JPS60260789A - Method of welding and joining inner-surface lining steel pipe - Google Patents
Method of welding and joining inner-surface lining steel pipeInfo
- Publication number
- JPS60260789A JPS60260789A JP11525984A JP11525984A JPS60260789A JP S60260789 A JPS60260789 A JP S60260789A JP 11525984 A JP11525984 A JP 11525984A JP 11525984 A JP11525984 A JP 11525984A JP S60260789 A JPS60260789 A JP S60260789A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- ring body
- joined
- tube
- expanded
- 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)
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】
この発明は、強度的にすぐれ、かつ防食性、耐摩耗性の
点でも高性能を発揮する継手部が得られるライニング鋼
管の溶接接合方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for welding and joining lined steel pipes, which provides a joint that is excellent in strength and exhibits high performance in terms of corrosion resistance and wear resistance.
ライニング鋼管の接合は、当初、第3図に示すようなフ
フンジ接合によっていたが、この方式は漏洩の懸念をど
うしても排除できず地下埋設配管には事実上適用は不可
能である。したがって近年、溶接による接合方式が注目
され、そのような方式について種々の提案が出されてき
た。そのいくつかを代表例として挙げれば次のとおシで
ある。Initially, the lining steel pipes were joined by a round joint as shown in Figure 3, but this method cannot eliminate the risk of leakage and is virtually impossible to apply to underground piping. Therefore, in recent years, joining methods by welding have attracted attention, and various proposals have been made regarding such methods. Some representative examples are as follows.
1)第4図に示すように、大径部と小径部をもつ接合部
材0のを被接合管(1) (1)のそれぞれの端部外局
面に溶接付けして、被接合!(11(1)をライニング
層(5)(5)を挾んで対向させた状態でその接合部材
01)0υの大径端どうしを突合せ溶接して接合する方
法。橋型継手と呼ばれる。1) As shown in Fig. 4, weld the joining member 0, which has a large diameter part and a small diameter part, to the outer surface of each end of the pipes (1) to be joined (1), and then weld them! (11(1) is placed facing each other with the lining layers (5) (5) in between, and the joining member 01) is a method of joining by butt welding the large diameter ends of 0υ. It is called a bridge type joint.
11)第5図に示すように、被接合管(1)(1)のそ
れぞれの端部にレジューサ(イ)の突合せ溶接によυ拡
管部を付与し、その拡管部の内腔に断熱材α■を充填し
てフイニング(5)を行い、拡管部どうしを突合せ溶接
する方法。11) As shown in Fig. 5, an expanded tube portion is provided at each end of the pipes to be welded (1) (1) by butt welding with a reducer (A), and a heat insulating material is placed in the inner cavity of the expanded tube portion. A method of filling α■, finning (5), and butt welding the expanded tube parts together.
111)第6図に示すように、被接合管(1)(1)に
端部の所要範囲を残して内面フィニング(5)を施して
おき、この両管どうしを突合せ溶接により接合後、その
未フイニング部(5)に加熱手段α弔を対応させて、透
孔Q6f!0注入した樹脂を硬化させる補修ライニング
を行う方法。111) As shown in Fig. 6, the inner surface fining (5) is applied to the pipes to be joined (1) (1) leaving the required range at the ends, and after joining these two pipes by butt welding, By matching the heating means α to the unfined portion (5), a through hole Q6f! A method of performing repair lining by curing the injected resin.
IV) 第7図に示すように、被接合管(1)(1)の
端部を拡管して、その拡管部αQ0・内面に不錆性金属
板αηを内張シした当板(リング状)Ql19を当接対
応させた上で、管端部どうしを突合せ溶接し、しかるの
ち不錆性金属板αηと既設内面フィニング(5)(5)
との間の隙間000すに塗装を施す。IV) As shown in Fig. 7, the end of the pipe to be joined (1) (1) is expanded, and the expanded part αQ0 and inner surface are lined with a rust-proof metal plate αη (ring-shaped). ) After matching Ql19, butt weld the pipe ends, and then attach the rust-proof metal plate αη and the existing inner fining (5) (5)
Paint the gap 000 between.
ところがかかる従来法は、何れもそれぞれに問題があり
、笑用上十分なものではない。すなわち、■)第4図に
示した1)の方法は、接合部材aηが管fl)(1)の
外面に、いわゆる隅肉浴接にて固定されることになるた
め、その接合部位の強度に不安がある。それに、接合部
材0ηαηの溶接が被接合管(1)(1)そのものから
離れた位置で行われるとは云え、その溶接のヌパツタが
管突合せ位置で管端間に折シ込んだ形のライニング部(
5!i)(5a)に損傷を与える危険が依然としてあり
、しかも同郡のフィニングの突合せシール性が損われる
と、管内流体が外部に洩れ管端からのフイニングの剥離
や管自体の腐食を招く結果となる。However, all of these conventional methods have their own problems and are not practical enough. In other words, ■) In the method 1) shown in Fig. 4, the joining member aη is fixed to the outer surface of the pipe fl) (1) by so-called fillet welding, so the strength of the joining part is low. I have anxiety about this. In addition, although welding of the joining member 0ηαη is performed at a location away from the pipes to be joined (1) (1), the welding welding part is folded between the pipe ends at the pipe butting position, which is the lining part. (
5! i) There is still a risk of damage to (5a), and if the butt sealing properties of the finings in the same group are impaired, the fluid inside the pipe may leak to the outside, resulting in separation of the finings from the pipe ends and corrosion of the pipe itself. Become.
■)第5図に示した11)の方法は、拡管部内の断。■) Method 11) shown in Fig. 5 involves cutting the inside of the expanded tube.
熱材α■とその内側のフイニング(5)間の密着性並び
に−Fイニングの突合せシール性にも鄭があシ、管内流
体の漏洩を防ぎきれない。The adhesion between the heat material α■ and the fining (5) inside it, as well as the butt sealing property of the -F lining, are also poor, making it impossible to prevent leakage of the fluid in the pipe.
恥 第6図に示した111)の方法でも、現実には管接
合後の補修フイニングの施工が困難であり、またその補
修部のりイニングは密着性の点で信頼がおけない。Even with method 111) shown in Fig. 6, it is actually difficult to apply repair fining after pipe joining, and the gluing of the repaired part is not reliable in terms of adhesion.
W) 第7図に示し1lv)の方法も、管接合後の内面
塗装は手間がかかる許りか、得られる被覆も信頼性に乏
しい。W) In the method of 1lv) shown in FIG. 7, painting the inner surface after joining the tubes is time-consuming, and the resulting coating is also poor in reliability.
〈発明の目的〉
本発明は、すぐれた強度を備え、かつ管の接合溶接の影
響による内面フィニングの劣化がなく、防食性、耐摩耗
性の点では原管部に勝るとも劣らない性能を発揮する継
手部を安定的に得ることができ、しかも面倒な内面フィ
ニングの爾後補修を要さず低コヌトな内面ライニング鋼
管の溶接接合方法を提供しようとするものである。<Objective of the Invention> The present invention has excellent strength, does not cause deterioration of the inner fining due to the effects of pipe joining welding, and exhibits performance comparable to that of the original pipe in terms of corrosion resistance and wear resistance. To provide a welding method for welding inner-lined steel pipes, which can stably obtain a joint portion with a lining, which requires no troublesome subsequent repair of the inner-surface fining, and which has a low cost.
〈発明の構成〉 本発明の要旨とするところは、次の■、■にある。<Structure of the invention> The gist of the present invention lies in the following (1) and (2).
■ 内被接合管の端部に拡管部を付与し、その両波管部
のそれぞれに内径が原管部と略々間等のリング体を内挿
しその一端を拡管部の傾斜部内面に溶接付けして、両波
管部の突合せ状態でそのリング体どうしが拡管部の突合
せ位置から管軸方向に所要距離離れたところで一定の間
隔をおいて対向しかつ拡管部内面との間に所定の空間を
形成するようなし、次いでそのような内被接合管にそれ
ぞれ原管部内面、リング体内面およびその解放側端部を
連続被覆するようにライニングを施し、その上で前記両
リング体の解放側端部どうしをライニング層を挾んで対
応させた状態で両波g部どうしを突合せ溶接して接合し
、しかるのち予め設けておいた注入孔から拡管部とリン
グ体間の空間に樹脂を注入シ充填して、その注入孔に栓
をすることを特徴とする方法。■ Add an expanded tube to the end of the inner sheathed tube, insert a ring body into each of the two corrugated tube portions with an inner diameter approximately between that of the original tube, and weld one end of the ring to the inner surface of the sloping portion of the expanded tube. When the two wave tube sections are butted, the ring bodies face each other at a certain distance in the tube axis direction from the abutting position of the expanded tube section, and have a predetermined distance between them and the inner surface of the expanded tube section. Then, a lining is applied to each inner sheathed tube so as to continuously cover the inner surface of the original tube part, the inner surface of the ring body, and the release side end thereof, and then the release of both ring bodies is applied. With the side ends aligned with each other with the lining layer in between, the G parts of both waves are butt-welded and joined together, and then resin is injected into the space between the expanded tube part and the ring body through the injection hole prepared in advance. A method characterized by filling the injection hole with a plug and plugging the injection hole.
■ 上記■の方法において、使用するリング体を1つに
し、片側の被接合管の拡管部にのみリング体を内挿設置
し、この先端を他側の拡管部の傾斜部に対応式せて両波
管部どうしを突合せ溶接することとした方法。■ In method (■) above, only one ring body is used, and the ring body is inserted and installed only in the expanded tube part of the tube to be joined on one side, and its tip is placed correspondingly on the sloped part of the expanded tube part on the other side. A method in which both wave tube sections are butt welded together.
すなわち本発明の方法は、第3図に示したようにレジュ
ーサ状の接合部材αηを使用する、いわゆる橋型継手方
式を改良したもので、[F]強度確保のために、接合部
材の管外周面への隅肉浴接付けをやめて、管端部に拡管
部を与えその拡管部の内側に別途管内面形成材としてリ
ング体を設けることとした、■上記リング体のライニン
グの合せ目を管接合溶接位置から管軸方向にずらせて、
その溶接の影善を避けるようにした、■更にそのライニ
ングの合せ目からの管内流体の漏洩を防ぐため、リング
体外側の拡管部との空間に樹脂を充填することとした、
以上がその大きな改良点と々っている。In other words, the method of the present invention is an improvement on the so-called bridge type joint method that uses a reducer-like joining member αη as shown in FIG. Instead of attaching the fillet bath to the surface, we decided to provide an enlarged part at the end of the pipe and separately provide a ring body inside the enlarged part as a material for forming the inner surface of the pipe. Shift it in the direction of the pipe axis from the joint welding position,
In order to avoid the negative effects of welding, ■Furthermore, in order to prevent the fluid inside the pipe from leaking from the joint of the lining, we filled the space between the expanded pipe part on the outside of the ring body with resin.
The above are some of the major improvements.
〈実施例〉
以下、本発明の接合方法を図面を参照に、具体的かつ詳
細に説明する。<Example> Hereinafter, the joining method of the present invention will be described in detail with reference to the drawings.
第1図は、本発明の接合方法の一つを示す上半部縦断側
面図で、同図は接合を完了した継手部を示す。図におい
て、(1)(1)は被接合管、 (21(2)はその接
合端部に付与した拡管部、(3)(8)は内径が被接合
管の原管部(拡管部以外の部分)(4)に略々一致する
リング体、(5)は樹脂ライニング、(6)は充填樹脂
、である。FIG. 1 is a vertical cross-sectional side view of the upper half showing one of the joining methods of the present invention, and this figure shows a joint portion that has been joined. In the figure, (1) (1) is the pipe to be joined, (21 (2) is the expanded part attached to the joined end, and (3) and (8) is the original part of the pipe to be joined (other than the expanded part). (4) is the ring body, (5) is the resin lining, and (6) is the filled resin.
すなわち本発明の方法では、次のようにして管の接合が
行われる。That is, in the method of the present invention, pipes are joined as follows.
■ まず被接合W (t) (1)の接合しようとする
端部に拡管部(2)(2〕を与える。拡管部を与える手
段としては、油圧等によシ径が拡縮する構造をもつ芯金
を管端部内にセットして押し拡げるのが一般である。こ
の場合の拡管率、拡管部の長さとしては、熱論使用条件
、菅条件によって違ってくるが、大体拡管率5〜15%
、拡管部の長で(傾斜部(2a)含む)150〜aoo
m程度が適当であろう。なお適用対象はシームレス管、
電縫管など、何れでもよい。電縫管の場合には、電縫部
のシームアニール、拡管による管長変化や減肉、真円度
といった点によく注意しなければならない。■ First, provide an expanded tube portion (2) (2) to the end of the W (t) (1) to be joined.As a means for providing the expanded tube portion, use a structure in which the diameter of the tube expands and contracts using hydraulic pressure, etc. Generally, the core metal is set inside the tube end and expanded by pushing.In this case, the tube expansion rate and the length of the tube expansion section vary depending on the thermal conditions of use and tube conditions, but the tube expansion rate is generally 5 to 15. %
, the length of the expanding part (including the inclined part (2a)) is 150~aoo
A value of about m would be appropriate. Applicable to seamless pipes,
Any material such as electric resistance welded pipe may be used. In the case of electric resistance welded pipes, careful attention must be paid to seam annealing of the electric resistance welded portion, changes in tube length due to tube expansion, thinning, and roundness.
拡管部を与える方法としては、上記拡管操作の他に、レ
ジューサを用いる方法の採用が許される。との方法の場
合には、使用するレジューサを小径側端部の内・外径が
被接合管の内・外径と同じものとして、レジューサの取
付は金管端への突合せ溶接によシ行うようにすることが
肝心である。これは、継手強度の意味において、欠いて
はならない条件である。In addition to the tube expansion operation described above, a method using a reducer may be used as a method for providing the tube expansion portion. In the case of method 2, the reducer to be used should have the same inner and outer diameters as the inner and outer diameters of the pipe to be joined, and the reducer should be attached by butt welding to the end of the brass pipe. It is important to do so. This is an essential condition in terms of joint strength.
■ このような拡管部(2)(2)に次いで、リング体
(3) (8’)を内挿し固定する。リング体(3)
(8’)は何れも、内径0.)は原管部(4)の内径何
と同等乃至は稍々大きい程度とし、一端(3a)の外周
縁を面取り状に斜め切シしこの面(3b)を拡管部の、
原管部に続く傾斜部(か只2a)の内面に突き当てて、
その端面(30)と傾斜部内面とを内側がら周溶接して
固定する。溶接部(7)はグフィンダ等にょシ平滑に仕
上げる。(2) Next to the expanded tube portions (2) (2), the ring bodies (3) (8') are inserted and fixed. Ring body (3)
(8') has an inner diameter of 0. ) is the same as or slightly larger than the inner diameter of the original tube part (4), the outer peripheral edge of one end (3a) is cut diagonally into a chamfer shape, and this surface (3b) is used as the expanded tube part.
Abut against the inner surface of the inclined part (Katada 2a) following the original tube part,
The end face (30) and the inner surface of the inclined portion are circumferentially welded from the inside to be fixed. The welded part (7) should be finished smooth with a rough finish.
ここに、リング体(3)(+)の長さくイ)(1)とし
ては、同一とせずに互いに異ならしめることが重要であ
る。すなわち、両波管部(21(2)の突合せ状態でリ
ング体(3)(3)どうしが拡管部突合せ位置(4)か
ら管軸方向に外れ友ところで一定間隔をおいて対向する
ようにする。リング体(3)(8)間の間隔とは、後述
するライニングの折れ込み部(5a)(5a) ’e介
在させるものである(具体的には8〜1ON$i度)。Here, it is important that the lengths of the ring bodies (3) (+) (a) (1) are different from each other rather than being the same. In other words, when the two wave tube sections (21 (2) are butted together, the ring bodies (3) (3) are separated from the tube expansion section abutting position (4) in the tube axis direction so that they face each other at a certain distance. The distance between the ring bodies (3) and (8) is the distance between the folded portions (5a) and (5a)'e of the lining, which will be described later (specifically, 8 to 1 degrees).
このような構造は、両リング体の対応位置@(ライニン
グの突合せ位置で示す)を拡管部突合せ位置(8)から
遠ざけて、上NlEB位置付近のライニング(折)返し
部)〔5゛原市)がA位置での溶接の影響を受けないよ
うにする意味がある。したがって、Bの位置は、A位置
での溶接に伴うヌバッタを避けられるところに設定され
る。In such a structure, the corresponding position of both ring bodies (indicated by the abutment position of the linings) is moved away from the expanded tube abutment position (8), and the lining (folded) part near the upper NlEB position (5゛Haraichi) It is important to ensure that the welding is not affected by the welding at the A position. Therefore, the position B is set at a location where welding caused by welding at the A position can be avoided.
このような、リング体を組で使用するのとは別に、一つ
だけを使う方法もある。第2図にその例を示す。すなわ
ち、何れか一方の被密接管(υにだけ前記同様にリング
体(3)を取付けるもので、そのリング体(3)F1両
拡管部(21(2)の突合せ状態で他側の被接合管(1
)の前記傾斜部(2a)内面にそれらの間に後述するラ
イニング(5a) (5)を挾む間隔を保持して対向す
るようなす。Apart from using a set of ring bodies like this, there is also a method of using only one ring body. An example is shown in FIG. That is, the ring body (3) is attached to only one of the sealed tubes (υ) in the same manner as described above, and the ring body (3) F1 and both enlarged tube portions (21 (2) are abutted against each other and the other side to be joined Pipe (1
) are arranged so that they face each other with an interval between them to sandwich linings (5a) (5), which will be described later, on the inner surfaces of the inclined parts (2a).
第1図、第2図何れの場合にも、リング体(3)(8’
)または(3)と開拡管部(21(2)との間には周方
向に連続する空間(財)が形成されることになる。In both cases of Fig. 1 and Fig. 2, the ring body (3) (8'
) or (3) and the expanded pipe portion (21(2)), a space (good) that continues in the circumferential direction is formed.
また、拡管部(2+(2)の何れかに前記空間(財)に
通じる孔(8)を最低二つ設ける。これは管接合後学間
(財)に樹脂を注入するだめのもので、樹脂注入後確実
に閉塞してしまえるよう、テーパねじを切ってプラグ(
9)で栓ができるようにしておく。なお、この孔あけ作
業は、上記リング体の取付けの前でも、後でもよい。In addition, at least two holes (8) communicating with the space (goods) are provided in either of the pipe expansion parts (2+(2)).These are for injecting resin into the space (goods) after the pipes are joined. After resin injection, cut the taper thread and attach the plug (
Step 9) to make a stopper. Note that this drilling work may be performed before or after the attachment of the ring body.
■ このようにした被接合管に次いで、ライニングを施
す。ライニング(5)は、第1図の場合には、何れの被
接合管も、原管部(4)内面からリング体(3)内面、
更には解放側端〔3a〕(以下、先端とする)で外側に
折れ込んで外面側に折シ返された形でリング先端部まで
を連続被覆するように設けられる。■ Next, apply lining to the pipe to be joined in this way. In the case of Fig. 1, the lining (5) extends from the inner surface of the original tube part (4) to the inner surface of the ring body (3) for any pipe to be joined.
Furthermore, the ring is provided so that it is folded outward at the open end [3a] (hereinafter referred to as the tip) and folded back toward the outer surface so as to continuously cover the tip of the ring.
第2図の場合、リング体(3)付の方は上記と同様であ
るが、他方は原管部(4)、それに拡管部の傾斜部(2
a)の、リング体対向位置までを被覆するように設ける
。ライニングのリング体先端(3d)側での折シ返し部
(5b)のヌトッパーとして、輪状のカラー01を付設
してもよい。なお、ライニング樹脂としては、現在知ら
れる何れの使用も許される。すなワチ、例を挙げれば、
タールエポキシ、エポキシ。In the case of Fig. 2, the one with the ring body (3) is the same as above, but the other is the original pipe part (4), and the inclined part (2) of the expanded pipe part.
It is provided so as to cover up to the position facing the ring body in a). A ring-shaped collar 01 may be attached as a nutopper of the folded part (5b) on the ring body tip (3d) side of the lining. Note that any currently known lining resin may be used. For example,
Tar epoxy, epoxy.
ポリウレタンエフストマー、天然ネオプレンゴム。Polyurethane fstomer, natural neoprene rubber.
ポリエチレン、塩ビ、ナイロン等々、である。These include polyethylene, PVC, nylon, etc.
以上は予め工場において実施しておくものである。The above steps are carried out in advance at the factory.
■ 現地においては、組の被接合管(1)(1)の拡管
部(2H2)どうしを突合せ溶接して接合する。溶接に
当っては、第1図に示すように内部のリング体(3)(
8)どうしが、或いは第2図に示すようにリング体(3
)と他側拡管部の傾斜部(2a)内面とが、前記ライニ
ング(5a)(5a)或いは(5a)(5)を挾んで対
応するように位置決めする。この際、そのライニング間
のシール性を保つように互いに圧接し合う傾向をもたせ
るようにする。■ At the site, the expanded portions (2H2) of the pipes to be joined (1) (1) are butt-welded to each other. During welding, as shown in Figure 1, the inner ring body (3) (
8) Ring bodies (3) as shown in Figure 2.
) and the inner surface of the inclined part (2a) of the other side expanded tube part are positioned so that they sandwich and correspond to the lining (5a) (5a) or (5a) (5). At this time, the linings are made to have a tendency to come into pressure contact with each other so as to maintain sealing properties between the linings.
このような溶接を実施しても、ライニングの前記折シ返
し部(5a)は、溶接位置(6)に対する管軸方向への
位置ずれによルその影響を全く受けないですむ。Even when such welding is performed, the folded portion (5a) of the lining is not affected by any displacement in the tube axis direction with respect to the welding position (6).
■ 溶接が終れば、最後に、拡管部に設けておいた孔(
83(8)を、プラグ(9)(9)を外して開放し、そ
の片方の孔から、空間(財)に樹脂を注入、充填する。■ After welding is completed, the hole (
83 (8) is opened by removing the plug (9) (9), and resin is injected into the space (goods) from one of the holes to fill it.
この際他方の孔は空気抜きとして機能させるものである
ことは云う迄もない。充填する樹脂としては、注入可能
な粘度をもちかつ常温で硬化するタイプの、例えば常温
硬化型ポリウレタン樹脂等を使用する。In this case, it goes without saying that the other hole functions as an air vent. As the resin to be filled, a type that has an injectable viscosity and hardens at room temperature, such as a room temperature curing polyurethane resin, is used.
樹脂注入後、両方の孔(8)(8)にプラグ(9)(9
)を締付は固定して、接合は完了である。After resin injection, insert plugs (9) (9) into both holes (8) (8).
) is tightened and fixed, and the joining is completed.
〈発明の効果〉
以上のような本発明の方法によれば、次に示す特徴、利
点をもつ継手を実現できるものである。<Effects of the Invention> According to the method of the present invention as described above, a joint having the following features and advantages can be realized.
1〕 溶接構造本来のすぐれた耐圧強度を備え、フラン
ジ接合等の継手では不可能だった埋設施工が可能である
。1) It has excellent pressure resistance inherent to a welded structure, and can be buried underground, which is impossible with joints such as flange joints.
11)管軸方向の力を従来の橋型継手のように隅肉溶接
部で受ける形にならず、その橋型継手と比較すると曲げ
、引張夛等の外力に対し通かに強い。11) Unlike conventional bridge-type joints, the force in the pipe axis direction is not received at the fillet weld, and compared to bridge-type joints, it is much more resistant to external forces such as bending and tension.
111)内面ライニングに管接合溶接の影響がなく、し
かも管内面形成部材として0リング体の周囲、拡管部と
の間に樹脂が充填されていて、防食性、耐摩耗性の点に
おいてはむしろ原管部を凌ぐほどの性能を発揮する。111) The inner lining is not affected by pipe joint welding, and resin is filled around the O-ring body and between the tube expansion part as a member for forming the inner surface of the tube, so it is rather original in terms of corrosion resistance and wear resistance. Demonstrates performance that surpasses that of the pipe section.
Iv)従来のフランジやビクトリック等によるものに較
ベコスト的に有利であるのみならず、現地においては溶
接の外は特段の技術を要さない樹脂の注入を行うだけで
よく、施工はきわめて容易である。Iv) Not only is it advantageous in terms of cost compared to conventional flanges and Victoriques, etc., but it is extremely easy to install on-site, as it only requires resin injection, which requires no special skills other than welding. It is.
■)継手部の外面防食対策の実施が容易である。■) It is easy to implement anti-corrosion measures on the external surface of the joint.
したがって本発明は、内面ライニング鋼管の継手性能の
向上、施エコヌトの低減等に多大に寄与する。Therefore, the present invention greatly contributes to improving the joint performance of internally lined steel pipes, reducing the cost of fitting, etc.
Claims (2)
はレジューサの突合せ溶接による取付けで拡管部を与え
、その開拡管部にそれぞれ内径が被接合管の原管部と略
々間等のリング体を内挿しその一端を前記拡管部の傾斜
部内面に溶接付けして、開拡管部の突合せ状態でそのリ
ング体どうしが拡管部突合せ位置から管軸方向に所要距
離離れたところで一定の間隔をおいて対向しかつ拡管部
内面との間に所定の空間を形成するようなし、次いでそ
のような両波接合管にそれぞれ原肯部内面、リング体内
面およびその解放側端部を連続被覆するようにライニン
グを施し、その上で前記両リング体の解放側端部どうし
をライニング層を挾んで対応させた状態で開拡管部どう
しを突合せ溶接して接合し、しかるのち予め設けておい
た注入孔から拡管部とリング体間の空間に樹脂を注入、
充填して、その注入孔に栓をすることを特徴とする内面
ライニング鋼管の溶接接合方法。(1) Provide an expanded section at the ends of the two steel pipes to be joined by expanding the pipe or attaching a reducer by butt welding, and attach a ring to each expanded section with an inner diameter approximately between that of the original pipe of the pipe to be joined. Insert the ring body and weld its one end to the inner surface of the inclined part of the tube expansion part, and when the expansion tube parts are abutted, the ring bodies are spaced a certain distance from each other at a required distance in the tube axis direction from the butt position of the expansion tube part. The inner surface of the original part, the inner surface of the ring body, and the open end thereof are continuously coated on such double-wave joint pipes, respectively. Then, the open ends of both ring bodies are butt-welded and joined to each other with the lining layer sandwiched between the open ends of the ring bodies, and then the injection holes prepared in advance are connected. Inject resin into the space between the tube expansion part and the ring body.
A method for welding and joining inner-lined steel pipes, characterized by filling the injection hole and plugging the injection hole.
はレジューサの突合せ溶接による取付けで拡管部を与え
、その一方の拡管部に内径が被接合管の原管部の内径と
略々間等のリング体の一端側を内挿しその挿入端を前記
拡管部の傾斜部内面に溶接付けして、開拡管部の突合せ
状態でそのリング体が他側の被接合管の傾斜部内面に所
要の間隔をおいて対向しかつ両拡背部内面との間に所定
の空間を形成するようなし、次いでその両波接合管に、
前記リング体付の方は原管部内面、リング体内面および
その解放側端部を連続被覆するように、また他方は前記
傾斜部のリング体対向部位までを含めて原管部内面を被
覆するように、それぞれライニングを施し、その上で前
記リング体を他側の傾斜部内面にライニング層を介して
対応させた状態で開拡管部どうしを突合せ溶接して接合
し、しかるのち予め設けておいた注入孔から開拡管部と
リング体間の空間に樹脂を注入、充填して、その注入孔
に栓をすることを特徴とする内面ライニング鋼管の溶接
接合方法。(2) Provide an expanded section at the ends of both steel pipes to be joined by expanding the pipe or attaching a reducer by butt welding, and make sure that the inner diameter of one of the expanded sections is approximately equal to the inner diameter of the original pipe of the pipe to be joined. One end of the ring body is inserted and its insertion end is welded to the inner surface of the sloped part of the pipe to be joined, and when the expanded pipe parts are abutted, the ring body is attached to the inner surface of the sloped part of the pipe to be joined on the other side as required. facing each other with an interval and forming a predetermined space between the inner surfaces of both widened back parts, and then the double-wave jointed pipe,
The one with the ring body continuously covers the inner surface of the original tube, the inner surface of the ring body, and the open end thereof, and the other one covers the inner surface of the original tube including the part of the slope facing the ring body. Then, with the ring body corresponding to the inner surface of the inclined part on the other side via the lining layer, the expanded pipe parts are butt welded and joined together, and then the pipe parts prepared in advance are A method for welding and joining inner-lined steel pipes, which comprises injecting and filling the space between the expanded pipe section and the ring body with resin through the injection hole, and plugging the injection hole.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11525984A JPS60260789A (en) | 1984-06-05 | 1984-06-05 | Method of welding and joining inner-surface lining steel pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11525984A JPS60260789A (en) | 1984-06-05 | 1984-06-05 | Method of welding and joining inner-surface lining steel pipe |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS60260789A true JPS60260789A (en) | 1985-12-23 |
JPH0423154B2 JPH0423154B2 (en) | 1992-04-21 |
Family
ID=14658245
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11525984A Granted JPS60260789A (en) | 1984-06-05 | 1984-06-05 | Method of welding and joining inner-surface lining steel pipe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60260789A (en) |
-
1984
- 1984-06-05 JP JP11525984A patent/JPS60260789A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPH0423154B2 (en) | 1992-04-21 |
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