Kingflex
Direct from DACheng Class 0 Rubber & Plastic Foam Base. Specially Engineered for Heavy Industrial and HVAC Utilities.
In the global thermal control arena, Class 0 Pipe Insulation represents the highest echelon of fire-retardant elastomeric foam technology. Rooted in British Standards (BS 476 Part 6 & Part 7), the Class 0 rating requires materials to strictly limit fire propagation and surface spread of flame. This ensures that in the event of an outbreak, the insulation does not act as an accelerant.
Produced predominantly through a high-precision chemical blend of Nitrile Butadiene Rubber (NBR) and Polyvinyl Chloride (PVC), this closed-cell compound structure blocks the transmission of heat and water vapor. With a closed-cell rate exceeding 98%, it remains the standard choice for modern HVAC, process piping, cleanrooms, and commercial structures.
Established by the Jinwei Group, which boasts over 40 years of pioneering history, Kingflex was founded on a legacy of excellence. Jinwei Group, established in 1979, stood as the first manufacturer of thermal insulation materials north of the Yangtze River. Over the decades, this operational experience has translated into refined chemical formulations, advanced vulcanization control, and reliable global compliance.
To fully appreciate Class 0 elastomeric foam, one must look at its thermal performance under variable ambient humidity. Closed-cell rubber foam isolates the transport of gas and moisture. Typical open-cell structures absorb water when cold piping drops below the dew point, causing rapid deterioration of their insulation performance. Kingflex elastomeric foam maintains an exceptionally low, stable thermal conductivity (λ ≤ 0.034 W/(m·k) at 0°C) due to the high density of microscopic, dry air cavities.
By maintaining high density control (40-55 kg/m³) and incorporating cross-linked polymeric backbones, the material retains flexibility at extreme temperature thresholds. This makes it an ideal medium for cryogenic applications (handling liquid natural gas, ethylene, or ammonia) and industrial steam lines.
| Physical Property | Testing Protocol (ASTM / BS) | Certified Value / Performance Metric |
|---|---|---|
| Thermal Conductivity (λ at 0°C) | ASTM C518 / ISO 8301 | ≤ 0.034 W/(m·k) |
| Water Vapor Permeability (μ) | BS EN 12086 / ASTM E96 | ≥ 10,000 (Built-in Vapor Barrier) |
| Fire Performance Rating | BS 476 Part 6 & Part 7 | Class 0 / Surface Spread Class 1 |
| Density Profile | ASTM D1622 | 40 - 55 kg/m³ |
| Operating Temperature limits | EN 14707 | -40°C to +105°C (Cryogenic grades down to -200°C) |
| Compression Resilience | ASTM D1056 | Over 80% recovery rate |
Located in Dacheng, the recognized capital of green-building materials in China, the Kingflex manufacturing complex integrates five large-scale automated assembly lines. With an annual output capacity exceeding 600,000 cubic meters, Kingflex has been designated as an official supplier by the Chinese Ministry of Energy, Ministry of Electric Power, and Ministry of Chemical Industry.
The Factory 4.0 model leverages real-time digital monitoring for compound mixing, continuous foaming, vulcanization, and inline dimension calibration. This degree of process control minimizes variances in cell structure, ensuring that the sheet rolls and pre-formed tubes meet consistent thermal and fire safety profiles.
Kingflex's operational capabilities are driven by our dedicated and specialized workforce. The engineering and client-success team comprises 8 professional research & development engineers, 6 international trade specialists, and 230 skilled industrial workers. Through cross-departmental coordination, we ensure that project requirements—from physical dimension tolerances to customized fire retardant formulations—are met with precision.
To maintain compliance on jobsites globally, Kingflex undergoes regular audits and has earned certifications spanning BS 476, CE, REACH, ROHS, UL94, and ASTM. These test protocols verify the safety and environmental profile of our elastomeric line, ensuring it contains no VOCs, CFCs, or formaldehyde, and carries low smoke density ratings.
Structural Comparison between Preformed Pipe Insulation and Continuous Sheet Rolls.
Ideal for flat surfaces, large-diameter ductwork, and equipment housings. Offers high flexibility for wrapping operations.
| Material | Nitrile Butadiene Rubber / Polyvinyl Chloride (NBR/PVC) |
| Thickness Range | 6mm - 50mm |
| Density | 40 - 55 kg/m³ |
| Operating Range | -40℃ to 105℃ |
| Closed Cell Rate | Over 98% for premium thermal performance |
*Available options: Self-adhesive backing, pure aluminum foil facing, and composite glass cloth protective jackets.
Designed for easy installation on copper and steel pipes, maintaining structural integrity and preventing thermal bridging.
| Material | Nitrile Butadiene Rubber / Polyvinyl Chloride (NBR/PVC) |
| Thickness Range | 9mm - 40mm |
| Inner Diameter (ID) | 6mm - 114mm (For standard pipe sizes) |
| Density | 40 - 55 kg/m³ |
| Thermal Barrier | Even coating, minimizes pipe freezing & cracking |
*Features precise inner diameter control to ensure a snug fit around pipelines, preventing air pockets and condensation risk.
Proven Performance in Industrial Installations and Positive Client Feedback Across 66 Countries.
We prioritize transaction safety and clear project communication. Below are verified screenshots of technical approvals, dimension verifications, and logistics updates from clients in the Americas, Europe, and the Middle East.
Engineering specifications often require clarification when distinguishing between Class 1 and Class 0 insulation standards. Under BS 476 Part 7 (Surface Spread of Flame), a Class 1 rating defines the lateral spread limits of flame. Class 0, however, is a higher standard that incorporates both Part 7 and Part 6 (Fire Propagation).
To meet Class 0 standard, the material must achieve a fire propagation index (I) of less than 12, and a sub-index (i1) of less than 6. For high-occupancy structures (hospitals, schools, and transportation hubs), this index rating is critical to safety, helping to limit toxic smoke emission and delay flame spread.
When procuring Class 0 insulation, procurement officers assess several key cost drivers:
Detailed technical answers addressing common queries from project engineers, acoustic specialists, and international sourcing professionals.
Explore our focused product lines designed to meet diverse industrial requirements.
From Standard HVAC Tubing to Advanced Cryogenic Protective Layers.
Designed to limit heat gains and losses, protecting residential and industrial piping.
Formulated with corrosion inhibitors to protect steel pipes from under-insulation degradation.
Highly flexible NBR-based pipe insulation that fits complex line shapes.
A standard commercial solution for domestic plumbing and HVAC lines.
Provides high-efficiency thermal performance for heating and cooling networks.
Engineered to limit heat transfer, helping to prevent condensation in variable humidity.
Complete system designed for chemical processing plants and large manufacturing utilities.
Formulated for deep-freeze and low-temperature process lines.
High-density structure built to withstand mechanical load and thermal shock.
Maintains flexibility and prevents cracking under extreme thermal conditions.
High-density stone wool boards designed for high-temperature furnace and industrial fireproofing.
Flexible rock wool wrap reinforced with mesh backing for high-temp industrial applications.
Standard NBR/PVC sheets designed for wide-area air ducts and vessel insulation.
Pre-formed tubing designed for quick installation on plumbing systems.
Complete product range supporting custom specifications and certifications.
