JPS5934088A - Corrosion-resisting double pipe joint structure - Google Patents
Corrosion-resisting double pipe joint structureInfo
- Publication number
- JPS5934088A JPS5934088A JP57141152A JP14115282A JPS5934088A JP S5934088 A JPS5934088 A JP S5934088A JP 57141152 A JP57141152 A JP 57141152A JP 14115282 A JP14115282 A JP 14115282A JP S5934088 A JPS5934088 A JP S5934088A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- corrosion
- butt
- joint structure
- tube
- 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.)
- Granted
Links
Landscapes
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
開示技術は油井管等の腐蝕性流体輸送賃等の耐蝕二重管
のユニット管相互の連結技術の分野に属する。DETAILED DESCRIPTION OF THE INVENTION The disclosed technology belongs to the field of a technology for interconnecting unit pipes of corrosion-resistant double pipes for transporting corrosive fluids such as oil country tubular goods.
而して、この出願の発明は内管がステンレス、外管が炭
素鋼等のユニット耐蝕二重管相互が据付現場にて突合せ
溶接されている継手構造に関する発明であり、特に外管
相互の管端が突合せ溶接され、内管相互管端は該突合せ
浴接から軸方向に位相ずれを有して設けられ、更にはそ
の当接部から突合せ溶接部にかけて工業接着剤が介設さ
れている耐蝕二重管の継手構造に係る発明である。The invention of this application relates to a joint structure in which unit corrosion-resistant double tubes, such as an inner tube made of stainless steel and an outer tube made of carbon steel, are butt-welded to each other at the installation site. The ends are butt welded, the ends of the inner tube are provided with a phase shift in the axial direction from the butt bath contact, and furthermore, an industrial adhesive is interposed from the abutment part to the butt weld part. This invention relates to a joint structure for double pipes.
周知の如く、配管は各方面において、流体輸送、配索用
に広く用いられているが、現場での摺付長さはさまざま
であるにもか＼わらず、製造過程での装置の制約や輸送
段階での制限長の関係からユニット長が規格化されてお
り、したがって、現場では所定長に継手を介して連結す
る必要がある。As is well-known, piping is widely used in various fields for fluid transportation and wiring, but although the length of the piping at the site varies, there are restrictions on equipment during the manufacturing process and Unit lengths are standardized due to length restrictions during transportation, and therefore it is necessary to connect them to a predetermined length via joints at the site.
この場合の継手については施工の容易性、確実性等の利
点から突合せ溶接が多く採用されている。For joints in this case, butt welding is often adopted due to its advantages such as ease of construction and reliability.
ところで、原油等の腐蝕性流体の輸送に用いられる内管
ステンレス、外管炭素鋼等の耐蝕二重管相互の突合せ溶
接については第１．２図に示す様にユニット管１、ｌに
ついての開先管端の突合せ浴接２ ｆｄ内管３に対して
ステンレス溶接４を行い、次いで外管５に対して鋼直接
６を行うようにしているが、このような手段では裏波が
出し帷い難点があり、又、溶接熱によりステンレスにク
ロム炭化物が析出しだり引張の残留応力が生じ応力腐蝕
割れが生ずる等の欠点があった。By the way, regarding butt welding of corrosion-resistant double tubes such as inner tube stainless steel and outer tube carbon steel used for transporting corrosive fluids such as crude oil, the opening of unit tubes 1 and l is shown in Fig. 1.2. Butt bath welding of the end of the tip tube 2 Stainless steel welding 4 is performed on the FD inner tube 3, and then steel direct welding 6 is performed on the outer tube 5, but with such a method, the back wave will come out. There are also drawbacks such as the precipitation of chromium carbide on the stainless steel due to welding heat and the generation of tensile residual stress, which may lead to stress corrosion cracking.
又、ステンレスによる内管の溶接と炭素５＠ニよる外管
の浴接の境界部は異種金属の混った状態となり、内外管
境界の間隙の存在とも相俟って溶接割れを生じ蕩い欠点
があった。In addition, the boundary between the welding of the inner tube made of stainless steel and the bath welding of the outer tube made of carbon 5@d becomes a mixture of different metals, which, together with the presence of a gap between the inner and outer tubes, causes weld cracks and deterioration. There were drawbacks.
これに対し、全浴接をステンレスで行うと強度不足にな
る不具合がありコスト高になる不利点もあった。On the other hand, if the entire bath is made of stainless steel, there is a problem of insufficient strength and a disadvantage of high cost.
この出願の発明の目的は上述従来技術に基づく耐蝕二重
管の突合せ溶接継手の問題点を解決すべき技術的課題と
し、突合せ溶接継手の優れた点を充分に生かしながら、
内管に対応する溶接部分を省略して溶接による割れを無
し、充分に耐蝕性、シール性を確保し、施工の容易性、
強度を得るようにして各種産業における耐蝕二重管利用
分野に益する優れた該耐蝕二重管の継手構造を提供せん
とするものである。The purpose of the invention of this application is to solve the problems of the butt-welded joints of corrosion-resistant double pipes based on the above-mentioned prior art, and to solve them while making full use of the advantages of the butt-welded joints.
By omitting the welded part corresponding to the inner pipe, there is no cracking due to welding, ensuring sufficient corrosion resistance and sealing performance, and ease of construction.
It is an object of the present invention to provide an excellent joint structure for corrosion-resistant double-pipe pipes that provides strength and is useful in the field of use of corrosion-resistant double-pipe pipes in various industries.
上述目的に浴うこの出願の発明の構成は１対のずれさせ
て後退管端にさせ、他方の内管々端をこれに対応させて
開先より位相ずれ前方に先出し位置させ、両管全嵌合さ
せ外管開先部に突合せ溶接し、この場合、内管を裏当金
に利用し、内管接合部と溶接部までの間に緊着部との間
にラビリンス部とされシールされるようになり、又、こ
れらの間に接着剤を嵌合に先立ち塗装させて結合させる
ようにした技術的手段を講じたことを要旨とするもので
ある。The structure of the invention of this application, which achieves the above-mentioned object, is to have a pair of inner tube ends shifted from each other so as to be retracted, and correspondingly, the ends of the other inner tubes are positioned ahead of the bevel with a phase shift, so that both tubes are completely closed. They are fitted and butt welded to the outer pipe groove, in which case the inner pipe is used as a backing metal and a labyrinth is created between the inner pipe joint and the welded part to create a seal. The gist of this invention is that a technical measure has been taken to apply an adhesive between these parts and bond them together prior to fitting.
次にこの出願の発明の実施例を第３図以下の図面に基づ
いて説明すれば以下の通りである。尚、第１．２図と同
一態様部分については同一符号を用いて説明するものと
する。Next, an embodiment of the invention of this application will be described below based on the drawings from FIG. 3 onwards. Note that the same parts as in FIG. 1.2 will be described using the same reference numerals.
第３〜６図に示す実施例において、１対のユニット耐蝕
二重管１．１′の双方の外管５．５′に断面テーバ状の
外開き開先７．７′を適宜機械加工し、内管３．３′に
ついては第３図に示す様に一方側を該開先７に７・１し
て切削して内開きテーバ部８′を形成させると共に第４
図に示す様に他方側を開先７′に対して設定量前位する
ように形成する。In the embodiment shown in Figs. 3 to 6, outward opening grooves 7.7' with a tapered cross section are machined as appropriate on both outer tubes 5.5' of a pair of unit corrosion-resistant double tubes 1.1'. As for the inner tube 3.3', as shown in FIG.
As shown in the figure, the other side is formed so as to be in front of the groove 7' by a set amount.
したがって、後者については内管３′に対して外管５′
ヲ切削して上記開先７′を後位形成するようにすれば口
い。Therefore, for the latter case, the outer tube 5' is compared to the inner tube 3'.
If the above-mentioned groove 7' is formed at the rear by cutting, the opening will be fine.
このように成形した後に両者を底合し、前出する他方の
内管３′ヲ一方の外管５内に挿入し内管３．３′のテー
パ部８．８′を緊着させ、外管５．５′に開先を形成す
る。After forming in this way, the two are bottomed together, the other inner tube 3' brought forward is inserted into one outer tube 5, the tapered part 8.8' of the inner tube 3.3' is tightly attached, and the outer tube is A bevel is formed in the tube 5.5'.
そこで第６図に示す様に開先部の裏側の他方の内管３′
を１種の裏当金として該開先部に鋼の突合せ溶接６を施
し継手９を完了する。Therefore, as shown in Fig. 6, the other inner pipe 3' on the back side of the groove
A steel butt weld 6 is applied to the groove portion using the metal as a type of backing metal to complete the joint 9.
尚、この場合、突合せ溶接は外管５．５′に対してのみ
行われるので内管３．３′に浴接加工は行われず、溶接
による影響や欠陥は生じない。In this case, since butt welding is performed only on the outer tube 5.5', no bath welding is performed on the inner tube 3.3', and no welding effects or defects occur.
」―述構成において、腐蝕性流体をＡ側から流過するよ
うにすると、内管３．３′の突合せ部８．８′及び核部
と突合せ溶接部６との間は１種のラビリンス部となり、
又、圧締緊着されているため、腐蝕性流体の侵入はない
。In the configuration described above, when the corrosive fluid is made to flow from the A side, a type of labyrinth is formed between the butt part 8.8' of the inner pipe 3.3' and the core part and the butt weld part 6. Then,
Also, since they are tightly pressed together, no corrosive fluid can enter.
又、内管３．３′の内面に裏波が形成されないために流
体の流過はスムースに行われ、圧損も生じない。Further, since no wave is formed on the inner surface of the inner tube 3.3', fluid flows smoothly and no pressure loss occurs.
第７図に示す実施例は上記内管３．３′の当接部を径方
向複膜のラビリンス部８′、８“′に積極的に形成し、
シール性を一段と同上させた態様である。In the embodiment shown in FIG. 7, the abutting portion of the inner tube 3.3' is positively formed in the labyrinth portions 8', 8"' of the radial double membrane,
This is an embodiment in which the sealing performance is further improved.
次に第８図に示す実施例は前述実施例の内管３．３′の
当接部と開先テーバ部７．７′に至る嵌合部にシーラン
ト等の工業接着剤１０＝ｉ予め塗布しておき、嵌合によ
り突合せ溶接６と共に連結強度を高めると共にシール性
を向上させた態様であり、第９図はその設計変更の実施
例を示した態様である。Next, in the embodiment shown in FIG. 8, an industrial adhesive 10=i such as a sealant is applied in advance to the abutting part of the inner tube 3.3' and the fitting part reaching the bevel taper part 7.7' of the above-mentioned embodiment. In addition, this is an embodiment in which the connection strength is increased together with the butt weld 6 by fitting, and the sealing performance is improved, and FIG. 9 shows an embodiment of the design change.
第１０図に示す実施例は上述実施例に加えてラビリンス
部を内管３．３′当接面に形成してシール効果を一層高
めると共に接着剤塗布面積を犬にして強度を高めるよう
にした態様である。In addition to the above-mentioned embodiment, the embodiment shown in Fig. 10 has a labyrinth part formed on the contact surface of the inner tube 3 and 3' to further enhance the sealing effect and to increase the strength by reducing the adhesive application area. It is a mode.
尚、この出願の発明の実施態様は上述各実施例ＶＬｃ限
るものでないことは勿論であり、例えば、前缶内管外側
面と対応外管内側面にネジ切を行って１１つ；合に代え
て螺合締結させるようにする再伸々の・１′Ｎ様が採用
可能である。It goes without saying that the embodiments of the invention of this application are not limited to the above-mentioned embodiments VLc. It is possible to adopt the 1'N type of re-stretching, which allows screwing and fastening.
［）１■述の如く、この出願の発明によれば、基本的に
耐蝕二重管用−Ｕの連結に突合せ溶接継手の良さを充分
に生かしながらも面１蝕材に対する溶接を全く行わず、
したがって、耐蝕内管の性能も変らず外管にａｌする溶
接だけで済み、浴接影響、浴接割れが生じない優れた効
果がある。[)1 As mentioned above, according to the invention of this application, although the advantages of butt welding joints are basically fully utilized for the connection of corrosion-resistant double pipes -U, no welding is performed on the corroded material at all on one side.
Therefore, the performance of the corrosion-resistant inner tube does not change, and only the aluminum welding to the outer tube is required, which has an excellent effect of preventing bath welding effects and bath welding cracks.
又、開先が内管上に形成されるため、施工時に核内管を
裏当金に使用することが出来る効果もある。Furthermore, since the groove is formed on the inner tube, there is an advantage that the inner tube can be used as a backing metal during construction.
そして、軸力に対しては外管突合せ継手溶接で充分に抗
力を生じさせることが出来る。In addition, sufficient resistance to the axial force can be generated by welding the outer tube butt joint.
加えて、内管にノ＆波が形成されないため、輸送流体が
スムースに流過し、抵抗が少く、圧倒が減少するという
効果もある。In addition, since no waves are formed in the inner pipe, the transport fluid flows smoothly, resulting in less resistance and less overwhelm.
更に、内管当接面と突合せ浴接との間に接着剤を介設す
るーことにより連結強度がより増加されるばかりでなく
、ンール性も向上する優れた効果が奏される。Further, by interposing an adhesive between the inner pipe abutting surface and the butt bath contact, not only the connection strength is further increased, but also the excellent effect of improving the unrollability is achieved.
第１図は従来態様の耐蝕二重管の浴接継手部分断面図、
第２図は同部分拡大断面図、第３図以下はこの出願の発
明の詳細な説明図であり、第３．４図は予備加工断面図
、第５１阻嵌合断面図、第６図は溶接断面図、第７図は
第６図対応別の実施例の断面図、第８図は他の実施例の
断面図、第９．１０図は第８図相当別の実施例の断面図
である。
３．３′・・・内管、 ５．５′・・・外管１
．１′・・・耐蝕二重管、 ６・・・突合せ溶接、８
．８′、８″、８“・・・内管突合せ当接部（面）、１
０・・・接着剤Figure 1 is a partial cross-sectional view of a conventional corrosion-resistant double pipe bath joint;
Fig. 2 is an enlarged sectional view of the same part, Fig. 3 and the following are detailed explanatory views of the invention of this application, Fig. 3.4 is a preliminary processing sectional view, No. 51 is a sectional view of the 51st block fitting, and Fig. Fig. 7 is a sectional view of another embodiment corresponding to Fig. 6, Fig. 8 is a sectional view of another embodiment, and Figs. 9 and 10 are sectional views of another embodiment corresponding to Fig. 8. be. 3.3'...inner tube, 5.5'...outer tube 1
．． 1'...Corrosion-resistant double pipe, 6...Butt welding, 8
．． 8', 8'', 8''...Inner pipe butt contact part (surface), 1
0...Adhesive
Claims (2)
突合せ溶接されている継手構造において、画工爪管の外
管の管端が突合せ溶接されており、而して内管相互の管
端突合せ部が該外管の突合せ溶接部に対して軸方向位相
ずれされて設けられていること全特徴とする耐蝕二重管
継手構造。(1) In a joint structure in which the pipe ends of a double pipe consisting of an inner pipe and an outer pipe are butt welded, the pipe ends of the outer pipe of the painter's claw pipe are butt welded, and A corrosion-resistant double pipe joint structure characterized in that the abutting portions of the tube ends of the inner tubes are provided axially out of phase with respect to the butt welding portion of the outer tube.
合せ溶接されている継手構造において、画工重管の外管
の管端が突合せ溶接されており、而して内管相互の管端
突合せ部が該外管の突合せｍ接部に対して軸方向位相ず
れされて設けられていると共に該内管相互の突合せ部と
上記外管の突合せ溶接部との間に亘って接着剤が介設さ
れていることを特徴とする耐蝕二重管継手構造。(2) In a joint structure in which the pipe ends of a double pipe consisting of a corrosion-resistant inner pipe and an outer pipe are butt welded, the pipe ends of the outer pipe of the painter's heavy pipe are butt welded, and the inner pipe is butt welded. The mutual abutting portions of the tube ends are provided axially out of phase with respect to the abutting m-joint portion of the outer tube, and extend between the mutual abutting portion of the inner tube and the butt welding portion of the outer tube. Corrosion-resistant double pipe joint structure characterized by intervening adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57141152A JPS5934088A (en) | 1982-08-16 | 1982-08-16 | Corrosion-resisting double pipe joint structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57141152A JPS5934088A (en) | 1982-08-16 | 1982-08-16 | Corrosion-resisting double pipe joint structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5934088A true JPS5934088A (en) | 1984-02-24 |
| JPH0114477B2 JPH0114477B2 (en) | 1989-03-13 |
Family
ID=15285340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57141152A Granted JPS5934088A (en) | 1982-08-16 | 1982-08-16 | Corrosion-resisting double pipe joint structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5934088A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007247702A (en) * | 2006-03-14 | 2007-09-27 | Mitsubishi Heavy Ind Ltd | Pipe joint structure |
| JP2014185592A (en) * | 2013-03-25 | 2014-10-02 | Honda Motor Co Ltd | Exhaust device of engine |
| KR20200082045A (en) * | 2018-12-28 | 2020-07-08 | 클래드코리아원주 주식회사 | Welding method for connection of clad pipe |
-
1982
- 1982-08-16 JP JP57141152A patent/JPS5934088A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007247702A (en) * | 2006-03-14 | 2007-09-27 | Mitsubishi Heavy Ind Ltd | Pipe joint structure |
| JP2014185592A (en) * | 2013-03-25 | 2014-10-02 | Honda Motor Co Ltd | Exhaust device of engine |
| KR20200082045A (en) * | 2018-12-28 | 2020-07-08 | 클래드코리아원주 주식회사 | Welding method for connection of clad pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0114477B2 (en) | 1989-03-13 |
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