KR200221323Y1 - covering steel sticking electricity form wire - Google Patents

Abstract

The present invention relates to a coated steel pipe with a wire attached to the coated steel pipe to facilitate on-site electrical construction, and to prevent corrosion caused by damage to the inner and outer surfaces generated during the site construction. By coating a coating material such as epoxy, ceramic collal enamel, asphalt, polyurea, polyurethane, and stripping the tube ends, welding the wire to the stripping portion, and then coating the coating with epoxy, ceramic, polyurea, polyurethane, or paint. Since the wire is attached to the steel pipe, the construction cost can be saved by shortening the combined construction process of directly welding and attaching the coated steel pipe in the field. This prevents damage to the inside and outside of the coated or coated steel pipe.

Description

Covering steel sticking electricity form wire}

The present invention relates to a coated steel pipe, in particular, to the coated steel pipe attached to the wire to facilitate on-site electrical construction, and to the coated steel pipe with a wire to prevent corrosion caused by damage to the inside and outside of the pipe during the site construction It is about.

Conventionally, it is used by coating with polyethylene (PE), collal enamel, asphalt, etc. to prevent corrosion of steel pipes, but when the joint or coating part of the coating pipe is damaged around the coating and the steel part is exposed, the corrosion of the part is prevented. And shortened the life of the coated steel pipe.

In addition, since the sacrificial anode is welded and attached during construction in the field, the construction process is complicated and the coating cost of the inner surface is damaged during welding, and corrosion is generated on the inner surface. As a result, the construction cost increases, and the performance test cannot be performed after welding.

Referring to the manufacturing process of the conventional coated steel pipe as follows.

Raw material deposit → Pipe processing → Exterior shot treatment → Preheat → Spot adhesive application → Primary PE coating → Cooling → (Separant coating → Secondary PE coating → Cooling →: Manufacturing process in P2S production) Pinhole inspection → Pipe end Stripping ① ① End of pipe groove, ② End of end ring welding, ③ End of pipe end treatment, ④ End of pipe extension → Inner shot treatment → Inner coating → Outer tube end coating → Hardening → Final inspection → Cap mounting → Shipping.

According to the above manufacturing process, if the pipe end is processed and delivered to the construction site, if the welding method is adopted, butt welding, or one side is expanded and welded, and the welding site is finished with PE tape to finish the work. Therefore, after welding, the sacrificial anode is attached to the field and finished with PE tape.

In case of joint construction, it is almost impossible to finish by attaching sacrificial anodes in the field. Because when the sacrificial anode is attached to the coated steel pipe in the field, it is necessary to peel off the existing coating and weld it. In this case, the coating part on the inside and the outside of the pipe is damaged and must be repaired. Construction costs are also excessive, but quality assurance is difficult.

In addition, when the construction is completed without attaching the sacrificial anode, the damage of the coating due to the welding site and other construction is rapidly corroded, which greatly shortens the life of the coating pipe.

The purpose of the present invention for solving the above problems is to install the wires at both ends of the coated steel pipe in the coating manufacturing plant to be installed in the field by connecting the wires at both ends of the pipe, and to attach a sacrificial anode at a certain distance It not only prevents corrosion of the inside and outside of the steel pipe, but also increases the service life of the pipe.

1 is a cross-sectional view of the groove and ring joint applied to the present invention.

Figure 2 is a cross-sectional view of the tube treatment method for each use of the coated steel pipe with a sacrificial anode according to the present invention.

<Explanation of main symbols in drawing>

1: polyethylene, epoxy or other resin 2: coated wire

3: epoxy coating or other paint coating

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment according to the present invention.

An embodiment of the coated steel pipe with an electric corrosion wire of the present invention,

Cover the pipe with polyethylene, epoxy, ceramic collal enamel, asphalt, polyurethane, polyurea, etc., and then peel off the tube end. It is preferable to coat with a ceramic, polyurea, polyurethane or paint.

It is preferable to use copper wire as a material for the wire.

The wire is preferably insulated coated.

Figure 2 is a cross-sectional view of the tube end treatment method for each use of the coated steel pipe with the present invention, as described with reference to Figure 1 as follows.

The steel pipe is coated with polyethylene, epoxy, ceramic collal enamel, asphalt, polyurea, polyurethane or other resin (1), and the tube ends are peeled off. In addition, the coated steel pipe is subjected to the tube joint treatment for the groove joint, the tube joint treatment for the ring joint according to the diameter.

The coated steel pipe for the groove joint is jointed to the machined groove, and the coated steel pipe for the ring joint is jointed to the welded ring.

After the wire 2 is joined to the pipe peeling part, the stripping part to which the wire 2 is attached is coated with a paint 3, and the wire 2 is insulated coated.

Therefore, the wire is attached to the coated steel pipe by the manufacturing process and shipped.

Referring to the manufacturing process of the coated steel pipe with a tube end wire in detail as follows.

Raw material deposit → Pipe processing → Exterior shot treatment → Preheat → Spot adhesive application → Primary PE coating → Cooling → (Separant coating → Secondary PE coating → Cooling →: Manufacturing process in P2S production) Pinhole inspection → Pipe end Stripping → ① Grooving of end of pipe ② Ring welding of end of pipe → Inner shot treatment → Sacrificial anode welding → Inner coating → Outer pipe end coating → Hardening → Final inspection → Cap installation → Shipping.

In recent years, it is common to prevent the corrosion of welded parts due to welding and to construct the pipe as a joint to withstand earthquakes. When attaching, there is a problem in that it is necessary to attach a piece of paper, as well as a lot of costs and practically impossible situation, when the production in the factory according to the manufacturing process attached to the wire to deliver the problem can be completely eliminated.

As described in detail above, the present invention is because the wire is attached to the coated steel pipe, the construction cost is saved by shortening the combined construction process of welding attaching during electrical construction in the field, and shipped after confirming the quality of the product in the production plant Therefore, it prevents defects occurring during construction and does not cause damage to the inside or outside of the coated or coated steel pipe.

Claims (3)

Cover the pipe with polyethylene, epoxy, ceramic collal enamel, asphalt, polyurethane, polyurea, etc., and then peel off the tube end. Coated steel pipe with a wire, characterized in that the coating with a ceramic, polyurea, polyurethane or paint. The coated steel pipe with a wire according to claim 1, wherein the wire is made of copper wire. 3. The coated steel pipe with a wire according to claim 2, wherein the wire is insulated coated.