Kingflex
Kingflex
Explore our high-performance thermal and acoustic isolation products certified for international compliance.
Specifying 3/4" pipe insulation (nominally matching 19mm inner diameter copper and iron systems) is vital for commercial chilled water circuits, variable refrigerant flow (VRF) loops, and hot-water distribution lines. Inadequate insulation leads directly to condensation drips, mold growth, structural compromise, and severe thermal losses.
Kingflex designs its 3/4" elastomeric rubber foam insulation with an optimized blend of Nitrile Butadiene Rubber (NBR) and Polyvinyl Chloride (PVC). This synergistic formulation results in a completely closed-cell microstructure that effectively locks out moisture transmission without requiring supplementary vapor barriers.
Building safety regulations demand rigorous passive fire defense. Kingflex 3/4" pipe insulation options meet BS 476 Part 7 Class 0, UL94 V-0, and ASTM E84 certifications. Under fire conditions, the material produces extremely low smoke density and is self-extinguishing.
Unlike mineral wool or fiberglass—which completely lose their thermal insulation properties when exposed to moisture—Kingflex closed-cell NBR/PVC boasts a water vapor diffusion resistance factor (μ-factor) of ≥ 10,000. Under harsh humid environments (RH > 85%), this micro-cellular structure maintains a stable K-value of 0.034 W/m·K at 0°C, securing energy conservation for over a decade.
Comprehensive physical characteristics of Kingflex Standard & Advanced 3/4" Pipe Insulation Lines
| Property Parameter | Test Standard | Value (Standard NBR/PVC Line) | Value (Cryogenic/Special Line) |
|---|---|---|---|
| Nominal Inner Diameter (ID) | ASTM C534 | 3/4" (Fits ~22mm to 25mm pipes) | Custom cryogenic fits supported |
| Wall Thickness Range | EN 13467 | 9mm, 13mm, 19mm, 25mm, 32mm, 40mm | Multi-layered up to 100mm |
| Thermal Conductivity (λ) | ASTM C177 / C518 | ≤ 0.034 W/(m·K) at 0 °C (32 °F) | ≤ 0.031 W/(m·K) at -150 °C |
| Water Vapor Permeability | ASTM E96 | ≤ 1.94 × 10^-11 g/(Pa·s·m) | Virtually zero permeability (μ ≥ 20,000) |
| Service Temperature Limit | DIN EN 14707 | -40 °C to +105 °C (-40 °F to +221 °F) | -200 °C to +125 °C (-328 °F to +257 °F) |
| Flame Spread & Smoke Index | ASTM E84 / BS 476 | Class 25/50 rated / Class 0 Certified | Self-extinguishing, Halogen-Free options |
| Compression Resilience | ASTM D1056 | ≥ 80% recovery rate | Enhanced structural high-load support |
| Material Formulation | In-house R&D | Elastomeric Rubber-Plastic (NBR/PVC) | Engineered Low-Temperature Elastomer |
Engineered thermal solutions optimized for specific climate zones, mechanical demands, and architectural codes.
In tropical regions and humid summer coastal locations (e.g., Southeast Asia, Gulf Region), chilled water lines (3/4" pipe sizes) are prone to severe condensation. Using our 3/4" NBR/PVC sleeve insulation with a minimum 19mm wall thickness prevents surface condensation under ambient temperatures of 35°C and 85% RH. This eliminates water damage to ceiling tiles and prevents dangerous biological mold growth in office complexes.
Food processing complexes and LNG terminal facilities rely on stable sub-zero pipelines. Kingflex Ultra-Low Temperature solutions insulate down to -200 °C. The 3/4" cryogenic elastomeric foam wraps securely around delicate liquid lines, absorbing thermal contraction forces without cracking, reducing heat gain into the refrigerant, and increasing system energy efficiency.
Hyper-scale data centers use chilled-water server cooling loops. Any liquid droplet from pipe sweating can destroy micro-circuitry. Kingflex 3/4" closed-cell insulation acts as an insurance policy. With its superior moisture protection, it ensures dry operations for data systems, offering acoustic dampening for high-frequency pumps as a secondary benefit.
Jinwei Group & Kingway Group Heritage: Established in 1979 as the first thermal insulation manufacturer north of the Yangtze River, we possess over 40 years of continuous material processing experience.
Our primary manufacturing complex is located in Dacheng, China—widely recognized as the national capital of green building materials. This industrial cluster grants us raw material access, lowering NBR, PVC, and fire-retardant compound costs. We pass these savings directly to our global customers through competitive wholesale pricing.
With 5 fully-automated, continuous extrusion assembly lines, our annual manufacturing capacity exceeds 600,000 cubic meters. This scale ensures Kingflex can fulfill large-scale orders for high-rise infrastructure, marine defense projects, or international distributor networks without delay.
Kingflex modern manufacturing facility in Dacheng, China.
Pioneering Next-Gen Insulation Solutions to Achieve Carbon Neutrality Goals
As green building standards like LEED v4 and BREEAM push for stricter material health reporting, Kingflex is transitioning production lines to halogen-free options. Eliminating bromine and chlorine ensures that in the event of thermal decomposition, the material releases non-corrosive, non-toxic smoke.
Modern commercial buildings demand whisper-quiet operations. Our ongoing R&D focuses on incorporating elastomeric structures with micro-cratered open surfaces on the interior boundary. This configuration dampens turbulent flow noise within 3/4" refrigerant lines, addressing both thermal and acoustic issues in a single application.
Looking ahead, we are testing elastomeric sheets embedded with ultra-thin, moisture-sensing conductive strips. These sensors connect to building management platforms, detecting external cladding leaks or condensation collection before mold can spread behind the pipes.
Every industrial project is backed by our dedicated team of 8 professional R&D engineers, 6 international sales specialists, and a production crew of 230 trained workers. Through Jinwei Group's logistics system, we offer tracking from raw raw polymer compound mixes to finished shipping crates.
We believe in verifiable compliance. Our testing systems run daily product audits checking cell structure density consistency, fire self-extinguishment behavior, and low-temperature durability.
From central heat exchangers in commercial offices to cold insulation systems in heavy industry, our products deliver long-term protection.
Understanding cost structures is critical for purchasing departments and construction estimators. Pricing for 3/4" pipe insulation varies based on the wall thickness selected (e.g., 9mm, 13mm, 19mm, 25mm, or 32mm) and specialized formulation requirements:
Kingflex offers flexible trade options, factory direct container loading, and mixed shipment arrangements. Contact our export sales team for customized bulk pricing sheets.
Get direct factory quotes matching your project's technical specifications.
Contact Factory DirectlyEngineers and estimators address common challenges concerning NBR/PVC closed-cell products.
Direct supply line of professional insulation sheets, boards, and soundproof rolls.
