K‑Flex ST Tube 50mm × 42mm × 2m | Elastomeric Nitrile Rubber Insulation

K-FLEX® ST Tube is a high-performance elastomeric nitrile rubber insulation designed for all civil and industrial refrigeration, air conditioning, plumbing, and HVAC applications. It provides excellent thermal efficiency, condensation control, and long-term durability.

Key Benefits

• Wide temperature range – Performs from -165°C to +110°C for tubes
• Prevents condensation – Protects pipes and improves energy saving
• Fire safety – Euroclass BL-s2, d0 fire rating
• Very fine closed cellular structure – High technical performance with permeability μ ≥ 10,000
• Hygienic – Resistant to mould, fungi and bacteria
• Easy installation – Light and flexible material for quick fitting
• pH neutral – Prevents corrosion
• Environmentally friendly – Without CFCs and HCFCs

Technical Specifications

• Insulation thickness: 50 mm
• Bore diameter: 42 mm
• Length: 2 metres
• Material: Elastomeric nitrile rubber (Flexible Elastomeric Foam)
• Thermal conductivity: λ0°C ≤ 0.033 W/(m·K), λ40°C ≤ 0.037 W/(m·K)
• Service temperature range: -40°C to +85°C (ST/SK version)
• Fire rating: Euroclass BL-s2, d0
• Water vapour diffusion resistance: μ ≥ 10,000
• Water permeability: WS01
• pH: Neutral (7), Cl⁻ <300ppm
• Dimensional stability: Excellent – thermal conductivity does not change with time

Applications

Thermal insulation for building equipment and industrial installations, including refrigeration systems, air conditioning, plumbing, water pipes, tanks, fittings, and all civil and industrial applications requiring condensation control and energy efficiency.

Standards & Compliance

Harmonised standard: EN 14304:2009+A1:2013
Declaration of Performance: No. 01010207201-000W-CPR-18
Product code: 01010207201-000W
Manufacturer: L'Isolante K-Flex S.p.A., Via Don Locatelli 35, 20877 Roncello (MB), Italy
Notified bodies: Certification body No. 0751, Testing laboratory No. 0497
CE compliant: In accordance with Regulation (EU) No 305/2011

Certifications & Approvals

Environmental Product Declarations (EPD), ECO-BAU, MINERGIE-ECO, CE-MARINE (Bureau Veritas), ABS, DNV, Lloyd's Register, UL94, FM Approval.