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法国S·I·F公司研制成功用于输送煤气、石油、化学产品和水等各种类型物质的钢管内外壁涂层工艺。该涂层具有高强度、高耐蚀、耐磨等特点,延长了使用寿命,安全可靠。对输送水、煤气、石油和其它流体物质,在温度不超过40℃的情况下可连续工作。但在钢管外表面要涂以煤焦油或沥青。如温度不超过80℃。在连续工作时,钢管外部应涂以聚乙烯树脂涂层。聚乙烯涂层的强度大大超过煤焦油。涂模的强度,特别是在高温和低温情况下尤甚。为确保涂层的粘结强度,在钢管表面上喷涂粘胶底漆(膜厚250～300μm),或静电喷涂上100～200μm厚膜,然后再在上面喷涂上聚乙烯膜,厚度为1.8～3.5μm。涂层工艺分两种:一种是把玻璃纤维预先
France S · F company successfully developed for the transportation of gas, petroleum, chemical products and water and other types of steel pipe inside and outside wall coating process. The coating has high strength, high corrosion resistance, wear resistance and other characteristics, extending the service life, safe and reliable. On the transport of water, gas, petroleum and other fluid substances, the temperature does not exceed 40 ℃ in the case of continuous work. However, the outer surface of steel pipe coated with tar or tar. If the temperature does not exceed 80 ℃. In continuous operation, the outer pipe should be coated with polyethylene resin coating. The strength of polyethylene coating greatly exceeds that of coal tar. Die coating strength, especially in the case of high temperature and low temperature especially. In order to ensure the bond strength of the coating, the surface of the steel pipe is sprayed with a viscose primer (film thickness of 250-300 μm) or a 100-200 μm thick film of electrostatic spray coating, and then a polyethylene film is sprayed thereon to a thickness of 1.8-2.0 mm, 3.5 μm. The coating process is divided into two kinds: one is to put the glass fiber in advance