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Cold Storage Panel (PIR Core/PU Core / PU-Edge Sealed Rock Wool Core)

Cold Storage Panel

Cold storage panels don't have significant differences in appearance compared to other types of sandwich panels. All can be customized according to customers' requirements. The main differences come from the variations in the internal core materials, resulting in distinctions in thermal insulation performance, fire - resistance rating, structural characteristics, cost control, etc., due to different materials.

Specification

Item / Type	PIR Panel	PU Panel	PU-Edged Rock Wool Core Panel
Core Material	High-density modified polyurethane (PIR)	Standard polyurethane	Central rock wool + PU edge sealing
Thermal Conductivity	≤ 0.020 W/m·K	≤ 0.024 W/m·K	Rock wool ≤ 0.040; edges sealed with PU
Insulation Performance	⭐⭐⭐⭐⭐ (Excellent)	⭐⭐⭐⭐ (Very good)	⭐⭐⭐ (Moderate, with good edge insulation)
Fire Resistance	B1 ~ B2 grade	B2 grade	Rock wool A-grade; entire panel can achieve A-grade
Core Structural Stability	Extremely high	Medium to high	Relatively high (rock wool resists thermal deformation)
Water Vapor Resistance	Excellent	Good	Rock wool partially moisture-resistant; PU edges compensate
Applicable Temperature Range	-50℃ ~ +50℃	-40℃ ~ +45℃	-25℃ ~ +50℃ (Not suitable for ultra-low temperature)
Price Level	Highest	Medium	Relatively low
Recommended Application Scenarios	Ultra-low temperature cold rooms, medical cold storage	General cold storage and freezing rooms	Cold rooms/food partitions with high fire resistance requirements

Product Description

Used in industrial workshops, storage rooms, and utility areas with high fire safety requirements, offering A-grade fire resistance and partitioning capabilities.

Applied in food processing plants, pharmaceutical workshops, and cleanrooms where fireproofing, sound insulation, and moisture resistance are required under GMP compliance.

Ideal for cold storage and temperature-controlled logistics centers; PU edge sealing enhances airtightness and thermal bridge resistance.

Used in modular buildings like mobile rooms, prefab medical units, and rapid-deployment structures requiring lightweight and stable enclosure systems.

What Is PIR?

PIR is Polyisocyanurate Foam.

What are the differences between PU and PIR?

Item	Polyurethane (PU)	Polyisocyanurate(PIR)
Molecular Structure	Linear structure, general thermal stability	Cyclic structure, better heat resistance
Fire - proof Performance	Generally B2 grade	B1 grade, more stable combustion, low smoke and toxicity
Temperature Range	-40°C ~ +45°C	-50°C ~ +80°C (Stronger thermal stability performance)
Burning Behavior	Prone to dripping and produces black smoke	Carbonized layer protection, which inhibits flame spread
Environmental Performance	General formula	Can choose more environmentally friendly / low - VOC blowing agents

PIR is an upgraded version of PU. It has stronger thermal insulation, safer fire resistance, and slower aging. It is suitable for cold storage with extremely high requirements for temperature control and safety. Its cost is slightly higher than that of ordinary PU, but it is more energy - efficient and reliable during long - term operation.

Company Profile

At Ecosteel Source, we combine manufacturing expertise and global trade experience to deliver sustainable, high-performance steel materials and advanced building solutions that shape the future of modern construction.

With a full range of products covering Zinc-Aluminum-Magnesium (ZAM) coated steel, galvalume (GL) steel, galvanized (GI) steel, pre-painted steel (PPGI/PPGL), as well as floor deck systems, C/Z/U structural purlins, metal studs&tracks (roof&wall), corrugated color steel sheets (roof&wall), sandwich panels and cleanroom panels, we deliver comprehensive solutions for modern roofing and wall cladding systems.

Combining advanced processing capability, strict quality control, and customized service, Ecosteel Source aims to help our partners to build durable, energy-efficient, and sustainable architectural projects worldwide.

Pack & Ship

Shipping & Paymentterm

How to start your Project and Business?

Inquiry

Provide product specifications(materia size, coating, color, quantity, application).
Quotation

Get formal quotation with price, leao time, payment,and other details.
Sample

Confirm samples or drawings for customized colors patterns.
Contract & Payments

Sian Pl/contract and pay deposit to schedule production; Special customizec products require full payment in advance.

Production

Manufacturing with strict quality control,third-party inspection available.
Packing & Balance

Packed to international standards,and settle balance payment.
Shipment & Documents

Shipment arranged with documents,receive full set of shipping documents.
After-sales

Technical support,long-term supply and project services.