久久精品道一区二区三区,波多野结衣AV一区二区三区中文,一区二区三区动漫成人在线观看女人18毛片a级毛片一区**区,人人妻人人澡人人爽人人精品电影,中文字幕一区二区在线观看国产一区二区免费播放,国产精品一区二区久久宅男宅女,99热在线精品免费播放6,国产成人啪精品视频免费网站

3PE steel pipe anticorrosion process flow chart detailed introduction

Pipeline three layer PE anti-corrosion structure: the first layer of epoxy powder (FBE > 100um), second layers of adhesive (AD) 170 ~ 250um, third layers of polyethylene (PE) 2.5 ~ 3.7mm. The three materials are one of the materials, and the steel pipe is firmly combined with the formation of excellent corrosion protection layer.

Range of the diameter of phi 159 ~ Phi 1220 2PE anti-corrosion: pipeline layer PE anti-corrosion structure, the first layer adhesive (AD), the second layer of polyethylene (PE), two kinds of materials as a whole, the thickness of each layer and three layer PE.

3PE anticorrosion layer is composed of epoxy powder primer, intermediate adhesive layer, outer layer of polyethylene composite consisting of a kind of anticorrosion structure, with high mechanical strength, excellent electrical insulation properties, high degree of mechanization of the production line operation, technological parameters is relatively stable, does not pollute the environment, etc., in the domestic in recent years, the focus of pipeline anticorrosion engineering has been widely used.