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近来,防腐技术已大大提高,进步较快,管道防腐也有显著提高。作为防腐使用的包复材料聚乙烯(以下称 PE)已被广泛采用。最近,对聚乙烯的防腐性、强度及冲击性等、研究表明,已经能实际应用了。1979年以来,我们对外径20英寸(508 mm)～64英寸(1626mm)的钢管进行了 PE 包复。有600米管线横跨地中海海底,有地处热带的60英寸(1524mm)的沙特阿拉伯淡水输送管线,还有寒冷地带的苏联天然气管线等。最近,由于出现了天然气在高压下、重油在高温下输送的情况,管线的工作温度提高了,那么采取 PE 包复的钢管的性能能否适应,多少温度合适是非常有意义的。
Recently, anti-corrosion technology has been greatly improved, faster progress, pipeline corrosion has also been significantly improved. As anticorrosion coating material polyethylene (hereinafter referred to as PE) has been widely used. Recently, the anticorrosion, strength and impact resistance of polyethylene, etc., studies have shown that it has been practical application. Since 1979, we have PE-coated steel tubes from 20 “(508 mm) OD to 64” (1626 mm) OD. There are 600 meters of pipeline across the undersea of the Mediterranean Sea, the tropical 60-inch (1524mm) freshwater Saudi Arabian pipeline and the Soviet gas pipeline in cold regions. Recently, due to the emergence of natural gas under high pressure, heavy oil transported at high temperatures, the working temperature of the pipeline increased, then take PE clad steel pipe performance can adapt to the number of appropriate temperature is very meaningful.