JPH059670B2 - - Google Patents
Info
- Publication number
- JPH059670B2 JPH059670B2 JP7666484A JP7666484A JPH059670B2 JP H059670 B2 JPH059670 B2 JP H059670B2 JP 7666484 A JP7666484 A JP 7666484A JP 7666484 A JP7666484 A JP 7666484A JP H059670 B2 JPH059670 B2 JP H059670B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- tube
- metal
- corrosion
- joined
- 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
- 229910052751 metal Inorganic materials 0.000 claims description 64
- 239000002184 metal Substances 0.000 claims description 64
- 239000010935 stainless steel Substances 0.000 claims description 35
- 238000003466 welding Methods 0.000 claims description 29
- 238000005260 corrosion Methods 0.000 claims description 27
- 230000007797 corrosion Effects 0.000 claims description 27
- 229910000831 Steel Inorganic materials 0.000 claims description 25
- 239000010959 steel Substances 0.000 claims description 25
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 238000009792 diffusion process Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 8
- 238000005304 joining Methods 0.000 claims description 4
- 229910000975 Carbon steel Inorganic materials 0.000 description 9
- 239000010962 carbon steel Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 150000002739 metals Chemical class 0.000 description 4
- 229910001069 Ti alloy Inorganic materials 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/08—Coatings characterised by the materials used by metal
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Description
【発明の詳細な説明】
＜技術分類・分野＞
開示技術は、プラント等の配管の構造とその製
造技術分野に属する。[Detailed Description of the Invention] <Technical Classification/Field> The disclosed technology belongs to the technical field of piping structures in plants and the like and their manufacturing technology.
＜要旨の解説＞
而して、この出願の発明は、炭素鋼製等の外管
に対しTi等の耐蝕材がその管全体に内張接合さ
れて一種の二重管構造とされている耐蝕鋼管、及
び、その製造方法に関する発明であり、特に、ユ
ニツト長鋼管の管全体がその外管に於いて端管と
該端管に接合される一般管とから成り、該端管の
管端部に於いてはTi金属が拡散接合等の手段に
よつて冶金的に接合されており、又、該端管の
Ti金属を含めて管全体にTi金属内管が内張接合
され、更に、該内張接合Ti金属内管は上記端管
の管端部に於いてTi金属にてシール溶接され、
而して、該ユニツト長鋼管の連結による設定長の
管体には継手部に対するTi金属の外管に対する
オーバーラツプによるシール性、耐蝕性が確実に
されている二重管タイプの耐蝕鋼管とその製造方
法に係る発明である。<Explanation of the gist> The invention of this application is a corrosion-resistant material in which an outer tube made of carbon steel or the like is lined with a corrosion-resistant material such as Ti to form a kind of double-pipe structure. This invention relates to a steel pipe and a method for manufacturing the same, and in particular, the entire pipe of a unit long steel pipe consists of an end pipe in its outer pipe and a general pipe joined to the end pipe, and the pipe end of the end pipe is In this case, the Ti metal is metallurgically joined by means such as diffusion bonding, and the end tube is
A Ti metal inner tube is lined and bonded to the entire tube including Ti metal, and further, the inner lined and bonded Ti metal inner tube is seal-welded with Ti metal at the tube end of the end tube,
Therefore, the pipe body of the set length by connecting the unit long steel pipes is a double pipe type corrosion-resistant steel pipe whose sealing performance and corrosion resistance are ensured by overlapping the Ti metal outer pipe at the joint part, and its manufacture. This invention relates to a method.
＜従来技術＞
周知の如く、油井管や化学プラント、原子力プ
ラント配管等に用いる管は単なる耐圧性や耐熱性
ばかりでなく、耐蝕性も必要とされている。<Prior Art> As is well known, pipes used for oil country tubular goods, chemical plants, nuclear power plant piping, etc. are required to have not only mere pressure resistance and heat resistance, but also corrosion resistance.
このような条件に合致する耐蝕鋼管としては、
高合金のステンレス鋼やNi基合金が用いられて
きたが、かかる合金は高価であるために、耐熱、
耐圧性を炭素鋼製等の外管でもたせ、その内面に
ステンレス鋼製等の耐蝕金属製の内管を冶金的、
或は、機械的にライニングして耐蝕性を付与する
ような手段が案出されてきている。 Corrosion-resistant steel pipes that meet these conditions include:
High-alloy stainless steel and Ni-based alloys have been used, but these alloys are expensive and have poor heat resistance.
An outer tube made of carbon steel or other material provides pressure resistance, and an inner tube made of a corrosion-resistant metal such as stainless steel is attached metallurgically to the inner surface.
Alternatively, methods have been devised to provide corrosion resistance by mechanically lining the material.
例えば、第１３，１４図に示す様に炭素鋼製外
管９，９の各々にオーステナイト鋼製内管１０を
挿入し、液圧拡管等により嵌合密着させて第１
５，１６図に示す様に内管１０の管端を外管９の
内面にシール溶接１２，１２を行つて密封シール
する。 For example, as shown in FIGS. 13 and 14, an austenitic steel inner tube 10 is inserted into each of the carbon steel outer tubes 9 and 9, and the first tube is fitted tightly by hydraulic expansion or the like.
As shown in Figures 5 and 16, the ends of the inner tube 10 are hermetically sealed by seal welding 12, 12 to the inner surface of the outer tube 9.
そして、ユニツト端管相互を第１７図に示す様
に外管９，９相互の突合せ溶接８を行つて連結す
るようにし、続いて第１８図に示す様に内管１
０，１０の管端相互をオーステナイト系ステンレ
ス鋼の溶加材料にて肉盛溶接１８で連接するよう
にしている。 Then, the unit end tubes are connected to each other by butt welding 8 between the outer tubes 9 and 9 as shown in FIG.
The tube ends of tubes 0 and 10 are connected to each other by overlay welding 18 using filler material of austenitic stainless steel.
而して、このように外管に耐蝕内管を接合する
技術としては、機械的なライニング等の接合より
もクラツドのような冶金的な接合の方が強度的に
優れていることはよく知られている。 It is well known that metallurgical joints such as cladding are superior in terms of strength to mechanical lining and other joints when it comes to joining the corrosion-resistant inner pipe to the outer pipe. It is being
而して、例えば、耐蝕性に優れているTi、或
は、Ti合金等のTi金属（以下これらをTi金属と
総称する。）を用いて外管に冶金的に接合するこ
とは一般には技術的に困難である。 Therefore, for example, it is generally difficult to metallurgically bond the outer tube using Ti metal such as Ti or Ti alloy (hereinafter collectively referred to as Ti metal), which has excellent corrosion resistance. It is difficult to do so.
さりながら、近時Ti金属と炭素鋼等を、例え
ば、爆着、或は、拡散接合等の手段によつて冶金
的に接合することが技術的に可能となつてきてい
る。 However, in recent years, it has become technically possible to join Ti metal and carbon steel etc. metallurgically by means such as explosion bonding or diffusion bonding.
ところで、一般に配管はその長さが長ければ長
いほど継手部が少なくなり、強度的に安定するの
みならず、配管作業が少なくて済むというメリツ
トがあるが、配管のユニツト長には工場での製造
時に装置上の制約がある上に、現地据付けまでに
工場から輸送する際に長さにも制限があるため、
その長さは規格的にユニツト長として決められて
いる。 By the way, in general, the longer the length of piping, the fewer joints it has, which not only provides stability in terms of strength, but also has the advantage of requiring less piping work. Sometimes there are restrictions on the equipment, and there are also restrictions on the length when transporting from the factory before on-site installation.
Its length is standardly determined as the unit length.
勿論、特殊な場合には素材を接合した後に塑性
加工するような手段もあるが、一般には炭素鋼製
外管と耐蝕Ti金属との加工性の違いもあるため、
耐蝕鋼管に於いては長尺の塑性加工は困難とされ
ている。 Of course, in special cases there is a method of plastic working after joining the materials, but in general there is a difference in workability between the carbon steel outer tube and the corrosion-resistant Ti metal.
Plastic working of long lengths of corrosion-resistant steel pipes is considered difficult.
而して、上記設定ユニツト長の耐蝕鋼管を工場
で製造した後に現地据付けのための輸送を行う
が、その間、一時的に野積等をする場合があり、
この間、外管と内張接合された耐蝕内管とは管端
に於いて経時的に腐蝕が境界面の内側に進行する
虞れがあるために、管端に一般にはシール溶接を
しなければならない。 Therefore, after the corrosion-resistant steel pipes of the above specified unit length are manufactured at the factory, they are transported for on-site installation, but during that time, they may be temporarily piled up in the open.
During this time, the corrosion-resistant inner tube that is lined and joined to the outer tube generally has to be sealed by welding at the tube end because there is a risk that corrosion will progress to the inside of the interface over time. It won't happen.
さりながら、外管の炭素鋼等と内面の耐蝕Ti
金属とは中間材を用いてもその接合強度が充分に
は期待出来ないという欠点があつた。 However, the outer tube is made of carbon steel and the inner surface is made of corrosion-resistant Ti.
Metals have the disadvantage that even if an intermediate material is used, sufficient bonding strength cannot be expected.
又、このように、内張接合接合される耐蝕性の
Ti金属はその耐蝕性においては優れてはいるも
のの、鋼管管端に於けるシール溶接には冶金的に
不都合さがあるという難点があつた。 In addition, in this way, the corrosion-resistant
Although Ti metal has excellent corrosion resistance, it has the disadvantage of being metallurgically inconvenient for seal welding at the ends of steel pipes.
そして、製造されたユニツト長の鋼管相互を管
端同志連結する場合にも上述の不都合により腐蝕
が進行しない状態で完全にシールすることが出来
難いという難点があつた。 Furthermore, when connecting the manufactured unit-length steel pipes to each other at their ends, there is a problem in that it is difficult to completely seal the pipes without corrosion due to the above-mentioned disadvantages.
＜発明の目的＞
この出願の発明の目的は上述従来技術に基づく
耐蝕材内張接合耐蝕鋼管の問題点を解決すべき技
術的課題とし、その耐蝕性に優れたTi金属を外
管に対する内張接合の内管として有効に利用出来
るようにし、而して、その管端に於けるシール溶
接が確実に充分な強度を有して行えることが出
来、又、ユニツト長鋼管相互の継手部に於いても
同様に出来るようにし、更には使用時全長的に耐
蝕機能が保持可能であるようにして、各種産業に
おける配管利用分野に益する優れた耐蝕鋼管、及
び、その製造方法を提供せんとするものである。<Purpose of the Invention> The purpose of the invention of this application is to solve the problems of corrosion-resistant steel pipes lined with corrosion-resistant materials based on the above-mentioned prior art, and to use Ti metal, which has excellent corrosion resistance, as a lining for the outer pipe. It can be effectively used as an inner pipe for joining, and seal welding at the end of the pipe can be reliably performed with sufficient strength. To provide an excellent corrosion-resistant steel pipe and a method for manufacturing the same, which can be made in the same way even when the pipe is in use, and which can maintain its corrosion-resistant function over its entire length during use, thereby benefiting piping applications in various industries. It is something.
＜発明の構成＞
上述目的に沿い先述特許請求の範囲を要旨とす
るこの出願の発明の構成は、前述問題点を解決す
るために炭素鋼製等の外管を予め設計的に端管と
一般管に二分割しておき、該端管の管端部に所定
のTi金属を拡散接合などの手段により冶金的に
接合し、次いで、上記二分割の外管の一般管を端
管と対応させて突合せ溶接等により接合し、その
後、該端管、及び、一般管を含めて略管全体内面
に所定のTi金属内管を相対重層させて液圧拡管
等の手段により充分な嵌合代を介し緊結結合して
内張接合し、次いで、上記管端部の接合Ti金属
と該内張接合したTi金属内管とを接合して管端
部を確実にシールさせたユニツト長鋼管を得るよ
うにし、製造後から現場据付け間での野積等にお
いても管端部における腐蝕侵入に対処出来るよう
に、而して、該ユニツト長鋼管相互の連結に際し
ては上記管端部Ti金属間にTi金属短管を介装さ
せる等してTi金属とTi金属内管を突き合せ溶接
し、外管管端を突き合せ溶接して所定長の耐蝕鋼
管を得ることが出来るようにした技術的手段を講
じたものである。<Structure of the Invention> In accordance with the above-mentioned purpose, the structure of the invention of this application, which is summarized in the claims of the above-mentioned patent application, is to solve the above-mentioned problems by designing an outer tube made of carbon steel or the like in advance by combining it with an end tube and a general tube. The pipe is divided into two parts, a predetermined Ti metal is metallurgically joined to the end part of the end pipe by means such as diffusion bonding, and then the general pipe of the outer pipe of the two parts is made to correspond to the end pipe. Then, a predetermined Ti metal inner tube is relatively layered on the inner surface of almost the entire tube including the end tube and the general tube, and a sufficient fitting allowance is made by means such as hydraulic tube expansion. Then, the joined Ti metal at the tube end and the Ti metal inner tube which was lined and joined are joined to obtain a unit long steel pipe in which the tube end is reliably sealed. In order to prevent corrosion from entering the pipe ends even when they are piled up in the open between manufacturing and on-site installation, when connecting the unit long steel pipes to each other, Ti metal shorts are placed between the Ti metals at the pipe ends. Technical measures were taken to butt weld the Ti metal and Ti metal inner tubes by interposing a tube, and to butt weld the ends of the outer tube to obtain a corrosion-resistant steel tube of a predetermined length. It is something.
＜実施例−構成＞
次に、この出願の発明の実施例を第１図より第
１２図までの図面に基づいて説明すれば以下の通
りである。<Example - Configuration> Next, an example of the invention of this application will be described below based on the drawings from FIG. 1 to FIG. 12.
第１〜１０図に示す実施例は化学プラント等に
用いる溶接継手連結のの耐蝕鋼管の態様であり、
外管の一般管と分割された、第１，２図に示す端
管１，１′は炭素鋼製であり、その前端には突き
合せ溶接用の開先２，２′が形成され、一方の開
先２′にはせぎり嵌合部２″が機械加工により形成
されている。 The embodiments shown in Figs. 1 to 10 are embodiments of corrosion-resistant steel pipes connected by welded joints used in chemical plants, etc.
The end tubes 1 and 1' shown in Figs. 1 and 2, which are separated from the general outer tube, are made of carbon steel, and grooves 2 and 2' for butt welding are formed at the front ends of the end tubes. A serration fitting portion 2'' is formed in the groove 2' by machining.
そして、両者の先端部の内面には内張接合部
３，３が所定の機械加工により穿設され、又、後
端には同じく突き合せ溶接用の開先加工４，４′
が形成されてある。 Then, lining joint parts 3, 3 are bored on the inner surface of the tips of both by a predetermined machining process, and grooves 4, 4' for butt welding are similarly formed on the rear ends.
is formed.
而して、このように形成された外管の端管１，
１′に対して、第３，４図に示す様に、内面が上
記接合部３，３に対しTi金属製であつて、内面
が該端管１と面一部５を有している短円筒状の短
管６を拡散接合により一体化固着する。 Thus, the end tube 1 of the outer tube formed in this way,
1', as shown in FIGS. 3 and 4, there is a short tube whose inner surface is made of Ti metal and whose inner surface has the end tube 1 and the surface portion 5. The cylindrical short tube 6 is integrally fixed by diffusion bonding.
尚、この場合、該拡散接合は上記端管１，１′
が短いために通常一般の拡散接合手段を用いるこ
とが出来るものである。 In this case, the diffusion bonding is performed on the end pipes 1, 1'
Since the length is short, ordinary diffusion bonding means can be used.
このようにして、各端管１，１′が形成される
と、第５，６図に示す様に、外管の分割体として
の炭素鋼製の一般管７，７をその先端開先を介し
て端管１，１′に対し突合せ溶接８，８を形成し
一体連結して外管９，９′を形成する。 When the end tubes 1 and 1' are formed in this way, as shown in FIGS. Butt welds 8, 8 are formed on the end tubes 1, 1' via the outer tubes 1, 1' to integrally connect them to form outer tubes 9, 9'.
このように外管９，９′が形成されると、第７，
８図に示す様に、その内部にTi金属の内管１０，
１０を外管９，９′の上記Ti金属の短管６，６の
中途まで相対重層し、該外管９，９′と内管１０，
１０とを周知の液圧拡管等により充分な嵌合代を
介して緊結結合する。 When the outer tubes 9, 9' are formed in this way, the seventh,
As shown in Figure 8, there is an inner tube 10 made of Ti metal inside it.
10 are relatively stacked up to the middle of the above Ti metal short tubes 6, 6 of the outer tubes 9, 9', and the outer tubes 9, 9' and the inner tubes 10,
10 are tightly connected to each other by a well-known hydraulic pipe expansion or the like with a sufficient fitting margin.
この状態においては内管１０，１０と外管９，
９′の端管１，１′の先端部のTi金属の短管６，
６とはその先端に於いてオーバーラツプするため
に、そこで両者をオーバーラツプ部１１，１１に
於いて適宜シール溶接１２，１２を行つて管端シ
ールを行う。 In this state, the inner tubes 10, 10, the outer tube 9,
9' end tube 1, Ti metal short tube 6 at the tip of 1',
6 and 6 overlap at their tips, therefore, seal welding 12, 12 is appropriately performed on the overlapped portions 11, 11 of the two to seal the tube ends.
尚、この場合、端管１，１′の管端部は短管６，
６と内管１０，１０とがTi金属相互であること
により、上記シール溶接１２，１２は容易に行わ
れ、その強度は充分に確保出来、又、該端管１，
１′のオーバーラツプ部１１，１１に於いては、
予め、拡散接合によりTi金属の短管６，６は端
管１，１′に確実に冶金的に接合されている。 In this case, the tube ends of the end tubes 1 and 1' are connected to the short tubes 6 and 1'.
6 and the inner tubes 10, 10 are made of Ti metal, the seal welding 12, 12 can be easily performed and sufficient strength can be ensured.
In the overlap portions 11 and 11 of 1',
In advance, the Ti metal short tubes 6, 6 are reliably metallurgically bonded to the end tubes 1, 1' by diffusion bonding.
したがつて、このようにして得られる第７，８
図に示すユニツト長の耐蝕鋼管１３，１３′を製
造した後に、現地輸送までの間、野積等を行つて
も、その管端から腐蝕等が内管１０，１０と外管
９，９′の境界に侵入する虞れは全くなくなる。 Therefore, the seventh and eighth results obtained in this way
Even if the corrosion-resistant steel pipes 13, 13' of the unit length shown in the figure are manufactured and piled up in the open until they are transported to the site, corrosion will occur from the ends of the inner pipes 10, 10 and outer pipes 9, 9'. There is no possibility of intruding into the boundary.
而して、上述各ユニツト長の耐蝕鋼管１３，１
３′…を現地まで輸送し、据付けするに際しては、
第９図に示す様に、ユニツト長の耐蝕鋼管１３，
１３′の管端の開先２，２′を突出部とアンダカツ
ト状のせぎり部２″の嵌合を介しての突き合せを
内管１０，１０と同一厚さ、径のTi金属短管１
４の介装、オーバーラツプを介して行い、第１０
図に示す様に、該内管１０，１０と短管１４の
Ti金属相互の突き合せ溶接１５，１５、及び、
開先２，２′の突き合せ溶接１６を行つて両ユニ
ツト長鋼管１３，１３′の連結を終了する。 Therefore, the corrosion-resistant steel pipes 13, 1 of each unit length mentioned above are
When transporting and installing 3'... to the site,
As shown in FIG. 9, a unit-length corrosion-resistant steel pipe 13,
The bevels 2, 2' at the ends of the pipes 13' are butted together through the fitting of the protruding part and the undercut-shaped serration part 2''.
The 4th intervention is done through the overlap, and the 10th
As shown in the figure, the inner pipes 10, 10 and the short pipe 14 are
Butt welding of Ti metals 15, 15, and
Butt welding 16 is performed on the grooves 2 and 2' to complete the connection of both unit long steel pipes 13 and 13'.
この場合、Ti金属短管１４と内管１０，１０
との突き合せ溶接１５，１５は端管１，１′の開
先２，２′の突き合せ溶接後でも良い。 In this case, the Ti metal short tube 14 and the inner tubes 10, 10
The butt welding 15, 15 may be performed after the butt welding of the grooves 2, 2' of the end tubes 1, 1'.
又、この場合、突き合せ溶接１６は貫通タイプ
でも良く、開先形状は適宜でも良い。 Further, in this case, the butt weld 16 may be of a penetrating type, and the groove shape may be arbitrary.
尚、内管１０，１０と短管１４の突き合せ溶接
は短い方の鋼管１３，１３′の開口端からの溶接
治具挿入により適宜可能である。 Note that butt welding of the inner tubes 10, 10 and the short tube 14 can be appropriately performed by inserting a welding jig from the open end of the shorter steel tube 13, 13'.
このようにして、順次連結されていくユニツト
長の耐蝕鋼管１３，１３′…の内面はTi金属内管
１０，１０…と短管１４，１４…の交互連結によ
り面一にされ、継手部に於いても短管６と溶接部
１５、短管１４と突き合せ溶接部１６がオーバー
ラツプし確実に耐蝕シールが成される。 In this way, the inner surfaces of the unit-length corrosion-resistant steel pipes 13, 13', which are successively connected, are made flush by the alternate connection of the Ti metal inner pipes 10, 10, and the short pipes 14, 14, and Even in this case, the short tube 6 and the welded portion 15 overlap, and the short tube 14 and the butt welded portion 16 overlap to ensure a corrosion-resistant seal.
又、第１１図に示す実施例は同じくプラント
用、或は、輸送用の配管の態様であるが、上述実
施例同様に炭素鋼製の外管を二分割した端管１，
１′の開先に対称的にアンダカツトを形成してお
き連結時に該アンダカツト部に鋼管短管１７を上
記短管１４に上層させて介装させ、開先２，２′
を介して該端管１，１′に突合せ溶接１６により
一体連結するようにした態様である。 Further, the embodiment shown in FIG. 11 is also an embodiment of piping for a plant or transportation, but like the above embodiment, an end pipe 1, which is a carbon steel outer pipe divided into two parts, is used.
An undercut is formed symmetrically at the groove 1', and a short steel pipe 17 is placed above the short tube 14 and interposed in the undercut at the time of connection.
In this embodiment, it is integrally connected to the end pipes 1, 1' by butt welding 16 through the end tubes 1, 1'.
又、第１２図に示す実施例は一方のユニツト長
の耐蝕鋼管１３に於いてTi金属短管６′を開先２
より突出させて拡散溶接して他方のユニツト長鋼
管１３′の開先２′のアンダカツト状せぎり部２″
に対応重合させるようにし、更に内管１０′を該
他方のユニツト長鋼管１３′のTi金属短管６にオ
ーバーラツプする長さに突出形成させておくよう
にした態様であり、野積み時の腐蝕侵入防止等の
作用効果は上述各実施例同様である。 In addition, in the embodiment shown in FIG. 12, in one unit length of the corrosion-resistant steel pipe 13, a Ti metal short pipe 6' is grooved 2.
The undercut-shaped serration 2'' of the groove 2' of the other unit long steel pipe 13' is made to protrude further and is diffusion welded.
In addition, the inner tube 10' is formed to protrude to a length that overlaps the Ti metal short tube 6 of the other unit long steel tube 13', thereby preventing corrosion during open storage. The effects such as prevention of intrusion are the same as in each of the above-mentioned embodiments.
尚、この出願の発明の実施態様は上述各実施例
に限るものでないことは勿論であり、例えば、適
用対象は化学プラント配管に限らず、原子力配管
等にも使用出来、ユニツト長の耐蝕鋼管の端管の
肉厚や直径などは自由に選択する種々の態様が採
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. For example, the application target is not limited to chemical plant piping, but can also be used for nuclear power piping, etc., and can be applied to unit-length corrosion-resistant steel pipes. Various embodiments can be adopted in which the wall thickness and diameter of the end tube can be freely selected.
又、内張接合の内管はその材質がTiに限らず
Ti合金でも良いことは勿論である。 In addition, the material of the inner pipe for lined joints is not limited to Ti.
Of course, a Ti alloy may also be used.
又、外管の端管の内面に内張接合するTi金属
については前述拡散接合のみならず、圧接等も使
用することが出来る。 Furthermore, for the Ti metal that is lined and bonded to the inner surface of the end tube of the outer tube, not only the above-mentioned diffusion bonding but also pressure bonding or the like can be used.
＜発明の効果＞
以上、この出願の発明によれば、基本的に耐蝕
鋼管に於いてその外管に対し内張接合する内管が
TiやTi合金等のTi金属であるために、極めて、
その耐蝕性能が良く、耐蝕鋼管として充分に機能
することが出来るという優れた効果が奏される。<Effects of the Invention> As described above, according to the invention of this application, basically, in a corrosion-resistant steel pipe, the inner pipe that is lined and joined to the outer pipe is
Because it is a Ti metal such as Ti or Ti alloy, it is extremely
It has excellent corrosion resistance and can function satisfactorily as a corrosion-resistant steel pipe.
又、ユニツト長の鋼管の管端部に於いて端管の
Ti金属に対して管全体に接合されたTi金属製の
内管が管端部にてTiシールされているために、
耐蝕鋼管が工場に於いて製造された後、現地据付
けまでに輸送等の条件から野積等された場合にお
いても、管端から腐蝕が外管と内管との間に侵入
進行しないという優れた効果が奏される。 Also, at the end of a unit length steel pipe, the
Since the inner tube made of Ti metal is joined to the entire tube with Ti metal and is sealed with Ti at the tube end,
Even if corrosion-resistant steel pipes are manufactured in a factory and then piled up in the open due to transport or other conditions before being installed on-site, this has the excellent effect of preventing corrosion from entering the space between the outer and inner pipes from the pipe ends. is played.
而して、該外管の端管の管端部に短いTi金属
が内張接合されているために、該内張接合短管と
の拡散溶接等のTiシール溶接がし易く、したが
つて、管端部に於けるシールが確実に行われると
いう優れた効果が奏される。 Since a short Ti metal is lined and bonded to the end of the end tube of the outer tube, it is easy to perform Ti seal welding such as diffusion welding with the short tube that is lined and bonded. This provides an excellent effect of ensuring reliable sealing at the tube end.
而して、該耐蝕鋼管の製造方法においては外管
の端管と一般管を分割しておき、予め、該端管の
管端部にTi金属を冶金的に接合しておくように
したために、該外管の端管に対してTi金属は拡
散接合などを行う場合に、その長さが短いことに
より装置内に容易にセツト出来、最終製品として
の耐蝕鋼管の長さに無関係にその端管にTi金属
を接合することが出来るという優れた効果が奏さ
れる。 Therefore, in the method for manufacturing the corrosion-resistant steel pipe, the end pipe of the outer pipe and the general pipe are separated, and Ti metal is metallurgically joined to the end of the end pipe in advance. When performing diffusion bonding on the end tube of the outer tube, Ti metal can be easily set in the equipment due to its short length, and the end tube can be easily attached to the end tube regardless of the length of the corrosion-resistant steel tube as the final product. The excellent effect of being able to join Ti metal to the tube is achieved.
而して、該Ti金属を接合した端管に対して一
般管を接合して連結するために、その外管全体の
形成は容易に行うことが出来るという効果が奏さ
れる。 Since the general pipe is joined and connected to the end pipe to which the Ti metal is joined, the entire outer pipe can be easily formed.
又、このようにして形成された外管の内側に
Ti金属内管を管全体に相対重層して該Ti金属内
管を管全体内面に接合するために管端に於いて上
記端管のTi金属の管端部に対してTiシール溶接
することによつて確実に外管に対する内張接合の
Tiシール溶接を行つてシールすることが出来る
という効果が奏される。 Also, inside the outer tube formed in this way,
In order to layer the Ti metal inner tube over the entire tube and join the Ti metal inner tube to the inner surface of the entire tube, a Ti seal weld is performed at the tube end to the Ti metal tube end of the end tube. This ensures that the lining is joined to the outer tube.
The effect is that it can be sealed by performing Ti seal welding.
而して、このようにユニツト長耐蝕鋼管相互
は、継手部に於いて外管とTi金属がオーバーラ
ツプするようにされていることによりシール性も
耐蝕性も確実にされるという優れた効果が奏され
る。 In this way, the unit-long corrosion-resistant steel tube has the excellent effect of ensuring both sealing performance and corrosion resistance by overlapping the outer tube and the Ti metal at the joint. be done.
更に、Ti金属相互によりTiシール溶接が行わ
れ得るため溶接がし易く上述の確実性がより保証
されるという効果がある。 Furthermore, since Ti seal welding can be performed between Ti metals, welding is easy and the above-mentioned reliability is further guaranteed.
図面はこの出願の発明の実施例を示すものであ
り、第１〜１０図は１実施例の製造方法プロセス
説明図である。第１図は一方の短管の断面図であ
る。第２図は他方の短管の断面図である。第３図
は一方の短管のTiシール断面図である。第４図
は他方の短管のTiシール断面図である。第５図
は一方の外管の断面図である。第６図は他方の外
管の断面図である。第７図は一方のユニツト鋼管
の断面図である。第８図は他方のユニツト鋼管の
断面図である。第９図は鋼管接合断面図である。
第１０図は鋼管連結断面図である。第１１図は他
の実施例の耐蝕鋼管の製造説明断面図である。第
１２図は別の耐蝕鋼管の製造説明断面図である。
第１３図は従来技術に基づく一方の管端断面図で
ある。第１４図は従来技術に基づく他方の管端断
面図である。第１５図は同一方の管端の内管シー
ル溶接断面図である。第１６図は同他方の管端の
内面シール溶接断面図である。第１７図は同外管
相互の突合せ溶接断面図である。第１８図は同管
の継手断面図である。
７……外管、６，１０，１４，１７……耐蝕
材、１３，１３′……（ユニツト長）耐蝕鋼管、
１，１′……端管、６……Ti金属、１０……Ti金
属内管、３……せぎり。
The drawings show an embodiment of the invention of this application, and FIGS. 1 to 10 are explanatory diagrams of the manufacturing method process of one embodiment. FIG. 1 is a sectional view of one of the short tubes. FIG. 2 is a sectional view of the other short tube. FIG. 3 is a sectional view of the Ti seal on one of the short tubes. FIG. 4 is a sectional view of the Ti seal on the other short tube. FIG. 5 is a sectional view of one outer tube. FIG. 6 is a sectional view of the other outer tube. FIG. 7 is a sectional view of one unit steel pipe. FIG. 8 is a sectional view of the other unit steel pipe. FIG. 9 is a sectional view of the steel pipe joint.
FIG. 10 is a sectional view of the steel pipe connection. FIG. 11 is a sectional view illustrating the manufacture of a corrosion-resistant steel pipe according to another embodiment. FIG. 12 is a sectional view illustrating the manufacture of another corrosion-resistant steel pipe.
FIG. 13 is a cross-sectional view of one tube end based on the prior art. FIG. 14 is a sectional view of the other tube end based on the prior art. FIG. 15 is a sectional view of the inner tube seal welded at one end of the same tube. FIG. 16 is a sectional view of the inner seal welding of the other tube end. FIG. 17 is a cross-sectional view of butt welding of the outer tubes. FIG. 18 is a sectional view of the joint of the pipe. 7... Outer pipe, 6, 10, 14, 17... Corrosion resistant material, 13, 13'... (unit length) Corrosion resistant steel pipe,
1, 1'...End tube, 6...Ti metal, 10...Ti metal inner tube, 3...Segiri.
Claims (1)
鋼管において、ユニツト長鋼管が外管と該外管に
接合されたTi内管とから成り、更に該外管が端
管と該端管に接合された一般管とより成り、該端
管の管端部にTi金属が冶金的に接合され、又略
管全体内面に接合されたTi金属内管が管端部に
てTiシール溶接され、而して各ユニツト長鋼管
継手部にて外管溶接部とTi金属とがオーバーラ
ツプしていることを特徴とする耐蝕鋼管。 ２ 上記オーバーラツプの部分がTi金属内管相
互間のTi金属短管と外管によつて構成されてい
ることを特徴とする上記特許請求の範囲第１項記
載の耐蝕鋼管。 ３ 上記オーバーラツプの部分が一方のユニツト
長鋼管の外管に対するその管端より長いTi金属
内管と外管とにより構成されていることを特徴と
する上記特許請求の範囲第１項記載の耐蝕鋼管。 ４ 上記各ユニツト長鋼管の端管と端管との接合
がアンダカツト状のせぎりを一方に有する開先間
の溶接によつて成されていることを特徴とする上
記特許請求の範囲第１項記載の耐蝕鋼管。 ５ 予め外管の端管の管端部にTi金属を冶金的
に接合しておき、次いで外管の一般管を接合し、
その略管全体内面にTi金属内管を内張接合し、
その後該内張接合Ti金属内管と上記端管の管端
部とをTiシール溶接するようにしてユニツト長
鋼管を形成し、而して各ユニツト長鋼管を溶接継
手部にTi金属を外管にオーバーラツプさせて溶
接連結するようにしたことを特徴とする耐蝕鋼管
製造方法。 ６ 上記Ti金属の接合が拡散溶接によつて成さ
れることを特徴とする上記特許請求の範囲第６項
記載の耐蝕鋼管製造方法。 ７ 上記Ti金属の接合が圧接によつて成される
ことを特徴とする上記特許請求の範囲第６項記載
の耐蝕鋼管製造方法。 ８ 上記オーバーラツプさせる溶接が一方のTi
金属内管と両ユニツト長鋼管の各Ti金属とのTi
溶接によつて行われることを特徴とする上記特許
請求の範囲第６項記載の耐蝕鋼管製造方法。 ９ 上記Ti金属の冶金的接合が端管内面に機械
的に形成した凹部に対して行われることを特徴と
する上記特許請求の範囲第６項記載の耐蝕鋼管製
造方法。[Scope of Claims] 1. A corrosion-resistant steel pipe in which a corrosion-resistant material is lined and joined to an outer pipe, in which a unit long steel pipe consists of an outer pipe and a Ti inner pipe joined to the outer pipe, and the outer pipe further comprises a Ti inner pipe joined to the outer pipe. It consists of an end pipe and a general pipe joined to the end pipe, with Ti metal metallurgically joined to the pipe end of the end pipe, and a Ti metal inner pipe joined to the inner surface of the entire pipe at the pipe end. A corrosion-resistant steel pipe characterized in that the outer pipe welded part and the Ti metal overlap at each unit long steel pipe joint part. 2. The corrosion-resistant steel pipe according to claim 1, wherein the overlapping portion is constituted by a Ti metal short tube and an outer tube between the Ti metal inner tube. 3. The corrosion-resistant steel pipe according to claim 1, wherein the overlapping portion is composed of a Ti metal inner pipe and an outer pipe that are longer than the outer pipe end of one unit long steel pipe. . 4. According to claim 1, wherein the end pipes of each of the unit long steel pipes are joined by welding between grooves having an undercut-like serration on one side. Corrosion-resistant steel pipe. 5 Ti metal is metallurgically joined to the end of the end pipe of the outer pipe in advance, and then the general pipe of the outer pipe is joined,
A Ti metal inner tube is lined and joined to the inner surface of the entire tube,
Thereafter, a unit long steel tube is formed by Ti seal welding the lined joint Ti metal inner tube and the tube end of the end tube, and then Ti metal is applied to the welded joint of each unit long steel tube to form an outer tube. A method for manufacturing a corrosion-resistant steel pipe, characterized in that the pipes are overlapped and welded together. 6. The method of manufacturing a corrosion-resistant steel pipe according to claim 6, wherein the Ti metal is joined by diffusion welding. 7. The method of manufacturing a corrosion-resistant steel pipe according to claim 6, wherein the Ti metal is joined by pressure welding. 8 The overlapping weld mentioned above is on one side of Ti.
Ti between each Ti metal of the metal inner tube and both unit long steel tubes
7. The method of manufacturing a corrosion-resistant steel pipe according to claim 6, wherein the manufacturing method is carried out by welding. 9. The method of manufacturing a corrosion-resistant steel pipe according to claim 6, wherein the metallurgical joining of the Ti metal is performed in a recess mechanically formed on the inner surface of the end pipe.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7666484A JPS60222682A (en) | 1984-04-18 | 1984-04-18 | Corrosion-resistant steel pipe and manufacture thereof |
| DE8585100385T DE3571683D1 (en) | 1984-01-20 | 1985-01-16 | Corrosion resisting steel pipe and method of manufacturing same |
| EP85100385A EP0150041B1 (en) | 1984-01-20 | 1985-01-16 | Corrosion resisting steel pipe and method of manufacturing same |
| CA000472321A CA1239100A (en) | 1984-01-20 | 1985-01-17 | Corrosion resisting steel pipe and method of manufacturing same |
| US07/310,003 US4883292A (en) | 1984-01-20 | 1989-02-10 | Corrosion resisting steel pipe and method of manufacturing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7666484A JPS60222682A (en) | 1984-04-18 | 1984-04-18 | Corrosion-resistant steel pipe and manufacture thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60222682A JPS60222682A (en) | 1985-11-07 |
| JPH059670B2 true JPH059670B2 (en) | 1993-02-05 |
Family
ID=13611675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7666484A Granted JPS60222682A (en) | 1984-01-20 | 1984-04-18 | Corrosion-resistant steel pipe and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60222682A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2760352C1 (en) * | 2021-03-18 | 2021-11-24 | Акционерное Общество "Наука И Инновации" | Method for forming anti-corrosive coating on the shaped surface of a product of structural steel of perlite class |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60261688A (en) * | 1984-06-07 | 1985-12-24 | Ishikawajima Harima Heavy Ind Co Ltd | Production of lining pipe |
| FR3064039B1 (en) * | 2017-03-20 | 2019-04-19 | Saipem S.A. | METHOD FOR SHAPING A STEEL DRIVE FOR THE UNDERWATER TRANSPORT OF FLUIDS |
-
1984
- 1984-04-18 JP JP7666484A patent/JPS60222682A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2760352C1 (en) * | 2021-03-18 | 2021-11-24 | Акционерное Общество "Наука И Инновации" | Method for forming anti-corrosive coating on the shaped surface of a product of structural steel of perlite class |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60222682A (en) | 1985-11-07 |
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