JPH06137471A - Flexible fluid transporting pipe - Google Patents
Flexible fluid transporting pipeInfo
- Publication number
- JPH06137471A JPH06137471A JP31411392A JP31411392A JPH06137471A JP H06137471 A JPH06137471 A JP H06137471A JP 31411392 A JP31411392 A JP 31411392A JP 31411392 A JP31411392 A JP 31411392A JP H06137471 A JPH06137471 A JP H06137471A
- Authority
- JP
- Japan
- Prior art keywords
- steel strip
- flat steel
- reinforcing layer
- winding
- flexible fluid
- 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
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、水中に布設される可撓
性の流体輸送管に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible fluid transportation pipe laid in water.
【０００２】[0002]
【従来の技術】海底油田等から油、ガス、水等の流体を
海上の設備に輸送する可撓性の流体輸送管は、高温、高
圧の原油等の輸送に耐え、かつ３００〜５００メートル
の大水深に布設可能でその高水圧に耐え、長期間安全に
使用できることが必要であり、このため従来の可撓性流
体輸送管は、図２に示したように、最内層に、流体輸送
管の内側および外側にかかる高圧力に耐える流体流路の
中空路を形成するようにステンレス鋼帯製のインターロ
ック式螺旋中空管２０を設け、この外側に、輸送する原
油やガスを漏洩させず高温の油、ガスによる劣化に耐え
得るプラスチック製の内管２１を設け、この上に設け
る、流体輸送管の管壁にかかる高圧力によるフープ荷重
に対する第１の内側の圧力補強層２２として、内外２層
巻き層の内層側のＣ型鋼条と外層側のＣ型鋼条の互いの
凹部を向かい合わせ相互に噛み合わせて短ピッチで巻付
けた２層巻き層を形成し、この上に設ける、流体輸送管
の軸力に対する第２の外側の圧力補強層２３として、内
層側のＳ巻きの高張力平型鋼条と外層側のＺ巻きの高張
力平型鋼条を長ピッチで互いに逆方向に巻付けた２層巻
き層を形成し、この上にプラスチック外部シース２４を
被覆している。2. Description of the Related Art Flexible fluid transportation pipes for transporting fluids such as oil, gas, water, etc. from subsea oil fields to facilities on the sea endure transportation of high-temperature, high-pressure crude oil, etc. It is necessary to be able to lay in deep water, to withstand the high water pressure, and to be used safely for a long period of time. Therefore, the conventional flexible fluid transport pipe has a fluid transport pipe at the innermost layer as shown in FIG. An interlock spiral hollow tube 20 made of a stainless steel strip is provided so as to form a hollow passage of a fluid flow path that withstands a high pressure applied to the inside and outside of the pipe, and does not leak crude oil or gas to be transported to the outside thereof. An inner pipe 21 made of plastic that can withstand deterioration due to high temperature oil and gas is provided, and the inner inner and outer pressure reinforcing layers 22 are provided on the inner inner pipe 21 against the hoop load due to the high pressure applied to the pipe wall of the fluid transport pipe. C on the inner layer side of the two-layer winding layer A two-layer winding layer is formed by winding the steel strip and the C-shaped steel strip on the outer layer side with the recesses facing each other and meshing with each other and wound at a short pitch. As the outer pressure-reinforcing layer 23, a two-layer winding layer is formed by winding a high-strength flat steel strip of S winding on the inner layer side and a high-strength flat steel strip of Z winding on the outer layer side at long pitches in opposite directions. A plastic outer sheath 24 is coated on this.
【０００３】[0003]
【発明が解決しようとする課題】前記の可撓性流体輸送
管が長尺になると自重が増大し大なる張力がかかるので
軽量化する必要があり、ことに水深が７５０mmにもなる
高水深の油田等に長尺の流体輸送管が布設されるような
状況下では懸垂時の張力軽減による寿命増加のために益
々軽量化が要求されている。このため従来は、前記の長
ピッチ巻付の外側の圧力補強層２３の平型鋼条の加工度
を上げることにより強度を低下することなく薄くして軽
量化し、かつ、この巻付ける平型鋼条と隣接平型鋼条と
の間の隙間を５％に抑えて、該隙間が管を曲げても一方
に偏らず、全周にわたり均一となるようにし、曲げが容
易になるようにしていたが、水中重量は２０kg／ｍにも
なり懸垂使用は水深５００ｍが限界であった。When the flexible fluid transport pipe becomes long, its own weight increases and a large tension is applied, so that it is necessary to reduce the weight. In particular, at a high water depth of 750 mm, In a situation where a long fluid transportation pipe is laid in an oil field or the like, weight reduction is required more and more in order to increase the life by reducing tension when suspended. Therefore, conventionally, by increasing the workability of the flat steel strip of the pressure reinforcement layer 23 on the outer side of the long pitch winding, the flat steel strip is thinned and reduced in weight without lowering the strength, and the flat steel strip to be wound is The gap between the adjacent flat steel strips was suppressed to 5% so that the gap was not biased to one side even when the pipe was bent, and was made uniform over the entire circumference to facilitate bending. The weight was as high as 20 kg / m, and the suspension use was limited to a depth of 500 m.
【０００４】前記のように長ピッチ巻付平型鋼条２３を
軽量化のために薄くしようとすると平型鋼条の巾／厚さ
の比が４を越えて８程度にもなり、平型鋼材成形加工時
の変形量が大になって靱性を失い巻付加工時に割れが生
じて製造時の信頼性が失われていた。そこで種々実験の
結果この長ピッチ巻付平型鋼条の強度を上げるために巾
／厚さの比を４以下に抑えたところ、靱性を維持し巻付
け時の割れの発生を無くすことができた。しかしなが
ら、この巾／厚さの比を４以下とした平型鋼条を巻付け
ると、巻付け装置における平型鋼条供給ボビンの取付数
が制限されることから、巻付けられる各平型鋼条と隣接
平型鋼条との間に５％を越える隙間が発生し、このた
め、可撓性流体輸送管が巻き取られたり巻きほぐされた
りする時や布設された海中で揺れ動く時に受ける繰り返
しの曲げにより、Ｃ型鋼条圧力補強層２２上の所定位置
に巻付けられている多数の平型鋼条がＣ型鋼条圧力補強
層２２の表面上の所定位置から移動して、多数の巻付け
平型鋼条と隣接平型鋼条間の各隙間が一方に偏って拡が
り、機械的な弱点となるという問題点があった。As described above, when the flat steel strip 23 with long pitch winding is made thin to reduce its weight, the width / thickness ratio of the flat steel strip exceeds 4 to about 8 and the flat steel material is formed. The amount of deformation at the time of processing became large and the toughness was lost, and cracking occurred at the time of winding processing, and reliability at the time of manufacturing was lost. Therefore, as a result of various experiments, when the width / thickness ratio was suppressed to 4 or less in order to increase the strength of this long-pitch wound flat steel strip, toughness was maintained and cracking during winding could be eliminated. . However, when a flat steel strip having a width / thickness ratio of 4 or less is wound, the number of flat steel strip supply bobbins attached to the winding device is limited. A gap of more than 5% is generated between the flat steel strip, which causes repeated bending when the flexible fluid transport pipe is wound or unwound or shaken in the laid sea. The large number of flat steel strips wound at predetermined positions on the C-shaped steel strip pressure reinforcing layer 22 move from the predetermined positions on the surface of the C-shaped steel strip pressure reinforcing layer 22 and are adjacent to the large number of wound flat steel strips. There is a problem in that the gaps between the flat steel strips are unevenly spread to one side, which is a mechanical weak point.
【０００５】本発明は、平型鋼条長ピッチ巻回圧力補強
層の強度、靱性を低下させず、しかも巻付けられる各隣
接平型鋼条間に大なる隙間を発生させることなく、軽量
化された可撓性流体輸送管を提供することを目的とす
る。According to the present invention, the strength and toughness of the flat steel strip long pitch winding pressure reinforcing layer are not lowered, and a large gap is not generated between the adjacent flat steel strips to be wound, and the weight is reduced. An object is to provide a flexible fluid transport tube.
【０００６】[0006]
【課題を解決するための手段】前記の目的を達成するた
め本発明の可撓性流体輸送管は、鋼帯製インターロック
螺旋管１の上にプラスチック内管２を設け、その上にＣ
型鋼条短ピッチ巻回圧力補強層３を巻回し、その上に平
型鋼条長ピッチ巻回圧力補強層１０を巻回し、その上に
プラスチック外部シース１３を設けた可撓性流体輸送管
において、前記平型鋼条長ピッチ巻回圧力補強層１０
を、巾／厚さ比を４倍以下とした平型鋼条１１と非鉄材
製スペーサ条１２とを交互に配列して巻付けて形成した
ことを特徴とするものである。In order to achieve the above-mentioned object, a flexible fluid transport pipe of the present invention is provided with a plastic inner pipe 2 on a steel strip interlock spiral pipe 1, and C on the plastic inner pipe.
In a flexible fluid transport pipe in which a type steel strip short pitch winding pressure reinforcing layer 3 is wound, a flat steel strip long pitch winding pressure reinforcing layer 10 is wound on it, and a plastic outer sheath 13 is provided thereon. The flat steel strip long pitch winding pressure reinforcing layer 10
Is formed by alternately arranging and winding flat steel strips 11 and non-ferrous spacer strips 12 having a width / thickness ratio of 4 times or less.
【０００７】[0007]
【作用】プラスチック内管２は、その内側を鋼帯製イン
ターロック螺旋管１で補強されて内外の高圧力に耐える
流体流路の中空路を形成し、Ｃ型鋼条短ピッチ巻回圧力
補強層３は、内部を流れる輸送流体の高内圧によるフー
プ荷重に耐える圧力補強層を形成し、平型鋼条長ピッチ
巻回圧力補強層１０は、大水深に布設される流体輸送管
の軸力に対する補強層を形成する。The inner pipe 2 of the plastic is reinforced by the steel strip interlock spiral pipe 1 to form a hollow passage of a fluid passage which can withstand high pressures inside and outside, and a C-shaped steel strip short pitch winding pressure reinforcing layer. 3 forms a pressure-reinforcing layer that withstands the hoop load due to the high internal pressure of the transport fluid flowing inside, and the flat steel strip long-pitch winding pressure-reinforcing layer 10 reinforces the axial force of the fluid transport pipe laid at a great depth. Form the layers.
【０００８】平型鋼条長ピッチ巻回圧力補強層１０を形
成する平型鋼条１１に巾／厚さ比が４倍以下の平型鋼条
を用いることにより、平型鋼条に靱性を維持させて巻付
け時の割れの発生を防いで平型鋼条長ピッチ巻回圧力補
強層１０の強度を大にする。これにより平型鋼条が軽量
となって水中重量が大幅に低減し、かつ、軸力に対する
強度が従来よりも大となって懸垂使用可能な水深が大幅
に増大する。Flat steel strip long pitch winding By using a flat steel strip having a width / thickness ratio of 4 times or less as the flat steel strip 11 forming the pressure-reinforcing layer 10, the flat steel strip is wound while maintaining its toughness. The strength of the flat steel strip long pitch winding pressure-reinforcing layer 10 is increased by preventing the occurrence of cracks during attachment. As a result, the flat steel strip becomes light in weight, the weight in water is significantly reduced, and the strength against axial force is greater than in the past, and the depth of water that can be suspended is greatly increased.
【０００９】平型鋼条長ピッチ巻回圧力補強層１０を形
成する平型鋼条１１と交互に配列して巻付けた非鉄材製
スペーサ条１２は、可撓性流体輸送管の繰り返しの曲げ
による各高張力平型鋼条１１の正規巻付け位置から逸脱
変移を阻止し、所定位置に巻付けられた平型鋼条間の位
置を保持し、従来のような多数の高張力平型鋼条の隣接
平型鋼条間の隙間が一方に偏って拡がるのを防ぐ。また
このスペーサ条１２は非鉄材製としたことにより軽量化
される。The flat steel strip long pitch winding The non-ferrous spacer strip 12 which is alternately arranged and wound around the flat steel strip 11 forming the pressure reinforcing layer 10 is formed by repeatedly bending the flexible fluid transport pipe. The high tensile flat steel strip 11 is prevented from deviating from the regular winding position, and the position between the flat strips wound at a predetermined position is maintained, and adjacent flat strips of many conventional high tensile flat strips are held. Prevents the gap between the strips from spreading to one side. Further, the spacer strips 12 are made of a non-ferrous material, so that the weight is reduced.
【００１０】前記の非鉄材製スペーサ条１２は、ゴム・
プラスチック被覆導電金属条からなるスペーサ条を用い
れば電力・信号の伝送線や発熱線条として利用すること
ができ、ファイバを内蔵するスペーサ条を用いれば信号
伝送線として利用することもできる。The non-ferrous spacer strip 12 is made of rubber.
If a spacer strip made of a plastic-coated conductive metal strip is used, it can be used as a power / signal transmission line or a heating strip, and if a spacer strip containing a fiber is used, it can also be used as a signal transmission line.
【００１１】[0011]
【実施例】以下に本発明の実施例を可撓性流体輸送管の
１部を破断して示した図１により説明する。１は最内層
に設けたステンレス鋼帯製インターロック螺旋管であ
る。２はこのインターロック螺旋管１の上に設けたプラ
スチック内管であり、輸送する原油やガスを漏洩させず
高温の油やガスによる劣化に耐えるナイロン、高密度ポ
リエチレン、フッ素樹脂等のプラスチックを押出被覆し
て設ける。このプラスチック内管２はその内側をステン
レス鋼帯インターロック螺旋管１で補強されて内外の高
圧力に耐える流体流路の中空路を形成する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. 1 is an interlock spiral tube made of stainless steel strip provided in the innermost layer. Reference numeral 2 denotes a plastic inner pipe provided on the interlock spiral pipe 1, and extrudes plastics such as nylon, high-density polyethylene, and fluororesin that do not leak the crude oil or gas to be transported and endure deterioration by high-temperature oil or gas. It is provided by coating. This plastic inner tube 2 is reinforced on the inside by a stainless steel band interlock spiral tube 1 to form a hollow passage of a fluid flow passage that withstands high pressure inside and outside.
【００１２】３は前記のプラスチック内管２の上に設け
たＣ型鋼条短ピッチ巻回圧力補強層であり、内側のＣ型
鋼条巻回内側層４と外側のＣ型鋼条巻回外側層５の２層
からなり、内側のＣ型鋼条巻回内側層４は、Ｃ型鋼条６
の凹部７を外向きにして前記プラスチック内管２の上に
短ピッチで巻回し、外側のＣ型鋼条巻回外側層５は、Ｃ
型鋼条６の凹部７を内向きにして前記内側層４の上に短
ピッチで巻回し、この内側層４と外側層５の互に向かい
合う各凹部を噛み合わせて巻回したＣ型鋼条短ピッチ巻
回圧力補強層３により、輸送流体の高内圧によるフープ
荷重に耐える強度を有する圧力補強層を形成する。Reference numeral 3 denotes a C-shaped steel strip short-pitch winding pressure reinforcing layer provided on the plastic inner tube 2, wherein an inner C-shaped steel strip winding inner layer 4 and an outer C-shaped steel strip winding outer layer 5 are provided. The inner layer 4 of the C-shaped steel strip wound inside is a C-shaped steel strip 6
Of the C-shaped steel strip outer side layer 5 on the outer side of the C-shaped steel strip is C
C type steel strip short pitch in which the recess 7 of the shaped steel strip 6 is wound inwardly and wound on the inner layer 4 at a short pitch, and the recesses facing each other of the inner layer 4 and the outer layer 5 are meshed and wound. The wound pressure-reinforcing layer 3 forms a pressure-reinforcing layer having a strength to withstand a hoop load due to a high internal pressure of the transport fluid.
【００１３】１０は前記のＣ型鋼条短ピッチ巻回圧力補
強層３の上に設けた平型鋼条長ピッチ巻回圧力補強層で
あり、内側の平型鋼条巻回内側層８と外側の平型鋼条巻
回外側層９の２層からなり、内側層８、外側層９の各層
とも、高張力平型鋼条１１と非鉄材製スペーサ条１２と
を用いてその各１条づつを交互に並べ、内側層８はＳ巻
き方向に長ピッチで巻付け、外側層９はＺ巻き方向に長
ピッチで巻付け、この互いに逆方向に巻回した内外２層
よりなる平型鋼条長ピッチ巻回圧力補強層１０により大
水深による軸力に対する強度を有する補強層を形成す
る。Reference numeral 10 is a flat steel strip long pitch winding pressure reinforcing layer provided on the C-shaped steel strip short pitch winding pressure reinforcing layer 3, which is an inner flat steel strip winding inner layer 8 and an outer flat steel sheet winding pressure reinforcing layer. It is composed of two layers of the shape steel strip winding outer layer 9, and each of the inner layer 8 and the outer layer 9 is alternately arranged by using a high tensile flat steel strip 11 and a non-ferrous spacer strip 12. The inner layer 8 is wound at a long pitch in the S-winding direction, the outer layer 9 is wound at a long pitch in the Z-winding direction, and the flat steel strip long-pitch winding pressure consisting of two inner and outer layers wound in opposite directions is used. The reinforcing layer 10 forms a reinforcing layer having strength against the axial force due to the large water depth.
【００１４】前記の高張力平型鋼条１１は、軸力に対す
る強度を有する補強層を形成するためにステンレス鋼条
や鋼帯等を用い、その平型鋼条の巾／厚さの比を４倍以
下たとえば巾５mm、厚さ２mmとした平型鋼条を用いるも
のであり、これにより平型鋼条１１の靱性を維持して巻
付け時の割れの発生を防ぎ、平型鋼条長ピッチ巻回圧力
補強層１０の強度を大にする。The high-strength flat steel strip 11 is made of stainless steel strip or steel strip to form a reinforcing layer having strength against axial force, and the width / thickness ratio of the flat steel strip is 4 times. Below, for example, a flat steel strip having a width of 5 mm and a thickness of 2 mm is used to maintain the toughness of the flat steel strip 11 to prevent cracking during winding, and to reinforce the flat steel strip with a long pitch winding pressure. Increase the strength of layer 10.
【００１５】前記の非鉄材製スペーサ条１２は、可撓性
流体輸送管にかかる繰り返しの曲げにより、所定位置に
巻付けられている多数の各高張力平型鋼条１１が所定位
置を逸脱変移して隣接平型鋼条間の各隙間が一方に偏っ
て拡がらないように、各平型鋼条間の隣接間隔を保持す
る。このスペーサ条１２は軽量化のために非鉄材を用い
るものであり、ポリエチレンその他のプラスチックやＦ
ＲＰ等のプラスチック製平型条もしくは丸線条を用い
る。また銅、アルミニウム等の非鉄金属の平型条や丸線
条にプラスチック、ゴム等を被覆した非鉄金属製平型条
もしくは丸線条、または、アルミニウムやアルミ合金の
平型条もしくは丸線条等を用いてもよく、この場合は
銅、アルミニウム等の線条は電力・信号の伝送用または
発熱用に利用することができる。またプラスチック被覆
をした光ファイバもしくは光ファイバユニット、また
は、金属管入り光ファイバ等を用い、この光ファイバを
信号伝送に利用することができる。またこれらの各非鉄
材は単独でなく種々併用することも可能である。In the non-ferrous spacer strip 12 described above, a large number of high-strength flat steel strips 11 wound at predetermined positions deviate from the predetermined positions due to repeated bending applied to the flexible fluid transport pipe. The adjacent spacing between the flat steel strips is maintained so that the gaps between the adjacent flat steel strips do not spread evenly to one side. This spacer strip 12 is made of non-ferrous material for weight reduction, and is made of polyethylene or other plastic or F
Use flat plastic strips such as RP or round strips. In addition, non-ferrous metal flat strips or round strips made of non-ferrous metal such as copper or aluminum or non-ferrous metal strips coated with plastic or rubber, or flat strips or round strips made of aluminum or aluminum alloy. May be used, and in this case, the filaments of copper, aluminum or the like can be used for power / signal transmission or for heat generation. Further, an optical fiber or an optical fiber unit coated with plastic, an optical fiber containing a metal tube, or the like is used, and this optical fiber can be used for signal transmission. Further, each of these non-ferrous materials can be used in combination not only individually.
【００１６】１３は前記の平型鋼条長ピッチ巻回圧力補
強層１０の上に押出被覆して設けたナイロンその他のプ
ラスチック外部シースである。なお１４、１５、１６は
前記のインターロック螺旋管１とプラスチック内管２と
の間、およびＣ型鋼条短ピッチ巻回圧力補強層３と平型
鋼条長ピッチ巻回圧力補強層１０との間、および平型鋼
条長ピッチ巻回圧力補強層１０とプラスチック外部シー
ス１３との間に介在させた巻付けテープである。Reference numeral 13 denotes a nylon or other plastic outer sheath provided by extrusion coating on the flat steel strip long pitch winding pressure reinforcing layer 10. Reference numerals 14, 15 and 16 are between the interlock spiral tube 1 and the plastic inner tube 2, and between the C-shaped steel strip short pitch winding pressure reinforcing layer 3 and the flat steel strip long pitch winding pressure reinforcing layer 10. And a flat steel strip long pitch winding pressure reinforcing layer 10 and a plastic outer sheath 13 interposed between the winding tapes.
【００１７】前記のように構成した本発明の可撓性流体
輸送管は、平型鋼条長ピッチ巻回圧力補強層１０に平型
鋼条１１と非鉄材製スペーサ条１２を交互に並べて巻付
けることにより、平型鋼条の巾／厚さの比を強度、靱性
を充分に保持することができる４倍以下としても、巻付
けられた各平型鋼条の間の隙間を５％以下に抑えること
が可能となり、繰り返しの曲げによっても巻付け平型鋼
条が移動せずしたがって隙間が一方に偏って拡がるよう
なこともない。しかも軽量化することができるので従来
のものよりも水中重量を大幅に低減することができ、懸
垂使用可能な水深の限界を増加することができる。In the flexible fluid transport pipe of the present invention constructed as described above, the flat steel strips 11 and the non-ferrous spacer strips 12 are alternately arranged and wound around the flat steel strip long pitch winding pressure reinforcing layer 10. Thus, even if the width / thickness ratio of the flat steel strip is set to 4 times or less, which can sufficiently maintain strength and toughness, the gap between the wound flat steel strips can be suppressed to 5% or less. It becomes possible, and the winding flat steel strip does not move even by repeated bending, and therefore the gap does not spread unevenly to one side. Moreover, since the weight can be reduced, the underwater weight can be significantly reduced as compared with the conventional one, and the limit of the water depth that can be suspended can be increased.
【００１８】前記の構成の可撓性流体輸送管を以下の条
件で製作したところ、すなわちステンレス鋼帯製インタ
ーロック螺旋管１を内径６３．５mmに形成し、その上に
設けるプラスチック内管２を肉厚４．５mmに形成し、そ
の上に設けるＣ型鋼条短ピッチ巻回圧力補強層３の内側
層４と外側層５は平均厚さ３mm、巾１０mmの断面Ｃ型の
鋼条を巻付け角度約８８°の短ピッチで２層に巻付けて
形成し、その上に設ける平型鋼条長ピッチ巻回圧力補強
層１０の高張力平型鋼条１１は厚さ２mm、巾５mmの平型
鋼条を用い、非鉄材製スペーサ条１２は厚さ２mm、巾４
mmのポリエチレン平型スペーサ条を用い、その内側層８
は１３条の平型鋼条１１と非鉄材製平型スペーサ条１２
を１条づつ交互に並べてＳ巻き方向に巻付角度約３５°
の長ピッチで巻付け、外側層９は１４条の平型鋼条１１
と非鉄材製平型スペーサ条１２を１条づつ交互に並べて
Ｚ巻き方向に巻付角度約３５°の長ピッチで巻付け、そ
の上のプラスチック外部シースは肉厚６．２５mmのナイ
ロン外被として、管外径が１１４mmの可撓性流体輸送管
を構成したところ、その水中重量は１６．５kg／ｍであ
り、水深６００ｍまでの懸垂使用が可能であった。When the flexible fluid transport pipe having the above-mentioned structure is manufactured under the following conditions, that is, the interlock spiral pipe 1 made of stainless steel strip is formed with an inner diameter of 63.5 mm, and the plastic inner pipe 2 provided thereon is The thickness of 4.5 mm, and the inner layer 4 and outer layer 5 of the C-shaped steel strip short pitch winding pressure reinforcing layer 3 provided on it are wound with a steel strip having a C-shaped cross section with an average thickness of 3 mm and a width of 10 mm. Flat steel strip formed by winding in two layers at a short pitch of about 88 °, and the high-strength flat steel strip 11 of the long pitch winding pressure reinforcing layer 10 provided on the flat steel strip has a thickness of 2 mm and a width of 5 mm. The non-ferrous spacer strip 12 has a thickness of 2 mm and a width of 4
mm inner layer of polyethylene flat spacer strip 8
Is 13 flat steel strips 11 and non-ferrous flat spacer strips 12
Alternately arranged one by one and wrap angle about 35 ° in S winding direction
The outer layer 9 is 14 flat steel strips 11 wound with a long pitch
And non-ferrous flat spacer strips 12 are alternately arranged and wound in the Z winding direction at a long pitch of about 35 °, and the plastic outer sheath is a nylon jacket with a wall thickness of 6.25 mm. When a flexible fluid transport pipe having an outer diameter of 114 mm was constructed, the underwater weight was 16.5 kg / m, and it was possible to suspend and use it up to a water depth of 600 m.
【００１９】前記のように構成した本発明の可撓性流体
輸送管と、従来のものとを比較するために、前記の図２
に示した従来の可撓性流体輸送管の構成を、最内層のス
テンレス鋼帯製インターロック式螺旋管２０と、その上
のプラスチック内管２１と、その上の２条のＣ型鋼条を
巻付けた圧力補強層２２、およびプラスチック外部シー
ス２４の各構成を前記本発明の実施例と同一条件にし
て、インターロック式螺旋管２０を内径６３．５mmと
し、その上のプラスチック内管２１を肉厚４．５mmのナ
イロン管とし、その上の第１の圧力補強層２２は厚さ３
mm、巾１０mmのＣ型鋼条を用いて巻付け角度８８°の短
ピッチで巻付けて形成し、最外層のプラスチック外部シ
ース２４のナイロン外被は肉厚６．２５mmとし、管外径
を１１４mmとして、同一条件にて形成し、ただし、Ｃ型
鋼条巻付圧力補強層２２の上に巻付け角度３５°の長ピ
ッチで巻付ける平型鋼条の圧力補強層２３だけは、前記
の本発明のようなスペーサ条１２を用いずに厚さ２mm、
巾９mmの平型鋼条だけを用い、そのＳ巻きの内層は２６
条の平型鋼条を巻付け、Ｚ巻きの外層は２８条の平型鋼
条を巻付けた構成としたところ、この従来構成の可撓性
流体輸送管の水中重量は２０kg／ｍであり、懸垂使用は
水深５００ｍが限界であった。これに対し、前記のよう
に本発明の可撓性流体輸送管は、水中重量が１６．５kg
／ｍで２０％も低減することができ、懸垂使用可能な水
深も従来の５００ｍの限界を大幅に越えて１００ｍも増
加することができた。In order to compare the flexible fluid transport tube of the present invention constructed as described above with the conventional one, FIG.
The structure of the conventional flexible fluid transport pipe shown in Fig. 3 is obtained by winding the innermost layer stainless steel strip interlocking spiral pipe 20, the plastic inner pipe 21 thereon, and the two C-shaped steel strips thereon. The pressure-reinforcing layer 22 and the plastic outer sheath 24 are attached under the same conditions as those of the embodiment of the present invention. The thickness of the nylon pipe is 4.5 mm and the first pressure-reinforcing layer 22 is 3 mm thick.
mm, width 10 mm, C type steel strip is wound at a short pitch with a winding angle of 88 °. The outermost plastic outer sheath 24 has a nylon jacket with a wall thickness of 6.25 mm and a pipe outer diameter of 114 mm. However, only the pressure-reinforcing layer 23 of the flat steel strip which is formed under the same conditions but is wound on the C-shaped steel strip winding pressure-reinforcing layer 22 at a long pitch of a winding angle of 35 ° is the same as that of the present invention. 2mm thickness without using such spacer strip 12,
Only flat steel strip with a width of 9 mm is used, and the inner layer of the S winding is 26
When a flat steel strip of a strip is wound and the outer layer of the Z winding is a strip of 28 flat steel strips, the underwater weight of the flexible fluid transport pipe of this conventional configuration is 20 kg / m, and it is suspended. Use was limited to a water depth of 500 m. On the other hand, as described above, the flexible fluid transport pipe of the present invention has an underwater weight of 16.5 kg.
The water depth that can be suspended and used can be greatly increased by 100 m, far exceeding the conventional limit of 500 m.
【００２０】[0020]
【発明の効果】前記のように本発明は、鋼帯製インター
ロック螺旋管上のプラスチック内管とＣ型鋼条短ピッチ
巻回圧力補強層と平型鋼条長ピッチ巻回圧力補強層とプ
ラスチック外部シースとを備えた可撓性流体輸送管にお
いて、平型鋼条長ピッチ巻回圧力補強層を、巾／厚さ比
を４倍以下とした平型鋼条と非鉄材製スペーサ条により
構成したので、平型鋼条に靱性を維持させて巻付け時の
割れの発生を防いで、平型鋼条長ピッチ巻回圧力補強層
の強度を増大することができる。As described above, according to the present invention, the plastic inner tube on the steel strip interlock spiral tube, the C type steel strip short pitch winding pressure reinforcing layer, the flat steel strip long pitch winding pressure reinforcing layer and the plastic exterior In the flexible fluid transport pipe provided with the sheath, since the flat steel strip long pitch winding pressure reinforcing layer is composed of the flat steel strip having a width / thickness ratio of 4 times or less and the non-ferrous spacer strip, It is possible to maintain the toughness of the flat steel strip, prevent the occurrence of cracks during winding, and increase the strength of the flat steel strip long pitch winding pressure reinforcing layer.
【００２１】また、平型鋼条と非鉄材製スペーサ条を交
互に並べて巻付けて平型鋼条長ピッチ巻回圧力補強層を
形成したので、可撓性流体輸送管が繰り返し曲げられて
も、巻付け平型鋼条の偏りを阻止して隣接平型鋼条間の
各隙間が一方に偏って拡がるのを防ぐことができる。Further, since the flat steel strips and the non-ferrous spacer strips are alternately arranged and wound to form the flat steel strip long pitch winding pressure reinforcing layer, even if the flexible fluid transport pipe is repeatedly bent, it is wound. It is possible to prevent the unevenness of the attached flat steel strips and prevent the gaps between the adjacent flat steel strips from being biased to one side and expanding.
【００２２】さらに、平型鋼条を巾／厚さ比が４倍以下
にして軽量化するとともに、非鉄材製スペーサ条も非鉄
材製としたので一層軽量化されることになり、流体輸送
管の自重が大幅に軽減されて大水深布設が可能になる。Further, the width / thickness ratio of the flat steel strip is reduced to 4 times or less to reduce the weight, and the spacer strip made of the non-ferrous material is also made of the non-ferrous material to further reduce the weight. The self-weight is greatly reduced, enabling deep water laying.
【００２３】前記のプラスチック内管とその内側の鋼帯
製インターロック螺旋管により内外の高圧力に耐える流
体流路が形成され、Ｃ型鋼条短ピッチ巻回圧力補強層に
より高内圧によるフープ荷重に耐える圧力補強層が形成
され、平型鋼条長ピッチ巻回圧力補強層により大なる軸
力に対する補強層が形成されるので、大水深に布設する
ことが可能な可撓性流体輸送管を得ることができる。The plastic inner tube and the steel strip interlock spiral tube on the inner side of the plastic inner tube form a fluid flow path capable of withstanding high internal and external pressures, and a C-shaped steel strip short pitch winding pressure reinforcing layer prevents a hoop load due to high internal pressure. Since a pressure-reinforcing layer that withstands is formed and a reinforcing layer against a large axial force is formed by the flat steel strip long-pitch winding pressure-reinforcing layer, it is possible to obtain a flexible fluid transport pipe that can be installed in deep water. You can
【図１】本発明の１実施例の１部破断した斜視図FIG. 1 is a partially cutaway perspective view of an embodiment of the present invention.
【図２】従来例の１部破断した斜視図FIG. 2 is a partially cutaway perspective view of a conventional example.
１：鋼帯製インターロック螺旋管 ２：プラスチック内管 ３：Ｃ型鋼条短ピッチ巻回圧力補強層 １０：平型鋼条長ピッチ巻回圧力補強層 １１：平型鋼条 １２：非鉄材製スペーサ条 １３：プラスチック外部シース 1: Steel strip interlock spiral tube 2: Plastic inner tube 3: C type steel strip short pitch winding pressure reinforcement layer 10: Flat steel strip long pitch winding pressure reinforcement layer 11: Flat steel strip 12: Non-ferrous spacer strip 13: Plastic outer sheath
Claims (1)
ック内管の上にＣ型鋼条短ピッチ巻回圧力補強層を設
け、その上に平型鋼条長ピッチ巻回圧力補強層を設け、
その上にプラスチック外部シースを設けた可撓性流体輸
送管において、前記平型鋼条長ピッチ巻回圧力補強層
を、巾／厚さ比が４倍以下の平型鋼条と非鉄材製スペー
サ条とを交互に並べ巻付けて形成したことを特徴とする
可撓性流体輸送管。1. A C type steel strip short pitch winding pressure reinforcing layer is provided on a plastic inner tube on a steel strip interlock spiral tube, and a flat steel strip long pitch winding pressure reinforcing layer is provided thereon.
In a flexible fluid transportation pipe having a plastic outer sheath provided thereon, the flat steel strip long pitch winding pressure reinforcing layer includes a flat steel strip having a width / thickness ratio of 4 times or less and a non-ferrous spacer strip. A flexible fluid transport pipe, characterized in that it is formed by alternately winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31411392A JPH06137471A (en) | 1992-10-29 | 1992-10-29 | Flexible fluid transporting pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31411392A JPH06137471A (en) | 1992-10-29 | 1992-10-29 | Flexible fluid transporting pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06137471A true JPH06137471A (en) | 1994-05-17 |
Family
ID=18049405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31411392A Pending JPH06137471A (en) | 1992-10-29 | 1992-10-29 | Flexible fluid transporting pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06137471A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1989002372A1 (en) * | 1987-09-14 | 1989-03-23 | Dai Nippon Insatsu Kabushiki Kaisha | Thermal transfer sheet |
| JP2001527198A (en) * | 1997-12-19 | 2001-12-25 | ディクソン−ロチェ，キース | Hose or flexible pipe |
| JP2009036371A (en) * | 2007-06-28 | 2009-02-19 | Wellstream Internatl Ltd | Flexible body |
| JP2010533808A (en) * | 2007-07-18 | 2010-10-28 | テクニップ フランス | Apparatus for extracting material from the bottom of a body of water, and associated method |
| CN108758118A (en) * | 2018-08-13 | 2018-11-06 | 宁波欧佩亚海洋工程装备有限公司 | A kind of deep-sea flexible composite pipe |
| CN111844678A (en) * | 2020-07-31 | 2020-10-30 | 中国石油大学(华东) | Composite material non-bonded flexible pipe, preparation method and application |
-
1992
- 1992-10-29 JP JP31411392A patent/JPH06137471A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1989002372A1 (en) * | 1987-09-14 | 1989-03-23 | Dai Nippon Insatsu Kabushiki Kaisha | Thermal transfer sheet |
| JP2001527198A (en) * | 1997-12-19 | 2001-12-25 | ディクソン−ロチェ，キース | Hose or flexible pipe |
| JP2009036371A (en) * | 2007-06-28 | 2009-02-19 | Wellstream Internatl Ltd | Flexible body |
| US9079353B2 (en) | 2007-06-28 | 2015-07-14 | Ge Oil & Gas Uk Limited | Flexible pipe |
| US9090019B2 (en) | 2007-06-28 | 2015-07-28 | Ge Oil & Gas Uk Limited | Flexible pipe |
| JP2010533808A (en) * | 2007-07-18 | 2010-10-28 | テクニップ フランス | Apparatus for extracting material from the bottom of a body of water, and associated method |
| CN108758118A (en) * | 2018-08-13 | 2018-11-06 | 宁波欧佩亚海洋工程装备有限公司 | A kind of deep-sea flexible composite pipe |
| CN111844678A (en) * | 2020-07-31 | 2020-10-30 | 中国石油大学(华东) | Composite material non-bonded flexible pipe, preparation method and application |
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