Engineered for HVAC, ultra-low temperature cryogenic plants, and acoustic noise reduction.
In modern industrial and commercial infrastructure design, thermal efficiency is no longer merely an operational budget item—it is a critical regulator of environmental sustainability and regulatory compliance. Flexible closed-cell elastomeric foam represents the gold standard for applications requiring strict prevention of condensation, protection against Corrosion Under Insulation (CUI), and acoustic control.
Globally, the demand for flexible insulation is driven by two main sectors: high-density HVAC system deployment in sustainable architecture and demanding process control in cryogenic systems (LNG transport, petrochemical refinement, and ultra-low temperature storage). The physics of closed-cell foam relies on locked nitrogen micro-cells, preventing convective heat flow and water vapor migration without requiring additional exterior vapor barriers.
| Insulation Parameter | NBR/PVC Elastomeric | Traditional Fibrous |
|---|---|---|
| Thermal Conductivity (λ) | ≤ 0.034 W/(m·K) @ 0°C | ~0.040 W/(m·K) @ 0°C |
| Vapor Permeability (μ) | ≥ 10,000 | < 5 (Requires barrier) |
| Operating Temperature | -40°C to +105°C (Cryo special to -200°C) | Up to +450°C |
Decades of manufacturing expertise, leading China’s green building material innovation.
Kingflex Insulation Co., Ltd. is a premium, professional manufacturing and trading combo specializing in high-performance thermal insulation products. Located in the well-known capital of green building materials in Dacheng, China, Kingflex operates as an energy-saving, environmentally friendly enterprise focusing on the Research & Development, production, and worldwide distribution of advanced insulation systems.
In all operations, Kingflex adopts energy conservation and consumption reduction as core design requirements. We deliver holistic engineered insulation solutions through personalized design consultations, R&D trials, automated manufacturing, on-site installation guidance, and dedicated post-sale support. Through this structured approach, we lead the global building materials industry in product reliability and project safety.
Established by the renowned Jinwei (Kingway) Group, which carries a rich history of over 40 years. Founded in 1979, the group was the pioneer manufacturer of thermal insulation materials north of the Yangtze River, paving the way for China's modern insulation sector.
Kingflex is powered by a tight-knit, highly skilled team. We house 8 professional engineers in the R&D Department, 6 certified international trade representatives, and 230 technicians and operators managing the production plant.
Unlike generic manufacturers, Kingflex implements complete batch traceability. Our materials are tagged and tracked from the chemical raw material feed down to the final extrusion profile, assuring our international buyers of absolute compliance.
Our facility operates at high precision, catering to major state-level energy ministries and commercial demands.
Presently, Kingflex runs 5 large automatic assembly lines, generating an annual production capacity exceeding 600,000 cubic meters. Because of our strict quality benchmarks and high output capability, we have earned the designation of a key supplier for the Ministry of Energy, the Ministry of Electric Power, and the Ministry of Chemical Industry.
Our formulation is optimized to produce a highly uniform cellular matrix, ensuring a closed-cell rate above 98%. This reduces thermal bridging effects and ensures consistent insulating values over decades of application.
From standard building utility pipelines to ultra-low temperature cryogenic environments.
Designed for high-performance split A/C and central chiller piping systems.
Special protective outer skin preventing acidic vapor and chemical damage.
High elasticity ratio for clean bend installations and complex angles.
Industry standard closed-cell formulation for commercial HVAC design.
Premium density and flexibility, preventing heat transfer in plumbing systems.
High thermal resistance index, optimized for variable refrigerant flow (VRF).
Integrated multi-layer sheet system matching broad industrial mandates.
Specially treated formulation to withstand low-temp contraction cycles.
Engineered for LNG lines down to -200°C, offering durable structure.
Maintains flexibility and prevents thermal shock cracking in gas processing.
High density structured board designed for fire block and thermal delay.
Flexible high-temperature insulation blanket for complex exhaust machinery.
| Material Blend | Premium NBR/PVC Formulation |
| Thickness Range | 6mm to 50mm |
| Material Density | 40 - 55 kg/m³ |
| Service Temperature | -40℃ to 105℃ |
| Cellular Structure | Closed-cell rate ≥ 98% |
| Material Blend | Premium NBR/PVC Formulation |
| Wall Thickness | 9mm to 40mm |
| Internal Diameter (ID) | 6mm to 114mm |
| Moisture Resistance | High resistance factor (water vapor transmission) |
| Coating Process | Even automated spray application |
How localized manufacturing advantages ensure competitive lead times and cost mitigation.
The global construction material supply chain faces consistent pressures, including fluctuating raw material costs, freight delays, and strict testing protocols. Operating from Dacheng, China—the central hub of eco-friendly construction materials—Kingflex leverages strong localization advantages.
Our proximity to petrochemical raw material suppliers ensures consistent pricing and reduces the transport lag of essential chemicals. Furthermore, by running 5 automated extrusion foaming lines, we minimize labor overheads while keeping defect rates extremely low. Our high capacity ensures that bulk orders are handled efficiently, maintaining short production runs compared to smaller workshops.
In global trade, shipping volume is a key variable. Kingflex optimizes container load factors by using advanced vacuum-packing and compact rolling techniques, allowing buyers to import up to 40% more product volume per container. This significantly lowers overall logistics costs.
Delivering reliable thermal and acoustic control in high-performance structures globally.
Kingflex insulation materials are applied in complex, high-demand installations where thermal failures can lead to significant cost overruns. Our elastomeric foam sheet rolls and pipes are regularly specified for:
Verified standards of quality, safety, and fire prevention across target markets.
British standard compliance for fire propagation & flame spread prevention.
European structural safety approvals for insulation materials.
Ensuring chemical safety, zero halogen risk, and environment safety.
Flammability testing, smoke density, and index values rating.
Key criteria for procurement departments, project managers, and specifiers in 2025.
When selecting flexible insulation, fire propagation performance is critical. Ensure your supplier complies with BS 476 Part 6 & 7 (Class 0 and Class 1) or ASTM E84 (flame spread index < 25, smoke developed index < 50). These standards guarantee that under thermal attack, the material restricts flame spread, supporting safe emergency exit times.
For cold water lines, condensation control is a primary design driver. As warm, humid air contacts cold pipe surfaces, water droplets form, which can compromise thermal values and cause CUI. Closed-cell elastomeric foam prevents this through its high water vapor resistance factor (μ ≥ 10,000), eliminating the need for an external vapor barrier.
NBR/PVC blends are standard for indoor commercial HVAC applications due to their balance of flexibility, cost, and high moisture resistance. For outdoor applications with high UV exposure, EPDM insulation or specialized protective jackets (like Kingflex Corrosion Resistant line) should be specified to prevent degradation from sun and weathering.
"Procurement managers must verify third-party certified test reports (e.g., SGS, TÜV, or Intertek) rather than relying solely on factory-declared sheets to avoid risk on major commercial projects."
Get professional answers about technical specifications, application methods, and custom requirements.
Engineered for durability, low thermal conductivity, and rapid installation.
Kingflex