JPS5548493A - Groove for branch pipe welding - Google Patents

Groove for branch pipe welding

Info

Publication number
JPS5548493A
JPS5548493A JP12034778A JP12034778A JPS5548493A JP S5548493 A JPS5548493 A JP S5548493A JP 12034778 A JP12034778 A JP 12034778A JP 12034778 A JP12034778 A JP 12034778A JP S5548493 A JPS5548493 A JP S5548493A
Authority
JP
Japan
Prior art keywords
groove
welding
branch pipe
circumference
beads
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.)
Pending
Application number
JP12034778A
Other languages
Japanese (ja)
Inventor
Akira Onishi
Mutsusuke Tokuno
Norihisa Miyake
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP12034778A priority Critical patent/JPS5548493A/en
Publication of JPS5548493A publication Critical patent/JPS5548493A/en
Pending legal-status Critical Current

Links

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  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

PURPOSE: To make it possible to carry out continuously multi-layer welding of a joint where a base pipe and branch pipe cross each other, by uniforming the groove angle of the branch pipe over the entire circumference of it.
CONSTITUTION: Groove angle α(θ) is expressed by a function of (θ) since height H of a normal between intersection A between the groove face and branch-pipe outer circumference is constant at an angle 0W360° around θ axis 4. Namely, α(θ), being denoted by α0 with θ=0°, can be expressed formula 1. The groove-face shape like this makes continuous welding of welding part 3 possible. For the purpose, the welding part encircled by a cylinder of (D0+2ΔZ) in outer diameter with the same center as base tube 1 is divided by a group of cylinders which have the same center as branch pipe 2 and increase in radius by ΔR for the 1st-step welding. Next, divided S1 is filled with weld beads for one circumference and S2 and S3 are also filled with single-circumference beads, thereby ending the 1st step. Here, ΔR denoting an overlap of weld beads and ΔZ denoting height of a single-layer weld bead are both determined in an experiment. Then, stacking is continued in 2nd and 3rd steps until a N step. Here, N is equal to H/ΔZ (raising to unit fractions not lower than zero).
COPYRIGHT: (C)1980,JPO&Japio
JP12034778A 1978-10-02 1978-10-02 Groove for branch pipe welding Pending JPS5548493A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12034778A JPS5548493A (en) 1978-10-02 1978-10-02 Groove for branch pipe welding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12034778A JPS5548493A (en) 1978-10-02 1978-10-02 Groove for branch pipe welding

Publications (1)

Publication Number Publication Date
JPS5548493A true JPS5548493A (en) 1980-04-07

Family

ID=14783978

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12034778A Pending JPS5548493A (en) 1978-10-02 1978-10-02 Groove for branch pipe welding

Country Status (1)

Country Link
JP (1) JPS5548493A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57208720A (en) * 1981-06-17 1982-12-21 Matsushita Electric Ind Co Ltd Comb line filter
JPS63278671A (en) * 1987-05-07 1988-11-16 Mitsubishi Heavy Ind Ltd Saddle type weld line welding method for pipe intersection part
JP2011173139A (en) * 2010-02-23 2011-09-08 Mitsubishi Heavy Ind Ltd Plug structure of inspection hole

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57208720A (en) * 1981-06-17 1982-12-21 Matsushita Electric Ind Co Ltd Comb line filter
JPS63278671A (en) * 1987-05-07 1988-11-16 Mitsubishi Heavy Ind Ltd Saddle type weld line welding method for pipe intersection part
JP2011173139A (en) * 2010-02-23 2011-09-08 Mitsubishi Heavy Ind Ltd Plug structure of inspection hole

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