cold room panel manufacturer

1. The Surface Material: Your First Line of Defense In food processing, demand stainless steel skins—never standard painted steel. Most modern facilities utilize 304 stainless steel for general production areas. Its smooth, non-porous finish easily withstands daily high-pressure washdowns. However, for high-risk zones or cleanrooms deploying aggressive sanitizers like vaporized hydrogen peroxide (VHP), upgrading to marine-grade 316L stainless steel is mandatory. While the initial investment is higher, 316L decisively resists the harsh chemical pitting and corrosion that would eat through standard 304 steel within a few years. The surface must remain flawlessly smooth, completely devoid of cracks or crevices where bacteria can hide. 2. The Insulation Core: Thermal Efficiency Meets Fire Safety For the vast majority of food plant cold rooms, Polyisocyanurate (PIR) foam is the undisputed smart choice. Premium PIR boasts an exceptionally low thermal conductivity of 0.018–0.020 W/m·K alongside a strict B1 fire rating. This delivers vastly superior insulation and significantly slower flame spread compared to standard PU foam. Whether you are storing frozen meat, deep-sea seafood, or ice cream at -18°C or below, PIR locks in temperature stability, preventing your heavy-duty compressors from burning out through non-stop operation. For specific fire-sensitive zones where local codes demand 100% non-combustible materials, high-density rock wool (Class A1) is the ultimate solution. Because rock wool insulates slightly less efficiently than PIR, panel thickness must be increased to achieve the target R-value. 3. Panel Thickness: Matching Specs to Operating Temperatures Panel thickness must be strictly calculated based on your target operational temperature: Chillers (+2°C to +5°C): 100mm thickness required. Standard Freezers (-18°C): 120mm to 150mm thickness required. Deep Blast Freezers (≤ -25°C): 150mm to 200mm thickness required. Under-specifying thickness guarantees a perpetual nightmare of surface condensation, ice buildup, and bleeding energy bills. Over-specifying simply wastes capital on unnecessary material. 4. Joint Integrity: Sealing Out Bacteria and Cold Loss Never overlook the panel joints. Cold air and microscopic bacteria will ruthlessly exploit any gap. Premium food-grade panels rely on deep, precision-milled tongue-and-groove edges. During installation, every single joint must receive a continuous, unbroken bead of specialized flexible sealant engineered to remain permanently pliable at sub-zero temperatures. The panel edges themselves must be fully protected during shipping and erection, as hidden dents and scratches inevitably transform into creeping rust spots and un-cleanable bacterial traps.

The sandwich panel factory building is a refined enclosure system, and 80% of the problems are caused by irregular installation. Common problems during the installation process are as follows: 1. Improper tightening of screws, causing chronic water leakage Self-tapping screws and EPDM waterproof washers are key waterproof nodes. If the screws are tightened too loosely, the gasket cannot fully fit the board surface, and tiny gaps will appear, allowing rainwater and moisture to slowly penetrate into the board core; if the screws are tightened too tight, the board surface will be crushed and the core material will be squeezed and damaged, causing the gasket to be permanently deformed and lose its waterproof performance. Many projects begin to seep water and have uneven board surfaces after half a year of use. This is basically caused by improper screw torque control. 2. The seams between the panels are not properly sealed and there is no complete vapor barrier. Some construction teams only rely on tongue-and-groove splicing of boards, omitting sealants and waterproofing auxiliary materials. The seemingly tight seams are actually full of tiny gaps. Especially in cold storage, slaughterhouses, and water-washed clean areas, moisture will continue to penetrate into the core of the board, causing the insulation layer to fail to absorb water, causing the board to become moldy and breed bacteria. In severe cases, it cannot pass the HACCP health acceptance. Insufficient overlap length of roof panels and glue faults are the number one causes of roof leakage. 3. Neglecting cold bridge treatment, serious condensation in cold storage This is the most fatal mistake in cold storage projects. In many construction sites, the panels are installed directly against the steel purlins and steel columns without adding heat insulation pads. Metal conducts heat very quickly, forming a large number of cold bridges. The temperature difference between inside and outside is conducted rapidly, causing frequent condensation and dripping on walls and ceilings. Not only does it increase the power consumption of the cold storage, but long-term water accumulation can also cause the steel plates to rust and the core materials to become damp and aged, significantly reducing the overall thermal insulation performance. 4. The installation direction of the roof panel is reversed and drainage fails. Roof panels must be laid strictly in the water direction from the eaves to the ridge. Reverse installation will directly block the flow of rainwater, causing rainwater to pour back and accumulated water to flow into the seams of the boards. If the ribbed roof panels are installed upside down, the panels will not be able to drain naturally. Long-term water accumulation will accelerate the aging and corrosion of the paint surface and shorten the service life of the panels. Confusing the installation sequence will also lead to uneven joints and reduced sealing. 5. Random cutting on site will destroy the edge sealing structure of the board. Random cutting of panels at door and window openings and corners will destroy the original factory sealing and edge sealing, causing the core material to be directly exposed. Once the incisions of rock wool and PIR boards are not subjected to secondary sealing treatment, they are easily susceptible to moisture absorption, delamination, and degumming, resulting in local insulation failure and a decrease in fire protection level, seriously affecting the overall project quality.   Sandwich Panel Project, Standardized screw fastening, sealing technology, cold bridge partitions, downstream installation, and incision protection can truly ensure that factories, cold storage, and clean workshops will not leak, condensate, or mold for a long time, making the project stable and durable.

The certifications held by a sandwich panel manufacturer serve as a key indicator of product quality, regulatory compliance, and corporate capability. Requirements vary depending on the application scenario, but the essential certifications generally fall into three categories: foundational management system certifications, product-specific certifications, and international export certifications.   Foundational management system certifications form the basis of compliant operations. Key certifications include ISO 9001 (Quality Management System), ISO 14001 (Environmental Management System), and ISO 45001 (Occupational Health and Safety Management System). These three certifications cover the control of the entire production process—ensuring consistent product quality and environmentally safe production—and serve as a basic threshold for domestic project procurement; without them, it is difficult for a company to guarantee product consistency.   Product-specific certifications are crucial for ensuring sandwich panels meet project requirements. Fire safety certification is paramount; products must comply with the GB 8624 standard and possess corresponding fire-rating test reports. For Class A non-combustible panels, additional fire-resistance limit test reports are required—a mandatory stipulation for commercial projects and industrial facilities. Next is Green Building Material certification; certified products receive priority in government-funded engineering works and green building projects, aligning with current policies on building energy efficiency. Additionally, for specialized environments such as clean rooms and cold storage facilities, specific certifications regarding cleanliness levels and thermal insulation performance are required.   International export certifications are essential for expanding into overseas markets. Exports to the EU require CE certification based on the EN 14509 standard, covering comprehensive requirements for product performance and safety. Exports to the US and similar regions may benefit from FM certification to enhance product recognition, while exports to Australia require AS1530 and Code Mark certifications. Certain regions also mandate compliance with local standards—such as Russia's GOST certification—to ensure smooth customs clearance and adherence to local engineering requirements.   In summary, a high-quality sandwich panel manufacturer must hold foundational system certifications, product-specific certifications, and relevant international certifications. When procuring materials, it is essential to verify the authenticity and validity of these certificates to prevent project acceptance issues caused by incomplete qualifications.  

The Sandwich panels are widely used in food processing factories due to their excellent thermal insulation, good moisture and water resistance, corrosion resistance, and excellent fire resistance.     1. Excellent thermal insulation performance. Generally, the thermal conductivity of PU/PIR sandwich panels is between 0.020 and 0.024 [W/(m·K)], providing good thermal insulation and effectively controlling indoor and outdoor temperatures to ensure food freshness.   2. Seamless splicing during assembly ensures good sealing, reducing the risk of bacteria and mold growth and enabling dust-free workshops.   3. The core material used in sandwich panels has a high closed-cell rate, is non-absorbent, and offers excellent waterproof and moisture-proof performance, ensuring food freshness.   4. The color-coated steel plates used in sandwich panels have high structural strength, strong load-bearing capacity, and good corrosion resistance.   5. Sandwich panels generally have a fire rating of B1 (PIR sandwich panels) or A (rock wool sandwich panels), offering excellent fire resistance and making them more suitable for high-temperature food processing workshops;   6. Sandwich panels are produced in modular form, requiring only on-site installation and splicing, resulting in simple construction, short construction period, less dust, and high cost-effectiveness.