DACANG TIANDI
DACANG TIANDI
The three-layer PE process is widely used in anticorrosion of steel pipes at home and abroad, and applied to oil and gas transmission, urban gas supply and water supply and other fields. The 3-layer PE anticorrosion structure includes fusion bonded epoxy-powder bottom layer, polymer adhesive middle layer and polyethylene top layer. The epoxy powder is a kind of thermosetting nontoxic coating, forming the high molecular weight cross-linking structure coating after solidifying, featuring good chemical anticorrosion & higher mechanical properties. The function of epoxy powder bottom layer is to form continuous coating, providing excellent adhesion by agglutinating and solidifying the steel tube surface with good chemical resistance and cathodic disbanding resistance. The function of polymer adhesive is to agglutinate the epoxy powder before gelation, and to agglutinate the polyethylene top layer, which unites all three layers together.
Cooperating with the conveyor delivering steel pipes(straight pipe, bend or multi-pipe), cone, structural steel and steel sheet, etc., this operation line utilizes the high speed steel shot flow generated by shot blasting machine to strike off the oxide scale, rust and other sundries from the pipe surface to have a good effect of degusting, reaching the national. standard of SA2-SA3 in SR/TQ4I4-98. It can improve the tensile and compressive resistance of the pipe surface and can also possess the reliable depth of abrasion pattern, so as to get strong adhesion of the coating on the pipe with a satisfying result of anticorrosion and thermal insulation. Meanwhile, the degusting speed can be adjusted as l-6m/min according to different types.
This line adopts hydraulic, electric impeller head or air pressure grit-blasting gun to eliminate rust for internal pipes. We adopt steel grit to derust pipes less than 700mm and steel shot to derust ones more than 700mm .
The derusting efficiency is 80-150m2/h and the derusting effect can reach 2.5-3 level. It is composed of pipe-rotating machine, grit-blasting trolley, shot blasting trolley, impeller head, shot blasting machine, steel shot recycling line, butt pipe trolley, shot collecting box, shot dust separator, dust removal system and operation platform.
The high-speed nozzle of high-pressure airless spraying machine is used to spray all kinds of powder and liquid anticorrosive coatings evenly to the inner wall of steel pipe, so as to achieve the purpose of anticorrosion, drag reduction and prolonging the service life of steel pipe.
It is widely used, reliable, efficient and safe.
The world's first patented product was awarded the second prize of national science and technology progress. The technology wraps the anticorrosive layer, insulation layer and protective layer on the outer wall of the steel pipe at the same time, so that the bonding between the layers is accurate and firm, and the jacket layer with excellent anticorrosive and thermal insulation effect is formed. It has the following
Outstanding advantages:
a -- High automation, continuous operation and high production efficiency.
b -- Good anti - UV and anti - aging effect.
c -- Extensive use of materials (Epoxy powder and other coatings can be used.), low cost, energy saving and low pollution.
The patented product of Dacang adopts the unique embedded electric heating sheet and hot pressing technology, and the novel joint way, which makes the product have extremely high adhesion and stability, overcomes the shortcoming of insufficient adhesion between the foaming layer and the filler material in the past, and solves a big problem of the sealing of the insulation pipe.
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Dust removal and recycle system
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Pipe external coating machine
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Pipe internal coating machine
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Vertical derusting machine
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Horizontal derusting machine
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Waist drum wheel conveyor
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Platform bridge
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Rotary elevator
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Hydraulic pipe groove machine
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Electric PE pipe beveling machine
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Extruder
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Powder spraying equipment
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Liquid spraying equipment
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IMF heating equipment
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Electric control equipment
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Hydraulic/Pneumatic equipment
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