Engineered thermal systems and flexible sound absorption solutions manufactured under rigorous EN 13501 and ASTM inspection protocols.
Flexible elastomeric foam (FEF), specifically compounded from Nitrile Butadiene Rubber (NBR) and Polyvinyl Chloride (PVC), represents the pinnacle of modern mechanical insulation. The secret to its structural integrity lies in the high density of closed micro-cells (exceeding 98% closed-cell rate). Each micro-cell encapsulates static air, creating a powerful barrier against thermal transfer.
Unlike fibrous materials like fiberglass or rock wool, NBR/PVC rubber foam possesses an inherent water vapor retarder. The water vapor transmission rate (measured as the µ-factor) is exceptionally high. This prevents the common industry issue of "thermal degradation via moisture absorption"—a structural flaw where moisture penetrates insulation, raising thermal conductivity and causing premature degradation or Corrosion Under Insulation (CUI).
Our specialized manufacturing processes ensure that the thermal conductivity (λ) remains constant, typically ranging between 0.032 to 0.035 W/(m·K) at 0°C. Combined with high flexibility, this material is highly effective for complex HVAC geometries, chillers, and industrial piping networks.
Kingflex Insulation Co., Ltd. is a globally integrated manufacturing and trading powerhouse specializing in high-performance thermal insulation systems. Our central production facilities are located in Dacheng, China—historically recognized as the capital of green-building materials.
Established by the Jinwei Group (previously known as Kingway Group, founded in 1979), our heritage spans over 40 years of material innovation. As the very first manufacturer of thermal insulation materials north of the Yangtze River, we have spearheaded critical industry standards in energy-saving technology.
Our company core value is built on energy conservation. We deliver holistic mechanical insulation solutions, covering initial design consultation, custom R&D, structural simulation, installation guidance, and lifetime post-sale support.
State-of-the-art automation ensures uniform physical properties across every batch of elastomeric sheeting and tubing.
At present, Kingflex operates 5 large-scale automated continuous vulcanization assembly lines. This advanced configuration ensures thickness consistency and homogenous cellular structures. Because of this efficiency, we are recognized as a designated supplier by the Ministry of Energy, the Ministry of Electric Power, and the Ministry of Chemical Industry.
Our products serve deep engineering markets including civil construction HVAC, chemical piping, oil and gas terminals, defense installations, cleanrooms, and aerospace test systems. Over the past 16 years of active export growth, our international team has shipped materials to critical hubs in North America, Europe, Southeast Asia, and the Middle East.
Technical parameters tested according to DIN, ASTM, and GB protocols to verify structural performance.
| Performance Characteristic | NBR/PVC Sheeting Specifications | NBR/PVC Tubing/Pipe Specifications | Test Methods & Compliance |
|---|---|---|---|
| Thickness Range | 6mm, 9mm, 13mm, 19mm, 25mm, 32mm, 40mm, 50mm | 9mm, 13mm, 19mm, 25mm, 32mm, 40mm | EN 822 / ASTM C209 |
| Inside Diameter (ID) | N/A (Roll Form / Flat Sheet) | 6mm up to 114mm (Nominal pipe sizes) | EN 824 |
| Apparent Density | 40 - 55 kg/m³ | 40 - 55 kg/m³ | ASTM D1622 / EN 1602 |
| Thermal Conductivity (λ) | ≤ 0.035 W/(m·K) at 0 °C | ≤ 0.035 W/(m·K) at 0 °C | ASTM C518 / ISO 8301 |
| Operating Temperatures | -40 °C to +105 °C | -40 °C to +105 °C | ASTM C411 |
| Water Vapor Resistance (µ) | ≥ 7,000 (Class 1) / ≥ 10,000 (Class 0) | ≥ 7,000 (Class 1) / ≥ 10,000 | EN 12086 / ASTM E96 |
| Fire Classification | Class 0 & Class 1 / B-s3, d0 | Class 0 & Class 1 / B-s3, d0 | BS 476 Part 6/7, EN 13501-1 |
| Compression Resilience | Over 80% recovery rate | Over 80% recovery rate | ASTM D1056 |
Why leading global EPC buyers choose Dacheng-based manufacturing clusters for large-scale energy projects.
China's green building material industry cluster, centered in Dacheng, offers a robust framework for large-scale mechanical insulation projects. This localized production hub provides key advantages for international procurement:
Additionally, Kingflex maintains a strict Quality Control program. The factory features fully equipped test stations that measure density, thermal drift, smoke toxicity, and dimensions for every batch before shipping.
High-performance variations including cryogenics, corrosion resistant skins, and rock wool options.
High-flexibility NBR-based pipe cover designed for standard residential HVAC applications.
Protected outer layer designed to resist environmental wear and prevent corrosion under insulation.
High-stretch NBR formula for quick installation around pipe bends and fittings.
Standard commercial grade NBR/PVC pipe insulation with built-in moisture protection.
Lightweight option optimized for acoustic absorption and high vibration damping.
Industrial-grade pipe wrap optimized for high-temperature and solar HVAC lines.
Heavy-duty elastomeric solution designed for direct-burial municipal pipelines.
Specially engineered for sub-zero LNG handling systems down to -196°C.
High-density sheeting designed for ammonia refrigeration loops and cold storage.
Multi-layer system designed to prevent thermal shock in industrial environments.
Rigid rock mineral fibers with high-density ratings for advanced fire safety.
High-temperature insulation wrap designed for industrial furnaces and boiler systems.
How our elastomeric products are integrated into large-scale commercial and industrial HVAC designs.
In modern commercial complexes, airports, and hotels, condensation on air ducts poses a constant threat. Closed-cell NBR/PVC sheets are directly applied to external duct surfaces. This isolates cold metal from humid air, preventing dew point formation and water damage.
Acoustic open-cell and semi-open cell variants, like the 6mm and 10mm sound insulation sheets, are designed to absorb high-frequency noise from compressors and blowers. Using these materials inside HVAC machine rooms and plant walls significantly reduces ambient noise levels, satisfying municipal acoustic standards.
In chemical factories and refineries, high-density NBR/PVC piping with Class 0 fire ratings protects outdoor lines from environmental exposure. The material retains its insulating performance even under freeze-thaw cycles.
Every step of our process—from raw material blending to dispatch—is fully traceable.
For global engineering firms, traceability is essential. Kingflex maintains a clear record system that links each batch of shipped insulation to its specific production line, raw material feed lot, test data, and shift operators.
This tracking ensures consistent material performance and simplifies documentation during audits by third-party certifiers like UL, FM, and SGS. By standardizing this data workflow, we help partners speed up project sign-offs and ensure long-term system reliability.
A visual walk-through of the Kingflex manufacturing floor, storage depots, and laboratory sectors.
Technical configurations and dimensions for our main product lines.
Designed for wide-diameter vessels, large air ducts, and flat surfaces, our sheeting roll provides consistent thermal and moisture protection.
Key Performance Properties: Evaporative cell structures provide a high closed-cell rate (>98%), low thermal conductivity, and good elasticity under compression (>80%). The material is also flame-retardant and self-extinguishing.
Pre-formed tubing designed for fast slide-on installation over copper, steel, or plastic pipes in HVAC and industrial systems.
Key Performance Properties: Our automated pipe extrusion line ensures consistent wall thickness. It offers good compression resistance, low thermal conductivity, and helps protect pipelines from freezing, cracking, and sweating.
Insights from our engineering and R&D divisions regarding material behavior, installation, and compliance.
Custom thicknesses and acoustic solutions designed to meet specific engineering criteria.
Kingflex
