Kingflex
Explore our premium grade elastomeric insulation materials certified for international building and industrial projects.
Founded under the umbrella of the prestigious Jinwei Group (established in 1979), Kingflex Insulation Co., Ltd. holds the distinction of being the first thermal insulation materials manufacturer north of the Yangtze River. Based in Dacheng, China—the globally recognized capital of green-building materials—we operate as a seamlessly integrated research, development, production, and international trading enterprise.
Our core operational ethos centers on energy conservation, emission reduction, and precise thermal conductivity management. We deliver turnkey thermal and cryogenic solutions, from initial consultation and mathematical calculation verification to advanced material production, installation guidance, and global post-sale service.
600,000+ cubic meters output across 5 automatic assembly lines.
Trusted by contractors across 66 countries and regions.
Our research and development pipeline is staffed by 8 professional thermodynamic engineers who collaborate directly with global structural consulting firms. Backed by 6 specialized international trade consultants and 230 highly trained operations personnel, Kingflex maintains continuous test protocols for verifying k-values, moisture vapor permeability, and flame-retardant performance.
As a state-designated manufacturing enterprise partner to the Ministry of Energy, Ministry of Electric Power, and Ministry of Chemical Industry, our products undergo rigorous performance tracking, ensuring compliance with demanding international standards including BS 476, CE, REACH, RoHS, UL94, and ASTM.
Understanding the mathematical and environmental factors that govern thermal performance in elastomeric insulation systems.
In mechanical systems engineering, determining the correct insulation thickness ($t$) is critical to preventing surface condensation and managing heat flow. The thermal conductivity ($\lambda$, also denoted as $k$) represents the rate at which heat flows through a material. It is measured in $\text{W}/(\text{m}\cdot\text{K})$ or $\text{Btu}\cdot\text{in}/(\text{hr}\cdot\text{ft}^2\cdot^\circ\text{F})$.
To calculate the minimum thickness required to prevent surface condensation on cold pipelines, engineers utilize the following thermodynamic formula (per ASTM C680):
Where:
Because $\lambda$ fluctuates depending on the operating temperature, Kingflex tests all production batches at multiple mean temperatures. At $0^\circ\text{C}$, Kingflex NBR/PVC delivers a thermal conductivity of $\le 0.034\ \text{W}/(\text{m}\cdot\text{K})$, maintaining a highly insulating, consistent barrier over its 15-year operational lifespan.
Ensure your procurement specification matches the environmental demands:
Aligning structural engineering and environmental targets with premium closed-cell insulation technologies.
Sustainable certification programs (LEED, BREEAM) now require structural products to display EPDs (Environmental Product Declarations). Kingflex materials comply with rigorous REACH and RoHS directives to lower the overall embodied carbon index of mechanical setups.
Standard rubbers feature irregular cell dimensions. Kingflex utilizes gas-injection foaming technologies to yield a micro-cellular structure with an even cell distribution, lowering thermal conductivity while retaining structural elasticity.
Global LNG transport requires insulation that stays elastic down to -200°C. Our flexible cryogenic multi-layered systems prevent cracking under thermal stress, mitigating structural fatigue in low-temperature setups.
Compare the material properties and regulatory compliances of our leading elastomeric formulations.
| Property | Kingflex NBR/PVC Rubber Foam | Rock Wool Insulation Board | Test Standard / Reference |
|---|---|---|---|
| Thermal Conductivity (λ) | ≤ 0.034 W/(m·K) at 0°C | ≤ 0.036 - 0.044 W/(m·K) at 25°C | ASTM C518 / ISO 8301 |
| Water Vapor Permeability | Moisture Resistance Factor (μ) ≥ 10,000 | Highly Permeable (Requires Vapor Barrier) | EN 12086 / ASTM E96 |
| Operating Temperature | -40°C to +105°C (Up to -200°C for Cryogenic) | Up to +650°C | ASTM C411 |
| Fire Classification | Class 0 / Class 1, Self-Extinguishing | Non-combustible (Class A1) | BS 476 Part 6/7, UL 94 |
| Density | 40 - 55 kg/m³ | 60 - 150 kg/m³ | ASTM D1622 |
| Elasticity & Resilience | Compression Resilience > 80% | Low Elasticity (Fibrous) | ASTM C165 / ASTM D3575 |
B2B procurement programs require verifiable testing trace records. Kingflex maintains independent certification and validation paths with top-tier international laboratories. Our production workflows operate under ISO 9001 quality management structures, and all product lines undergo testing for trace metal contamination, outgassing, and environmental footprint.
Fully tested to BS 476 (Part 6 & 7), UL94, and DIN 4102.
Complies with European Union REACH and RoHS standards.
Professional answers to common technical, thermodynamic, and logistics questions concerning Kingflex products.
Elastomeric rubber foam insulation is mainly used for HVAC ducts, air conditioning pipes, building thermal insulation, industrial pipeline cold insulation, and acoustic sound insulation in multi-occupancy structures.
Yes, our rubber foam insulation sheets and tubes are engineered with flame retardants, allowing them to meet BS 476, UL94, and other international building safety and industrial fire regulations.
Rubber foam has a flexible, closed-cell, moisture-proof structure, making it ideal for condensation control in HVAC and refrigeration. Rock wool is a high-temperature resistant, non-combustible material, making it suitable for industrial high-temperature steam lines and architectural firewalls.
Yes, we provide extensive OEM/ODM support, allowing you to customize dimensions, wall thicknesses, self-adhesive backing configurations, and external protection wraps (Alu-foil, etc.) for high-abuse environments.
Our products have passed BS 476, CE, REACH, RoHS, UL94, ASTM, and other international certification processes, ensuring broad global compliance and safety validation.
Yes, each batch of Kingflex insulation sheet and tube is marked with production run numbers and traceability codes to allow tracking of raw materials and QC data.
We manufacture flexible elastomeric foam sheet rolls in thicknesses ranging from 6mm to 50mm, enabling single-layer or multi-layer thermal setups.
When installed and sealed according to our standard technical guidelines, the operational life of Kingflex elastomeric materials ranges between 10 and 15 years.
Choose from our specialized selections of piping insulation, heat-resistant tubes, and low-temperature wraps.
