Kingflex delivers premium rubber foam thermal insulation products engineered for HVAC, industrial pipelines, buildings, and cold-chain systems — trusted by engineers across 88+ countries for over 45 years.
Kingflex is established by Jinwei Group, which has more than 45 years of history. Kingway Group was established in 1979 — it was the first manufacturer of thermal insulation materials north of the Yangtze River, setting the standard for the entire industry in China and beyond.
Over four decades, Kingflex has grown from a pioneering domestic manufacturer into a globally recognized brand, designated by China's Ministry of Energy, Ministry of Electric Power, and Ministry of Chemical Industry as an official production enterprise.
First thermal insulation manufacturer north of the Yangtze River, pioneering China's insulation industry.
Built a dedicated R&D department with 8 professional engineers, continuously advancing product formulations and performance.
Over the past 16+ years, Kingflex products have been exported to more than 88 countries worldwide, earning international certifications.
Our employees are amazing in their own right, but together they are what makes Kingflex such a fun and rewarding place to work. Kingflex team is a tight-knit, talented group with a shared vision of giving consistently first-class service for our clients.
Kingflex has eight professional engineers in the R&D Department, 6 professional international sales specialists, and 230 skilled workers in the production department — all united by a commitment to quality and innovation.
At present, Kingflex has 5 large automatic assembly lines, with an annual production capacity of more than 600,000 cubic meters, and has become a designated production enterprise designated by the Ministry of Energy, the Ministry of Electric Power and the Ministry of Chemical Industry.
5 large automatic assembly lines delivering 600,000+ m³ annually. Designated by China's Ministry of Energy, Ministry of Electric Power, and Ministry of Chemical Industry as an official production enterprise.
Kingflex thermal insulation products are widely used in construction, petroleum, chemical, national defense, aerospace and other industries. Exported to more than 88 countries worldwide over the past 16+ years.
Supply customers all over the world with a full set of energy-saving insulation system solutions. We are an integrated solution provider of thermal insulation, cold insulation, and noise reduction for buildings and industries.
Kingflex has earned official designation from China's Ministry of Energy, Ministry of Electric Power, and Ministry of Chemical Industry — a testament to our consistent quality, scale, and reliability as a strategic supplier for critical national infrastructure projects. Our products meet the strictest performance benchmarks for thermal resistance, fire retardancy, moisture resistance, and long-term durability.
With 8 dedicated R&D engineers and state-of-the-art testing laboratories, Kingflex continuously advances the science of elastomeric foam insulation — developing products that exceed international standards and address the evolving demands of global markets.
Foams evenly and fully with closed cell rate exceeding 98%, delivering excellent long-term thermal insulation performance.
Full closed-cell structure with low moisture absorption ensures stable thermal conductivity throughout the product lifecycle.
All Kingflex products meet BS 476, UL94, CE and ASTM fire safety standards, self-extinguishing upon removal of flame.
Outstanding mechanical resilience ensures products maintain shape and insulation properties under sustained compression loads.
Our products have passed BS 476, CE, REACH, RoHS, UL94, ASTM and other international certifications — ensuring full compliance with global safety, environmental, and performance standards for every market we serve.
From elastomeric rubber foam tubes and sheets to rock wool boards and blankets — Kingflex offers a comprehensive range of insulation solutions engineered for every application, climate, and performance requirement.
Closed-cell NBR/PVC foam tube for HVAC and industrial pipelines
Engineered for chemical and petrochemical pipeline protection
High resilience foam pipe for flexible building HVAC installations
Standard black foam pipe for air conditioning and refrigeration
Versatile foam tube for thermal and cold insulation requirements
Purpose-designed for central air conditioning duct insulation
Complete insulation system solution for underground applications
Engineered for extreme low-temperature cryogenic environments
Optimized for low temperature and high humidity pipeline systems
Industrial-grade cryogenic insulation for process pipelines
High-temperature resistant board for industrial and building use
Flexible blanket insulation for industrial pipelines and equipment
Every Kingflex product is engineered to exacting standards, with full traceability, consistent quality, and OEM customization available to meet your project's specific requirements.
Material: NBR/PVC
Thickness: 6mm–50mm
Density: 40–55 kg/m³
Service Temperature Range: -40°C to 105°C
1. Foams evenly and fully; closed cell rate over 98%, excellent thermal insulation.
2. Full closed-cell structure, low moisture absorption, stable long-term thermal conductivity.
3. Compression resilience over 80%.
4. Flame retardant, self-extinguishing off fire.
5. Low thermal conductivity, high moisture resistance factor.
Central air conditioning duct insulation · Building wall, roof and basement thermal & sound insulation · HVAC & water supply anti-condensation · Industrial equipment and steam pipe insulation · Hotels, malls & hospitals · Rail transit & cold storage · Chemical industry pipe insulation
Material: NBR/PVC
Thickness: 9mm–40mm
Inner Diameter (ID): 6mm–114mm
Density: 40–55 kg/m³
Service Temperature Range: -40°C to 105°C
1. Foams evenly and fully; closed cell rate over 98%.
2. Professional pipe spraying equipment ensures even coating.
3. Compression resilience over 80%.
4. Flame retardant, self-extinguishing off fire.
5. Low thermal conductivity, high moisture resistance factor.
6. Greatly reduces pipe freezing and cracking risks.
Central AC chilled/hot water & condensate pipes · Building HVAC & water supply antifreeze · Hotels, malls & hospitals ventilation · Industrial steam & process pipe insulation · Cold storage & cold chain pipelines · Chemical & petrochemical pipe protection · Solar & hot water system pipelines
Kingflex thermal insulation products serve a diverse range of industries worldwide — from commercial HVAC systems and industrial pipelines to aerospace, cold chain logistics, and sustainable building construction.
Heat insulation for air ducts, chilled/hot water pipes, and condensate pipelines in central air conditioning systems for commercial and residential buildings.
Wall, roof, and basement thermal and sound insulation. Anti-condensation and anti-freezing solutions for building water supply and drainage systems.
Insulation for equipment, steam pipes, storage tanks, and process pipelines. Heat insulation, sound insulation, and corrosion protection for chemical industry.
Thermal and cold insulation for petroleum refining and petrochemical processing pipelines, meeting the highest standards for safety and performance.
Insulation and noise reduction for ventilation ducts and machine rooms in high-occupancy commercial and healthcare facilities.
Thermal insulation for railway carriages and cold rooms. Cold chain pipeline insulation to maintain temperature integrity across the supply chain.
Kingflex insulation materials meet the stringent requirements of aerospace and national defense applications, where performance and reliability are paramount.
Thermal insulation for solar hot water system pipelines and renewable energy infrastructure, maximizing energy efficiency and reducing heat loss.
Kingflex products have been successfully installed in landmark projects across Asia, the Middle East, Europe, and beyond — from major commercial developments and industrial facilities to critical infrastructure and cold-chain logistics networks.
Kingflex maintains a robust global supply chain with direct export capabilities to 88+ countries. Our international sales team and logistics network ensure timely delivery, responsive technical support, and seamless OEM service for clients worldwide.
Active export presence across Asia-Pacific, Middle East, Europe, Africa, and the Americas with established distribution channels.
Experienced export team handling international shipping, customs documentation, and on-time delivery for projects of all scales.
Full OEM service available. Custom dimensions, specifications, and branding to meet the unique requirements of each project and market.
6 professional international sales specialists provide responsive pre-sales consultation, technical guidance, and after-sales support in multiple languages.
Real conversations with real clients — our customers from across the globe consistently praise Kingflex for product quality, competitive pricing, reliable delivery, and responsive after-sales service. Here are some authentic customer testimonials.
Kingflex insulation products are specified and used by leading contractors, engineering firms, and industrial operators across 88+ countries.
Everything you need to know about Kingflex elastomeric rubber foam insulation products — from applications and fire safety to customization and certifications.
It is mainly used for HVAC ducts, air conditioning pipes, building thermal insulation, industrial pipeline cold insulation, and sound insulation across commercial, industrial, and residential applications.
Yes, our rubber foam insulation is flame retardant and self-extinguishing, meeting the safety standards of BS 476, UL94, CE, and ASTM for building and industrial projects globally.
Rubber foam is flexible, closed-cell, and moisture-proof — ideal for HVAC and building insulation. Rock wool is high-temperature resistant and fireproof, making it better suited for industrial high-temperature pipeline insulation.
Yes, Kingflex supports full OEM service to meet different project requirements. Custom dimensions, specifications, densities, and private-label branding are all available upon request.
Our products have passed BS 476, CE, REACH, RoHS, UL94, ASTM, and other international certifications, ensuring product quality and full compliance with global safety and environmental standards.
Yes, all Kingflex products have full traceability from raw material sourcing through production and quality control to final delivery — ensuring accountability at every stage of the supply chain.
Kingflex can produce rubber foam insulation sheet rolls from 6mm to 50mm thickness, accommodating a wide range of application requirements from light building insulation to heavy industrial use.
With proper installation and maintenance, Kingflex rubber foam insulation pipe and board products have an expected service life of approximately 10 to 15 years under normal operating conditions.
Choosing Hvac Pipe Insulation in 2026 requires more than comparing thickness and price. It demands practical judgment. Pipe temperature, humidity,
Author: Charlotte Date: 2026-10-16
Learn More
Choosing a China-based 15mm Insulation Pipe supplier requires more than comparing online prices. Global buyers need consistent dimensions, dependable
Author: Sophia Date: 2026-10-11
Learn More
Choosing the right Warehouse Insulation can shape energy costs, product quality, and worker comfort for decades. Global buyers face different
Author: Mason Date: 2026-10-01
Learn More
Kingflex
