Kingflex
Kingflex
Explore our top-tier certified range of flexible elastomeric foam insulation pipes, rolls, and specialized structural systems engineered for global HVAC&R infrastructure.
When designing thermal insulation systems for commercial high-rise buildings, public spaces, and highly regulated manufacturing industries, safety and fire prevention performance is paramount. Among various international standards, the British Standard BS 476 Part 7 defines the test methodology for assessing the lateral spread of flame along the surface of a product in the vertical position.
The classification system ranks materials from Class 1 to Class 4. Class 1 represents the highest rating in this specific test, verifying that the material experiences minimal lateral flame spread when subjected to intense radiant heat. Classifying a product under Class 1 requires that the total flame spread during the initial 1.5 minutes and the final 10 minutes of exposure stays within strictly defined physical parameters (typically not exceeding a 165mm flame travel distance under the standard's radiometer array).
Established by the renowned Jinwei Group, which boasts a rich history spanning more than 40 years since its founding in 1979, Kingflex has grown to be a premier manufacturing and trading combo for thermal insulation products. Headquartered in Dacheng, China—the recognized national capital of green-building materials—we operate at the absolute forefront of energy-saving, environmentally responsible materials development.
Jinwei Group was the pioneer manufacturer of thermal insulation materials north of the Yangtze River. Carrying this legacy, Kingflex operates with high energy-efficiency and emission-reduction principles at its core. We provide full-cycle system solutions, spanning professional engineering consultations, structural research and development, custom-tailored production, installation guidance, and lifetime post-sale support.
Kingflex is built on professional execution. The R&D department is anchored by 8 professional chemical and mechanical engineers, alongside a dedicated international support team of 6 specialist sales representatives. Our manufacturing footprint is supported by 230 highly skilled factory workers who run our state-of-the-art automated lines under strict quality protocols.
How micro-cellular engineering delivers exceptional thermal isolation, moisture barrier protection, and self-extinguishing safety profiles.
Kingflex BS 476 Part 7 Class 1 elastomeric foam relies on a sophisticated blend of Nitrile Butadiene Rubber (NBR) and Polyvinyl Chloride (PVC) compounded with high-efficiency hydrated mineral flame retardants like Alumina Trihydrate (ATH) and proprietary halogenated systems. Under flame exposure, the ATH undergoes endothermic decomposition, releasing water vapor, cooling the substrate surface, and producing a protective char barrier that limits flame spread.
With a closed-cell structural density exceeding 98%, our elastomer structures are virtually impermeable to moisture. In traditional open-cell or fibrous insulation materials, moisture ingress rapidly degrades thermal conductivity ($\lambda$). Our closed-cell structure operates as a built-in water vapor barrier, maintaining a stable thermal conductivity coefficient ($\lambda \le 0.034$ W/m·K at 0°C) over a decade-long operating lifespan.
Our material portfolio handles demanding industrial limits, operating effectively from -40°C up to +105°C (and down to cryogenic limits with specialized multi-layered systems like the Dienes system). This temperature range prevents sweating on cold-water HVAC piping and limits energy loss in medium-temperature process steam and hot water lines.
Direct from our manufacturing facility, these standard dimensional frameworks configure perfectly into international mechanical project blueprints.
Kingflex BS 476 Class 1 closed-cell elastomeric rubber foam insulation sheets and tubes provide comprehensive advantages over mineral wool or polystyrene:
From complex skyscraper projects to specialized industrial setups, our Class 1 insulation systems protect critical utilities:
Real screenshots, project photos, and industry certifications supporting Kingflex's authority and market reliability.
BS 476 Fire Testing Certificate
ISO Quality Management Certification
UL94 & ASTM Compliance Records
European CE Mark Registration
Global mechanical, electrical, and plumbing (MEP) contractors select Chinese factories for BS 476 Class 1 thermal insulation due to structural cost efficiencies and scale. Kingflex is located in Dacheng, the core insulation cluster of China. This strategic location offers unique advantages:
Raw Material Optimization: By procuring rubber bases, PVC matrices, plasticizers, and flame-retardant chemical agents directly from nearby petrochemical hubs, we eliminate complex domestic transport costs. This chemical integration allows Kingflex to maintain competitive pricing, reflected in our wholesale quotation lists.
Massive Output Scale: With 5 high-speed automatic continuous extrusion lines, we maintain production volumes that smaller regional factories cannot match. Running continuous lines lowers startup energy costs, standardizes thermal foam quality, and ensures fast delivery times for large-scale construction projects.
Advanced Testing & Traceability: Every batch of Kingflex BS 476 Part 7 Class 1 insulation is marked with an identification trace code, allowing tracking from chemical mixing and high-temperature extrusion to final packaging. Our laboratory continuously tests density, thermal conductivity, and fire spread performance to verify compliance.
Direct answers to the most common engineering and sourcing questions regarding BS 476 Class 1 elastomeric insulation.
Explore our specialty line of high-performance acoustic absorbers, cryogenic insulation barriers, and heavy-duty rock wool systems.
Review the visual product catalogue and thermal insulation options designed to prevent energy loss and pipe condensation.
Specifically engineered for cold water lines to block heat transmission and sweating.
Coated or chemically designed to resist chemical spray, acidic environments, and alkaline dust.
Features high elastic recovery, reducing mechanical wear and tear around structural vibrations.
Our main industry standard pipeline cover, trusted by commercial MEP installers.
Highly flexible compound ensuring easy installation on domestic water supply networks.
Optimized thermal performance to minimize energy loss in fan coil units and split systems.
A complete system covering joints, sealants, adhesives, and wrap tapes.
Engineered for cryogenic setups, preventing heat gain and keeping machinery functioning efficiently.
Provides durable insulation down to low-temperature ranges without cracking.
Optimized low-temperature insulation designed to handle structural shrinkage under freezing thermal loads.
Provides excellent sound isolation and high-temperature fire shielding in high-hazard structural walls.
A flexible mineral wool wrap designed for large boilers, heat exchangers, and high-temp flues.
As building regulations tighten worldwide—spurred by initiatives like the EU Green Deal and global net-zero carbon goals—the demand for high-performance fire insulation is growing. While BS 476 Part 7 Class 1 remains standard in regions like Southeast Asia, the Middle East, and the UK, manufacturers are working to reduce smoke toxicity during fires.
Kingflex's R&D team is developing next-generation halogen-free flame-retardant (HFFR) systems. These new materials aim to achieve Class 1 spread-of-flame ratings while significantly lowering smoke toxicity, aligning with upcoming environmental building codes.
Additionally, our manufacturing processes are moving toward bio-based polyols and eco-friendly blowing agents. These updates help lower the embodied carbon index of our products without sacrificing the closed-cell structure and thermal efficiency that define Kingflex insulation systems.
