JP3498230B2 - Steel tube end joint structure - Google Patents
Steel tube end joint structureInfo
- Publication number
- JP3498230B2 JP3498230B2 JP27610395A JP27610395A JP3498230B2 JP 3498230 B2 JP3498230 B2 JP 3498230B2 JP 27610395 A JP27610395 A JP 27610395A JP 27610395 A JP27610395 A JP 27610395A JP 3498230 B2 JP3498230 B2 JP 3498230B2
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- stainless steel
- sleeve
- joint structure
- cap nut
- 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.)
- Expired - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L21/00—Joints with sleeve or socket
- F16L21/02—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings
- F16L21/04—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings in which sealing rings are compressed by axially-movable members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L21/00—Joints with sleeve or socket
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Joints With Sleeves (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】この発明は、電蝕の防止を図ると
ともに、ステンレス銅管の端部分に袋ナットを用いない
低コストな鋼管端部の継手構造に関するものである。
【０００２】
【従来の技術】従来、接続管同士を固定状態としたまま
で相手方部品との接続を行う、鋼管端部の継手構造とし
て、例えば、図４に示すような端部構造のステンレス鋼
管が用いられている。
【０００３】蛇腹部１ａを有するステンレス鋼管１の一
端側は、先端に突出管部２ｂを有するフレア端部２ａを
溶接した直管部２として形成し、この直管部２に異種金
属製の袋ナット３を遊嵌自在に取り付けるべく、袋ナッ
ト３の内周に環状溝３ｂを穿設し、この環状溝３ｂに止
め線４を挿嵌し止め線４をフレア端部２ａに当接させて
袋ナット３の抜け止めを行う。
【０００４】そして、袋ナット３のネジ部３ａに対し、
別部品として準備したニップル５の中央つば部５ａの片
側に設けられているネジ部５ｂを螺合し、かつニップル
５の他側に設けられているネジ部５ｃを相手方部品にお
ける袋ナット６のネジ部６ａに螺合させる。
【０００５】しかしながら、このような銅管端部の継手
構造でば、ステンレス鋼管１側に取り付ける袋ナット
３、別部品として準備されるニップル５、相手方部品に
おける袋ナット６などを必要とする構造であり、部品点
数の多い接続構造となる。
【０００６】また、袋ナットの抜け止めを図るために、
ステンレス鋼管１の一端側はフレア端部２ａを溶接した
直管部２としなければならない。しかも、袋ナット３と
ステンレス鋼管１との間においては電蝕が発生し、電蝕
劣化による耐久性に問題を生ずるため、近年は、図５に
示すような改良された鋼管端部の継手構造が多く採用さ
れてきている。
【０００７】すなわち、突出管部２ｂに絶縁リング７を
被嵌させるとともに、袋ナット３の内周側にも絶縁スリ
ーブ８を挿嵌させるようにし、袋ナット３とステンレス
鋼管１との間における電蝕の防止を図り、ステンレス鋼
管１の耐久性の向上を図るようにしている。
【０００８】
【発明が解決しようとする課題】ところで、このような
改良された鋼管端部の継手構造では、電蝕の防止を図る
ことはできるが、従来と同様に袋ナット３、別部品とし
て準備されるニップル５、相手方部品における袋ナット
６などを必要とするとともに、袋ナットの抜け止めを図
るためにステンレス鋼管１の一端側にフレア端部２ａを
溶接した直管部２としなければならない。さらに、絶縁
リング７や絶縁スリーブ８なども必要となり一層コスト
高な鋼管端部の継手構造となる。
【０００９】また、このような鋼管端部の継手構造で
は、多数の部品を組合わせる作業が必要であり、それら
の作業にも手間を要するなどの問題がある。
【００１０】この発明は、このような事情に基づいてな
されたものであり、電蝕防止を容易に図るとともに、ス
テンレス鋼管の端部分に袋ナットを用いず、部品点数の
減少を図った低コストな銅管端部の継手構造の提供を目
的とする。
【００１１】
【課題を解決するための手段】この発明は、上記のよう
な目的を達成するために、ステンレス鋼管の一端側に形
成される直管部と、上記直管部の端部分の外周に樹脂成
形により一体的に固着されるとともに、外周面にＯリン
グの挿嵌用環状溝を穿設し、かつ後部に小径段部を形成
し摩擦係数を小とする滑り外周面を有する絶縁性のスリ
ーブと、中央つば部の一方側の外周面に相手部品と螺合
するネジ部を設け、中央つば部の他方側の内周は一方側
の内周の径よりも大径とし、この大径部内に挿嵌された
上記スリーブに対して回転可能とされ、かつスリーブの
小径段部内において内周に穿設された環状溝に挿嵌され
る止め線により抜け止め防止が図られる片ニップルとよ
りなることを特徴とする。
【００１２】
【作用】この発明によれば、ステンレス綱管における直
管部の端部分には、滑り外周面を有する絶縁性のスリー
ブを樹脂成形により一体的に装着するとともに、直管部
に装着されているスリーブに片ニップルが回転可能に取
り付けられる構成とされているので、片ニップルとステ
ンレス鋼管との間の電蝕の防止を図り、かつステンレス
鋼管の端部分には袋ナットを用いず、部品点数の減少を
図った構造として相手方部品との接続を行う。
【００１３】
【実施例】以下、この発明の実施例を図面に基づき詳細
に説明する。図１は、この発明に係る鋼管端部の継手構
造を示す説明用断面図である。
【００１４】図１に示すように、蛇腹部１０ａを有する
ステンレス鋼管１０の一端側は、直管部１１として形成
されている。そしてこの直管部１１には端面を揃えるよ
うにして、塩化ビニールなど絶縁性を有するとともに、
摩擦係数を小とし後述するニップル１６に対する滑り外
周面を有するスリーブ１２が一体的に固着される。
【００１５】この絶縁性のスリーブ１２は、樹脂成形に
より直管部１１に一体的に固着成形されるものであり、
したがって図示は省略するが、直管部１１の周方向に複
数条の溝（例えば、切削傷など）を形成し、この溝内に
樹脂成形時の溶融樹脂を固着させ、強固に一体化させて
もよい。
【００１６】また、スリーブ１２の外周面には、Ｏリン
グ１３を挿嵌する２本の環状溝１４，１４が穿設される
とともに、ステンレス銅管１０側となる後部には小径段
部１５が形成されている。
【００１７】このスリーブ１２に被嵌される継手は、中
央つば部１６ａの一方側の外周面に相手部品２０のネジ
部２０ａと螺合するネジ部１６ｂが設けられ、また、中
央つば部１６ａの他方側は平滑部１６ｃとする片ニップ
ル１６として形成されている。この平滑部１６ｃ内に
は、ステンレス鋼管１０の一端側の直管部１１とその外
周面に固着されたスリーブ１２が挿嵌される。
【００１８】スリーブ１２の小径段部１５内に臨む平滑
部１６ｃの内周には環状溝１７が穿設されており、この
環状溝１７に挿嵌される止め線１８がスリーブ１２に当
接することにより、片ニップル１６の抜け止め防止が図
られる。
【００１９】このように、この実施例によれば、ステン
レス鋼管１０における直管部１１の端部分には、滑り外
周面を有する絶縁性のスリーブ１２を一体的に装着さ
せ、抜け止めされたスリーブ１２に片ニップル１６を回
転可能に取り付ける構成とされているので、ステンレス
銅管１０を固定状態とし、ステンレス鋼管１０に取り付
けられている片ニップル１８を相手方部品２０に螺合さ
せればよい。
【００２０】したがって、図５に示す従来の接続構造の
ように、ステンレス鋼管１における直管部２の端部分に
取り付けられる袋ナット３、この袋ナット３と相手方部
品における袋ナット６とを互いに接続するために別部品
として準備されるニップル５、突出管部２ｂに被嵌させ
る絶縁リング７、袋ナット３の内周側に挿嵌される絶縁
スリーブ８などを必要とするような接続構造とせず、少
ない部品点数の鋼管端部の継手構造とし、かつステンレ
ス鋼管１０に対する電蝕の防止を図ることができる。
【００２１】また、ステンレス鋼管１０における直管部
１１の端部分には、滑り外周面を有する絶縁性のスリー
ブ１２を樹脂成形により一体的に装着させるように構成
されるので、その取り付け構造を簡略化することがで
き、作製時の手間を軽減化することができる。
【００２２】さらに、従来のように袋ナット３の抜け止
めを図るために、ステンレス鋼管１の一端側にフレア端
部２ａを溶接した直管部２を形成する必要はなく、ステ
ンレス銅管１０の一端側における直管部１１をそのまま
活用することができるので、製造コストを低減化でき
る。
【００２３】また、接続される管体同士は固定状態とし
たまま片ニップル１８を回転させるだけで容易に管体同
士を接続することができ、現場作業においても手間がか
からず、かつ作製時の手間も軽減することができるの
で、低コストな銅管端部の継手構造とすることができ
る。
【００２４】次に、図２は第２の実施例を示すもので、
直管部１１の端部にフランジ部１１ａを形成し、このフ
ランジ部１１ａにより成形されたスリーブ１２の抜け止
め防止を強固に図るものである。
【００２５】また、図３は第３の実施例を示すもので、
直管部１１に予め若干の膨出部１１ｂを形成しておき、
この直管部１１に対してスリーブ１２の樹脂成形を行
い、膨出部１１ｂにより成形されたスリーブ１２の抜け
止め防止を強固に図るものである。
【００２６】さらに、図４は第４の実施例を示すもの
で、直管部１１の端部分側に段部１１ｃを介した拡管部
分を形成し、かつこの拡管部分に膨出部１１ｂを形成
し、段部１１ｃを含む拡管部分がスリーブ１２中に埋設
されるように樹脂成形を行い、これにより成形されたス
リーブ１２の抜け止め防止を強固に図るものである。
【００２７】
【発明の効果】以上説明したように、この発明によれ
ば、電蝕防止を容易に図るとともに、ステンレス鋼管の
端部分に袋ナットを用いず、部品点数の減少を図った低
コストな鋼管端部の継手構造を提供することができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention aims to prevent electrolytic corrosion and to provide a low-cost steel pipe end joint structure that does not use a cap nut at the end of a stainless steel copper pipe. It is about. 2. Description of the Related Art Conventionally, a stainless steel pipe having an end structure as shown in FIG. 4 has been used as a joint structure at an end of a steel pipe for connecting with a counterpart while the connecting pipes are fixed. Is used. [0003] One end of a stainless steel tube 1 having a bellows portion 1a is formed as a straight tube portion 2 with a flared end 2a having a protruding tube portion 2b at the end welded thereto. An annular groove 3b is formed in the inner periphery of the cap nut 3 so that the nut 3 can be freely fitted. A stop wire 4 is inserted into the annular groove 3b, and the stop line 4 is brought into contact with the flared end 2a. The cap nut 3 is retained. [0004] With respect to the screw portion 3a of the cap nut 3,
A screw portion 5b provided on one side of a central flange portion 5a of a nipple 5 prepared as a separate component is screwed, and a screw portion 5c provided on the other side of the nipple 5 is screwed into a cap nut 6 of a mating component. Screw it to the part 6a. However, such a joint structure at the end of the copper pipe requires a cap nut 3 to be attached to the stainless steel pipe 1, a nipple 5 prepared as a separate part, and a cap nut 6 of a mating part. The connection structure has a large number of parts. In order to prevent the cap nut from coming off,
One end of the stainless steel pipe 1 must be a straight pipe section 2 to which a flared end 2a is welded. In addition, since electrolytic corrosion occurs between the cap nut 3 and the stainless steel pipe 1 and a problem arises in durability due to deterioration of the electrolytic corrosion, in recent years, an improved joint structure of a steel pipe end portion as shown in FIG. Has been widely adopted. That is, the insulating ring 7 is fitted on the protruding tube portion 2b, and the insulating sleeve 8 is also fitted on the inner peripheral side of the cap nut 3, so that the electrical connection between the cap nut 3 and the stainless steel pipe 1 is made. In order to prevent corrosion, the durability of the stainless steel pipe 1 is improved. By the way, in such an improved joint structure of the end portion of the steel pipe, it is possible to prevent the electrolytic corrosion, but as in the conventional case, the cap nut 3 and the separate component are used. The nipple 5 to be prepared, the cap nut 6 of the counterpart part, etc. are required, and the straight pipe part 2 in which the flared end 2a is welded to one end of the stainless steel pipe 1 to prevent the cap nut from coming off must be used. . Further, an insulating ring 7 and an insulating sleeve 8 are required, so that the joint structure at the end of the steel pipe is more expensive. In addition, such a joint structure at the end of a steel pipe has a problem that work for assembling a large number of parts is required, and such work is troublesome. [0010] The present invention has been made in view of such circumstances, and it is intended to easily prevent electric corrosion and to reduce the number of parts without using a cap nut at the end of a stainless steel pipe. It is an object of the present invention to provide a simple copper pipe end joint structure. [0011] In order to achieve the above object, the present invention provides a straight pipe formed at one end of a stainless steel pipe and an outer periphery of an end of the straight pipe. Insulation with an outer peripheral surface that is integrally fixed by resin molding, has an O-ring insertion annular groove on the outer peripheral surface, and has a small diameter step at the rear to reduce the coefficient of friction. And a threaded portion to be screwed with a mating component is provided on the outer peripheral surface on one side of the center flange portion, and the inner periphery on the other side of the central flange portion is made larger in diameter than the inner periphery on one side. A single nipple that is rotatable with respect to the sleeve inserted into the diameter portion, and is prevented from coming off by a stop line inserted into an annular groove formed in the inner periphery in the small diameter step portion of the sleeve; It is characterized by comprising. According to the present invention, an insulating sleeve having a sliding outer peripheral surface is integrally attached to the end of the straight pipe portion of the stainless steel rope tube by resin molding, and is attached to the straight pipe portion. Since the one nipple is configured to be rotatably attached to the sleeve that is being used, it aims to prevent electrolytic corrosion between the one nipple and the stainless steel pipe, and does not use a cap nut at the end of the stainless steel pipe, Connection with the counterpart is made as a structure that reduces the number of parts. Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory sectional view showing a joint structure of a steel pipe end according to the present invention. As shown in FIG. 1, one end of a stainless steel tube 10 having a bellows portion 10a is formed as a straight tube portion 11. The straight pipe section 11 has an insulating surface such as vinyl chloride so that the end faces are aligned.
The sleeve 12 having a small friction coefficient and having a sliding outer peripheral surface with respect to a nipple 16 described later is integrally fixed. The insulating sleeve 12 is integrally fixed to the straight pipe portion 11 by resin molding.
Therefore, although illustration is omitted, a plurality of grooves (for example, cuts and the like) are formed in the circumferential direction of the straight pipe portion 11, and the molten resin at the time of resin molding is fixed in the grooves and firmly integrated. Is also good. On the outer peripheral surface of the sleeve 12, two annular grooves 14, 14 for inserting the O-ring 13 are formed, and a small-diameter stepped portion 15 is provided on the rear side on the stainless steel copper tube 10 side. Is formed. The joint fitted on the sleeve 12 is provided with a screw portion 16b which is screwed with the screw portion 20a of the mating component 20 on one outer peripheral surface of the central flange portion 16a. The other side is formed as a single nipple 16 serving as a smooth portion 16c. A straight pipe portion 11 on one end side of the stainless steel pipe 10 and a sleeve 12 fixed to the outer peripheral surface thereof are inserted into the smooth portion 16c. An annular groove 17 is formed in the inner periphery of the smooth portion 16c facing the small-diameter step portion 15 of the sleeve 12, and a stop line 18 inserted into the annular groove 17 comes into contact with the sleeve 12. Thereby, the one nipple 16 is prevented from coming off. As described above, according to this embodiment, the insulating sleeve 12 having the sliding outer peripheral surface is integrally attached to the end portion of the straight pipe portion 11 of the stainless steel pipe 10 to prevent the sleeve from slipping off. Since the single nipple 16 is configured to be rotatably attached to the pipe 12, the stainless copper pipe 10 may be fixed, and the single nipple 18 attached to the stainless steel pipe 10 may be screwed to the counterpart component 20. Therefore, as in the conventional connection structure shown in FIG. 5, the cap nut 3 attached to the end of the straight pipe portion 2 of the stainless steel pipe 1, and the cap nut 3 and the cap nut 6 of the mating part are connected to each other. The connection structure does not require a nipple 5 prepared as a separate component, an insulating ring 7 fitted on the protruding tube portion 2b, an insulating sleeve 8 inserted on the inner peripheral side of the cap nut 3, and the like. In addition, the joint structure of the end portion of the steel pipe having a small number of parts can be employed, and the corrosion of the stainless steel pipe 10 can be prevented. Further, since an insulating sleeve 12 having a sliding outer peripheral surface is integrally attached to an end portion of the straight pipe portion 11 of the stainless steel pipe 10 by resin molding, its mounting structure is simplified. It is possible to reduce the labor at the time of manufacturing. Further, in order to prevent the cap nut 3 from coming off as in the prior art, it is not necessary to form the straight pipe portion 2 with the flared end 2a welded to one end side of the stainless steel tube 1; Since the straight pipe portion 11 on one end side can be used as it is, manufacturing costs can be reduced. Further, the pipes can be easily connected only by rotating the one nipple 18 while the pipes to be connected are fixed, so that no labor is required even in the field work, and the production time is reduced. Can be reduced, so that a low-cost copper tube end joint structure can be obtained. Next, FIG. 2 shows a second embodiment.
A flange portion 11a is formed at the end of the straight pipe portion 11, and the sleeve 12 formed by the flange portion 11a is securely prevented from coming off. FIG. 3 shows a third embodiment.
A slight bulging portion 11b is formed in the straight pipe portion 11 in advance,
The resin molding of the sleeve 12 is performed on the straight pipe portion 11 so as to firmly prevent the sleeve 12 formed by the bulging portion 11b from coming off. FIG. 4 shows a fourth embodiment, in which an expanded portion is formed on the end portion side of the straight pipe portion 11 via a step portion 11c, and a bulged portion 11b is formed in the expanded portion. Then, resin molding is performed so that the expanded portion including the stepped portion 11c is embedded in the sleeve 12, thereby preventing the molded sleeve 12 from coming off firmly. As described above, according to the present invention, it is possible to easily prevent electric corrosion and to reduce the number of parts by using no cap nut at the end of the stainless steel pipe. It is possible to provide a joint structure of a steel pipe end.
【図面の簡単な説明】
【図１】この発明に係る鋼管端部の継手構造を示す説明
用断面図である。
【図２】この発明に係る第２の実施例を示す説明用断面
図である。
【図３】この発明に係る第３の実施例を示す説明用断面
図である。
【図４】この発明に係る第４の実施例を示す説明用断面
図である。
【図５】従来の鋼管端部の継手構造の１例を示す説明用
断面図である。
【図６】従来の鋼管端部の継手構造の他例を示す説明用
断面図である。
【符号の説明】
１０ ステンレス鋼管
１０ａ 蛇腹部
１１ 直管部
１２ スリーブ
１６ 片ニップル
１８ 止め線BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory sectional view showing a joint structure of a steel pipe end according to the present invention. FIG. 2 is an explanatory sectional view showing a second embodiment according to the present invention. FIG. 3 is an explanatory sectional view showing a third embodiment according to the present invention. FIG. 4 is an explanatory sectional view showing a fourth embodiment according to the present invention. FIG. 5 is an explanatory sectional view showing an example of a conventional joint structure at an end of a steel pipe. FIG. 6 is an explanatory sectional view showing another example of the conventional joint structure at the end of a steel pipe. [Description of Signs] 10 Stainless steel pipe 10a Bellows part 11 Straight pipe part 12 Sleeve 16 Single nipple 18 Stop wire
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭56−147988（ＪＰ，Ａ) 特開 平８−312875（ＪＰ，Ａ) 特開 昭57−208386（ＪＰ，Ａ) 特開 平２−154888（ＪＰ，Ａ) 実開 平７−20497（ＪＰ，Ｕ) 実開 平２−491（ＪＰ，Ｕ) 実開 平７−28286（ＪＰ，Ｕ) 実開 昭56−47986（ＪＰ，Ｕ) 実開 昭63−103085（ＪＰ，Ｕ) 実開 昭62−9068（ＪＰ，Ｕ) 実開 昭55−171787（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F16L 21/00 - 21/08 F16L 25/02 F16L 58/18 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-56-147988 (JP, A) JP-A-8-312875 (JP, A) JP-A-57-208386 (JP, A) JP-A-2- 154888 (JP, A) Japanese Utility Model 7-20497 (JP, U) Japanese Utility Model 2-491 (JP, U) Japanese Utility Model 7-28286 (JP, U) Japanese Utility Model Utility Model 56-47986 (JP, U) Japanese Utility Model Showa 63-103085 (JP, U) Japanese Utility Model Showa 62-9068 (JP, U) Japanese Utility Model Showa 55-171787 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) F16L 21/00-21/08 F16L 25/02 F16L 58/18
Claims (1)
管部と、上記直管部の端部分の外周に樹脂成形により一
体的に固着されるとともに、外周面にＯリングの挿嵌用
環状溝を穿設し、かつ後部に小径段部を形成し摩擦係数
を小とする滑り外周面を有する絶縁性のスリーブと、中
央つば部の一方側の外周面に相手部品と螺合するネジ部
を設け、中央つば部の他方側の内周は一方側の内周の径
よりも大径とし、この大径部内に挿嵌された上記スリー
ブに対して回転可能とされ、かつスリーブの小径段部内
において内周に穿設された環状溝に挿嵌される止め線に
より抜け止め防止が図られる片ニップルとよりなること
を特徴とする鋼管端部の継手構造。(1) A straight pipe formed at one end of a stainless steel pipe and an outer periphery of an end portion of the straight pipe, which are integrally fixed by resin molding to an outer periphery of the stainless steel pipe. An insulating sleeve having a sliding outer peripheral surface having a small-diameter stepped portion formed in the rear surface thereof and having a small-diameter stepped portion to reduce the friction coefficient, and an outer peripheral surface on one side of the central brim portion; A threaded part to be screwed with the mating part is provided, the inner periphery of the other side of the central brim portion is made larger in diameter than the inner periphery of one side, and is rotated with respect to the sleeve inserted into the large diameter portion. A joint structure at an end of a steel pipe, comprising a single nipple which is made possible and which is prevented from falling off by a stop wire inserted into an annular groove formed in an inner periphery in a small diameter step portion of the sleeve. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27610395A JP3498230B2 (en) | 1995-09-19 | 1995-09-19 | Steel tube end joint structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27610395A JP3498230B2 (en) | 1995-09-19 | 1995-09-19 | Steel tube end joint structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0979445A JPH0979445A (en) | 1997-03-25 |
| JP3498230B2 true JP3498230B2 (en) | 2004-02-16 |
Family
ID=17564850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27610395A Expired - Fee Related JP3498230B2 (en) | 1995-09-19 | 1995-09-19 | Steel tube end joint structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3498230B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102466108A (en) * | 2010-11-17 | 2012-05-23 | 陈墅庚 | Novel corrosion-resistant expansion piece for pipeline |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018071713A (en) * | 2016-11-01 | 2018-05-10 | Ｊｆｅ継手株式会社 | Pipe unit |
| JP2019163829A (en) * | 2018-03-20 | 2019-09-26 | 大阪瓦斯株式会社 | Joint with flexible tube |
-
1995
- 1995-09-19 JP JP27610395A patent/JP3498230B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102466108A (en) * | 2010-11-17 | 2012-05-23 | 陈墅庚 | Novel corrosion-resistant expansion piece for pipeline |
| CN102466108B (en) * | 2010-11-17 | 2014-04-23 | 陈墅庚 | Novel corrosion-resisting expansion appliance for pipelines |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0979445A (en) | 1997-03-25 |
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