Kingflex
Explore our high-performance thermal and acoustic control products manufactured in our state-of-the-art facilities.
Chilled water systems operating between 4°C and 7°C are highly vulnerable to thermal gain and severe surface condensation. Controlling moisture ingress is critical: when ambient humidity contacts cold uninsulated surfaces, water condenses, leading to thermal degradation, corrosion under insulation (CUI), and structural mold. Mitigating these risks requires installing the correct **chilled water pipe insulation sizes** and thicknesses.
By employing high-density, closed-cell elastomeric NBR/PVC structures, engineering teams can guarantee long-term thermal resistance (k-value ≤ 0.034 W/m·K at 0°C) and an integrated water vapor barrier (permeability factor μ ≥ 10,000). Selecting the correct inner diameter (ID) and wall thickness ensures a snug fit, eliminating air gaps that breed micro-condensation.
How modern mega-projects manage thermal transmission with custom-thickness insulation systems.
From the high-ambient humidity zones in Southeast Asia and the Middle East to modern retrofits in Europe and North America, district cooling stations demand thick elastomeric sheet rolls and pre-slit tubes to handle extensive pipe arrays running up to 1000mm in diameter.
Technological sectors require 100% dust-free, non-fibrous thermal barriers. Standard glass wool and rock wool fail to meet the VOC and particle emission requirements in advanced semiconductor fabs. Closed-cell rubber foam insulation keeps chilled loops condensation-free without risking contamination.
Handling liquefied natural gas (LNG), industrial cold fluids, or ethylene requires specialized multilayer NBR/PVC-based systems. These maintain elasticity at temperatures down to -200°C, ensuring structural integrity and preventing catastrophic pipe cracking.
An exact guide to matching Nominal Pipe Size (NPS) with elastomeric inner diameters and wall thicknesses.
| Nominal Pipe Size (NPS) | Copper Pipe OD (Inches/mm) | Iron/Steel Pipe OD (Inches/mm) | Recommended ID (Insulation) | Standard Wall Thickness Options |
|---|---|---|---|---|
| 1/4" | 3/8" (9.5mm) | 0.540" (13.7mm) | 10mm / 14mm | 6mm, 9mm, 13mm, 19mm, 25mm, 32mm, 40mm, 50mm |
| 1/2" | 5/8" (15.9mm) | 0.840" (21.3mm) | 16mm / 22mm | 9mm, 13mm, 19mm, 25mm, 32mm, 40mm, 50mm |
| 3/4" | 7/8" (22.2mm) | 1.050" (26.7mm) | 22mm / 28mm | 9mm, 13mm, 19mm, 25mm, 32mm, 40mm, 50mm |
| 1" | 1-1/8" (28.6mm) | 1.315" (33.4mm) | 30mm / 35mm | 13mm, 19mm, 25mm, 32mm, 40mm, 50mm |
| 1-1/2" | 1-5/8" (41.3mm) | 1.900" (48.3mm) | 42mm / 48mm | 13mm, 19mm, 25mm, 32mm, 40mm, 50mm |
| 2" | 2-1/8" (54.0mm) | 2.375" (60.3mm) | 54mm / 60mm | 19mm, 25mm, 32mm, 40mm, 50mm |
| 3" | 3-1/8" (79.4mm) | 3.500" (88.9mm) | 89mm / 92mm | 19mm, 25mm, 32mm, 40mm, 50mm |
| 4" | 4-1/8" (104.8mm) | 4.500" (114.3mm) | 108mm / 114mm | 25mm, 32mm, 40mm, 50mm |
*Custom diameters exceeding 114mm are supplied as elastomeric sheet rolls, pre-cut to fit large-scale chillers and headers.
As a leading hub for insulation manufacturing, China offers significant supply chain integration. Our production base in Dacheng, the capital of energy-efficient green building materials, provides direct access to high-grade polymers, processing chemicals, and shipping ports.
Through scale and automation, Kingflex maintains competitive lead times and high quality. With 5 automated continuous-extrusion assembly lines, we produce over 600,000 cubic meters of high-density closed-cell elastomeric foam annually. Our integrated quality system ensures each batch complies with fire protection standards like BS 476, Class 0, and ASTM E84.
Years of Heritage
m³ Annual Production Capacity
Countries Served Globally
Dedicated Factory Professionals
A global leader in modern thermal, cold, and acoustic insulation solutions.
Kingflex Insulation Co., Ltd. is a professional manufacturing and trading combo for thermal insulation products. Kingflex research, development, and production department is located in the capital of green-building materials in Dacheng, China. It is an energy-saving, environmentally friendly enterprise concentrating on research, development, production, and sales.
In operation, Kingflex takes energy saving and consumption reduction as its core concept. We provide insulation solutions by means of consulting, research and development, production, installation guidance, and post-sale service to lead the development of the global building materials industry.
Kingflex was established by the Jinwei Group, which has a history of more than 40 years. Established in 1979, Jinwei Group was the first manufacturer of thermal insulation materials north of the Yangtze River.
Our employees are highly skilled, contributing to a collaborative and productive work environment. The Kingflex team is a close-knit group focused on delivering consistent, high-quality service. Kingflex has 8 professional engineers in the R&D Department, 6 professional international sales specialists, and 230 workers in the production department.
Continuous investment in material science ensures compliance with strict international codes.
Certified performance verified by international testing bodies.
Verified communication and projects from our overseas partners.
Our solutions installed across major infrastructural cooling networks.
Technical guidance on physical properties, sizing, calculation, and installation practices.
A1: It is primarily used for HVAC/R ducts, commercial air conditioning pipes, building thermal insulation, and industrial piping to control cold loss and prevent sound and vibration transmission.
A2: Yes, it is formulated with flame retardants. Our products meet BS 476 Part 6 & 7 (Class 0 / Class 1), UL94, and ASTM E84 requirements, ensuring compliance with local construction codes.
A3: Rubber foam is a flexible, closed-cell material that prevents moisture absorption, making it suitable for cold systems. Rock wool has an open-fibrous structure best suited for high-temperature applications and fire protection barriers.
A4: Yes, we offer OEM services to support custom inner diameters, wall thicknesses, self-adhesive backings, and aluminum foil jackets.
A5: Our products are certified under BS 476, CE, REACH, RoHS, UL94, and ASTM international standards to ensure consistent quality.
A6: Yes, each batch is coded during production. This allows for traceability from raw materials to final shipment.
A7: We manufacture insulation sheets in thicknesses ranging from 6mm to 50mm, providing solutions for standard to extreme environmental conditions.
A8: In standard indoor applications with correct installation, the material has a service life of 10 to 15 years.
A9: Condensation prevention depends on the chilled water operating temperature, relative humidity, and ambient temperature. Our engineering department can calculate target thicknesses using ASTM C680 formulas.
Browse our specialized products for low-temperature applications, industrial piping, and sound isolation.
