TPEP hot-melting 3PE anti-corrosion steel pipe and preparation process thereof

Abstract

The invention discloses a TPEP hot-melting 3PE anti-corrosion steel pipe and a preparation process thereof.The TPEP hot melting 3PE anti-corrosion steel pipe comprises a steel pipe body, an inner layer, a bottom layer, a middle layer and an outer layer, and the inner layer is coated inside the steel pipe body. According to the steel pipe, the sintered epoxy powder is adopted as the bottom layer, chemical bonding with the middle layer is facilitated, such that the corrosion resistance and cathodic disbonding resistance of the steel pipe are improved, and meanwhile, the middle layer is a copolymer adhesive, plays a role in bonding the bottom layer and the outer layer and is beneficial to resisting a shear force caused by soil movement and temperature change, and at the same time, the outer layer is arranged, so that the steel pipe has excellent moisture resistance, the bottom layer and the middle layer are convenient to protect, the coating process can be completed through the same process, such that the cost for purchasing needed production equipment is reduced, and the needed energy consumption is reduced; meanwhile, the quality of the steel pipe is improved, the steel pipe is wrapped with antirust paper, then moisture in the environment for storing the steel pipe is reduced, such that a phenomenon of secondary rusting of the steel pipe is avoided, and thus, the working efficiency is further improved.

Description

technical field [0001] The invention relates to the technical field of steel pipe anticorrosion, in particular to a TPEP hot-melt 3PE anticorrosion steel pipe and a preparation process thereof. Background technique [0002] In our daily life, anti-corrosion steel pipes play an important and unique role. Anti-corrosion steel pipe generally refers to the use of special technology to process ordinary steel pipes so as to have a certain anti-corrosion ability. Anti-corrosion steel pipes are mainly used in fields with special engineering requirements or harsh environments. Corrosion of chemical or electrochemical reactions occurs in the medium, so the use of anti-corrosion steel pipes is also increasing. The common types of anti-corrosion steel pipes are epoxy coal tar anti-corrosion steel pipes, polyurethane coating anti-corrosion steel pipes, IPN8710 non-toxic coating anti-corrosion steel pipes, 3PE anti-corrosion steel pipes , epoxy powder anti-corrosion steel pipe, chlorinat...

AI Technical Summary

Problems solved by technology

Anti-corrosion steel pipe generally refers to the use of special technology to process ordinary steel pipes so as to have a certain anti-corrosion ability. Anti-corrosion steel pipes are mainly used in fields with special engineering requirements or harsh environments. Corrosion of chemical or electrochemical reactions occurs in the medium, so the use of anti-corrosion steel pipes is also increasing. The common types of anti-corrosion steel pipes are epoxy coal tar anti-corrosion steel pipes, polyurethane coating anti-corrosion steel pipes, IPN8710 non-toxic coating anti-corrosion steel pipes, 3PE anti-corrosion steel pipes , epoxy powder anti-corrosion steel pipe, chlorinated rubber anti-corrosion steel pipe, etc., the original product is in accordance with the requirements of GB / T23257-2009 buried steel pipeline polyethylene anti-corrosion layer, using the method of winding 3PE external anti-corrosion pipe, using intermediate frequency furnace to The steel pipe is heated, the temperature is controlled between 180-200 °C, and the sheet is extruded by the extruder of glue and polyethylene for winding. After the winding is completed, it is cooled in water, but in the process of preparing the product, the investment in equipment is large. , high energy consumption, and the anti-corrosion layer of the steel pipe weld is prone to vacuum parts. At the same time, during the preparation process, the derusted steel pipe is easy to contact with the moisture in the air to produce rust, and a second derusting is required, which reduces the work efficiency

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