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JP2004301210A - Construction method of heat insulation and cooling structure for piping and thermal insulation for piping - Google Patents

Construction method of heat insulation and cooling structure for piping and thermal insulation for piping Download PDF

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Publication number
JP2004301210A
JP2004301210A JP2003093815A JP2003093815A JP2004301210A JP 2004301210 A JP2004301210 A JP 2004301210A JP 2003093815 A JP2003093815 A JP 2003093815A JP 2003093815 A JP2003093815 A JP 2003093815A JP 2004301210 A JP2004301210 A JP 2004301210A
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JP
Japan
Prior art keywords
pipe
tape
binding
piping
heat insulating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2003093815A
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Japanese (ja)
Inventor
Noriyuki Katsuyoshi
憲幸 勝吉
Takanosuke Katou
孝之介 加藤
Yasunori Hattori
泰紀 服部
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Nichias Corp
Original Assignee
Nichias Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Priority to JP2003093815A priority Critical patent/JP2004301210A/en
Publication of JP2004301210A publication Critical patent/JP2004301210A/en
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Abstract

【課題】優れた施工性と低温配管の運転時における断熱材の緊縛材のゆるみによる保冷材(パイプカバー)の固定機能の喪失を防止することを課題とする。
【解決手段】パイプ101のパイプカバー102,103は仮留めの後、フィラメントテープ105によりパイプ101の円周方向に沿って巻き付けて接着し緊縛する。
【選択図】 図1
An object of the present invention is to provide excellent workability and prevent loss of a function of fixing a cold insulator (pipe cover) due to loosening of a binding material of a heat insulating material during operation of a low-temperature pipe.
After temporarily fixing pipe covers (102, 103) of a pipe (101), the pipe covers (102) are wound along a circumferential direction of the pipe (101) by a filament tape (105), adhered, and bound.
[Selection diagram] Fig. 1

Description

【0001】
【発明の属する技術分野】
本発明は流体等を輸送する配管の保温、保冷施工において、断熱材としてのパイプカバーを配管に固定する方法に係り、特に配管の保温保冷構造体並びに配管用断熱材の施工方法の改良に関する。
【0002】
【従来の技術】
プラント等の配管の保温・保冷施工は、通常、円筒を円周方向に2つ割、あるいはそれ以上の数に分割したパイプカバー状に加工した保温・保冷材(パイプカバー)を配管に取り付け、緊縛、固定する方法が広く行われている。
パイプカバーを配管に緊縛するには特許文献1又は2に記載のようにスチールバンド(帯鋼)あるいは針金からなる緊縛材を使用する方法が一般的である。
【0003】
【特許文献1】
特開平10−299983号公報
【特許文献2】
実開平6−40593号公報
【0004】
【発明が解決しようとする課題】
パイプカバーの緊縛材は金属製で数10〜数100mの長さが巻き取られた状態で供給される。そのため、重量が重く、狭く高所の足場上での取り回しは容易ではなく、また緊縛するための締付け工具や締付け金具、切断用工具が必要で、施工に手間がかかっていた。
【0005】
また、保冷施工の場合においては、例えば配管に低温流体が流されると、パイプカバーが冷却され、パイプカバーは収縮する。このとき、緊縛用のスチールバンドや針金はパイプカバーに接着固定されておらず、パイプカバーの収縮に追従しない。すなわち、スチールバンドや針金の外周よりも、パイプカバーの外周が小さくなってしまう。その結果、スチールバンドや針金は外観上ゆるんだ格好になり、パイプカバーを固定する機能を果たせなくなってしまう。一般的に、直径の比較的大きい配管であれば、配管の管軸方向に沿った目地部には、ウレタン樹脂などの発泡体が注入され、断熱材同士を接着しているのであまり支障はないが、例えば、10cm(4インチ)以下といった比較的直径の小さい配管へ断熱材を施工する場合、配管の管軸方向に沿った目地部には、発泡体を注入しない。したがって、上述したように緊縛材がパイプカバーを固定する機能を果たせなくなってしまうと、目地部において配管が露出してしまい、配管に多量の霜や氷の付着し保冷機能が損なわれることが懸念される。
【0006】
さらに、スチールバンド(帯鋼)を使用する場合、バンドの長手方向に沿った端部が鋭利になっているのでケガをする危険性もあった。
【0007】
本発明は、これらの問題点に鑑みてなされたものであり、優れた施工性と低温配管の運転時における緊縛材のゆるみによる断熱材固定機能の喪失を防止しかつ安価な配管の保温保冷構造体及び配管用断熱材の施工方法を提供することを目的とする。
【0008】
【課題を解決するための手段】
上記目的を達成するため、本発明の配管の保温保冷構造体は、配管の外周面を被覆する断熱材と、該配管の円周方向に沿って該断熱材の表面に巻かれ、少なくとも片面が粘着性を有する緊縛用テープと、を備えることを要旨とする。
【0009】
上記本発明の保温保冷構造体において、前記緊縛用テープが伸び率10%以下の繊維強化樹脂テープ、又は前記緊縛用テープがポリエステルまたはポリプロピレンフィルムをガラス繊維で補強したフィラメントテープとしてもよい。
【0010】
また本発明の配管用断熱材の施工方法は、配管の外周面を断熱材で被覆する工程と、該断熱材の表面に少なくとも片面が粘着性を有する緊縛用テープを該配管の円周方向に沿って巻き付ける工程と、を備えたことを要旨とする。
【0011】
上記本発明の施工方法において、前記緊縛用テープが伸び率10%以下の繊維強化樹脂テープ、又は前記緊縛用テープがポリエステルまたはポリプロピレンフィルムをガラス繊維で補強したフィラメントテープであるとしてもよい。
【0012】
【発明の実施の形態】
本発明においては、前記問題点の解決を鋭意検討した結果、パイプカバーの緊縛にスチールバンドと同様に伸縮せず、かつ張力があるテープで、片面に粘着剤を設けたテープ状の緊縛材を使用することにより上記の問題点が解消されることが見いだされた。
【0013】
パイプカバーの緊縛材に第1に求められる性能としては伸びが十分小さく、パイプカバーを配管に締め込む際の張力に耐えられることである。
パイプカバーを配管に固定するだけであれば、布あるいはプラスチックフィルムを基材とする粘着テープを使用することにより、十分に固定の用をなすが、保温・保冷においては配管内への熱の出入りを最小に抑えるためにパイプカバー同士の継ぎ目に隙間ができないように緊縛材に張力をかけてパイプカバーを締め込む必要がある。
【0014】
また、パイプカバーを緊縛するには伸びが大きい材料ではパイプカバーを配管に取り付けてから締め込むことが困難であるため、緊縛材の伸びが小さいことが重要な要件となる。
【0015】
これらの要件を満たす緊縛用テープとしての粘着テープ材を種々検討した結果、プラスチックフィルムに繊維を積層し補強したフィラメントテープと呼称される粘着テープのうちで補強材にガラス繊維を用いたもので、好適には伸び率10%以下のものが最適であることがわかった。
【0016】
プラスチックフィルムにガラス繊維を積層し補強したフィラメントテープは軽量で1巻の大きさも小さく取り扱いが容易であると同時に、カッターナイフのみで簡単に切断できるため特殊な工具も不要である。
【0017】
また、パイプカバーにフィラメントテープが粘着剤で固定されるため、保冷の場合にはプラントの運転時にパイプカバーが冷却により収縮してもテープがこれに追従するのでパイプカバーの緊縛、固定効果がなくなることがない。
【0018】
フィラメントテープを使用した保温・保冷施工の方法としては、パイプカバーを配管の回りに仮留めした状態で緊縛用ベルト(ラッシングベルトなど)を用いてパイプカバーの長手目地同士が十分に密着するまでパイプカバーを締め込んだ後、パイプカバーの周りにフィラメントテープを1周以上きつく巻き付けパイプカバーに貼り付けることにより行われる。
【0019】
この後、緊縛用ベルトを取り外してもフィラメントテープの粘着力と張力によりパイプカバーは締め込まれた状態が維持される。特に、配管の管軸方向に沿った目地部に発泡体を注入しない比較的直径の小さい(通常は100cm以下、より小さくて50cm以下、さらに小さくて25cm以下)配管へ断熱材を施工する場合においては、上述した状態は好ましい。
【0020】
【実施例】
以下、本発明を具体的実施例により説明するが、本発明はこれらの実施例に限定されるものではない。
本発明の実施例を図1に示す。同図において、直径25.4cm(10インチ)のステンレス鋼管(パイプ)101、のまわりに厚さ120mm、2つ割の硬質ウレタンフォーム製パイプカバー102,103を仮留めの布製のラッシングベルト(図示せず)を用いてパイプカバーの長手方向の目地部104に隙間が空かないように十分に締め込んで仮留めした後、緊縛材としてガラス繊維で補強されたフィラメントテープ(日東電工(株)製、伸び8%)105をパイプカバー102,103の長手方向4ヶ所に1周以上巻き付け、その継ぎ目の貼り重ね部分106ができるようにして、パイプカバー102,103とテープ105を固定した。フィラメントテープを巻き付けるには、テープの切断時にカッターナイフを用いた以外には特に工具を必要としなかった。この状態でラッシングベルトを取り除き、フィラメントテープのみで緊縛された状態としたがパイプカバーの長手目地は開くことがなく、しっかりと配管に固定されていた。これを試験体Aとした。
【0021】
また、比較例1として図1において、10Bステンレス鋼管101のまわりに厚さ120mm、2つ割の硬質ウレタンフォーム製パイプカバー102,103を仮留めし、緊縛材としてステンレススチールバンド(幅15mm、厚さ0.3mm)を使用してパイプカバーを締め込んだ。締め込み作業にはスチールバンド専用の緊縛用工具、およびスチールバンド同士を接合するための専用金具を使用した。スチールバンドで緊縛されたパイプカバーは長手目地同士の間に隙間が生じることなくしっかりと配管に固定された。これを試験体Bとした。ここで、試験体Bを施工するのに要した時間は、試験体Aを施工するのに要した時間の約3倍であった。
【0022】
上記の試験体A及びBの配管の開放部を硬質ウレタンフォーム板で塞ぎ、各々の試験体の配管内に液体窒素を供給して配管内部温度を液化天然ガスの温度−162℃になるまで冷却した。
【0023】
パイプカバー各部の温度が定常になった時点で試験体の外観を観察したところ、試験体Aではパイプカバーの長手目地はしっかりと密着し隙間は生じておらず、また緊縛したフィラメントテープはパイプカバー表面から剥がれることなくパイプカバーを固定した状態を維持していた。一方、試験体Bでは緊縛材のスチールバンドがゆるみパイプカバーが脱落しやすい状態となっていることが確認された。
【0024】
【発明の効果】
以上説明したように本発明によれば、配管の保冷又は保温工事において断熱材のパイプカバーへの緊縛手段としてフィラメントテープを使用することにより作業性が向上するとともに、パイプカバーの固定機能が向上しその信頼性が高く、しかも施工費用が安価となる等の効果が得られる。
【図面の簡単な説明】
【図1】本発明の実施例における保温・保冷施工方法におけるパイプカバーの固定方法を模式的に示す説明図である。
【符号の説明】
101 配管(パイプ)
102 保冷材(パイプカバー)
103 保冷材(パイプカバー)
104 目地部
105 フィラメントテープ
106 フィラメントテープの継ぎ目の貼り重ね部分
[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of fixing a pipe cover as a heat insulating material to a pipe in heat preservation and cold preservation work of a pipe for transporting a fluid or the like, and more particularly to an improvement in a heat preserving and cooling structure for a pipe and a method of applying a heat insulating material for a pipe.
[0002]
[Prior art]
Heat insulation / cooling construction of pipes of plants, etc. is usually performed by attaching a heat insulation / cooling material (pipe cover), which is formed by dividing a cylinder into two parts in the circumferential direction or by dividing it into more pipe covers. Bonding and fixing methods are widely used.
In order to bind the pipe cover to the pipe, a method using a binding member made of a steel band (strip steel) or a wire as described in Patent Document 1 or 2 is generally used.
[0003]
[Patent Document 1]
JP-A-10-299983 [Patent Document 2]
Japanese Utility Model Laid-Open No. 6-40593
[Problems to be solved by the invention]
The binding material of the pipe cover is made of metal, and is supplied in a state where a length of several tens to several hundreds of meters is wound. Therefore, it is heavy and narrow, and it is not easy to manage on a scaffold at a high place. In addition, a tightening tool, a fastener, and a cutting tool for tightening are required, and the construction is troublesome.
[0005]
In the case of cold insulation, for example, when a low-temperature fluid flows through the pipe, the pipe cover is cooled and the pipe cover shrinks. At this time, the steel band or wire for binding is not adhesively fixed to the pipe cover, and does not follow contraction of the pipe cover. That is, the outer circumference of the pipe cover becomes smaller than the outer circumference of the steel band or the wire. As a result, the steel band and the wire have a loose appearance and cannot function to fix the pipe cover. In general, if the pipe has a relatively large diameter, a foam such as urethane resin is injected into joints along the pipe axis direction of the pipe, and the heat insulating materials are bonded to each other, so there is not much trouble. However, in the case where a heat insulating material is applied to a pipe having a relatively small diameter such as 10 cm (4 inches) or less, the foam is not injected into joints along the pipe axis direction of the pipe. Therefore, if the binding material cannot perform the function of fixing the pipe cover as described above, the pipe is exposed at the joint, and there is a concern that a large amount of frost and ice adhere to the pipe and the cooling function is impaired. Is done.
[0006]
Furthermore, when a steel band (strip) is used, there is a risk of injury due to the sharp end of the band along the longitudinal direction.
[0007]
The present invention has been made in view of these problems, has excellent workability and prevents loss of a heat insulating material fixing function due to loosening of a binding material during operation of a low-temperature pipe, and is an inexpensive heat insulating and cooling structure for a pipe. An object of the present invention is to provide a construction method of a heat insulating material for a body and a pipe.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a heat insulating / cooling structure for a pipe of the present invention is provided with a heat insulating material covering an outer peripheral surface of the pipe, and wound around the surface of the heat insulating material along a circumferential direction of the pipe, and at least one surface is wound. And an adhesive binding tape.
[0009]
In the heat-retaining structure of the present invention, the binding tape may be a fiber-reinforced resin tape having an elongation of 10% or less, or the binding tape may be a filament tape obtained by reinforcing a polyester or polypropylene film with glass fibers.
[0010]
In addition, the method for applying a heat insulating material for a pipe according to the present invention includes a step of coating an outer peripheral surface of the pipe with a heat insulating material, and applying a binding tape having at least one surface having adhesiveness to the surface of the heat insulating material in a circumferential direction of the pipe. And a step of winding along.
[0011]
In the construction method of the present invention, the binding tape may be a fiber reinforced resin tape having an elongation of 10% or less, or the binding tape may be a filament tape in which a polyester or polypropylene film is reinforced with glass fibers.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
In the present invention, as a result of diligent examination of the solution of the above-mentioned problems, a tape-like binding material provided with an adhesive on one side is a tape that does not expand and contract like a steel band to bind the pipe cover and has a tension. It has been found that the use solves the above problems.
[0013]
The first required performance of the binding material of the pipe cover is that the elongation is sufficiently small and that it can withstand the tension when the pipe cover is tightened into the pipe.
If only the pipe cover is fixed to the pipe, use an adhesive tape based on a cloth or plastic film to secure the pipe sufficiently.However, heat retention and cooling allow heat to enter and exit the pipe. In order to minimize the gap, it is necessary to tighten the binding member by applying tension to the binding material so that no gap is formed at the joint between the pipe covers.
[0014]
Further, it is difficult to tighten the pipe cover after attaching it to the pipe with a material having a large elongation to bind the pipe cover. Therefore, it is an important requirement that the elongation of the binding material is small.
[0015]
As a result of various studies on adhesive tape materials as binding tapes satisfying these requirements, glass fiber was used as a reinforcing material in an adhesive tape called a filament tape in which fibers were laminated and reinforced on a plastic film, It has been found that those having an elongation of 10% or less are optimal.
[0016]
A filament tape reinforced by laminating glass fibers on a plastic film is lightweight, has a small size of one roll, is easy to handle, and requires no special tools because it can be easily cut only with a cutter knife.
[0017]
In addition, since the filament tape is fixed to the pipe cover with an adhesive, in the case of cooling, even if the pipe cover shrinks due to cooling during operation of the plant, the tape follows the shrinkage, so the binding and fixing effects of the pipe cover are lost. Nothing.
[0018]
As a method of heat insulation and cold insulation construction using filament tape, with a pipe cover temporarily fastened around the pipe, use a tying belt (such as a lashing belt) until the pipe joints come into close contact with the longitudinal joints of the pipe cover. After the cover is tightened, the filament tape is wound tightly around the pipe cover one or more times and attached to the pipe cover.
[0019]
Thereafter, even if the binding belt is removed, the pipe cover is maintained in a tightened state by the adhesive force and tension of the filament tape. In particular, when applying a heat insulating material to a pipe having a relatively small diameter (usually 100 cm or less, smaller than 50 cm or less, and further smaller than 25 cm or less) that does not inject foam into joints along the pipe axis direction of the pipe. The above-mentioned state is preferable.
[0020]
【Example】
Hereinafter, the present invention will be described with reference to specific examples, but the present invention is not limited to these examples.
FIG. 1 shows an embodiment of the present invention. In the figure, a cloth lashing belt made of cloth having a thickness of 120 mm and two hard urethane foam pipe covers 102 and 103 temporarily fixed around a stainless steel pipe (pipe) 101 having a diameter of 25.4 cm (10 inches) (see FIG. (Not shown), and the pipe cover is sufficiently fastened and temporarily fastened so that no gap is left in the joint portion 104 in the longitudinal direction of the pipe cover. Then, a filament tape reinforced with glass fiber as a binding material (manufactured by Nitto Denko Corporation) (Elongation: 8%) 105 was wound around the pipe covers 102 and 103 at one or more rounds at four locations in the longitudinal direction, and the pipe covers 102 and 103 and the tape 105 were fixed in such a manner that an overlapped portion 106 was formed. No special tools were required for winding the filament tape except for using a cutter knife when cutting the tape. In this state, the lashing belt was removed, and the pipe was tied up with only the filament tape. However, the longitudinal joints of the pipe cover did not open and were firmly fixed to the pipe. This was designated as specimen A.
[0021]
1, a 120 mm thick pipe cover 102, 103 made of hard urethane foam was temporarily fixed around a 10B stainless steel pipe 101 in FIG. 1 as a comparative example 1, and a stainless steel band (width 15 mm, thickness (0.3 mm) was used to tighten the pipe cover. For the tightening work, a dedicated tool for binding a steel band and a dedicated fitting for joining the steel bands were used. The pipe cover tied up with the steel band was firmly fixed to the pipe without any gap between the longitudinal joints. This was designated as specimen B. Here, the time required to construct the specimen B was about three times the time required to construct the specimen A.
[0022]
The open portions of the pipes of the test specimens A and B are closed with a hard urethane foam plate, and liquid nitrogen is supplied into the pipes of the respective test specimens, and the internal temperature of the pipes is cooled until the temperature of the liquefied natural gas reaches -162 ° C. did.
[0023]
When the temperature of each part of the pipe cover became steady, the appearance of the specimen was observed. In specimen A, the longitudinal joint of the pipe cover was firmly adhered and no gap was formed. The pipe cover was kept fixed without peeling off from the surface. On the other hand, in the specimen B, it was confirmed that the steel band of the binding material was loosened and the pipe cover was easily dropped.
[0024]
【The invention's effect】
As described above, according to the present invention, the workability is improved by using the filament tape as a means for binding the heat insulating material to the pipe cover in the cooling or heat insulating work of the pipe, and the function of fixing the pipe cover is improved. Its effects are high, such as high reliability and low construction cost.
[Brief description of the drawings]
FIG. 1 is an explanatory view schematically showing a method for fixing a pipe cover in a method for performing heat insulation and cold insulation in an embodiment of the present invention.
[Explanation of symbols]
101 Piping (pipe)
102 Cooling material (pipe cover)
103 Cooling material (pipe cover)
104 joint portion 105 filament tape 106 filament tape seam joint

Claims (6)

配管の外周面を被覆する断熱材と、該配管の円周方向に沿って該断熱材の表面に巻かれ、少なくとも片面が粘着性を有する緊縛用テープと、を備えることを特徴とする配管の保温保冷構造体。A heat insulating material covering the outer peripheral surface of the pipe, and a tape for binding, which is wound around the surface of the heat insulating material along the circumferential direction of the pipe and has at least one surface having adhesiveness, Heat insulation and cooling structure. 前記緊縛用テープが伸び率10%以下の繊維強化樹脂テープであることを特徴とする請求項1記載の配管の保温保冷構造体。2. The heat insulation / cooling structure for piping according to claim 1, wherein the binding tape is a fiber reinforced resin tape having an elongation of 10% or less. 前記緊縛用テープがポリエステルまたはポリプロピレンフィルムをガラス繊維で補強したフィラメントテープであることを特徴とする請求項1または2記載の配管の保温保冷構造体。3. The structure according to claim 1, wherein the binding tape is a filament tape obtained by reinforcing a polyester or polypropylene film with glass fibers. 配管の外周面を断熱材で被覆する工程と、該断熱材の表面に少なくとも片面が粘着性を有する緊縛用テープを該配管の円周方向に沿って巻き付ける工程と、を備えたことを特徴とする配管用断熱材の施工方法。A step of covering the outer peripheral surface of the pipe with a heat insulating material, and a step of winding a binding tape having adhesiveness on at least one surface of the heat insulating material along a circumferential direction of the pipe. Method of installing insulation for piping. 前記緊縛用テープが伸び率10%以下の繊維強化樹脂テープであることを特徴とする請求項4記載の配管用断熱材の施工方法。The method according to claim 4, wherein the binding tape is a fiber-reinforced resin tape having an elongation of 10% or less. 前記緊縛用テープがポリエステル又はポリプロピレンフィルムをガラス繊維で補強したフィラメントテープであることを特徴とする請求項4または5記載の配管用断熱材の施工方法。The method according to claim 4 or 5, wherein the binding tape is a filament tape obtained by reinforcing a polyester or polypropylene film with glass fibers.
JP2003093815A 2003-03-31 2003-03-31 Construction method of heat insulation and cooling structure for piping and thermal insulation for piping Pending JP2004301210A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005090796A1 (en) * 2004-03-24 2005-09-29 Koganei Corporation Fluid pressure cylinder
CN104455778A (en) * 2014-09-23 2015-03-25 吴汉超 Manufacturing method for five-layer stainless steel-glass fiber reinforced plastic compound heat preservation pipe with pipe joint
KR200478539Y1 (en) * 2014-12-31 2015-10-16 서빈나 tube type heat insulation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005090796A1 (en) * 2004-03-24 2005-09-29 Koganei Corporation Fluid pressure cylinder
CN104455778A (en) * 2014-09-23 2015-03-25 吴汉超 Manufacturing method for five-layer stainless steel-glass fiber reinforced plastic compound heat preservation pipe with pipe joint
KR200478539Y1 (en) * 2014-12-31 2015-10-16 서빈나 tube type heat insulation

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