JP2699157B2 - Rust prevention tape for welding groove - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to relates to an open crest anticorrosive tapes for welding to rust the period GMA surface from forming an open crest until subjected to welding of the steel member.

[0002]

2. Description of the Related Art When welding steel plates for steel structures or welding pipe members of a pipeline together, a groove surface is usually formed at the end of the steel plate or at the end of the tube.
If the welding conditions are severe, the groove surface is formed, and then the groove surface and the vicinity thereof are polished, and the welding is performed without any rust or foreign matter on the groove surface. By the way, after forming a groove surface on a steel plate or pipe, a period of several days or months often elapses before welding and joining, but in this case, if rust occurs on the groove surface, immediately before the welding joint The groove face needs to be polished, which requires a great deal of labor and cost. Therefore,
Conventionally, in order to prevent rust on the groove surface, a paint for rust prevention is applied to the groove surface, and the rust prevention paint is removed with a grinder or other manual tool immediately before welding. Have been done. However, since removing the rust preventive paint requires a great deal of labor and cost, various rust preventive agents that can be welded without removal have been put to practical use. This kind of rust preventive forms a thin rust preventive film by a spray method and is considerably expensive. It is also said that welding with the rust preventive applied has no adverse effect on the quality of the welded portion (see, for example, JP-A-60-92074).

On the other hand, an anticorrosion tape suitable for anticorrosion, waterproofing, masking, and the like of a metal tube or the like, in which a synthetic rubber adhesive layer such as a butyl rubber compound is formed on a synthetic rubber tape base material such as ethylene propylene rubber. Anticorrosion tapes having a release tape interposed on the surface of the layer are also commercially available and have been applied to various uses. In this anticorrosion tape, the adhesive strength of the adhesive layer to the article is high, but the bonding force of the synthetic rubber itself forming the adhesive layer is sufficiently strong, so that when the adhesive is peeled off after adhering to the surface of the article, it completely adheres to the article surface. It is characterized in that it is peeled off without remaining.

[0004]

However, the rust preventive only forms a very thin rust preventive film on the groove surface by spraying, so that rust prevention is not required for a short period of time but for a long period of time. It does not withstand rust sufficiently. For example, when constructing a pipeline for a thermal power plant, several months pass from the beveling of the short pipe to the welding work, so even if a rust inhibitor is applied to the beveled surface, Since it is not possible to achieve complete rust prevention, in practice,
The groove surface is polished to a mirror surface by a manual tool and then welded. For example, since polishing of a pair of groove surfaces of a pipe material having a diameter of 600 mm requires about five hours of man-hour, the polishing cost becomes large. In addition, if grinding is omitted and the groove surface is welded and joined with the rust preventive applied, any foreign matter generated from the rust preventive will dissolve into the deposited metal,
It is not preferable in terms of welding quality. An object of the present invention is to <br/> provide open crest anticorrosive tapes for welding can rust reliably and at a lower cost groove surface.

[0005]

According to a first aspect of the present invention, there is provided a rust-preventive tape for welding a groove for attaching to a groove of a steel member to prevent rust. A tape base made of synthetic rubber , a synthetic rubber adhesive layer formed on one surface of the tape base, and a release tape releasably attached to the surface of the adhesive layer. is there.

[0006]

According to a first aspect of the present invention, there is provided a welding groove rust-preventing tape for attaching to a groove of a steel member to prevent rust. when rust open crest welding by rust tape Zhou that by peeling off the exfoliation tape adheres the synthetic rubber adhesive layer groove surface and its vicinity of the site
Paste in the state . As a result, it is synthesized on the outer surface of the rust prevention tape.
The rubber tape base material appears. When removing the rust-preventive tape during welding, pull the tape base material to separate it, and the tape base material and the adhesive layer will be peeled off, leaving no foreign matter such as dust on the groove surface. A face appears.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. This embodiment is applied in the period after forming the welding GMA surface tubing ends of the pipeline until subjected to welding, the present invention groove surface rust tape to rust the opening crest welding This is an example of the case.

[0008] As shown in FIG. 1, the groove surface rust tape
The rust-prevention method of the welding groove surface applying the method includes a polishing step of forming the welding groove surface 11 (see FIG. 3) at the end of the pipe material 10 and then polishing the groove surface 11 and the vicinity thereof; a groove surface 11 that is a wiping step of wiping the portion near a solvent, a wiped groove surface 11 and its vicinities in a solvent, and tape applying step of attaching the anti Sabite over 15, groove surface before performing the welding 11, and a peeling step of peeling off the anti Sabite-loop 15 and groove surface 11 from the vicinity of the site.

The pipe material 10 of the pipeline P has a length 12
m, having a diameter of 600 mm, and a groove surface 11 is formed at both ends as shown in FIG. Next, the four steps will be sequentially described in detail. First, in the polishing step, the groove surface 11 and the vicinity thereof are mirror-polished with a predetermined polishing tool or the like so that rust or foreign matter does not exist on the groove surface 11 and the vicinity thereof. Next, in the wiping step, the groove surface 11 and the vicinity thereof are wiped with a solvent such as alcohol or acetone to remove water and oil.

[0010] Next, in the tape attaching step, as shown in FIGS. 2, 3, the anti Sabite-loop 15, the adhesive layer 17 paste in a state of close contact with the vicinity portions groove surface 11 . Here, to describe the anti Sabite-loop 15, Fig. 4
As shown in, anti Sabite-loop 15, a synthetic rubber (e.g.,
0.3-0.5mm thick made of ethylene propylene rubber)
The tape base 16 comprises an adhesive layer 17 having a thickness of 0.3 to 0.5 mm and a release tape 18 mainly composed of a tape base 16 of synthetic rubber (for example, butyl rubber compound).
The adhesive layer 17 having high releasability is formed on the surface of the substrate.
Incidentally, the adhesive layer 17 of the anti Sabite-loop 15, the synthetic resin of the peeling tape 18 is being adhered, after releasing the release tape 18 from the adhesive layer 17, bonded to proof Sabite-loop 15 To wear.

[0011] After execution of the tape attaching step, as shown in FIG. 5, a plurality of tubing 10 that anti Sabite-loop 15 is attached groove surface 11 and its vicinity sites along the pipeline P laid, then the separation step, anti Sabite-loop 15
Is peeled off from the groove surface 11 and the vicinity thereof, and welding of the groove surface 11 is performed as shown in FIG.

According to rust technology of the welding GMA surfaces described, polished groove surface 11 and the portion close from wiping with a solvent, for affixing the proof Sabite-loop 15, the groove surface 11
In in a state where rust is not generated, the open crest 11 with adhesive layer 17 of the anti Sabite-loop 15 can be protected in an airtight manner. Then, before performing the welding groove surface 11, when peeling off the anti Sabite-loop 15 and groove surface 11 from the vicinity of the site, the groove surface 11
Is peeled off without any residue, so that the mirror-shaped groove surface 11 in the polished state can be reproduced and welded.

[0013] In addition, the tape base of anti-Sabite-loop 15 material 16
And the adhesive layer 17 are stretchable, so that the tubular material 1 is not flat.
From 0 of the groove surface 11 and can be easily adhered in the vicinity site, to enable easy peeling of the anti Sabite-loop 15, anti Sabite-loop 15 is also less expensive because, rust The cost for this is significantly lower. For example, FIG. 7 shows a case in which the rust prevention technology of the welding groove surface is applied to the welding groove surface 21 at the end of the steel plate 20, and in the tape attaching process, the welding groove surface 21 and its vicinity are shown. the anti Sabite-loop 15 at the site, the adhesive layer 17
Are attached in such a manner that they are in close contact with the groove surface 21 and the vicinity thereof. That is, an anti Sabite-loop 15 tubing 10 is not limited to the groove surface 11 and 21 formed at the end of the steel plate 20,
It can be easily adhered to grooved surfaces of various shapes .

[0014] In the above embodiments, anti Sabite-loop 15
The tape base 16 and the adhesive layer 17 are not limited to the ethylene propylene rubber and the butyl rubber compound. As the synthetic rubber tape base 16, an elastic tape base can be used. As 17, an adhesive layer that does not leave any foreign matter on the groove surface 11 when peeled off can be applied.

[0015]

According to the first aspect of the present invention, there is provided a rust-preventive tape for welding groove, comprising: a tape base made of a synthetic resin; a synthetic rubber adhesive layer formed on one surface of the tape base; since a release tape which is peelably to the surface of the layer, groove surface an adhesive layer by peeling off the exfoliation tape and near
By a simple work of sticking to the part in close contact with the part, it can be efficiently attached to the groove surface, and at the time of welding, the tape base and the adhesive layer are integrally peeled off Peeling can be performed efficiently. The grooved surface is protected by a synthetic rubber adhesive layer to reliably prevent rust, and when peeled off, a clean grooved surface appears .

[Brief description of the drawings]

FIG. 1 is a process diagram of a method for preventing rust on a groove for welding according to an embodiment of the present invention.

2 is a perspective view of the vibration Sabite-loop the groove surface and the adhesive was tubing in proximity site.

FIG. 3 is a sectional view taken along line III-III of FIG. 2;

FIG. 4 is a cross-sectional view of the anti-Sabite-loop.

FIG. 5 is a cross-sectional view of a plurality of pipes laid along a pipeline.

FIG. 6 is a cross-sectional view of a plurality of welded pipe members.

7 is a perspective view of the steel sheet sticking the anti Sabite-loop to the neighboring portion and the groove surface.

[Explanation of symbols]

10 tubing 11 groove surface 15 anti Sabite-loop 16 tape base 1 7 tacky adhesive layer 18 release tape 20 steel 21 groove surface

Claims (1)

(57) [Claims] 1. A welding groove rust-preventive tape for attaching to a groove surface of a steel member to prevent rust, comprising: a synthetic rubber tape base material; and a tape base material formed on one surface of the tape base material. A rust preventive tape for welding, comprising: an adhesive layer made of synthetic rubber thus obtained; and a release tape removably attached to the surface of the adhesive layer.