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HEAVY CORROSION PROTECTIVE COVERING STEEL PIPE AND HEAVY CORROSION PROTECTIVE COVERING STEEL PIPE PILE, AND ITS MANUFACTURE AND ITS MANUFACTURING DEVICE
HEAVY CORROSION PROTECTIVE COVERING STEEL PIPE AND HEAVY CORROSION PROTECTIVE COVERING STEEL PIPE PILE, AND ITS MANUFACTURE AND ITS MANUFACTURING DEVICE
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机译:重型防腐覆盖钢管桩及其制造和制造装置
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摘要
PROBLEM TO BE SOLVED: To improve shear tightening strength between a polyethylene layer and a mortar layer, by forming helical protuberance on the surface of the polyethylene layer, in a heavy corrosion protective covering steel pipe in which a polyethylene adhesives layer and a polyethylene layer are sequentially laminated via a primer layer coated on a surface of a preserved steel pipe. ;SOLUTION: In a polyethylene covering steel pipe which is used in a variety of buried pipes and a steel pipe pile, a primer layer 2, a polyethylene adhesive layer 3, and a polyethylene layer 4 are sequentially laminated on an outer surface of a preprocesses steel pipe 1 or a steel pipe pile 1, and then a fiber reinforced plastics layer 6 or a mortar layer 6 are laminated. On the outer layer of the polyethylene layer 4, helical protuberance 5 which is 0.1-5 mm high and 3-100 mm wide is formed, in order to improve shear tightening strength between the polyethylene layer 4 and the laminated fiber reinforced plastic or mortar. When it is necessary to color the coating for harmony with environment, a color pigment is previously mixed and the fiber reinforced plastic layer 6 or the mortar layer 6 is colored.;COPYRIGHT: (C)1998,JPO
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