Complete Parameters of Elastomeric Foam Insulation Tubes

Implemented National Standard: GB/T 17794-2021 Flexible Foam Rubber and Plastic Thermal Insulation Products Material: Closed-cell foamed composite of NBR (Nitrile Butadiene Rubber) and PVC (Polyvinyl Chloride) Three product types: Bare elastomeric foam tubes, slit self-adhesive elastomeric foam tubes, aluminum foil clad elastomeric foam tubes

1. Standard Dimensions

1.1 Inner Diameter (for copper tubes / PPR pipes / galvanized steel pipes, unit: mm)

6, 9, 13, 16, 19, 22 (4-point pipe), 27 (6-point pipe), 32, 34 (1-inch pipe), 43, 48 (1.5-inch pipe), 57, 60 (2-inch pipe), 76 (2.5-inch pipe), 89 (3-inch pipe), 108, 114, 133, 159, 168, 219 Custom large-caliber sizes available

1.2 Insulation Thickness (commonly used in projects, unit: mm)

9, 13, 15, 20, 25, 30, 35, 40 Common thickness for central air-conditioning chilled water pipes: 15/20/25mm

1.3 Single Length

Integral closed tube: 1.8m, 2.0m (mainstream specifications) Slit self-adhesive tube: 0.95m, 1m, 2m Custom cutting available for extra-large diameters

1.4 Product Classification

1. Closed elastomeric foam tube: Integrally extruded with optimal tightness, preferred for pre-buried new pipelines

2. Slit self-adhesive elastomeric foam tube: Longitudinal slit with pressure-sensitive adhesive, easy construction for old pipeline renovation

3. Aluminum foil clad elastomeric foam tube: Outer aluminum foil lamination for vapor barrier, sun protection, anti-condensation and outdoor weather resistance

2. Thermal Performance (Comparison between Grade B1 and Grade B2)

表格

3. Physical & Mechanical Parameters

• Apparent Density: 45～95 kg/m³ (national standard upper limit ≤95kg/m³)

• Tensile Strength: ≥0.5 MPa

• Elongation at Break: ≥150%

• Compression Resilience (50% compression for 72h): ≥90%

• Low-temperature Bending (-20℃): No cracking or brittle fracture

• Dimensional Stability (105℃, 7 days): Linear shrinkage rate ≤10%

• Water Vapor Permeability Coefficient: ≤2.8×10⁻¹¹ g/(m·s·Pa)

4. Combustion Performance (GB 8624-2012)

Grade B1 (Hardly Flammable, standard for HVAC and fire protection projects)

• Limiting Oxygen Index (LOI): ≥32%

• Smoke Density Rating (SDR): ≤75

• Rapid self-extinguishing after flame removal, no molten drips, low smoke and low toxicity

Grade B2 (Flammable, for ordinary civil anti-freezing insulation)

• Limiting Oxygen Index (LOI): ≥26%

Note: Aluminum foil facing is non-combustible material, which cannot change the inherent fire rating of elastomeric foam body.

5. Additional Parameters of Aluminum Foil Clad Tubes

Aluminum Foil Types

Plain bright aluminum, grid embossed aluminum (mainstream for projects), reinforced mesh aluminum, PET laminated anti-aging aluminum foil

Aluminum Foil Thickness

8～20μm, thermal reflectivity ≥85%

Functions

Block water vapor penetration, eliminate outer wall condensation, UV protection, tear resistance, extend outdoor service life

6. Acoustic Performance

Noise Reduction Coefficient (NRC): 0.45~0.62 The flexible structure can weaken water flow vibration and pipeline resonance noise, widely used for noise reduction in machine rooms.

7. Application Scenarios

Cold insulation for central air-conditioning chilled & cooling water pipes, heat insulation and anti-freezing for PPR hot water pipes, anti-freezing for water supply & drainage pipelines, vibration and noise reduction for machine room pipelines, sun protection & anti-condensation for outdoor pipelines, cold insulation for small industrial low-temperature medium pipelines