Kingflex
Kingflex
Explore our elite selection of closed-cell elastomeric foam tubes, sheets, and specialized system components designed to prevent heat transfer and condensation.
In modern process industries, cryogenic applications are expanding rapidly. The global transition toward clean fuels has amplified the demand for Liquefied Natural Gas (LNG), liquid nitrogen, liquid oxygen, and liquid hydrogen storage. Operating temperatures within these storage vessels and process piping can drop down to -160°C or even -253°C. In such intense thermal environments, traditional insulation setups often struggle with stress crack propagation, environmental vapor penetration, and massive heat gain.
High-performance cryogenic tank insulation systems serve a critical purpose: ensuring safety and process stability. Without robust thermal resistance, heat leakage leads to the boil-off of valuable liquid products, creating unsafe pressure spikes. Furthermore, moisture ingress is a persistent issue. Liquid water or ice forming inside the insulation structure ruins thermal performance and accelerates Corrosion Under Insulation (CUI). This is why closed-cell elastomeric technology is essential for reliable process controls worldwide.
Understanding the thermal metrics that drive safety and performance in sub-zero applications.
Cryogenic insulation must maintain mechanical resilience and a high thermal resistance barrier under extreme temperature gradients. Closed-cell NBR/PVC elastomeric foams like the Kingflex Standard System balance flexibility, high moisture resistance, and low thermal conductivity. Compared to open-cell alternatives or rigid mineral materials, elastomer sheets resist vibration cracking and prevent ambient humidity from penetrating the insulation layer.
| Property Indicator | Kingflex Elastomeric Rubber Foam | Traditional Rock Wool / Mineral Fibers | Rigid Polyurethane Foam (PIR/PUR) |
|---|---|---|---|
| Thermal Conductivity (λ) | ≤ 0.034 W/(m·K) at 0°C | ≥ 0.040 W/(m·K) at 0°C | ≤ 0.024 W/(m·K) at 0°C |
| Closed-Cell Rate | ≥ 98% (High barrier) | Open-cell / Fibrous | ≥ 90% (Rigid structure) |
| Moisture Ingress Resistance | Excellent, built-in vapor barrier | Poor, absorbs water/humidity | Moderate, relies on external jacket |
| Vibration & Crack Resistance | High resilience (Compression recovery >80%) | Brittle fibers tend to settle | Highly prone to thermal stress cracking |
| Service Temperature Range | -40°C to 105°C (Cryogenic builds go lower) | Ambient up to 650°C | -180°C to 120°C (Requires expansion joints) |
Because elastomers maintain their flexibility down to -40°C, they absorb structural expansion and contraction without cracking. For systems running under -40°C (down to -200°C), engineered multi-layer setups are utilized. These systems feature specialized low-density inner barriers paired with flexible outer layers of NBR/PVC elastomeric foam, creating a thermal gradient that protects the outer environment from condensation and ice buildup.
Backed by 40+ Years of Manufacturing Integrity through the Jinwei Group
Kingflex Insulation Co., Ltd. is a premier manufacturing and trading combo for thermal insulation systems. Our research, development, and high-tech manufacturing center is located in Dacheng, China, widely recognized as the capital of green building materials. As an energy-saving, environmentally conscious enterprise, Kingflex focuses on energy conservation and consumption reduction in all global building and industrial operations.
Originally established by the Jinwei Group—which dates back to 1979—Kingflex carries a deep heritage of insulation manufacturing. In fact, Jinwei Group was the pioneer manufacturer of thermal insulation materials north of the Yangtze River. Today, the facility has expanded to 5 large automatic assembly lines, producing over 600,000 cubic meters annually. This capacity makes Kingflex a designated supplier for the Ministry of Energy, the Ministry of Electric Power, and the Ministry of Chemical Industry.
Why global procurers source from Kingflex's advanced industrial footprint in Dacheng.
Dacheng's industrial raw material cluster enables immediate access to premium synthetic rubbers and foaming agents. This co-location guarantees continuous supply channels, shields production from material spikes, and reduces lead times for complex international projects.
Our dedicated R&D division features eight expert materials engineers. We perform in-house tests on cell structures, fire response, and density variations to guarantee that every batch matches international project criteria before shipping.
Our products comply with BS 476, CE, REACH, RoHS, UL94, and ASTM. We offer full batch traceability across our production runs, giving international clients complete confidence in quality audits and structural approvals.
Tailored dimensions and installation parameters for mechanical and industrial setups.
Manufactured using standard NBR/PVC elastomer blends, our insulation sheet rolls are optimized for large-diameter storage tanks, chemical vessels, and HVAC air ducts. Their uniform cell structures deliver exceptional resistance to water vapor transmission and heat gain.
| Parameters | Value / Specifications |
|---|---|
| Material Composition | Premium Nitrile Butadiene Rubber / Polyvinyl Chloride (NBR/PVC) |
| Available Thicknesses | 6mm, 9mm, 13mm, 19mm, 25mm, 32mm, 40mm, 50mm |
| Density Range | 40 to 55 kg/m³ |
| Service Temperature | -40℃ to 105℃ |
| Cell Structure | Closed-cell rate over 98% |
Designed for quick, tight-fitting installation over industrial piping and HVAC conduits. Extruded with a uniform wall profile, they resist condensation and significantly reduce the risk of structural pipe corrosion.
| Parameters | Value / Specifications |
|---|---|
| Material Composition | Premium Nitrile Butadiene Rubber / Polyvinyl Chloride (NBR/PVC) |
| Inner Diameters (ID) | 6mm to 114mm |
| Available Thicknesses | 9mm, 13mm, 19mm, 25mm, 32mm, 40mm |
| Compression Resilience | Over 80% recovery rate |
| Fire Performance | Self-extinguishing, Class 0/Class 1 flame retardant |
Answers to essential technical questions regarding elastomeric, acoustic, and low-temperature thermal insulation.
Elastomeric rubber foam is a highly versatile thermal barrier. It is primarily used to isolate HVAC ducts, air conditioning lines, and domestic water pipes. In industrial contexts, it is widely specified for low-temperature process piping, cryogenic tank systems, and acoustic damping barriers, thanks to its exceptional resistance to heat gain and condensation.
Yes, all Kingflex elastomeric foams are engineered with fire-retardant additives. They meet strict fire safety regulations (such as BS 476 Class 0 and UL94 flame-retardant approvals). In fire conditions, the material resists flame spread and generates minimal smoke, making it safe for commercial high-rises and critical industrial plants.
Rubber foam is a flexible, closed-cell elastomer with built-in resistance to water vapor. This makes it ideal for cold systems and outdoor piping where moisture control is vital. Rock wool is a fibrous, open-cell mineral insulation designed for high-temperature and fire-protection systems, though it requires a separate jacketing system to prevent moisture absorption.
Yes, we provide full OEM and custom manufacturing services. We can adjust density profiles, chemical compositions (such as EPDM-based or halogen-free variants), structural wall thicknesses, and internal diameters to match specific engineering blueprints.
Our materials are certified by leading global standards organizations, including BS 476, CE, REACH, RoHS, UL94, and ASTM. This ensures compliance with regional mechanical codes across Europe, the Americas, and Asia.
Yes, every batch undergoes a strict QA assessment and is logged with a trace number. This records raw material details, production times, and physical test results, guaranteeing clear tracking and project verification.
We manufacture insulation sheet rolls in standard thicknesses from 6mm up to 50mm. For specialized low-temperature and cryogenic applications, these sheets can be layered to meet specific heat-loss limitations.
With correct professional installation and standard operating conditions, our elastomeric products deliver a service life of 10 to 15 years. Their robust closed-cell structure maintains stable thermal conductivity and prevents moisture buildup over time.
Transparent feedback and production records from our international partners.
Detailed mechanical parameters for our specialized rubber foam tubes and rock wool sheets.
Highly flexible closed-cell tube for HVAC air conditioning lines.
Specialized coating prevents CUI on chemical and oil pipeline networks.
High-resilience elastomeric profile reduces mechanical wear.
Industrial-standard cold line insulation for chillers and air systems.
Optimized density profile balances thermal and acoustic insulation.
Class 0 flame-retardant tube for commercial building projects.
Designed for ultra-low temperature and cryogenic process piping.
Multi-layer elastomeric design optimized for LNG and liquid nitrogen tanks.
Highly durable solutions for sub-zero environments, extreme cold lines, and high-temp industrial pipes.
Premium cold storage, HVAC sheet rolls, and sound dampening pads direct from the factory.
Kingflex is a trusted supplier of industrial closed-cell elastomers. Contact our engineering team for customized specifications, wholesale pricing lists, and global shipping options.
