According to the structure in the form of insulation and high temperature heat medium pipe division prefabricated buried pipe insulation (1) disengaging insulation pipe: steel pipe coating and insulation between the low melting point of the coating layer insulation insulation shell, such as low-grade asphalt, heavy oil. It melts when heated pipes free expansion polyurethane insulation shell, insulation and backfill sand remain stationary in the insulation. This disengagement type is mainly used for high temperature insulation pipe polyethylene pipe insulation composite skin, such as steam pipes. Polyurethane Foam has obvious advantages: 1. Polyurethane foam material has a multi-purpose function pipe insulation, along with insulation, water, noise, vibration absorption and many other features. 2. Insulation performance, is all the domestic building materials lowest thermal conductivity (≤0.024), the highest heat resistance of insulation materials, thermal conductivity is only half of the EPS foam polystyrene board. Polyethylene insulation shell | Kodak yellow jacket pipe insulation (certified) | Lacey insulation provided by the Building Materials Co., Ltd. Weifang Kodak. Weifang Kodak Building Materials Co. (www.wfkdjc.com) Shandong Weifang, the other leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Kodak leadership with the staff warmly welcome all inquiries negotiations to create a better future for Kodak.