Kingflex
Browse our premium range of elastomeric insulation tubes, sheets, and cryogenic solutions engineered to prevent thermal bridging and vapor penetration in extreme HVAC environments.
In modern structural design, energy efficiency and moisture control form the cornerstone of building lifecycle management. High-performance closed-cell elastomeric rubber foam has emerged as the definitive global standard for insulating HVAC lines, chiller systems, and cryogenic processing installations. By forming an impenetrable barrier against heat convection and vapor transmission, these materials safeguard infrastructure from corrosion under insulation (CUI).
As global warming triggers extreme temperature variations, HVAC networks operate under unprecedented thermal stress. Without robust thermal insulation, refrigerant lines suffer massive thermal loss, causing high energy draws and system failures. Industrial pipelines operating down to -200°C require complex thermal systems. Flexible nitrile-based elastomeric systems are shifting from typical building applications to critical duties in cleanroom setups, industrial complexes, and marine environments.
Deploying large-scale infrastructure projects requires reliable, certifiable insulation materials delivered on schedule. Partnering with a leading Chinese thermal specialist provides concrete strategic benefits.
Operating five advanced automated assembly lines enables a continuous annual output exceeding 600,000 cubic meters. This massive scale ensures predictable lead times even during high seasonal demand.
Every batch complies with rigorous international testing frameworks, including BS 476 fire safety protocols, CE marks, REACH chemical regulations, RoHS compliance, UL 94 flammability classes, and ASTM standards.
From varying wall thicknesses (6mm to 50mm) to customized pipe inner diameters (6mm to 114mm), our engineers offer expert consultation, tailored raw material formulations, and clear installation guidance.
Different projects pose distinct physical challenges. Our elastomeric materials are engineered for targeted thermodynamic requirements.
In hotels, shopping complexes, and hospital complexes, Kingflex insulation prevents condensation on chilled water pipes and ductworks. The integrated structure controls moisture and reduces ambient noise from mechanical operations.
Specifically formulated for extreme cold setups down to -200°C. Essential for LNG transport, pharmaceutical production, cleanroom processes, and liquid nitrogen piping where preventing ice formation is critical.
Resistant to chemical exposure, UV rays, and physical wear. Protects pipelines in petrochemical sites, power generation stations, and wastewater treatment plants from corrosion and ambient temperature loss.
Review the performance standards of our primary elastomer and NBR/PVC formulations.
| Property / Characteristic | Kingflex Standard Sheet Roll Specification | Kingflex Standard Pipe Insulation Specification |
|---|---|---|
| Base Material Matrix | NBR (Nitrile Butadiene Rubber) / PVC Blend | NBR (Nitrile Butadiene Rubber) / PVC Blend |
| Thickness Availability Range | 6mm to 50mm | 9mm to 40mm |
| Inner Diameter (ID) Range | N/A (Flat Sheet Form) | 6mm to 114mm |
| Bulk Density | 40 - 55 kg/m³ | 40 - 55 kg/m³ |
| Continuous Service Temperature | -40°C to 105°C (Up to -200°C for Cryogenic line) | -40°C to 105°C (Up to -200°C for Cryogenic line) |
| Thermal Conductivity (λ) | ≤ 0.035 W/(m·k) at 0°C | ≤ 0.035 W/(m·k) at 0°C |
| Closed-Cell Content Ratio | Over 98% uniformly distributed cells | Over 98% uniformly distributed cells |
| Elastic Compression Resilience | > 80% recovery after stress relief | > 80% recovery after stress relief |
| Fire Behavior Profile | Flame retardant, self-extinguishing (BS 476 Class 0/1) | Flame retardant, self-extinguishing (BS 476 Class 0/1) |
Kingflex Insulation Co., Ltd. operates as a specialized manufacturing and trading consortium for thermal insulation systems. Our central research and development hub is situated in Dacheng, China—a recognized region for green building material innovation. Kingflex focuses on eco-efficient research, high-yield production, and comprehensive sales distribution.
Our foundation is backed by the Jinwei Group, established in 1979. With over 40 years of industrial experience, Jinwei Group was a pioneer in thermal insulation production north of the Yangtze River. Today, Kingflex builds on this expertise, offering engineered insulation packages that include pre-sale consultation, custom R&D, quality control, and after-sales support.
We invest in chemical analysis and thermodynamic simulation to verify performance under high moisture and extreme temperature conditions.
A reliable supplier relies on the expertise of its team. Kingflex operates with a shared dedication to technical precision and professional client service.
Our organization employs eight specialized chemical and materials engineers in our R&D division, six international sales managers handling global logistics, and 230 factory workers operating our automated production systems.
Our materials are tested by third-party testing bodies to ensure compliance with global fire safety and environmental codes.
Effective communication helps minimize order errors. Our sales representatives are trained in material science to assist buyers with technical specifications and local import regulations.
We provide design engineers with complete documentation, including thermal calculation models, fire performance certifications, and environmental product declarations (EPDs) required for LEED projects.
We prioritize transparency. Here are verified communications and order confirmations from our international clients.
Our insulation materials are installed in industrial systems, commercial HVAC setups, and cryogenic pipelines globally.
We maintain strict process controls from chemical compounding to final curing and packaging.












Selecting insulation requires evaluating ambient relative humidity, line design temperatures, and local regulatory requirements.
Unlike fibrous insulations like fiberglass or rock wool, which require an external vapor barrier jacket, NBR/PVC elastomeric rubber has a closed-cell structure with a high water vapor resistance factor (μ ≥ 10,000). Water vapor cannot easily penetrate the material, preventing moisture accumulation and preserving the installation's thermal efficiency over time.
When moisture enters thermal insulation, the thermal conductivity increases because water is significantly more conductive than air. Closed-cell rubber foam prevents this moisture-related degradation, protecting carbon and stainless steel piping from corrosion under insulation (CUI).
Building fire safety is a critical design priority. Kingflex materials are engineered with flame retardants to meet BS 476 Class 0 and Class 1, and UL 94 V-0 standards. During fire exposure, the material limits flame propagation, generates minimal smoke, and self-extinguishes once the ignition source is removed.
Modern HVAC systems account for up to 40% of a commercial facility's total energy consumption. High-performance insulation reduces heat transfer in HVAC networks, directly lowering energy costs and greenhouse gas emissions. Kingflex products are CFC/HCFC-free and dust-free, contributing to indoor air quality and earning points for LEED certification.
We use heavy-duty protective packaging to ensure materials arrive undamaged at international destinations.

















Find answers to common questions about selection, installation, flammability standards, and custom formulations.
Browse our specialized elastomeric plates, cryogenic systems, and high-density acoustic solutions.
Detailed configurations for our core insulation products.
Explore our range of engineered insulation tubes, sheets, and industrial rock wool systems.
Contact our engineering team to request customized pricing, material samples, and design advice for your piping and duct insulation projects.
Request a Custom Quote