Engineered to prevent heat gain/loss, control condensation, and deliver absolute thermal reliability across complex pipe networks.
Years of Industrial Legacy
Annual Capacity (m³)
Exporting Countries
Automated Production Lines
Large-diameter pipelines form the circulatory system of modern heavy industries, handling fluid transmissions ranging from cryogenic media (-196°C to -40°C) to high-temperature process steam. Without proper thermal barriers, these pipelines suffer from massive energy waste, condensation, and corrosion under insulation (CUI). Our industrial closed-cell nitrile-butadiene rubber (NBR) and polyvinyl chloride (PVC) formulations address these issues directly, matching the strict thermodynamic mandates of today's energy-efficiency regulations.
As the international community prioritizes carbon neutrality and strict ESG tracking, the HVAC and industrial process piping sectors are moving away from open-cell structures. In high-humidity commercial structures, District Cooling Systems (DCS), and offshore oil fields, the demand for pre-fabricated, low-conductivity flexible foam insulation wrap is increasing. These NBR/PVC structures stand out for their low thermal conductivity (λ ≤ 0.034 W/(m·K) at 0°C) and resistance to water vapor transmission, offering dependable performance where traditional fiber insulation is prone to moisture saturation and failure.
Verified technical parameters for our NBR/PVC elastomeric thermal insulation systems.
| Physical / Chemical Property | NBR/PVC Elastomeric Foams | Test Criteria & Standards |
|---|---|---|
| Thermal Conductivity (K-Value) | ≤ 0.034 W/m·K at 0°C (0.24 Btu·in/hr·ft²·°F) | ASTM C518 / ISO 8301 |
| Water Vapor Permeability (μ) | ≥ 10,000 (Built-in Vapor Barrier) | BS EN 12086 / ASTM E96 |
| Service Temperature Limit | -40°C to +105°C (Specialized formulations down to -196°C) | ASTM C411 / EN 14706 |
| Fire & Smoke Propagation | Class 0 (BS 476 Part 6/7), V-0 (UL94), Class 1 (ASTM E84) | BS 476, UL 94, ASTM E84 |
| Material Density Range | 40 - 55 kg/m³ (Uniform micro-cellular structure) | ASTM D1622 / ISO 845 |
| Compression Recovery Rate | ≥ 80% resilience recovery | ASTM D1056 |
Kingflex Insulation Co., Ltd. is an established, high-capacity manufacturer specializing in thermal and acoustic insulation systems. Located in Dacheng, China—a hub for energy-saving green building materials—our operations combine direct manufacturing and international trade. We offer complete insulation solutions, providing pre-sale consultation, custom R&D, structural design, installation guidance, and post-sale technical support.
Operating 5 automated extrusion assembly lines, we produce over 600,000 cubic meters of high-density elastomeric material annually. This scale makes us a recognized supplier for national energy, power, and chemical systems. Over the past 16 years, our product range has expanded to cover project requirements in more than 66 countries across North America, Europe, Southeast Asia, and the Middle East.
Our materials undergo regular testing to meet strict international standards, including BS 476 (Class 0), CE marking, REACH chemical safety compliance, RoHS directive restrictions, UL94 flammability ratings, and ASTM technical specifications. This testing confirms the reliable fire safety and low environmental impact of our insulation systems when used in high-occupancy commercial projects and industrial facilities.
Established under the Jinwei Group, which has a 40-year legacy starting in 1979 as a pioneer of thermal insulation materials in northern China, Kingflex relies on a structured workforce. Our division includes 8 specialized research engineers, 6 international sales consultants, and 230 technicians in our production facilities.
Direct engineering data for structural layouts and installation configurations.
| Material | NBR / PVC Blended Copolymer |
| Thickness Range | 6mm - 50mm |
| Density | 40 - 55 kg/m³ |
| Temperature Range | -40°C to +105°C |
| Closed-Cell Rate | ≥ 98% for consistent thermal insulation |
| Compression Recovery | ≥ 80% resilience under stress |
Common Applications: Air ducts, high-diameter fluid headers, industrial tanks, marine bulkheads, and cleanroom environments.
| Material | NBR / PVC Blended Copolymer |
| Thickness Range | 9mm - 40mm |
| Inner Diameter (ID) | 6mm - 114mm (Supports standard steel/copper pipes) |
| Density | 40 - 55 kg/m³ |
| Temperature Range | -40°C to +105°C |
| Application Benefit | Helps prevent freezing and cracking in outdoor runs |
Common Applications: Chilled water networks, domestic hot/cold water piping, condenser units, and chemical process piping.
Tested and proven in high-demand construction, district energy, chemical processing, and cryogenic storage facilities.
We maintain full batch traceability from raw material selection to extrusion, curing, and global shipment. Our production records are archived to assist project audits, and client feedback screens illustrate the responsive, technically-driven communication we maintain with global procurement teams.
With an annual output exceeding 600,000 cubic meters, Kingflex maintains consistent supply capacity for large infrastructure projects. Our facilities support prompt dispatch through integrated container logistics, preventing delays in global supply chains.
Answers to common technical and engineering questions about flexible NBR/PVC and cryogenic insulation wraps.
A: It is primarily used for insulating HVAC ducts, air conditioning lines, hot and cold water pipes, and industrial processes. Its closed-cell structure prevents condensation on chilled lines and reduces heat loss in higher-temperature systems, protecting metal pipes from corrosion under insulation (CUI).
A: Yes. Our elastomeric formulations include flame retardants that meet Class 0 (BS 476 Part 6 & 7), Class 1 (ASTM E84), and V-0 (UL 94) requirements. The material is self-extinguishing and does not produce flaming droplets, contributing to passive fire safety in commercial and industrial settings.
A: Elastomeric rubber foam is a flexible, closed-cell material with an integrated vapor barrier, making it highly resistant to moisture ingress without requiring a separate jacket. It is ideal for refrigeration and condensation control. Rock wool is a fibrous material suited for high-temperature applications and specialized acoustic setups, but it requires an external vapor barrier to prevent moisture absorption in cold environments.
A: Yes, we provide OEM and ODM services. We can adjust density, thickness, inner diameter, thermal parameters, and sheet formats to meet specific industrial specifications and project requirements.
A: Our products are certified under BS 476, CE, REACH, RoHS, UL94, and ASTM. Testing is performed by accredited third-party laboratories to verify compliance with international building and safety standards.
A: Yes. Every production run undergoes quality control logging. Materials are tracked from raw chemical formulation through extrusion and curing to the final batch number, ensuring transparency for project audits.
A: We produce sheet rolls in standard thicknesses from 6mm to 50mm. Thicker specifications can be achieved by multi-layer laminating, using specialized adhesives to maintain insulation integrity.
A: When installed according to guidelines and protected from direct weathering (or shielded with UV-resistant coatings/jackets), the system provides a service life of 10 to 15 years, maintaining stable thermal conductivity over time.
Explore our mid-temperature elastomeric foams and high-density industrial sound barriers.
Pre-slit or solid tubes for rapid HVAC retrofitting and new installations.
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High flexibility for quick installation around complex pipe bends.
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Industrial-grade pipe wrap designed to control condensation.
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Meets standard HVAC regulations for heat-loss prevention and energy saving.
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Multi-layer system designed for cryogenic pipelines and LNG facilities.
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Maintains flexibility and prevents cracking at sub-zero temperatures.
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Protects against thermal shock in industrial processing and gas transmission.
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Engineered to limit structural contraction at extreme low temperatures.
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High-density mineral fiber boards for industrial fire barriers and boilers.
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Flexible mineral wool rolls designed for large industrial vessels and tanks.
Technical DetailsTargeted solutions designed for challenging modern industrial operations.
High relative humidity can lead to condensation on chilled water pipes, which can cause CUI, mold growth, and water damage in ceiling cavities. Our closed-cell rubber foam insulation wrap prevents ambient moisture from contacting the cold pipe surface. With a water vapor diffusion resistance factor (μ) ≥ 10,000, our material maintains its thermal efficiency over long service lifetimes.
For applications involving liquified gases at sub-zero temperatures (down to -196°C), standard NBR foams can become brittle. Kingflex offers specialized Dolefin and Dienes cryogenic elastomer systems. These systems feature multi-layered structures that absorb thermal contraction stress, preventing physical cracking and vapor leaks in cryogenic facilities.
High-pressure fluid flows and mechanical vibrations generate noise in industrial pipe networks. Our high-density acoustic rubber foam boards combine thermal insulation with sound damping, helping to reduce structural and air-borne noise transmission in equipment rooms, manufacturing bays, and HVAC duct systems.
Kingflex Insulation Co., Ltd. operates with a focus on resource conservation and emission reduction. Our manufacturing processes utilize automated batching and extrusion systems, ensuring consistent material density and cell structure across all product runs. This helps control thermal conductivity and mechanical strength, minimizing material defects before delivery.
Our logistics network manages direct shipping routes to international sea and rail terminals. We provide project managers with full documentation, including test reports, certificates of compliance, and batch logs, supporting scheduled construction and installation timelines.
Every stage of our manufacturing—from foaming and curing to final cutting and storage—is monitored to ensure dimensional stability and consistent physical properties.
Detailed material configurations designed for extreme temperatures, chemical exposure, and acoustic requirements.
Closed-cell flexible elastomeric foams designed for condensation prevention and mid-temperature applications.
View Products →Lightweight glass fiber solutions suited for high-temperature ducts and wall insulation panels.
View Products →High-density mineral wool panels and blankets designed for high-temperature settings and fire protection.
View Products →Our NBR/PVC elastomeric insulation materials are produced in standard thicknesses from 6mm to 50mm, with custom variations available for specialized layouts. Standard density ranges from 40 to 55 kg/m³, which helps maintain the material's thermal properties across operating temperatures from -40°C to +105°C. For industrial process pipelines, chilled water runs, and acoustic applications, selecting the appropriate thickness is necessary to maintain system efficiency and manage condensation risks.
Kingflex
