Overview
Closed-cell polyurethane shell, known as 闭孔聚氨酯瓦壳 in Chinese, is a specialized insulation material designed for industrial and commercial applications. Composed of rigid polyurethane foam, it features a closed-cell structure that provides superior thermal insulation and moisture resistance. The material is widely used in piping systems, HVAC installations, and refrigeration units due to its durability and energy efficiency. The shells are typically manufactured in semi-cylindrical or segmented designs, allowing for easy installation around pipes of various diameters. Unlike open-cell foam, the closed-cell structure minimizes water absorption, making it suitable for both indoor and outdoor use in diverse climatic conditions.
Physical and Chemical Properties
Closed-cell polyurethane shells exhibit a density range of 30-50 kg/m³, striking a balance between lightweight handling and structural integrity. The material's thermal conductivity is exceptionally low, often below 0.025 W/(m·K), which contributes to its excellent insulation performance. Its closed-cell structure provides inherent moisture resistance, with water absorption rates typically below 3% by volume. Chemically, these shells demonstrate good resistance to oils, many solvents, and mild acids, though they may degrade when exposed to strong acids or bases. The material is typically flame-retardant, meeting various international fire safety standards. Some formulations include additives to enhance UV resistance for outdoor applications, preventing degradation from prolonged sun exposure.
Main Applications
The primary application of closed-cell polyurethane shells is in thermal insulation for industrial piping systems, particularly in the oil and gas, chemical processing, and power generation sectors. They effectively prevent heat loss in hot pipes and condensation on cold pipes, significantly improving energy efficiency. In HVAC systems, these shells are used to insulate both supply and return ducts, as well as chill water pipes. Another important application is in refrigeration systems, where they maintain consistent temperatures in cold storage facilities and refrigerated transport. The material's moisture resistance makes it particularly valuable in these applications, preventing the formation of ice and maintaining insulation performance. Some specialized versions are used in marine applications due to their resistance to saltwater corrosion.
Safety and Storage
While polyurethane foam is generally safe when installed, proper precautions should be taken during handling and installation. Cutting or machining the material generates dust that may irritate respiratory systems, necessitating the use of dust masks and proper ventilation. The material should be stored in a dry environment, protected from direct sunlight to prevent surface degradation. Fire safety is an important consideration. Although many formulations are flame-retardant, they can still burn under intense heat. Installations in high-temperature environments or near potential ignition sources should use specially rated materials. Proper installation techniques, including sealing joints with appropriate adhesives or tapes, are crucial to maintain the material's performance characteristics over time.
B2B Procurement Guide
When procuring closed-cell polyurethane shells, buyers should clearly specify the required inner diameter, wall thickness, and length of the shells to ensure proper fit on existing pipes. The density of the material should be verified, as it directly affects both insulation performance and mechanical strength. For outdoor applications, UV-resistant formulations should be specified. Quality certifications such as ASTM or ISO standards should be requested to ensure material consistency and performance. Bulk purchasing typically offers cost advantages, but storage space requirements should be considered. Lead times may vary depending on customization needs, so planning procurement well in advance of installation schedules is recommended. Some suppliers offer pre-cut or pre-formed solutions for complex pipe configurations.
Related Manufacturers
- 主营：[]
- 主营：岩棉板、岩棉管、橡塑管、聚氨酯管壳、玻璃棉板、玻璃棉管、硅酸铝针刺毯、硅酸铝管、UPVC彩壳、挤塑板、铁皮保温、岩棉保温板、橡塑板、橡塑保温板、橡塑保温管、玻璃棉卷毡、pvc彩壳
- 主营：岩棉板、岩棉管、橡塑板、聚氨酯板、聚氨酯管、聚氨酯管壳、聚氨酯瓦壳、聚氨酯管托、橡塑管
- 主营：轻集料混凝土、轻骨料混凝土、轻集料、轻骨料、钢结构防火涂料、防火包裹、防排烟防火包裹、硅酸铝防火包裹、硅酸盐防火包裹、硅酸盐纤维防火柔性卷材、空调木托
- 主营：四氟垫片、聚四氟乙烯垫片、石棉垫片、聚氨酯瓦壳、橡胶垫片、金属缠绕垫片、石墨垫片、膨体四氟垫片、软四氟垫片、四氟乙烯垫圈、耐油石棉垫片、氟橡胶垫片、异形密封垫片、石墨四氟垫片、防火涂料、钢结构防火涂料、四氟复合垫片、防火板
- 主营：酚醛保温板、聚合聚苯板、聚合聚苯板造型线条、聚氨酯保温板、聚氨酯管壳、聚氨酯复合板、聚氨酯夹心板、聚氨酯封边岩棉板、AEPS保温板、挤塑聚苯板、真金保温板、酚醛板、水泥发泡板、热固复合聚苯板、挤塑板、保温结构一体板、免拆模一体板、岩棉板、玻璃棉管、玻璃棉卷毡、气凝胶毡、防水背衬板、酚醛复合风管、阻尼隔音毡、硅酸铝管
- 主营：空调管保温、消防管道保温、橡塑保温施工、聚氨酯瓦壳、管道保温施工、橡塑管道保温、橡塑保温板、橡塑保温管、橡塑板、橡塑管、太阳能管道铝皮保温、消防管道铁皮保温
- 主营：聚氨酯喷涂、聚氨酯板、聚氨酯管壳、聚氨酯外墙喷涂、聚氨酯瓦壳、聚氨酯弧形板、铝箔聚氨酯管壳、聚氨酯隔热保冷管托、聚氨酯管壳保冷、硬质聚氨酯管壳、保温聚氨酯管壳、保冷聚氨酯瓦壳、聚氨酯管托、聚氨酯外墙喷涂施工、聚氨酯外墙喷涂保温、聚氨酯喷涂施工、内墙聚氨酯喷涂、鸡舍聚氨酯喷涂、硬质聚氨酯喷涂、冷库喷涂、PIR保冷管托、冷库喷涂施工
- 主营：硅酸铝管、硅酸铝针刺毯、岩棉毡、聚氨酯管、岩棉板、硅酸铝板、玻璃棉管、岩棉管、橡塑板、防火包裹、硅酸盐板、硅酸盐管、玻璃棉板、玻璃棉卷毡、泡沫玻璃弧形板、泡沫玻璃管壳、泡沫玻璃板
- 主营：PIR保冷管壳、聚异氰脲酸酯保冷管壳、保冷绝热管壳、聚氨酯管托、聚氨酯管壳、聚氨酯保冷管壳、聚氨酯保冷瓦壳、聚氨酯保温管托、聚氨酯发泡管托、聚氨酯弯头、聚氨酯保温弯头、聚氨酯直埋弯头、聚氨酯发泡弯头、耐低温PIR管托、HDPU保冷管托、金属缠绕垫片、304内外环缠绕垫片、石墨垫片、石墨冲孔垫片、石墨包边垫片、聚四氟垫片、保冷施工、聚四氟包覆垫片、膨体四氟垫片、碳素盘根
- 主营：复合硅酸盐管壳、硅酸铝针刺毯、硅酸铝管壳、聚氨酯管壳、聚氨酯管托、聚氨酯黑白料、复合硅酸盐板、泡沫玻璃板、泡沫玻璃管、橡塑管、橡塑板、水泥发泡板
- 主营：橡塑保温、风道保温、管道罐体保温、聚氨酯管壳、罐体保温施工、铁皮保温施工、钢结构玻璃棉、管道保温施工
- 主营：STP真空绝热板、玻璃棉管、离心玻璃棉板、聚氨酯管壳、气凝胶毡、橡塑板、B1级橡塑板、橡塑海绵板、橡塑保温板、橡塑管、橡塑海绵管、B1级橡塑管、岩棉管、橡塑保温管、硅酸铝管、硅酸盐管、水泥砂浆岩棉复合板、玻璃棉卷毡、硅酸盐保温管、钢结构玻璃棉
- 主营：橡塑板、铝镁质、挤塑板、聚氨酯板、聚氨酯管、橡塑管、岩棉板、酚醛板、地暖xps、硅酸铝管、玻璃棉、保温管、绿都橡塑板、铝箔橡塑、硅酸盐板、橡塑胶水、泡沫玻璃、硅酸铝针刺毯、硅酸铝管壳
- 主营：聚氨酯瓦壳、聚氨酯管壳、聚氨酯弯头、聚氨酯垫木、聚氨酯垫块、聚氨酯弧形板、聚氨酯管托、保温隔热管壳、阻燃玛蹄脂、pir保冷管壳
- 主营：橡塑保温管、硅酸铝针刺毯、岩棉板、聚氨酯管壳、硅酸盐纤维防火卷材、橡塑保温材料、保温装饰一体板、纳米气凝胶毡、钢骨架轻型屋面板、天基板、钢骨架轻型板、酚醛板、防水透气膜、泡沫玻璃板、挤塑板、岩棉管、玻璃棉管、硅酸铝管、石墨聚苯板、STP真空绝热板、玻璃棉卷毡、复合硅酸盐板、岩棉毡、离心玻璃棉板