JPS61169173A - Weldng method of branch pipe - Google Patents

Weldng method of branch pipe

Info

Publication number
JPS61169173A
JPS61169173A JP882985A JP882985A JPS61169173A JP S61169173 A JPS61169173 A JP S61169173A JP 882985 A JP882985 A JP 882985A JP 882985 A JP882985 A JP 882985A JP S61169173 A JPS61169173 A JP S61169173A
Authority
JP
Japan
Prior art keywords
branch pipe
joint part
welding
pipe
bevel edge
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
Application number
JP882985A
Other languages
Japanese (ja)
Other versions
JPH0526594B2 (en
Inventor
Minoru Yamada
実 山田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHI Corp
Original Assignee
IHI Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by IHI Corp filed Critical IHI Corp
Priority to JP882985A priority Critical patent/JPS61169173A/en
Publication of JPS61169173A publication Critical patent/JPS61169173A/en
Publication of JPH0526594B2 publication Critical patent/JPH0526594B2/ja
Granted legal-status Critical Current

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  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

PURPOSE:To improve the reliability of a joint part in welding of a base pipe and branch pipe by forming an inside bevel edge to at least one of said pipes. CONSTITUTION:The bevel edge of an angle alpha is formed to the inside surface side in the joint part of the base pipe 1 and the bevel edge of an angle gamma is worked to the inside surface side of the branch pipe 2. a weld metal is deposited on the inside surface side over the entire part of a weld zone and forms a penetration bead 3 when the joint part is welded with such groove shape. The joint part is further subjected to build-up weld zone thereon, by which the good joint part is obtd. The bevel edge may be formed only on either of the base pipe 1 or the branch pipe 2. Since penetration welding is made possible, the strength and reliability of the welded joint part is improved by the above- mentioned method.

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、分岐管特に母管に対して傾斜している分岐管
の溶接方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for welding a branch pipe, particularly a branch pipe that is inclined with respect to a main pipe.

［従来の技術］ 母管に分岐管を溶接する場合、第２図、第３図に示す如
く隅肉溶接をしている。[Prior Art] When welding a branch pipe to a main pipe, fillet welding is performed as shown in FIGS. 2 and 3.

従来の母管１と分岐管２との溶接前組付状態は第４図、
第５図に示す如くであり、母管１と分岐管２と接合線を
隅肉溶接するが、母管１と分岐管２の肉厚の為裏波は出
ることはなかった。The conventional assembled state of the main pipe 1 and branch pipe 2 before welding is shown in Figure 4.
As shown in FIG. 5, the joining line between the main pipe 1 and the branch pipe 2 was fillet welded, but due to the thickness of the main pipe 1 and the branch pipe 2, no back waves were produced.

［考案が解決しようとする問題点］ 本発明は上記実情に鑑み分岐管の隅肉溶接に於いても良
りＹな裏波溶接を可能とし、溶接品質、信頼性を向上さ
せようとするものである。[Problems to be solved by the invention] In view of the above-mentioned circumstances, the present invention aims to improve welding quality and reliability by making it possible to carry out good-quality back wave welding even in fillet welding of branch pipes. It is.

［問題点を解決する為の手段］ 本発明は、母管、分岐管の少なくとも１方に内面開先を
形成したちである。[Means for Solving the Problems] In the present invention, an inner groove is formed in at least one of the main pipe and the branch pipe.

［作　　　用］ 内面開先どじであるので、ｆｆｉ管と分岐管の接合部の
肉厚が薄くなり、被層の隅肉溶接で裏波ビードが形成さ
れる。[Function] Since the inner surface is beveled, the wall thickness of the joint between the ffi pipe and the branch pipe becomes thinner, and a uranami bead is formed by fillet welding of the covering layer.

［実　施　例］ 以下図面を参照しつつ本発明の詳細な説明する。[Example] The present invention will be described in detail below with reference to the drawings.

第１図に示す如く、母管１の継手部の内面側を角度αの
開先形状とし、分岐管２についても内面側を角度γの開
先形状とする。As shown in FIG. 1, the inner surface of the joint portion of the main pipe 1 has a bevel shape with an angle α, and the inner surface of the branch pipe 2 has a bevel shape with an angle γ.

上記の様に母管１、分岐管２の内面側に開先を施してい
るので、継手部を溶接すると、全周にわたり容易に溶融
金属が内面側に溶（プでて裏波ビード３を形成する。而
して、更に肉盛溶接を行えば、良好な溶接を行える。As mentioned above, since the inner surface of the main pipe 1 and the branch pipe 2 are beveled, when the joint is welded, the molten metal easily melts to the inner surface over the entire circumference (pulls out and forms the uranami bead 3). Then, if build-up welding is further performed, good welding can be achieved.

尚、前記した開先角度α、γは大ぎいほうが安定な裏波
溶接（裏波ビードの形成）が可能となる。Incidentally, the larger the groove angles α and γ described above, the more stable Uranami welding (formation of Uranami beads) becomes possible.

又、７Ｌ記実施例では、母管１、分岐管２とも開先を形
成したがいずれか１方のみであってもよいことは勿論で
ある。Further, in Example 7L, both the main pipe 1 and the branch pipe 2 are beveled, but it goes without saying that only one of the bevels may be formed.

［発明の効果１ 分岐管の隅肉溶接に於いても裏波溶接が可能となり、分
岐管継手部の信頼性を向上せしめることが可能となる。[Effect of the Invention 1] Uranami welding is also possible in fillet welding of branch pipes, making it possible to improve the reliability of the branch pipe joint.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の詳細な説明図、第２図は分岐管継手部
の側面図、第３図は同前平面図、第４図、第５図はそれ
ぞれ従来の母管、分岐管の組付状態を示す説明図である
。 １は母管、２は分岐管、３は裏波ヒートを示す。 ＝３−Fig. 1 is a detailed explanatory diagram of the present invention, Fig. 2 is a side view of the branch pipe joint, Fig. 3 is a front plan view thereof, and Figs. 4 and 5 are of the conventional main pipe and branch pipe, respectively. It is an explanatory view showing an assembled state. 1 indicates the main pipe, 2 indicates the branch pipe, and 3 indicates the Uranami heat. =3-

Claims (1)

【特許請求の範囲】[Claims] １）母管、分岐管の少なくとも１方に内面開先を形成し
たことを特徴とする分岐管の溶接方法。1) A method for welding a branch pipe, characterized in that an inner groove is formed on at least one of the main pipe and the branch pipe.
JP882985A 1985-01-21 1985-01-21 Weldng method of branch pipe Granted JPS61169173A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP882985A JPS61169173A (en) 1985-01-21 1985-01-21 Weldng method of branch pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP882985A JPS61169173A (en) 1985-01-21 1985-01-21 Weldng method of branch pipe

Publications (2)

Publication Number Publication Date
JPS61169173A true JPS61169173A (en) 1986-07-30
JPH0526594B2 JPH0526594B2 (en) 1993-04-16

Family

ID=11703676

Family Applications (1)

Application Number Title Priority Date Filing Date
JP882985A Granted JPS61169173A (en) 1985-01-21 1985-01-21 Weldng method of branch pipe

Country Status (1)

Country Link
JP (1) JPS61169173A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007059790A1 (en) * 2005-11-25 2007-05-31 Siemens Aktiengesellschaft Method of welding a tube end to the outer wall of a support with a reduced inner side of the tube end; arrangement, produced according to this method; ultrasonic flow meter
CN105921862A (en) * 2016-06-27 2016-09-07 葛洲坝机械工业有限公司 Welding treatment method suitable for oblique crossing combined forming of steel pipes

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5950975A (en) * 1982-09-13 1984-03-24 Showa Alum Corp Welding method of metallic member and metallic pipe

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5950975A (en) * 1982-09-13 1984-03-24 Showa Alum Corp Welding method of metallic member and metallic pipe

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007059790A1 (en) * 2005-11-25 2007-05-31 Siemens Aktiengesellschaft Method of welding a tube end to the outer wall of a support with a reduced inner side of the tube end; arrangement, produced according to this method; ultrasonic flow meter
CN105921862A (en) * 2016-06-27 2016-09-07 葛洲坝机械工业有限公司 Welding treatment method suitable for oblique crossing combined forming of steel pipes

Also Published As

Publication number Publication date
JPH0526594B2 (en) 1993-04-16

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