤ 0.44 W/m²·K
  • Core Density: 40–42 kg/m³
  • Conductivity (λ): 0.022 W/m·K

Structural Capabilities

Excellent resistance to structural loads under extreme pressure conditions.

  • Compressive Strength: ≥ 150 kPa
  • Shear Strength: ≥ 120 kPa
  • Metal Skin: 0.4–0.8 mm Steel

Fire Protection & Safety

Engineered core formulation that slows fire progression and meets safety codes.

  • PIR Rating: B1-S1, d0 (EN 13501-1)
  • PUR Rating: B2 / B3 Option
  • Smoke Index: Class 1 / FM Approved

Technical Design of the 50mm Sandwich Panel

The 50mm sandwich panel is structured to provide high thermal resistance in a thin design. The panel features two outer metal skins (usually galvanized steel or aluminum) and a central core of polyurethane (PUR) or polyisocyanurate (PIR) foam. This design creates a composite element with a high strength-to-weight ratio.

Thermal conductivity calculations are based on the equation:
U = λ / d
Where λ is the thermal conductivity of the foam (0.022 W/m·K) and d is the panel thickness (0.05m). The resulting U-value of 0.44 W/m²·K helps control heat transfer and reduce HVAC energy requirements in cold storage and commercial facilities.

"Through molecular cross-linking, the polyisocyanurate (PIR) core forms a carbonaceous char layer when exposed to flames. This reaction seals the core and retards heat transmission, helping projects meet global structural safety codes."

Structural Strength and Facing Selection

The structural integrity of our 50mm panels depends on the bond between the metal facings and the insulated core. Using high-density steel sheets (0.5mm to 0.8mm) treated with zinc coatings (Z275) or PVDF paint finishes protects against corrosion in high-humidity or coastal locations.

To prevent thermal bridging at panel joints, our systems use a double tongue-and-groove joint profile. This design incorporates a continuous sealing strip that creates an airtight fit. For cold storage assemblies, cam-lock systems provide mechanical compression to maintain tight joints.

About Shaanxi YuanShengHeTong Refrigeration

A specialized enterprise providing insulation panels, cold storage doors, and industrial refrigeration equipment.

Shaanxi YuanShengHeTong Refrigeration Equipment Co., Ltd. is a professional manufacturer and project contractor focusing on insulation panels and industrial refrigeration equipment. In addition to manufacturing, we provide project design, engineering installation, and after-sales support.

We integrate manufacturing, project solutions, engineering services, and international trade. Our services support refrigeration projects for the fruit and vegetable sector, food processing industries, large supermarkets, cold-chain logistics, and medical refrigeration applications. Since starting operations in 1996, we have accumulated over 20 years of experience in the industrial refrigeration market.

Our Growth Timeline

1996
Our founder started the business in refrigeration equipment marketing and installation.
2006
Completed our first factory in Shaanxi and produced our first cam-lock sandwich panels.
2011
Completed our second factory in Lanzhou, expanding our business coverage to the northwest China market.
2012
Relocated Shaanxi operations to a larger 120-acre facility, establishing 8 advanced workshops to support international trade.
2018
Installed our first automatic split-joint production line to improve panel assembly precision.
2020
Commissioned a second automatic production line, increasing output capacity and manufacturing consistency.
2023
Initiated updates to transition our facilities to eco-friendly production operations.

Manufacturing Infrastructure & Quality Control

Inside our 60,000 square meter production site, featuring automated manufacturing lines and quality testing systems.

Our facility employs approximately 180 workers and a 10-person Quality Control team to monitor production. The 60,000-square-meter site houses 4 standardized workshops equipped with continuous automated production lines. We manufacture PIR and PU sandwich panels, cold storage doors, air coolers, condensers, and compressor units to ensure product compatibility.

Global Procurement Trends & Industrial Applications

How international standards and engineering requirements shape B2B procurement for sandwich panels.

1. Cold-Chain Logistics and Distribution Hubs

Growth in cold-chain logistics across Southeast Asia, North America, and Europe has increased demand for efficient storage materials. A 50mm insulation panel is often chosen for medium-temperature storage, antiroom buffer zones, and distribution loading docks. Standardizing on 50mm PIR panels helps logistics developers balance insulation performance with cargo space requirements.

2. Pharmaceutical Cleanrooms & Laboratories

Pharmaceutical and biological manufacturing facilities must comply with GMP and FDA standards. These environments require wall and ceiling systems that prevent particle accumulation. Our 50mm PIR panels feature flush-joint details and chemical-resistant coatings, allowing them to withstand regular sanitation procedures without degrading.

3. Food Processing and Controlled Atmospheres

Food preparation plants require structures that are easy to clean and resist bacterial growth. Using food-grade coatings, such as PET or PVC laminates, on 50mm panel skins prevents corrosion from organic acids and sanitizers. These panels help maintain the stable internal temperatures required for food safety.

Technical Roadmap & Future Outlook

Our commitment to sustainability and advanced engineering in thermal insulation.

Low-GWP Blowing Agents

We are transition our manufacturing lines to use pentane blowing technologies. This reduces the ozone depletion potential (ODP) to zero and minimizes global warming potential (GWP), helping project developers meet international green building certifications like LEED and BREEAM.

Hybrid Core Formulations

Our R&D team is developing hybrid polyurethane-silica aerogel cores. This research aims to reduce thermal conductivity below 0.018 W/m·K, allowing a thinner 50mm panel to provide the thermal performance of traditional 75mm panels.

Integrated Smart Sensors

We are exploring embedding micro-sensors within the core insulation layer during the continuous pouring stage. These sensors can monitor real-time heat flux, internal moisture levels, and structural deflection to assist with facility maintenance.

Global Compliance & Quality Assurance

Our panels are manufactured to comply with major international building codes and standards.

Exporters must ensure their building materials meet local regulations. Our 50mm PIR and PU sandwich panels undergo testing to verify compliance with major global building standards:

  • European Union (CE Marking): Tested in accordance with EN 14509:2013 for self-supporting double-skin metal-faced insulating panels.
  • Fire Performance (FM Global / ASTM): Meets ASTM E84 Class A requirements, verifying flame spread and smoke development indices.
  • Structural Loading (ISO 9001:2015): Manufactured under certified quality control systems to ensure consistent density, shear strength, and face adhesion.

International Quality Certificates

ISO Quality Certificate
CE Mark Approval
Fire Resistance Test Rating
Thermal Conductivity Verification
Acoustic Insulation Test
Factory Management Certification
Environmental Standard Certification
Verification of Conformity Document

Technical Q&A: Insulated Panel Engineering

Common questions regarding the installation, performance, and selection of 50mm sandwich panels.

What is the maximum span limit for a 50mm sandwich panel in ceiling applications?
The maximum span limit depends on the design load (including wind, thermal, and maintenance loads). For a standard 50mm panel with 0.5mm steel facings, the typical span limit is between 2.5 to 3.5 meters under normal distributed loads (approx. 100 kg/m²). For longer spans, structural supports or ceiling hangers are required to prevent excessive deflection.
How do PIR and PUR cores compare regarding fire performance and thermal insulation?
Both materials have similar thermal insulation properties, with thermal conductivity (λ) values around 0.022 W/m·K. The primary difference is in fire performance: PIR (Polyisocyanurate) has higher chemical stability, allowing it to withstand higher temperatures before degrading, and meets B1-S1, d0 fire safety ratings. PUR (Polyurethane) typically meets B2 or B3 ratings and is suitable for applications where fire safety codes are less restrictive.
Which panel facing options are recommended for high-humidity food processing plants?
For high-humidity or corrosive environments, we recommend using stainless steel (grade 304 or 316) or galvanized steel with a PVC/PET laminate coating. These coatings protect the steel from moisture and acidic sanitation chemicals, helping to prevent corrosion and maintaining compliance with food safety regulations.
How do the joints prevent water vapor infiltration over time?
Our panels use a double tongue-and-groove joint design. During installation, butyl sealant or silicone is applied along the joint, and the panels are compressed together (using cam-locks or fasteners). This creates an airtight seal that prevents vapor transmission and moisture condensation within the core, protecting the thermal insulation properties over time.