Features: Low thermal conductivity (approximately 0.022-0.033 W/m·K), excellent insulation performance, available in integrally cast or prefabricated shell and pipe forms.
Applications: Outdoor buried gas pipelines and central heating pipelines, commonly found in “direct-buried insulated pipes.”
Advantages: High strength, corrosion protection, and excellent moisture resistance.
Mostly used for underground gas pipelines, the outer sheath provides waterproofing and corrosion resistance.
Features: Flexible, moisture-resistant, and easy to install.
Applications: Generally used for indoor low-pressure gas pipelines (typically where temperature differences are minimal and only condensation protection is required).
Features: High-temperature resistance (above 600°C) and excellent fire resistance.
Applicable to: Areas requiring fireproofing and heat insulation, or gas pipelines near high-temperature sections such as boilers and heating furnaces.
A protective layer of aluminum foil or iron sheet is required to prevent water absorption and failure.
Features: High strength, pressure resistance, and temperature resistance of 650-1000°C.
Applicable to: High-temperature gas pipelines (such as gas pipelines near industrial furnaces), or where pressure resistance and fire protection are required.
Features: Ultra-low thermal conductivity (approximately 0.015 W/m·K), high-temperature resistance, and thin thickness.
Applicable to: Gas pipelines in limited space or with extremely high energy efficiency requirements.
City gas pipelines (normal temperature, medium and low pressure): Generally do not require complex insulation. For cold regions or for frost protection, polyurethane direct-buried insulation pipe or rubber-plastic materials are often used.
For industrial high-temperature gas pipelines: Rock wool, calcium silicate, or aerogel are recommended, offering both fire resistance and thermal insulation.
Buried gas pipeline: polyurethane foam + polyethylene outer sheath is the most common combination.
KERUI Refractory supplies different insulation materials for gas pipelines. If you have any needs or questions, please contact us and our technical engineers will serve you in a timely manner!