Prefabricated steel jacket steam insulation steel pipe common insulation material types and characteristics | Hebei Yuanfeng

In modern industry and urban infrastructure construction, steel jacket steam insulation pipes are widely used in the field of steam transportation due to their excellent performance. The choice of insulation material plays a key role in the insulation effect of the pipeline, service life, and overall system performance.

Common insulation materials for prefabricated steel jacket steam insulation pipes include glass wool, aluminium silicate needle-punched blanket, calcium silicate tiles, polyurethane, and nano aerogel.

Glass wool has good formability, relatively low bulk density, and low thermal conductivity, meeting the requirements for insulation, safety, and stability in high-temperature environments. The operating temperature of steam pipelines is usually between 150℃ and 350℃, and glass wool can be used for a long time at -120℃ to 400℃, not easily softening or deforming at high temperatures, continuously blocking heat loss. In steel jacket steam insulation pipes, it is often used as an important insulation layer material, effectively reducing heat loss and adapting to more complex environmental conditions.

Aluminium silicate insulation material has outstanding high-temperature resistance and can withstand higher temperatures, making it suitable for high-temperature steam pipelines. It can maintain stable insulation performance in high-temperature environments, effectively reducing heat transfer to the outside. It is often used in conjunction with other insulation materials to construct a composite insulation structure, enhancing the overall insulation effect. For example, in steam pipeline sections with higher temperatures, using an aluminium silicate needle-punched blanket as the main insulation material, combined with other auxiliary materials, can meet the insulation needs of high-temperature steam.

Polyurethane is mostly used for making cold storage, refrigerated vehicles, or fresh-keeping boxes, and can also be used as an insulation layer for colour steel sandwich panels and petrochemical tank insulation materials, with good insulation and cooling performance. In steel jacket steam insulation pipes, polyurethane rigid foam is generally used as an organic insulation layer, suitable for temperatures ≤140℃, and needs to be used in conjunction with inorganic insulation materials. It can effectively ensure the medium temperature, keeping the outer protective pipe surface at normal temperature.

Microporous calcium silicate is an inorganic thermal insulation material resistant to high temperatures. Its normal temperature thermal conductivity is ≤0.055w (m.k), density ≤220kg/m³, and other indicators such as moisture content, temperature resistance, and compressive strength can meet relevant requirements. In steel jacket steam insulation pipes, as an inorganic hard insulation layer, it can withstand high temperatures, ensure the interface temperature between the organic insulation layer, prevent polyurethane foam from carbonisation, and provide a guarantee for the stable operation of the pipeline in high-temperature environments.

Nano aerogel, as a new high-efficiency insulation material, shows advantages that traditional materials (such as glass wool, rock wool) cannot match when used in steam insulation pipes, especially in extreme conditions and high-performance demand scenarios. The core competitiveness of nano aerogel in steam insulation pipes lies in “extreme insulation, ultra-light and ultra-thin, wide temperature durability,” making it especially suitable for high-temperature, high-humidity, space-constrained, or scenarios with strict safety and environmental protection requirements. Although the initial cost is relatively high, its long-term energy-saving benefits, maintenance cost savings, and space efficiency improvements make it an ideal choice for high-end industrial insulation. With technological advancements and large-scale production, the application of aerogel will gradually penetrate from high-value-added fields to conventional steam systems.

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  • Hebei Yuanfeng Pipeline Engineering Co., Ltd.
  • +86 4000-789-889 service@cnyufe.com
  • Building 34, Wanhe Mingzhu, Luquan District, Shijiazhuang City, 1-501.
  • Hebei Yuanfeng Pipeline Engineering Co., Ltd. was established in 2013 with a registered capital of 22.18 million yuan. It is a comprehensive R&D service enterprise focused on the production of steel jacketed steel direct-buried steam pipes, polyurethane direct-buried insulation pipes, spray-wound insulation pipes, galvanised iron overhead insulation pipes, PERT-II type insulation pipes, insulation pipe fittings, and joint installation. The company has strong production capabilities. Currently, it owns five production lines for polyurethane spray polyethylene wound prefabricated direct-buried insulation pipes, with an annual production of over 3,000 km of DN500mm-DN1600mm polyurethane spray polyethylene wound prefabricated direct-buried insulation pipes; 20 automatic winding machines for steel jacketed steel direct-buried steam insulation pipes, 8 sets of fully automatic pipe threading machines, 3 CNC intersecting line cutting machines, 2 pipeline fitting welding machines, 2 CNC plasma cutting machines, 10 external clamp cutting beveling machines, and 12 argon arc welders. It has 10 high-density polyethylene outer protective pipe production lines, with extrusion diameters reaching φ2000mm. The outer protective pipe production lines adopt advanced processes such as single-screw extrusion, vacuum sizing, corona treatment, spray cooling, and automatic cutting, capable of producing 30,000 tonnes of various types of high-density polyethylene outer protective pipes each year with diameters ranging from φ90-φ2000mm; 6 polyurethane prefabricated direct-buried insulation pipe production lines, 3 PU600 high-pressure foaming machines, capable of producing 5,000 km of DN20~DN1600mm insulation pipes; and 3 prefabricated overhead type polyurethane insulation pipe production lines, with an annual production of 2,000 km of DN25-DN1400mm prefabricated overhead type polyurethane insulation pipes. The company has production bases in Hebei, Inner Mongolia, Tianjin, and Liaoning, covering a total area of over 500 acres. The company's products cover China and more than 20 other countries and regions, including Mongolia, Russia, the Middle East, and South Africa. The products are mainly used for high-temperature steam transportation, central heating, and central cooling. Relying on advanced production technology, complete supporting equipment, and supply service systems, the company provides high-standard pipeline products to a wide range of customers, ensuring the safe operation of long-distance pipeline networks.

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  • Hebei Yuanfeng Pipeline Engineering Co., Ltd.
  • +86 4000-789-889 service@cnyufe.com
  • Building 34, Wanhe Mingzhu, Luquan District, Shijiazhuang City, 1-501.
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