Highly engineered NBR/PVC closed-cell foam sheets and tubes engineered to halt flame propagation.
In modern industrial and commercial infrastructure development, passive fire safety is non-negotiable. British Standard 476 (BS 476) specifies testing criteria to determine the fire behavior of building materials and structures. For elastomeric rubber foam insulation, two critical sub-parts dictate the regulatory performance:
BS 476 Part 7 (Surface Spread of Flame): This test measures the lateral spread of flame along the surface of a specimen oriented in the vertical position. Materials receive classifications ranging from Class 1 (lowest spread of flame) to Class 4 (highest spread of flame).
BS 476 Part 6 (Fire Propagation): This test assesses the heat release contribution of a material to a developing fire. It generates a propagation index (I) and sub-indices (i1, i2, i3). To achieve the coveted Class 0 status (as required by building regulations in the UK, Middle East, and parts of Asia), an insulation material must achieve a Class 1 ranking under Part 7, and a Part 6 propagation index (I) of less than 12, with the sub-index (i1) below 6.
Kingflex insulation products are precision-compounded with halogenated flame retardants and smoke suppressors, enabling closed-cell rubber systems to consistently achieve verified Class 0 performance.
How Dacheng, the green building capital, powers global infrastructure projects with cost-efficient insulation.
Operating 5 state-of-the-art continuous vulcanization and foaming assembly lines. We sustain an annual capacity exceeding 600,000 cubic meters to satisfy high-volume requirements seamlessly.
Our internal laboratory features 8 professional R&D engineers who cross-verify every batch for thermal conductivity, water vapor resistance (μ value), and flame retardancy.
Strategic geographic location in Dacheng, China, with direct access to modern highways leading to Tianjin and Qingdao ports, facilitating efficient ocean shipping globally.
Certified data for engineering specifications, structural HVAC, and plant insulation designs.
| Parameter / Specification | Black Rubber Foam Sheet Roll | Black Rubber Foam Pipe / Tube |
|---|---|---|
| Material Base | Elastomeric Nitrile-Butadiene Rubber & PVC Blend (NBR/PVC) | Elastomeric Nitrile-Butadiene Rubber & PVC Blend (NBR/PVC) |
| Thickness Range | 6mm to 50mm | 9mm to 40mm |
| Inner Diameter (ID) | N/A (Flat sheet/roll) | 6mm to 114mm |
| Apparent Density | 40 to 55 kg/m³ | 40 to 55 kg/m³ |
| Service Temp. Range | -40℃ to +105℃ | -40℃ to +105℃ |
| Water Vapor Permeability | Closed-cell structure >98%, high moisture resistance (μ ≥ 7,000) | Closed-cell structure >98%, low risk of freezing/cracking |
| Reaction to Fire | BS 476 Class 0, Class 1, UL94 V-0, Self-extinguishing | BS 476 Class 0, Class 1, UL94 V-0, Self-extinguishing |
| Core Applications | Duct wraps, large vessels, sound dampening panels | Chilled/hot water pipes, HVAC lines, industrial pipelines |
Kingflex is established by the Jinwei (Kingway) Group, an enterprise with more than 40 years of historical excellence. Founded in 1979, the group was the very first pioneer manufacturer of thermal insulation materials north of the Yangtze River.
Over the past four decades, the company has expanded from a local domestic factory to a major global supplier. By maintaining strict compliance with international testing frameworks like BS 476, ASTM, CE, REACH, and RoHS, Kingflex bridges the gap between high-volume Chinese manufacturing efficiency and strict European fire safety regulations.
High-performance solutions designed for harsh working environments and demanding projects.
Provides thermal barrier wrapping for ventilation and central air conditioning systems. Prevents condensation dripping in high-humidity commercial buildings, hotels, and hospitals.
Specially engineered for low-temperature application systems, such as cold-chain pipelines and liquefied gas lines, maintaining structural elasticity under extreme conditions.
Resists high operating temperatures up to 105℃, helping minimize thermal bridging and ambient heat dissipation in refineries, chemical plants, and production lines.
When global procurement teams select BS 476 fire-rated insulation, price is just one factor. Total Cost of Ownership (TCO) depends on certified compliance, shipping volumes, and material durability.
Pricelist Drivers: Factory quotes fluctuate based on material thicknesses (6mm to 50mm), customized details like self-adhesive backings, glass fiber mesh reinforces, or outer aluminum foil laminates. We supply raw bulk prices and FOB/CIF calculations tailored for global EPC contractors.
EEAT (Experience, Expertise, Authoritativeness, Trustworthiness): Our factory-direct documentation includes traceability reports, batch logs, and certificates from third-party testing institutions. This ensures peace of mind for engineering inspectors requiring Class 0 certifications.
An inside look at our 5 automated production assembly lines and raw material storage.
True authority is backed by real actions and verified customer relationships. We maintain open channels of communication with project engineers and purchasing departments worldwide. From clarifying technical parameters under BS 476, to coordinating customized colors, self-adhesives, or special packaging options, our sales and engineering support teams deliver fast response times.
Our customers appreciate the raw data, test compliance records, and factory site videos we provide, ensuring a transparent ordering experience from our production facility to the job site.
Complete insulation solutions for thermal efficiency, noise reduction, and cryogenic operations.
Answers to common questions from consulting engineers, project contractors, and procurement offices.
Complete directory of our specialized thermal insulation solutions.
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