关键词: 聚乙烯复合带, 防腐, 弯管, 管道建设

Abstract: Compared with the 3LPE anti-corrosion technology of straight pipe, the present anti-corrosion technology for bend pipe is inferior in the aspects of the mechanization level and anti-corrosion quality. Therefore, the anti-corrosion technology for polyethylene composite tape coating of bend pipe was developed. Its coating structure is in accord with the 3LPE of straight pipe. A composite tape by heating special polyethylene materials with adhesives was made. Then by virtue of mechanical transmission and automatic control, winding the polythylene composite tape around the heated bend pipe, the mechanized operation of bend pipe anti-corrosion was achieved. This technology is a breakthrough in the bend pipe anti-corrosion because it is less in equipment investment, excellent in anticorrosion quality, easy and simple to control and high in producing efficiency. Until now, 1538 bend pipes have been applied practically in the field. It works stably, the anti-corrosion quality and service life of the bend pipe is the same as the straight pipe. This product provides a reliable anti-corrosion means for oil and gas pipeline construction.

Key words: polyethylene composite tape, anti-corrosion, bend pipe, pipeline construction