Kingflex
Kingflex
Explore our industrial thermal insulation tubes, cryogenic barriers, and high-performance elastomeric foam sheets engineered for maximum thermal resistance.
Modern engineering designs mandate thermal and condensation control barriers that perform reliably over decades. Closed-cell Nitrile Butadiene Rubber (NBR) merged with Polyvinyl Chloride (PVC) forms the benchmark for modern flexible elastomeric foam (FEF).
As heavy industry shifts toward energy-efficient infrastructure and lower carbon footprints, our NBR/PVC insulation lines deliver key properties: an ultra-high water vapor diffusion resistance factor (μ ≥ 10,000) and exceptionally low thermal conductivity (λ ≤ 0.034 W/m·K at 0°C). This ensures building envelopes, mechanical systems, and process piping retain energy without thermal bridging.
Unlike open-cell alternatives, our over-98% closed-cell configuration blocks liquid water penetration. This prevents Corrosion Under Insulation (CUI), a hidden problem that costs the global process industry billions annually in pipeline failure repairs.
Kingflex Insulation Co., Ltd. represents the synthesis of a professional manufacturer and trading powerhouse. Headquartered in Dacheng, China—the globally recognized capital of green building materials—our operations combine clean-room scientific research with large-scale industrial output.
Established under the Jinwei Group, which holds a 40-year legacy of industrial leadership since its founding in 1979 as the pioneer of northern thermal insulation materials, Kingflex has modernized the regional supply pipeline. Our production floor features 5 state-of-the-art automatic extrusion and foaming lines, generating over 600,000 cubic meters of high-density elastomeric material annually.
Physical properties and testing certification matrices for Kingflex NBR/PVC closed-cell elastomeric foam formulations.
| Property Parameter | NBR/PVC Sheets & Rolls Value | NBR/PVC Pipe & Tubes Value | Test Standard References |
|---|---|---|---|
| Thermal Conductivity (λ) | ≤ 0.034 W/(m·K) at 0°C | ≤ 0.033 W/(m·K) at 0°C | ASTM C518 / ISO 8301 |
| Water Vapor Permeability | μ ≥ 10,000 (Resistance Factor) | μ ≥ 10,000 (Resistance Factor) | ASTM E96 / BS EN 12086 |
| Flammability & Fire Rating | Class 0 / Class 1; Self-extinguishing | Class V-0, Class 1 | BS 476 Part 6/7, UL94, GB 8624 |
| Service Temperature range | -40°C to +105°C | -40°C to +105°C | ASTM C534 |
| Density Limits | 40 - 55 kg/m³ | 42 - 58 kg/m³ | ASTM D1622 / ISO 845 |
| Compression Resilience | Over 80% recovery under test loads | Over 80% recovery under test loads | ASTM D1667 |
| Ozone & UV Resistance | Excellent, long-term degradation resistance | High aging resistance in ambient light | ASTM D1149 |
Our formulations undergo rigorous testing in accredited third-party laboratories. Kingflex products are fully compliant with BS 476, CE, REACH, ROHS, UL94, and ASTM standards, simplifying international procurement for projects with strict specifications.
We support customized OEM sizing to accommodate unique piping configurations. Sheet rolls are available in thicknesses from 6mm to 50mm, and insulation pipes feature inner diameters ranging from 6mm to 114mm with custom jackets.
For critical infrastructure such as rail transit, passenger vessels, and healthcare cleanrooms, we offer specialized halogen-free variations. These formulations eliminate toxic smoke hazards in the event of a fire, protecting both personnel and sensitive electronics.
B2B logistics networks, optimized packaging, and global export support tailored for international distributors and contractors.
Operating across 66 countries requires a robust logistics framework. Our factory in Dacheng coordinates with major logistics hubs in Tianjin and Qingdao to ensure reliable international shipping.
We optimize container loading through vacuum-packing techniques, allowing clients to fit up to 30% more elastomeric product volume per 40HQ container, lowering ocean freight costs per cubic meter.
We provide full submittal documentation for international project bids. This includes fire test certifications, thermal calculations, MSDS profiles, and sample validation kits, helping you navigate complex tender requirements.
How Kingflex is aligning with next-generation green building regulations and international carbon reduction mandates.
transitioning all production lines to advanced water-blown and CO2 blowing agents to eliminate CFC and HCFC ozone hazards.
Reducing global warming potential markers by incorporating renewable bio-polyols into our core NBR/PVC polymer blend.
Optimizing curing processes to achieve GREENGUARD Gold equivalent standards, ensuring compliance with indoor air quality requirements.
Integrating fiber-reinforced protective skins directly onto NBR tubes to prevent physical damage on heavy industrial construction sites.
A reference guide to selection metrics, material composition, and key application areas for sheet rolls and pre-formed tubes.
Material: NBR/PVC Blend
Thickness Range: 6mm - 50mm
Density: 40 - 55 kg/m³
Service Temp Limit: -40℃ to 105℃
Material: NBR/PVC Blend
Thickness Range: 9mm - 40mm
ID (Inner Diameter): 6mm - 114mm
Density: 40 - 55 kg/m³
Service Temp Limit: -40℃ to 105℃
Chilled water lines, condenser systems, air distribution ducts, and refrigeration lines to prevent condensation and optimize efficiency.
Insulation, noise reduction, and corrosion prevention for chemical processing facilities, hot/cold water pipes, and storage tanks.
Acoustic and thermal insulation for walls, roofs, basement envelopes, and mechanical shafts in hospitals, malls, and hotels.
Ultra-low temperature insulation for cold chains, dry ice operations, and thermal control liners in rail cars and marine vessels.
Our products are installed in commercial and industrial projects worldwide. Here is a look at our site integrations and logistics deliveries.
Technical guidance and answers to common specification questions from HVAC consultants, design engineers, and commercial contractors.
A1: It is primary specified for HVAC duct systems, chilled water lines, split system air conditioning pipes, building thermal envelopes, industrial cold storage lines, and acoustic dampening. The closed-cell structure prevents warm air from reaching chilled lines, eliminating condensation risk.
A2: Yes. Our formulations are engineered with flame retardants, allowing them to pass stringent standards such as BS 476 (Class 0 and Class 1), UL94 (Class V-0/HF-1), and ASTM E84, ensuring they meet fire code requirements for commercial and public buildings.
A3: NBR/PVC features a closed-cell matrix that acts as a built-in vapor barrier, making it highly effective for cold-insulation and HVAC applications. Rock wool has an open fibrous network that is ideal for high-temperature applications (+120°C to +800°C) and fire barriers, but it requires a separate vapor barrier to prevent moisture absorption.
A4: Yes, we provide full OEM support. We can custom-extrude pipes to match specific inner diameters, manufacture custom thicknesses up to 50mm, and apply specialized foil or adhesive backings to meet project requirements.
A5: Our factory operates under ISO 9001 and ISO 14001 management systems. Our product lines hold certifications including BS 476, CE, REACH, RoHS, UL94, and ASTM, providing the necessary documentation for global bids.
A6: Yes. Every batch from our 5 automatic assembly lines is assigned a unique batch tracking number. We retain reference samples and record QC test results for thermal stability, density, and cell structure consistency for each shipment.
A7: Under standard operating conditions (-40°C to +105°C) and with proper installation, our materials have an expected service life of 10 to 15 years. Using protective coatings or jackets in outdoor applications can extend this lifespan further.
A8: By sealing out ambient moisture and water vapor, the closed-cell structure keeps the pipe surface dry. The absence of water prevents the oxidation cycle on metal pipes, reducing the risk of CUI compared to open-cell or fibrous insulation materials.
Explore our full range of solutions, including pre-formed tubing, sound insulation, and specialized rock wool cores.
We focus on quality and environmental responsibility. Our manufacturing plant operates under ISO 9001 and ISO 14001 guidelines to ensure clean production processes.
Each production run undergoes testing for density consistency, dimensions, and closed-cell percentage before shipping, ensuring reliable performance on site.
We work closely with global logistics partners to manage customs clearance and shipping schedules, keeping projects on track.
