Engineered rubber foam tubes, sheets, and adhesives designed to control structure-borne vibration, decouple drainage pathways, and prevent thermal transfer.
Kingflex Insulation Co., Ltd. is a professional manufacturing and trading combo for thermal insulation products. Our research, development, and production departments are located in Dacheng, China—the capital of green-building materials. As an energy-saving, environmentally friendly enterprise, we concentrate on R&D, high-end automated production, global sales, and comprehensive consulting services.
Established by the Jinwei Group, which boasts more than 40 years of industrial history, our roots date back to 1979. Jinwei Group was the pioneer manufacturer of thermal and acoustic insulation materials north of the Yangtze River. We build on four decades of structural experience, adapting our processes to match the strict engineering criteria of today's green building codes.
Our operation employs 8 dedicated professional engineers in our R&D Department, 6 certified international sales consultants, and 230 highly trained industrial workers. We have achieved unified global standards by combining mechanical precision, high molecular chemistry, and customized elastomeric solutions.
In high-density urban developments, high-rise residential properties, medical centers, and prestige hotels, the sound generated by internal gravity drainage networks represents a leading source of occupant discomfort. Traditional plastic drainage pipes, such as standard PVC or thin-walled polypropylene (PP), lack the acoustic mass and damping capabilities required to suppress the dynamic turbulence of wastewater flowing downwards. As a result, the market has pivoted toward Low Noise Drainage Pipes combined with high-performance elastomeric insulation sleeves and decoupling wraps.
Acoustic performance in building drainage systems is governed by strict global guidelines, including the European standard EN 14366 (which measures laboratory noise levels of wastewater installations) and the German standard DIN 4109 (which sets maximum permissible noise levels in living spaces). To achieve compliance, modern architectural specifications mandate structural decoupling and the use of heavy-weight elastomeric cladding around pipes.
"The sound level of an uninsulated PVC drainage line can exceed 35 dB(A) under peak drainage flow, whereas wrapping the pipe with a 9mm to 25mm closed-cell NBR/PVC elastomeric rubber shield reduces structural transmission below the 20 dB(A) threshold mandated for luxury dwellings."
To address drainage pipe noise effectively, engineers must mitigate two distinct pathways of sound transmission:
| Parameter | NBR/PVC Closed-Cell Rubber Foam | Traditional Polyethylene (PE) | Rock Wool wrap / Mineral Wool |
|---|---|---|---|
| Density Range | 40–55 kg/m³ | 25–35 kg/m³ | 80–120 kg/m³ |
| Thermal Conductivity (λ) | ≤ 0.035 W/(m·K) at 0°C | ≤ 0.040 W/(m·K) at 0°C | ≤ 0.044 W/(m·K) at 0°C |
| Acoustic Insertion Loss (dB) | High (18 to 28 dB reduction) | Low (5 to 12 dB reduction) | Moderate to High (Requires heavy vinyl barrier) |
| Moisture Resistance (μ-value) | ≥ 10,000 (Closed-cell prevents condensation) | ≥ 3,000 | 0 (Requires vapor barrier wrap) |
| Fire Safety Rating | Class 0 / Class 1 (BS 476, UL94 V-0) | Class B2 (Highly combustible) | Class A1 (Non-combustible) |
As globally integrated supply networks face structural disruptions, sourcing directly from high-capacity, automated manufacturing plants in China offers a combination of reliable supply chain resilience, cost efficiency, and consistent material quality. At Kingflex Insulation, our Factory 4.0 infrastructure utilizes smart processing to deliver premium-grade acoustic products worldwide.
Our facility operates 5 large automatic assembly lines, generating an annual output exceeding 600,000 cubic meters of elastomeric rubber foam insulation. We are recognized as an authorized, designated production enterprise by the Ministry of Energy, the Ministry of Electric Power, and the Ministry of Chemical Industry in China. This scale enables us to fulfill massive industrial orders with minimal lead times, ensuring construction schedules remain unaffected.
Quality assurance is embedded in every step of the extrusion, foaming, and curing process. Each batch of Kingflex NBR/PVC elastomeric rubber tube and sheet insulation is barcoded at the mixing station. This allows us to track raw material inputs, heat levels, foaming agent concentrations, and oven speeds. Our products carry international certificates such as BS 476, CE, REACH, ROHS, UL94, and ASTM, ensuring full compliance with import standards in Europe, North America, the Middle East, and Southeast Asia.
How diverse regions and architectural specifications use elastomeric insulation systems to address noise pollution and thermal dynamics.
In modern high-rises, vertical soil stacks run directly adjacent to bedrooms and living spaces. Architects specify closed-cell insulation sleeves around internal PP-MD or PVC drainage pipes. This provides thermal protection to prevent condensation while dampening the sound of rushing water, ensuring quiet, high-value living environments.
Hospitals and clinics require precise acoustic controls to aid patient recovery. Drainage pipes in surgical suites and intensive care units are isolated with Kingflex elastomeric systems. These systems prevent mold and mildew growth (conforming to hygiene codes) while blocking fluid turbulence sounds.
Industrial settings require dual-action pipe cladding. In chemical and petrochemical processing facilities, Kingflex elastomeric materials isolate the steel or plastic conduit from temperature fluctuations. This reduces mechanical resonance, manages acoustic output, and shields lines from chemical corrosion.
Our manufacturing capacity is optimized to align with international metrics. We provide products in two main structural forms to cover all plumbing, HVAC, and industrial drainage project designs.
Kingflex Standard Dimensions:
Kingflex Standard Dimensions:
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Everything you need to know about purchasing, specifying, and installing our noise reduction and thermal insulation products.
It is primarily used for HVAC ducts, air conditioning lines, structural thermal insulation, noise isolation of building drainage pipes, and cold conservation in industrial process piping. Its flexible, closed-cell structure makes it ideal for preventing condensation and dampening low-frequency sound energy.
Yes, our materials incorporate advanced flame retardants to achieve self-extinguishing behavior. Our products satisfy international fire safety codes, including the BS 476 standard, Class 0 / Class 1 performance certificates, and the UL94 V-0 flammability classification.
Rubber foam features a flexible, closed-cell matrix with high resistance to water vapor transmission, making it suitable for cold systems, condensation prevention, and low-frequency noise isolation. Rock wool is a fibrous mineral-based material that withstands high temperatures and has an A1 non-combustible fire rating, making it suitable for industrial high-temperature pipelines and exhaust runs.
Yes, we offer comprehensive OEM and ODM solutions. We manufacture custom thicknesses (from 6mm to 50mm), custom internal diameters, color codings, self-adhesive backings, and pre-cut acoustic panels to streamline field assembly.
Our product portfolio meets global regulatory compliance and safety standards, holding approvals such as BS 476, CE, REACH, ROHS, UL94, and ASTM. These certifications verify low toxicity, low smoke development, flame containment, and durability.
Yes. Every production run is barcoded, recording the raw materials, machinery parameters, shift details, and testing logs. This allows us to track manufacturing history and resolve quality concerns efficiently.
We manufacture rubber foam sheets in thicknesses ranging from 6mm to 50mm, allowing engineers to match the specified thermal efficiency and sound insertion loss requirements of their projects.
When installed correctly in indoor plumbing, HVAC, or drainage environments, our NBR/PVC elastomeric materials have an operational lifespan of 10 to 15 years, maintaining consistent thermal and acoustic properties.
From ultra-low temperature cryogenic line protection to vibrant color-coded HVAC installations and high-density acoustic wraps.
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