JPH08246162A - Method and device for surface treatment of threaded portion of steel pipe - Google Patents
Method and device for surface treatment of threaded portion of steel pipeInfo
- Publication number
- JPH08246162A JPH08246162A JP4406095A JP4406095A JPH08246162A JP H08246162 A JPH08246162 A JP H08246162A JP 4406095 A JP4406095 A JP 4406095A JP 4406095 A JP4406095 A JP 4406095A JP H08246162 A JPH08246162 A JP H08246162A
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- threaded portion
- chemical conversion
- conversion treatment
- water
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
- C23C22/76—Applying the liquid by spraying
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating Apparatus (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
(57)【要約】
【構成】 鋼管Ｐ端部のねじ部に液をスプレーして化成
処理を施す方法であって、鋼管Ｐを回転させながら移送
する間に、前記ねじ部に脱脂洗浄液を供給して脱脂洗浄
する工程と、脱脂洗浄されたねじ部を水洗する工程と、
水洗されたねじ部に処理液を供給して化成処理する工程
と、化成処理されたねじ部を水洗する工程から成る一連
の工程を順次連続して施す。
【効果】 鋼管のねじ部に周方向に均一な皮膜を形成で
きる。また、各処理工程において独立して鋼管のねじ部
を処理するので、処理能率が向上する。
(57) [Summary] [Structure] A method of performing chemical conversion treatment by spraying a liquid onto a threaded portion of a steel pipe P, wherein a degreasing cleaning liquid is supplied to the threaded portion while the steel pipe P is being transferred while being rotated. And a step of degreasing and washing, and a step of washing the degreased and washed screw portion with water,
A series of steps including a step of supplying a treatment liquid to the washed screw portion to perform a chemical conversion treatment and a step of washing the chemical treated screw portion with water are sequentially performed. [Effect] A uniform film can be formed on the threaded portion of the steel pipe in the circumferential direction. Further, since the threaded portion of the steel pipe is processed independently in each processing step, the processing efficiency is improved.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、鋼管のねじ部に化学的
表面処理を施す方法及び装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for chemically treating the threaded portion of a steel pipe.
【０００２】[0002]
【従来の技術】従来、鋼管を接続する際に発生するねじ
表面のかじりを防止するために、ねじの表面に化成処理
（主にリン酸亜鉛処理）が施されている。この鋼管ねじ
部に化成処理を施す方法として、適当な角度で傾斜さ
せた鋼管の管端ねじ部を処理槽内の処理液に浸漬する方
法、鋼管の管端ねじ部に処理液をスプレーする方法が
ある。2. Description of the Related Art Conventionally, in order to prevent galling of a screw surface that occurs when connecting steel pipes, the surface of the screw has been subjected to a chemical conversion treatment (mainly a zinc phosphate treatment). As a method of performing chemical conversion treatment on this steel pipe threaded portion, a method of immersing the pipe end threaded portion of the steel pipe inclined at an appropriate angle in the treatment liquid in the treatment tank, or a method of spraying the treatment liquid on the pipe end screwed portion of the steel pipe There is.
【０００３】ところで、の方法は、ねじ部周方向に均
一な厚さの皮膜が得られるので高品質の鋼管を処理でき
るという利点を有しているが、鋼管を傾斜させる装置が
必要になり、設備が複雑で大きくなるという問題を有し
ている。また、の方法は、大きな処理設備を必要とす
ることがなく、処理能率が優れているという利点を有し
ている。しかし、ねじ部周方向に均一な厚さの皮膜を得
ることが難しく、品質が安定しないという問題を有して
いる。By the way, the above method has an advantage that a high-quality steel pipe can be processed because a film having a uniform thickness is obtained in the circumferential direction of the threaded portion, but a device for inclining the steel pipe is required, There is a problem that the equipment is complicated and large. In addition, the method (1) has an advantage that it does not require a large processing facility and is excellent in processing efficiency. However, there is a problem in that it is difficult to obtain a film having a uniform thickness in the circumferential direction of the screw part, and the quality is not stable.
【０００４】そこで、上記の方法による問題を解消
すべく管端ねじ部に皮膜処理を施す方法及び装置が、特
開昭６３−６５９７８号公報で提案されている。Therefore, a method and apparatus for coating the threaded portion of the pipe end with a coating in order to solve the problems caused by the above method is proposed in Japanese Patent Laid-Open No. 63-65978.
【０００５】[0005]
【発明が解決しようとする課題】しかし、この方法及び
装置は、脱脂工程，水洗工程，皮膜処理工程を施す装置
をシリンダ装置の作動によって切り換えて各工程を施し
ているので、各工程の切り換え時間が必要である。さら
に、所定本数ずつ鋼管を処理する構成であるので、外径
の大きな鋼管例えば外径２００ｍｍ以上の鋼管を処理す
る場合には、設備の大型化が必要となる。また、一度に
処理できる鋼管の数が制限されるので、処理される鋼管
を収納する空間が必要である。However, in this method and apparatus, since the apparatus for performing the degreasing step, the water washing step, and the film treatment step is switched by the operation of the cylinder device to perform each step, the switching time of each step is changed. is necessary. Further, since the steel pipe is configured to process a predetermined number of steel pipes at a time, it is necessary to increase the size of equipment when processing a steel pipe having a large outer diameter, for example, a steel pipe having an outer diameter of 200 mm or more. Further, since the number of steel pipes that can be processed at one time is limited, a space for housing the steel pipes to be processed is required.
【０００６】本発明は、上記した問題に鑑みて成された
ものであり、設備の大型化を招くことなく、品質に優れ
た鋼管を能率よく表面処理できる鋼管のねじ部表面処理
方法及び装置を提供することを目的としている。The present invention has been made in view of the above problems, and provides a method and an apparatus for surface treatment of a threaded portion of a steel pipe capable of efficiently surface-treating a steel pipe of excellent quality without increasing the size of equipment. It is intended to be provided.
【０００７】[0007]
【課題を解決するための手段】上記した目的を達成する
ために、本発明の方法は、鋼管端部のねじ部に液をスプ
レーして化成処理を施す方法であって、鋼管を回転させ
ながら移送する間に、前記ねじ部に脱脂洗浄液を供給し
て脱脂洗浄する工程と、脱脂洗浄されたねじ部を水洗す
る工程と、水洗されたねじ部に処理液を供給して化成処
理する工程と、化成処理されたねじ部を水洗する工程か
ら成る一連の工程を順次連続して施すのである。In order to achieve the above-mentioned object, the method of the present invention is a method of spraying a liquid on the threaded portion of the end of a steel pipe for chemical conversion treatment, while rotating the steel pipe. During the transfer, a step of supplying a degreasing cleaning liquid to the threaded portion for degreasing and cleaning, a step of washing the degreased and cleaned threaded portion with water, and a step of supplying a treatment liquid to the washed threaded portion for chemical conversion treatment. The series of steps including the step of washing the chemical conversion treated screw portion with water is successively performed.
【０００８】また、本発明の装置は、鋼管端部のねじ部
に化成処理を施す装置であって、傾斜スキッドと、この
傾斜スキッドの上面より突出する突起を所定の間隔を存
して形成し、所定の速度で駆動されるチェーンを設けた
鋼管移送装置を備え、脱脂洗浄液を供給する脱脂洗浄ノ
ズルと、水を供給する水洗ノズルと、化成処理液を供給
する化成処理ノズルを前記鋼管移送装置の上方に配設す
ると共に、これら各ノズル間には各ノズルから供給され
る脱脂洗浄液，化成処理液，水が混合しないように区画
するカーテンを介設したのである。Further, the device of the present invention is a device for subjecting a threaded portion of a steel pipe end to a chemical conversion treatment, in which an inclined skid and a projection protruding from the upper surface of the inclined skid are formed with a predetermined interval. , A steel pipe transfer device provided with a chain driven at a predetermined speed, wherein the degreasing cleaning nozzle for supplying the degreasing cleaning liquid, the water cleaning nozzle for supplying water, and the chemical conversion treatment nozzle for supplying the chemical conversion treatment liquid are provided in the steel pipe transfer device. And a curtain for partitioning the degreasing cleaning liquid, the chemical conversion treatment liquid, and the water supplied from the nozzles so as not to mix with each other.
【０００９】[0009]
【作用】本発明の方法及び装置によれば、脱脂洗浄液に
よって脱脂洗浄する工程と、脱脂洗浄されたねじ部を水
洗する工程と、水洗されたねじ部に処理液を供給して化
成処理する工程と、化成処理されたねじ部を水洗する工
程それぞれを順次連続して、回転しながら移送される鋼
管のねじ部に施すことになるので、鋼管のねじ部に周方
向に均一な皮膜を形成できる。また、各処理工程におい
て独立して鋼管のねじ部を処理するので、処理能率が向
上する。According to the method and apparatus of the present invention, a step of degreasing and cleaning with a degreasing cleaning liquid, a step of washing the degreased and washed screw portion with water, and a step of supplying a treatment liquid to the washed screw portion and performing chemical conversion treatment. And the step of washing the chemical-treated threaded portion with water is successively applied to the threaded portion of the steel pipe that is being transferred while rotating, so that a uniform film can be formed in the circumferential direction on the threaded portion of the steel pipe. . Further, since the threaded portion of the steel pipe is processed independently in each processing step, the processing efficiency is improved.
【００１０】[0010]
【実施例】以下、本発明の一実施例を添付した図面に基
づいて説明する。図１は本発明方法を実施するための本
発明装置の構成を示した図、図２は本発明装置の構成要
素である鋼管移送装置の構成を示した図である。An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a diagram showing a configuration of an apparatus of the present invention for carrying out the method of the present invention, and FIG. 2 is a diagram showing a configuration of a steel pipe transfer apparatus which is a constituent element of the apparatus of the present invention.
【００１１】図面において、１はキッカー２１より受け
取った管端にねじを加工された鋼管Ｐを回転させながら
移送する鋼管移送装置であって、傾斜スキッド２の上面
より突出して鋼管Ｐに当接する突起３ａを所定の間隔例
えば５００ｍｍを存して設けたチェーン３が駆動源例え
ばモータ４によって所定の速度で回転し、傾斜スキッド
２上を鋼管Ｐが所定の速度及び所定の間隔を存して順次
移動されるように構成している。In the drawings, reference numeral 1 is a steel pipe transfer device for transferring a steel pipe P having a screw processed at a pipe end received from a kicker 21 while rotating it, and a protrusion protruding from the upper surface of the inclined skid 2 and abutting the steel pipe P. A chain 3 provided with 3a at a predetermined interval, for example 500 mm, is rotated at a predetermined speed by a drive source, for example, a motor 4, and a steel pipe P is sequentially moved on the inclined skid 2 at a predetermined speed and a predetermined interval. It is configured to be done.
【００１２】そして、鋼管移送装置１の上方には、移送
される鋼管Ｐに一連の化成処理を施すべく、鋼管Ｐのね
じ部に脱脂洗浄液を噴射する脱脂洗浄ノズル５、脱脂洗
浄されたねじ部に水を噴射する第１の水洗ノズル６、水
洗されたねじ部に化成処理液を供給して皮膜を形成する
化成処理ノズル７、ねじ部に過剰に残留する化成処理液
を洗い流すべく水，湯を噴射する第２の水洗ノズル８と
湯洗ノズル９が上流側より順次配設されており、例えば
ゴム製のカーテン１０が処理時間に応じた間隔を存して
各ノズル５〜９間に設けられて鋼管Ｐのねじ部に供給さ
れる液が混合するのを防止している。Above the steel pipe transfer device 1, a degreasing cleaning nozzle 5 for injecting a degreasing cleaning liquid on the threaded portion of the steel pipe P for performing a series of chemical conversion treatment on the steel pipe P to be transferred, and a degreased and cleaned screw portion. First water-washing nozzle 6 for injecting water into the water, chemical conversion treatment nozzle 7 for supplying a chemical conversion treatment liquid to the washed screw portion to form a film, water, hot water for washing away excess chemical conversion treatment liquid remaining on the screw portion. The second water washing nozzle 8 and the hot water washing nozzle 9 for injecting the water are sequentially arranged from the upstream side, and, for example, a rubber curtain 10 is provided between the nozzles 5 to 9 with an interval according to the processing time. The liquid supplied to the threaded portion of the steel pipe P is prevented from mixing.
【００１３】なお、鋼管Ｐのねじ部表面に形成される皮
膜のむらを防止するため、化成処理ノズル７にはラミナ
ーノズルが用いられており、各処理時間に応じて各ノズ
ル５〜９を設けたブースの幅を変えている。A laminar nozzle is used as the chemical conversion treatment nozzle 7 in order to prevent unevenness of the film formed on the surface of the threaded portion of the steel pipe P, and the nozzles 5 to 9 are provided according to the treatment time. The width of the booth is changing.
【００１４】また、各ノズル５〜９より供給された液を
収容する例えばステンレス製の処理液受け槽１１〜１５
が鋼管移送装置１の下方で各ノズル５〜９に対する位置
に設置されており、各処理液受け槽１１〜１５に収容さ
れた液は各配管１６〜２０を経て各液を貯蔵する図示し
ないタンクへと送られる。Further, the processing liquid receiving tanks 11 to 15 made of, for example, stainless steel for containing the liquids supplied from the respective nozzles 5 to 9
Is installed below the steel pipe transfer device 1 at positions corresponding to the nozzles 5 to 9, and the liquid stored in the processing liquid receiving tanks 11 to 15 is a tank (not shown) for storing the liquid via the pipes 16 to 20. Sent to.
【００１５】本発明方法は、上記した構成の本発明装置
を用いて実施するのであって、管端部にねじを加工され
た鋼管Ｐはキッカー２１によって鋼管移送装置１へと送
られ、鋼管移送装置１上を移動する間にねじ部表面に化
成処理を施される。The method of the present invention is carried out by using the apparatus of the present invention having the above-described structure. The steel pipe P having a threaded end is sent to the steel pipe transfer device 1 by the kicker 21 and the steel pipe is transferred. While moving on the device 1, the surface of the threaded portion is subjected to a chemical conversion treatment.
【００１６】このとき、鋼管移送装置１で移送される鋼
管Ｐは、脱脂洗浄ノズル５より脱脂洗浄液を噴射されて
ねじ部表面の油，ごみを洗浄除去された後に、第１の水
洗ノズル６より噴射された水によってねじ部に残留する
脱脂洗浄液が洗い流される。そして、化成処理ノズル７
の下方位置では化成処理ノズルより化成処理液が供給さ
れて鋼管のねじ部に皮膜を形成し、第２の水洗ノズル
８，湯洗ノズル９の下方位置では第２の水洗ノズル８，
湯洗ノズル９より噴射された水，湯によってねじ部表面
に過剰に付着した化成処理液が洗い流される。そして、
上記のようにねじ部表面に化成処理が施された鋼管Ｐ
は、キッカー２２によって鋼管移送装置１より集積場へ
送り出される。At this time, the steel pipe P transferred by the steel pipe transfer device 1 is sprayed with a degreasing cleaning liquid from the degreasing cleaning nozzle 5 to wash and remove oil and dust on the screw surface, and then the first water washing nozzle 6 The degreasing cleaning liquid remaining on the screw part is washed away by the sprayed water. And the chemical conversion treatment nozzle 7
In the lower position of the, the chemical conversion treatment liquid is supplied from the chemical conversion treatment nozzle to form a film on the thread portion of the steel pipe, and in the lower position of the second water washing nozzle 8 and the hot water washing nozzle 9, the second water washing nozzle 8,
The water and the hot water sprayed from the hot water washing nozzle 9 wash away the chemical conversion treatment liquid excessively attached to the surface of the screw portion. And
Steel pipe P whose surface is subjected to chemical conversion treatment as described above
Is sent from the steel pipe transfer device 1 to the collection site by the kicker 22.
【００１７】外径φ９．６２５インチ（約２４４ｍｍ）
の鋼管のねじ部に本発明方法及び従来方法（特開昭６３
−６５９７８号公報で提案されている方法）によって表
１に示す各処理時間で化成処理（リン酸亜鉛処理）を施
した場合を比較する。Outer diameter φ9.625 inches (about 244 mm)
Of the present invention and the conventional method for the threaded portion of the steel pipe of
The method in which the chemical conversion treatment (zinc phosphate treatment) is performed at each treatment time shown in Table 1 by the method proposed in JP-A-65978) is compared.
【００１８】[0018]
【表１】 [Table 1]
【００１９】本発明方法の場合、突起３ａを５００ｍｍ
間隔で設けたチェーンを備えて鋼管を５００ｍｍ／分の
速度で搬送する装置を構成すると待機スペース５００ｍ
ｍを含めて６０００ｍｍ幅の装置となり、その処理能力
は６０本／時となる。これに対して、６０００ｍｍ幅の
装置を用いた従来方法の場合には、処理スペース（３０
００ｍｍ）と同等の待機スペース（３０００ｍｍ）が必
要となるので一度に処理できる鋼管は１０本であり、ま
た鋼管を搬入搬出する時間（２分）及び各工程の切替時
間（２分）が必要となるので処理時間は１５分となって
その処理能力は４０本／時である。In the case of the method of the present invention, the protrusion 3a is set to 500 mm.
Standing space is 500m if the device is equipped with chains provided at intervals to convey steel pipes at a speed of 500mm / min.
The device has a width of 6000 mm including m, and the processing capacity is 60 lines / hour. On the other hand, in the case of the conventional method using an apparatus with a width of 6000 mm, the processing space (30
Since a standby space (3000 mm) equivalent to 00 mm) is required, 10 steel pipes can be processed at one time, and a time for loading and unloading steel pipe (2 minutes) and a switching time for each process (2 minutes) are required. Therefore, the processing time is 15 minutes and the processing capacity is 40 lines / hour.
【００２０】上記のように同等の大きさの装置を使用し
た場合には、本発明方法は従来方法と比較して１．５倍
の処理能力を有しており、従来方法の場合には処理完了
までに待機スペースに収納される鋼管が１０本未満であ
ると処理能力が低下するという問題を有している。ま
た、本発明方法によれば、鋼管を回転させる回転駆動装
置や各工程を切り替える切替装置が必要ないので、装置
の構成が簡略化できる。When the apparatus of the same size is used as described above, the method of the present invention has a processing capacity of 1.5 times that of the conventional method. If the number of steel pipes stored in the standby space is less than 10 by the time of completion, there is a problem that the processing capacity is lowered. Further, according to the method of the present invention, since a rotation driving device for rotating the steel pipe and a switching device for switching each process are not required, the structure of the device can be simplified.
【００２１】[0021]
【発明の効果】以上説明したように、本発明の方法及び
装置によれば、回転しながら移送される鋼管のねじ部に
対して、脱脂洗浄液によって脱脂洗浄する工程と、脱脂
洗浄されたねじ部を水洗する工程と、水洗されたねじ部
に処理液を供給して化成処理する工程と、化成処理され
たねじ部を水洗する工程を順次連続して施すので、鋼管
のねじ部に周方向に均一な皮膜を形成できる。また、処
理能率が向上する。As described above, according to the method and apparatus of the present invention, the step of degreasing and cleaning the threaded portion of the steel pipe transferred while rotating with the degreasing cleaning liquid, and the threaded portion cleaned by degreasing The step of washing the steel pipe, the step of supplying the treatment liquid to the washed screw portion and the chemical conversion treatment, and the step of washing the chemical-treated screw portion with water are performed successively in succession, so A uniform film can be formed. In addition, the processing efficiency is improved.
【図１】本発明方法を実施するための本発明装置の構成
を示した図である。FIG. 1 is a diagram showing a configuration of an apparatus of the present invention for carrying out a method of the present invention.
【図２】本発明装置の構成要素である鋼管移送装置の構
成を示した図である。FIG. 2 is a diagram showing a configuration of a steel pipe transfer device which is a component of the device of the present invention.
１ 鋼管移送装置 ２ 傾斜スキッド ３ チェーン ３ａ 突起 ５ 脱脂洗浄ノズル ６ 第１の水洗ノズル ７ 化成処理ノズル ８ 第２の水洗ノズル ９ 湯洗ノズル １０ カーテン Ｐ 鋼管 1 Steel Pipe Transfer Device 2 Inclined Skid 3 Chain 3a Protrusion 5 Degreasing Washing Nozzle 6 First Water Washing Nozzle 7 Chemical Conversion Nozzle 8 Second Water Washing Nozzle 9 Hot Water Washing Nozzle 10 Curtain P Steel Pipe
Claims (2)
成処理を施す方法であって、鋼管を回転させながら移送
する間に、前記ねじ部に脱脂洗浄液を供給して脱脂洗浄
する工程と、脱脂洗浄されたねじ部を水洗する工程と、
水洗されたねじ部に処理液を供給して化成処理する工程
と、化成処理されたねじ部を水洗する工程から成る一連
の工程を順次連続して施すことを特徴とする鋼管のねじ
部表面処理方法。1. A method of chemical conversion treatment by spraying a liquid on a threaded portion of a steel pipe end, wherein a degreasing cleaning liquid is supplied to the threaded portion while the steel pipe is being transferred while being rotated to perform degreasing cleaning. And a step of washing the degreased and washed screw portion with water,
A surface treatment of the threaded portion of a steel pipe, characterized in that a series of steps including a step of supplying a treatment liquid to the washed threaded portion for chemical conversion treatment and a step of washing the chemical treated threaded portion with water are successively performed. Method.
であって、傾斜スキッドと、この傾斜スキッドの上面よ
り突出する突起を所定の間隔を存して形成し、所定の速
度で駆動されるチェーンを設けた鋼管移送装置を備え、
脱脂洗浄液を供給する脱脂洗浄ノズルと、水を供給する
水洗ノズルと、化成処理液を供給する化成処理ノズルを
前記鋼管移送装置の上方に配設すると共に、これら各ノ
ズル間には各ノズルから供給される脱脂洗浄液，化成処
理液，水が混合しないように区画するカーテンを介設し
たことを特徴とする鋼管のねじ部表面処理装置。2. A device for subjecting a threaded portion of a steel pipe to a chemical conversion treatment, wherein an inclined skid and a projection protruding from an upper surface of the inclined skid are formed at a predetermined interval and driven at a predetermined speed. Equipped with a steel pipe transfer device with a chain
A degreasing cleaning nozzle that supplies a degreasing cleaning liquid, a water washing nozzle that supplies water, and a chemical conversion treatment nozzle that supplies a chemical conversion treatment liquid are arranged above the steel pipe transfer device, and the nozzles supply these nozzles to each other. A surface treatment device for threaded portion of a steel pipe, characterized in that a curtain is installed to partition the degreasing cleaning liquid, the chemical conversion treatment liquid and the water so that they do not mix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7044060A JP2988310B2 (en) | 1995-03-03 | 1995-03-03 | Thread surface treatment equipment for steel pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7044060A JP2988310B2 (en) | 1995-03-03 | 1995-03-03 | Thread surface treatment equipment for steel pipes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08246162A true JPH08246162A (en) | 1996-09-24 |
| JP2988310B2 JP2988310B2 (en) | 1999-12-13 |
Family
ID=12681089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7044060A Expired - Lifetime JP2988310B2 (en) | 1995-03-03 | 1995-03-03 | Thread surface treatment equipment for steel pipes |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2988310B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7244471B2 (en) * | 2002-06-06 | 2007-07-17 | Sumitomo Metal Industries, Ltd. | Method for surface treatment of metal pipes |
| JP2019189937A (en) * | 2018-04-20 | 2019-10-31 | 株式会社北陸濾化 | Method and apparatus for forming functional layer on surface of metal base material layer |
-
1995
- 1995-03-03 JP JP7044060A patent/JP2988310B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7244471B2 (en) * | 2002-06-06 | 2007-07-17 | Sumitomo Metal Industries, Ltd. | Method for surface treatment of metal pipes |
| JP2019189937A (en) * | 2018-04-20 | 2019-10-31 | 株式会社北陸濾化 | Method and apparatus for forming functional layer on surface of metal base material layer |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2988310B2 (en) | 1999-12-13 |
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