Engineered to prevent energy loss, condensation, and structural thermal bridging across HVAC and industrial process piping.
An in-depth analysis of high-demand applications, material engineering specifications, and economic drivers.
In global industrial piping systems, 35mm inner diameter (ID) insulation represents a critical specification. Serving as the primary protection layer for 1-1/4 inch nominal pipe size (NPS) steel pipes and 1-3/8 inch outer diameter (OD) copper lines, it is widely utilized across HVAC chilled water loops, domestic hot water distribution systems, and medium-pressure process steam channels.
By establishing a high thermal resistance barrier, 35mm elastomeric pipe insulation limits convective and conductive energy transfers. This is key to meeting strict modern construction energy codes like ASHRAE 90.1, IECC, and European EN 14304 directives.
Operating cold-water pipelines under ambient conditions creates a significant temperature differential. Without specialized 35mm insulation sleeves, moisture in the air condenses on the pipe exterior. This moisture leads to structural damage, mold growth, and localized pipe corrosion under insulation (CUI).
Our closed-cell elastomeric rubber foam features a built-in water vapor barrier ($\mu \ge 10,000$). This structure resists moisture penetration, ensuring the system retains stable thermal conductivity ($\lambda \le 0.034$ W/m·K at 0°C) over an extended service lifetime.
Unmatched scale, advanced raw material compounding, and optimization across Dacheng, the insulation capital of China.
At our advanced facility in Dacheng, China, Kingflex Insulation Co., Ltd. runs 5 automated high-capacity twin-screw extrusion systems. By implementing closed-loop temperature profiles and continuous vulcanization processes, we produce elastomeric foam with a cell structure that is over 98% closed.
This precision ensures uniform wall thickness and a smooth skin surface on all 35mm sleeves. As a result, the insulation offers high tensile strength, easy installation over complex bends, and reliable performance in demanding settings.
Continuous line runs lower unit costs, enabling us to provide highly competitive direct-from-factory quotes to volume distributors and global contractors.
Real-time laser thickness sensors and density checks verify that every batch meets ASTM C534 and European BS 476 Class 0 fire standards.
We supply bespoke lengths, customized slit-and-seal adhesive backings, and color-coded pipelines for clear system identification.
Examine the physical profiles and performance metrics of different industrial insulation solutions.
| Performance Parameter | NBR/PVC Elastomeric Foam (35mm ID) | Rock Wool Section Pipe (35mm ID) | Polyethylene (PE) Foam |
|---|---|---|---|
| Thermal Conductivity ($\lambda$) | $\le 0.034 \text{ W/m·K}$ at 0°C | $\le 0.036 \text{ W/m·K}$ at 25°C | $\le 0.038 \text{ W/m·K}$ at 0°C |
| Vapor Diffusion Resistance ($\mu$) | $\ge 10,000$ (Self-contained barrier) | $\approx 1.0$ (Requires outer vapor jacket) | $\ge 5,000$ |
| Service Temp. Range | -40°C to +105°C | Up to +650°C | -40°C to +90°C |
| Fire Classification | BS 476 Class 0, GB 8624 Class B1 | Class A1 Non-combustible | Class B2 / standard flame retardant |
| Physical Flexibility | Excellent, self-recovering elasticity | Rigid, prone to structural cracking | Semi-rigid |
Part of the Jinwei Group, delivering insulation solutions to industrial, commercial, and defense sectors since 1979.
Established by the Jinwei Group, which holds a rich 40-year history starting in 1979, Kingflex is the pioneer manufacturer of thermal insulation materials located north of the Yangtze River. Focused on energy efficiency and low environmental impact, we combine research, development, volume manufacturing, and international sales under one roof.
Our dedicated team includes 8 professional R&D engineers, 6 international sales consultants, and 230 technicians on our production lines. Working together, we ensure every shipment meets strict quality controls.
We manage active testing labs to evaluate thermal performance under varying humidity levels, verify flame-retardant properties, and test tensile durability. This comprehensive testing program ensures our products deliver stable, long-term performance even in challenging environmental conditions.
Engineered to perform reliably in sub-zero HVAC systems, petrochemical installations, and high-occupancy commercial structures.
Effectively manages surface condensation on chilled water pipes operating at 4°C to 12°C. Additionally, it minimizes thermal loss in heating loops up to 105°C, ensuring efficient operation.
Our open-cell structures absorb medium-to-high frequency mechanical noise, lowering air-conditioning duct resonance and industrial pipe vibration.
Our specialized Dienes Cryogenic system prevents moisture infiltration and structural cracking in ultra-low temperature and liquid nitrogen storage networks.
To ensure smooth compliance for project specifiers, Kingflex maintains a comprehensive set of verified international certifications. These standards confirm that our rubber foam materials meet strict building safety codes, fire resistance criteria, and environmental directives worldwide.
How global distributors, engineering procurement contractors (EPCs), and mechanical installers secure project terms.
When purchasing 35mm pipe insulation in bulk, selecting the correct thickness is critical. We offer walls from 9mm to 40mm thick to handle varying ambient relative humidity levels.
To speed up onsite installation, we supply pre-slit tubes with self-adhesive liners. We also pack our products in tough, UV-stabilized polythene bags to prevent transit wear and simplify logistics.
Standard Material Dimensions:
• Material: NBR/PVC elastomer compound
• Thickness: 6mm - 50mm
• Inner Diameter (ID): 6mm - 114mm (fully covers 35mm requirements)
• Material Density: 40 - 55 kg/m³
• Temperature Capabilities: -40°C to +105°C
We supply complete insulation solutions to over 66 countries. Our support goes beyond manufacturing: we provide technical documentation, installation manuals, and mock-up samples for project validation.
We build long-term relationships through clear communication. Below are typical chat and email logs showing our support for global sourcing requirements:
Detailed technical advice for project engineers, procurement managers, and mechanical estimators.
A look at our manufacturing facilities, continuous extrusion lines, and warehouse operations in Dacheng, China.
Select from our high-performance line of elastomeric foam, rock wool, and soundproofing options.
Kingflex
