JPH074386Y2 - Electrically insulated pipe fittings for water - Google Patents
Electrically insulated pipe fittings for waterInfo
- Publication number
- JPH074386Y2 JPH074386Y2 JP1989046002U JP4600289U JPH074386Y2 JP H074386 Y2 JPH074386 Y2 JP H074386Y2 JP 1989046002 U JP1989046002 U JP 1989046002U JP 4600289 U JP4600289 U JP 4600289U JP H074386 Y2 JPH074386 Y2 JP H074386Y2
- Authority
- JP
- Japan
- Prior art keywords
- joint body
- pipe
- female thread
- outer joint
- assembly
- 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 - Lifetime
Links
Landscapes
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Description
本考案は主として水用配管に使用される内面樹脂ライニ
ング鋼管と銅合金製の配管部品等との接続に使用する電
気絶縁性の管継手に関するものである。The present invention relates to an electrically insulating pipe joint mainly used for connecting an inner resin lined steel pipe used for water pipes and a copper alloy pipe component.
水用の配管では、銅合金製の給水栓と鋳鉄製管継手とを
接続すると、その接続部では銅合金と鋳鉄との異種金属
が接触するので、使用中に電池作用に起因する電食が起
こる。そこでこの接続部を電気的に絶縁する管継手とし
て実開昭63−129785号公報で開示された管継手がある。 このものは第6図で示すように、略円筒状で一端部内周
面に管用めねじ71と他端部内周面にめねじ72とを有する
鋳鉄製継手本体70に、管用めねじ71を除く内周面にライ
ニングした樹脂被覆部80を形成し、めねじ72を被覆した
内周面に樹脂被覆部80による管用めねじ81を設けると共
に管用めねじ71側に管用めねじ71と間隙を設けて樹脂被
覆部80による円筒部分83を一体に形成したものである。
そして継手本体70の内面に設けた内面樹脂被覆部80によ
る管用めねじ81によって、管用めねじ71と管用めねじ81
に接続した配管間が絶縁されるようにしたものである。In piping for water, when connecting a copper alloy water tap and a cast iron pipe fitting, different metals of the copper alloy and cast iron come into contact at the connection portion, so electrolytic corrosion caused by the battery action during use may occur. Occur. Therefore, as a pipe joint for electrically insulating this connecting portion, there is a pipe joint disclosed in Japanese Utility Model Laid-Open No. Sho 63-129785. As shown in FIG. 6, this is a cast iron joint main body 70 having a substantially cylindrical shape and having a female thread 71 for pipe on the inner peripheral surface of one end and a female thread 72 on the inner peripheral surface of the other end, except for the female thread 71 for pipe. A resin coating portion 80 lined on the inner peripheral surface is formed, and a female thread 81 for a pipe formed by the resin coating portion 80 is provided on the inner peripheral surface coated with the female thread 72, and a gap is formed between the female thread 71 for the pipe and the female thread 71 for the pipe. Thus, the cylindrical portion 83 made of the resin coating portion 80 is integrally formed.
Then, the internal thread 81 for the pipe and the internal thread 81 for the pipe are formed by the internal thread 81 for the internal surface resin coating portion 80 provided on the inner surface of the joint body 70.
It is designed to insulate between the pipes connected to.
しかしながら上記従来の管継手は、銅合金製の配管部品
等と接続する管用めねじ81は樹脂製ねじのため、ねじの
強度が弱く、銅合金製のおねじが強くねじ込まれると樹
脂製めねじ81が破壊して接続出来なかったり、この接続
部で漏れが発生する問題があった。 そこで本考案は、内面樹脂ライニング鋼管と銅合金製配
管部品等との異種金属配管間の絶縁を果たして異種金属
接触による腐食を防止し、内部流体からも遮断して防食
すると共に、配管接続上も問題なく接続出来る水配管用
の電気絶縁性管継手を提供するものである。However, in the above-mentioned conventional pipe joint, the female thread 81 for pipes connected to the copper alloy piping parts, etc. is a resin thread, so the strength of the thread is weak, and when the male thread made of copper alloy is strongly screwed in, the female thread made of resin is There was a problem that 81 was destroyed and could not be connected, or leakage occurred at this connection part. Therefore, the present invention achieves insulation between dissimilar metal pipes such as the inner surface resin-lined steel pipe and copper alloy pipe parts, etc. to prevent corrosion due to contact with dissimilar metals and to block corrosion from internal fluids as well as to prevent pipe connection. An electrically insulating pipe joint for water pipes that can be connected without any problem.
本考案の要旨は、略円筒形状で、一端部に樹脂ライニン
グ鋼管と接続する管用めねじを有し他端部に組立用のめ
ねじを有する鋳鉄製の外側継手本体と、 略円筒状で、一端部の外周面に平滑部と前記外側継手本
体の組立用めねじに螺合する組立用おねじと組立用おね
じに続いて軸直角方向の側面とを有し、他端部に配管器
具と接続する管用ねじを有する前記外側継手本体とは異
種金属の銅合金製内側継手本体と、 前記外側継手本体の管用めねじと組立用めねじとを除く
内周面を樹脂で被覆すると共に前記内側継手本体の平滑
部に周方向重なる平滑内周面を有した内面被覆部と、こ
の内面被覆部から前記管用めねじ側に延出して前記接続
するライニング鋼管の内周面を覆う円筒部とを有する内
面樹脂被覆層と、 前記外側継手本体の組立用めねじと前記内側継手本体の
組立用おねじとの少なくとも何れかの表面に樹脂をコー
テイングした電気絶縁層と、 前記電気絶縁層をコーテイングしたねじと該ねじに螺合
するねじとを接着すると共に内側継手部材と内面被覆部
とを接着する接着剤層と、 前記外側継手本体の組立用めねじ側端面と前記内側継手
本体の側面との間で挟着される電気絶縁性材料の環状リ
ングとからなり、 前記外側継手本体と内側継手本体とを接着剤層で螺着結
合することにより、前記環状リングが外側継手本体の端
面と内側継手本体の側面とで挟着され接着剤層によって
密封固定されると共に、内部流通水から外側継手本体の
内面が内面樹脂被覆層と内側継手本体と接着剤層とによ
って連続して覆われ遮断されることを特徴とする水用電
気絶縁管継手である。The gist of the present invention is a substantially cylindrical shape, an outer joint body made of cast iron having a female thread for a pipe connected to a resin-lined steel pipe at one end and an assembling female thread at the other end, and a substantially cylindrical shape, The outer peripheral surface of one end has a smooth portion, an external thread for assembling into the internal thread for assembling the outer joint body, and an external thread for assembly followed by a side surface in the direction perpendicular to the axis. The inner joint body made of a copper alloy of a dissimilar metal and the outer joint body having a pipe thread to be connected to the inner joint surface of the outer joint body excluding the pipe female thread and the female thread for assembly are covered with a resin. An inner surface covering portion having a smooth inner peripheral surface that circumferentially overlaps with a smooth portion of the inner joint body, and a cylindrical portion extending from the inner surface covering portion to the female thread side for the pipe and covering the inner peripheral surface of the connecting lining steel pipe. A resin coating layer having an inner surface, and an internal thread for assembling the outer joint body An electrical insulating layer coated with resin on at least one surface of the male thread for assembling the inner joint body, a screw coated with the electrical insulating layer, and a screw threaded to the screw, and an inner joint member An adhesive layer for adhering the inner surface and the inner surface covering portion, and an annular ring of an electrically insulating material sandwiched between the female thread side end surface for assembly of the outer joint body and the side surface of the inner joint body, By screwing and coupling the outer joint body and the inner joint body with an adhesive layer, the annular ring is sandwiched between the end surface of the outer joint body and the side surface of the inner joint body and hermetically fixed by the adhesive layer. An electrically insulating pipe joint for water, characterized in that the inner surface of the outer joint body is continuously covered and shielded from the internal circulating water by the inner surface resin coating layer, the inner joint body and the adhesive layer.
本考案は上記の構成であるから、外側継手本体の管用め
ねじに接続するライニング鋼管と内側継手本体に接続す
る銅合金製の配管部品とは、内外両継手本体の組立用ね
じの何れかにコーテイングした電気絶縁層によって電気
的に絶縁される。 また外側継手本体の組立側端面と内側継手本体の側面と
の間で電気絶縁性材料の環状リングが挟着されて接着剤
で密封固定されるので、内外継手本体の螺着結合部が外
部の腐食環境から遮断され、絶縁が保たれる。 更にライニング鋼管の内面が内面樹脂被覆層の円筒部で
覆われ、内側継手本体の平滑部とこれに周方向重なる内
面被覆部の平滑内周面とが接着剤層で密封されて内面樹
脂被覆層と内側継手本体とが連続して覆われるので、接
続したライニング鋼管の端面や外側継手本体も内部の流
通水から遮断され、防食される。 また配管と接続する外側継手本体と内側継手本体の管用
ねじの材質は、配管と同じ種類の金属製ねじであり、両
接続ねじの強度も十分あり、ねじ込み接続上何ら問題な
く配管接続することが出来る。Since the present invention has the above-mentioned configuration, the lining steel pipe connected to the female thread for pipe of the outer joint body and the copper alloy pipe part connected to the inner joint body are connected to either of the inner and outer joint body assembly screws. It is electrically insulated by the coated electrically insulating layer. Further, since the annular ring of the electrically insulating material is sandwiched between the assembly side end surface of the outer joint body and the side surface of the inner joint body and hermetically fixed with the adhesive, the threaded joint portion of the inner and outer joint body is connected to the outside. Shields from corrosive environments and maintains insulation. Further, the inner surface of the lining steel pipe is covered with the cylindrical portion of the inner surface resin coating layer, and the smooth portion of the inner joint main body and the smooth inner peripheral surface of the inner surface coating portion that overlaps the inner surface of the inner joint body are sealed with an adhesive layer to form an inner resin coating layer. Since the inner joint body and the inner joint body are continuously covered, the end surface of the connected lining steel pipe and the outer joint body are also shielded from the circulating water in the interior to prevent corrosion. In addition, the material of the pipe thread of the outer joint body and the inner joint body that is connected to the pipe is the same type of metal screw as the pipe, both connection screws have sufficient strength, and the pipe connection can be done without any problems in screwing connection. I can.
以下本考案の実施例を図面に基づいて説明する。 第1図は本考案の第1実施例を示す水用電気絶縁管継手
の縦断面図で、第3図ないし第5図は夫々第2実施例な
いし第4実施例を示し、製造手順に従って説明する。 10は外側継手本体で、第1、第2実施例では可鍛鋳鉄製
のねじ込み式ソケット継手を、第3実施例ではエルボ継
手を、第4実施例ではチーズ継手を用いている。この外
側継手本体10の内面に合成樹脂、例えば塩化ビニル樹脂
を射出成型して、配管と接続用の管用めねじ11側に接続
したライニング鋼管の内面を覆う円筒部23と、この円筒
部23と一体で両側の管用めねじ11と組立用めねじ12を除
く中央部の内面を覆う内面被覆部22とを有する内面樹脂
被覆層20を設ける。 30は銅合金製の内側継手本体で、組立側の端部外面に平
滑部と、外側継手本体10の組立用めねじ12に螺合する組
立用おねじ32と、これに続いて軸直角方向の側面331を
有し、他端部は銅合金製の配管器具と接続する管用ねじ
を設けてある。この管用ねじは第1、第3、第4実施例
では管用おねじ31を設け、第2実施例では管用めねじ34
を設けてある。 この内側継手本体30の組立用おねじ32には、エポキシ樹
脂を静電粉体塗装して加熱焼付けした樹脂コーテイング
による電気絶縁層40を設けてある。 このコーテイングによる電気絶縁層40を設けた内側継手
本体30の側面331に電気絶縁材料で形成した環状リング6
0を装着し、組立用おねじ32にエポキシ樹脂接着剤を塗
布して外側継手本体10の組立用めねじ12に螺着し、外側
継手本体10と内側継手本体30との間を電気絶縁状態で結
合している。この絶縁結合部の状態を第2図に示す。 内側継手本体30と外側継手本体10内の樹脂被覆層20との
結合部分は、図示のごとく内側継手本体30の端部外周面
と樹脂被覆層20の内面とで互いに周方向で重なる平滑部
と平滑内周面を形成してあり、内側継手本体30を螺着す
る際、樹脂被覆層20側にはみ出した接着剤がこの平滑部
と平滑内周面を接着すると共に樹脂被覆層20と内側継手
本体3との間を連続して埋めて密封し接着固定する。こ
のため外側継手本体10は内部を通過する流通水とも遮断
されており、流通水と接触しないので外側継手本体10の
腐食がなく、赤水が生じない。尚内側継手本体3は銅合
金製のため流通水と接触しても赤水の問題が生じない。 また内側継手本体30を螺着する際、電気絶縁材料で形成
した環状リング60は外側継手本体10の端面と内側継手本
体30の側面331とによって挟着されると共に、環状リン
グ60側にはみ出した接着剤50によって外側継手本体10と
環状リング60と内側継手本体30とが一体に密封固定され
る。このため外側継手本体10と内側継手本体30とは絶縁
状態で結合され、また環状リング60の挟着によって内外
側継手本体との絶縁結合部が外部環境から遮断されるの
で、外部の腐食水等が絶縁結合部に入らず長期の絶縁性
能が保たれる。An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of an electrically insulating pipe joint for water showing a first embodiment of the present invention, and FIGS. 3 to 5 show second to fourth embodiments, respectively, which will be described according to the manufacturing procedure. To do. Reference numeral 10 denotes an outer joint body, which is a malleable cast iron screw-in type socket joint in the first and second embodiments, an elbow joint in the third embodiment, and a cheese joint in the fourth embodiment. Synthetic resin, for example, vinyl chloride resin is injection-molded on the inner surface of the outer joint body 10, a cylindrical portion 23 that covers the inner surface of the lining steel pipe connected to the pipe and the female thread 11 for pipe connection, and this cylindrical portion 23. An inner surface resin coating layer (20) integrally having an inner surface (22) for pipes on both sides and an inner surface covering portion (22) for covering the inner surface of the central part excluding the assembling screw (12) is provided. Reference numeral 30 denotes an inner joint body made of a copper alloy, a smooth portion on the outer surface of the end portion on the assembling side, an assembling male thread 32 to be engaged with the assembling female thread 12 of the outer joint body 10, and subsequently, a direction perpendicular to the axis. Has a side surface 331 and the other end is provided with a pipe screw for connection with a copper alloy pipe fitting. This pipe screw is provided with a pipe male thread 31 in the first, third and fourth embodiments and is provided with a pipe female screw 34 in the second embodiment.
Is provided. The male screw 32 for assembling the inner joint body 30 is provided with an electric insulating layer 40 by resin coating in which an epoxy resin is electrostatically powder coated and baked. An annular ring 6 made of an electrically insulating material is provided on the side surface 331 of the inner joint main body 30 provided with the electrically insulating layer 40 by this coating.
Install 0, apply epoxy resin adhesive to the male thread 32 for assembly, and screw it to the female thread 12 for assembly of the outer joint body 10, and electrically insulate between the outer joint body 10 and the inner joint body 30. Are joined by. The state of this insulating coupling portion is shown in FIG. The joint portion between the inner joint body 30 and the resin coating layer 20 in the outer joint body 10 is a smooth portion that overlaps with the outer peripheral surface of the end portion of the inner joint body 30 and the inner surface of the resin coating layer 20 in the circumferential direction as illustrated. A smooth inner peripheral surface is formed, and when the inner joint body 30 is screwed, the adhesive protruding to the resin coating layer 20 side adheres the smooth portion and the smooth inner peripheral surface, and the resin coating layer 20 and the inner joint. The space between the main body 3 and the main body 3 is continuously filled, sealed, and adhesively fixed. Therefore, the outer joint body 10 is also blocked from the circulating water passing through the inside, and since it does not come into contact with the circulating water, the outer joint body 10 does not corrode and red water does not occur. Since the inner joint body 3 is made of a copper alloy, the problem of red water does not occur even if it comes into contact with circulating water. Further, when the inner joint body 30 is screwed, the annular ring 60 formed of an electrically insulating material is sandwiched between the end surface of the outer joint body 10 and the side surface 331 of the inner joint body 30 and protrudes toward the annular ring 60 side. The outer joint body 10, the annular ring 60, and the inner joint body 30 are integrally sealed and fixed by the adhesive 50. Therefore, the outer joint body 10 and the inner joint body 30 are coupled in an insulated state, and the insulating joint portion with the inner and outer joint body is shielded from the external environment by sandwiching the annular ring 60, so that external corrosive water, etc. Does not enter the insulation coupling part, and long-term insulation performance is maintained.
以上説明のごとく本考案の水用電気絶縁管継手は、接続
したライニング鋼管の内面が内面樹脂被覆層の円筒部で
覆われ、外側継手本体が内面樹脂被覆層と接着剤層と内
側継手本体とによって連続して覆われるので、接続ライ
ニング鋼管の端面や外側継手本体の内面も内部の流通水
から遮断され、防食される。 また環状リングの挟着によって絶縁螺着結合部が外部湿
気環境から遮断されるので、外部の腐食水等がこの絶縁
結合部に入らず長期の絶縁性能が保たれる。 また配管と接続する外側継手本体と内側継手本体の管用
ねじは、配管と同じ種類の材質の金属製ねじであるから
接続ねじの強度も十分あり、ねじ込み接続強度上も何ら
問題なく確実に配管接続できる。As described above, in the electrical insulation pipe joint for water of the present invention, the inner surface of the connected lining steel pipe is covered with the cylindrical portion of the inner surface resin coating layer, and the outer joint body includes the inner surface resin coating layer, the adhesive layer and the inner joint body. Since it is continuously covered with, the end surface of the connection lining steel pipe and the inner surface of the outer joint body are also shielded from the circulating water in the interior to be protected from corrosion. Further, since the insulating screw-bonded portion is shielded from the external moisture environment by sandwiching the annular ring, external corrosive water or the like does not enter the insulating joint portion, and long-term insulating performance is maintained. In addition, the pipe threads of the outer joint body and inner joint body that are connected to the pipe are metal screws made of the same type of material as the pipe, so the connection screw has sufficient strength, and there is no problem with the screwed connection strength. it can.
第1図は本考案の水用電気絶縁管継手の第1実施例を示
す縦断面図である。 第2図は第1図のおねじ32とめねじ12の螺合部拡大断面
図である。 第3図、第4図、第5図は夫々本考案の水用電気絶縁管
継手の第2、第3、第4実施例を示す縦断面図である。 第6図は従来技術を示す水用絶縁管継手の縦断面図であ
る。 符号の説明 10…外側継手本体、11…配管との接続管用めねじ 12…組立用めねじ、20…内面樹脂被覆層 22…内面被覆部、23…円筒部 30…内側継手本体、31…配管器具との接続用管用おねじ 32…組立用おねじ、33…環状突出部 331…側面、34…配管との接続管用めねじ 40…電気絶縁層、50…接着剤層 60…環状リングFIG. 1 is a longitudinal sectional view showing a first embodiment of the electrical insulation pipe joint for water of the present invention. FIG. 2 is an enlarged sectional view of the threaded portion of the male screw 32 and the female screw 12 of FIG. 3, 4, and 5 are longitudinal sectional views showing second, third, and fourth embodiments of the electrically insulating pipe joint for water of the present invention, respectively. FIG. 6 is a vertical cross-sectional view of a water insulating pipe joint showing a conventional technique. Explanation of symbols 10 ... Outer joint body, 11 ... Female thread for connecting pipe with pipe 12 ... Female thread for assembly, 20 ... Inner surface resin coating layer 22 ... Inner surface coating part, 23 ... Cylindrical part 30 ... Inner fitting body, 31 ... Piping Male thread for pipes for connection to equipment 32… Male thread for assembly, 33… Annular protrusion 331… Side surface, 34… Female thread for connection with pipe 40… Electrical insulation layer, 50… Adhesive layer 60… Annular ring
Claims (1)
管と接続する管用めねじを有し他端部に組立用のめねじ
を有する鋳鉄製の外側継手本体と、 略円筒状で、一端部の外周面に平滑部と前記外側継手本
体の組立用めねじに螺合する組立用おねじと組立用おね
じに続いて軸直角方向の側面とを有し、他端部に配管器
具と接続する管用ねじを有する前記外側継手本体とは異
種金属の銅合金製内側継手本体と、 前記外側継手本体の管用めねじと組立用めねじとを除く
内周面を樹脂で被覆すると共に前記内側継手本体の平滑
部に周方向重なる平滑内周面を有した内面被覆部と、こ
の内面被覆部から前記管用めねじ側に延出して前記接続
するライニング鋼管の内周面を覆う円筒部とを有する内
面樹脂被覆層と、 前記外側継手本体の組立用めねじと前記内側継手本体の
組立用おねじとの少なくとも何れかの表面に樹脂をコー
テイングした電気絶縁層と、 前記電気絶縁層をコーテイングしたねじと該ねじに螺合
するねじとを接着すると共に内側継手部材と内面被覆部
とを接着する接着剤層と、 前記外側継手本体の組立用めねじ側端面と前記内側継手
本体の側面との間で挟着される電気絶縁性材料の環状リ
ングとからなり、 前記外側継手本体と内側継手本体とを接着剤層で螺着結
合することにより、前記環状リングが外側継手本体の端
面と内側継手本体の側面とで挟着され接着剤層によって
密封固定されると共に、内部流通水から外側継手本体の
内面が内面樹脂被覆層と内側継手本体と接着剤層とによ
って連続して覆われ遮断されることを特徴とする水用電
気絶縁管継手。1. An outer joint body made of cast iron, which has a substantially cylindrical shape and has a female thread for a pipe connected to a resin-lined steel pipe at one end and an female thread for assembly at the other end; Has a smooth portion on the outer peripheral surface, a male thread for assembly that is screwed into the female thread for assembly of the outer joint body, and a side surface in the direction perpendicular to the axis following the male thread for assembly, and a piping device at the other end. The inner joint body made of a copper alloy of a dissimilar metal and the outer joint body having a pipe thread to be connected, the inner joint surface of the outer joint body excluding the female thread for pipe and the female thread for assembly is covered with resin and the inner side. An inner surface coating portion having a smooth inner circumferential surface that overlaps the smooth portion of the joint body in the circumferential direction, and a cylindrical portion that extends from the inner surface coating portion to the female thread side for pipe and covers the inner circumferential surface of the connecting lining steel pipe. An inner surface resin coating layer having a female thread for assembling the outer joint body and a front An electrical insulation layer having a resin coated on at least one surface of the male thread for assembling the inner joint body, a screw having the electrical insulation layer coated thereon, and a screw screwed to the screw, and an inner joint member. An adhesive layer for adhering the inner surface coating portion, and an annular ring of an electrically insulating material sandwiched between the female thread side end surface for assembly of the outer joint body and the side surface of the inner joint body, By screwing the outer joint body and the inner joint body with an adhesive layer, the annular ring is sandwiched between the end surface of the outer joint body and the side surface of the inner joint body and hermetically fixed by the adhesive layer, An electrically insulating pipe joint for water, characterized in that the inner surface of the outer joint body is continuously covered and blocked from the internal circulating water by the inner surface resin coating layer, the inner joint body and the adhesive layer.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1989046002U JPH074386Y2 (en) | 1989-04-19 | 1989-04-19 | Electrically insulated pipe fittings for water |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1989046002U JPH074386Y2 (en) | 1989-04-19 | 1989-04-19 | Electrically insulated pipe fittings for water |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02136894U JPH02136894U (en) | 1990-11-15 |
JPH074386Y2 true JPH074386Y2 (en) | 1995-02-01 |
Family
ID=31560692
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1989046002U Expired - Lifetime JPH074386Y2 (en) | 1989-04-19 | 1989-04-19 | Electrically insulated pipe fittings for water |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH074386Y2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013036585A (en) * | 2011-08-10 | 2013-02-21 | Jfe Pipe Fitting Mfg Co Ltd | Pipe end anticorrosion joint and method of manufacturing the same |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007225050A (en) * | 2006-02-24 | 2007-09-06 | Hitachi Metals Ltd | Insulating pipe joint and pipe end corrosion-proof insulating pipe joint |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6145191A (en) * | 1984-08-10 | 1986-03-05 | 日立金属株式会社 | Insulating coupling |
JPH0542311Y2 (en) * | 1984-10-25 | 1993-10-25 | ||
JPS61190093U (en) * | 1985-05-18 | 1986-11-27 | ||
JPH0356710Y2 (en) * | 1986-11-10 | 1991-12-20 |
-
1989
- 1989-04-19 JP JP1989046002U patent/JPH074386Y2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013036585A (en) * | 2011-08-10 | 2013-02-21 | Jfe Pipe Fitting Mfg Co Ltd | Pipe end anticorrosion joint and method of manufacturing the same |
Also Published As
Publication number | Publication date |
---|---|
JPH02136894U (en) | 1990-11-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term |