JPH0246306B2 - - Google Patents
Info
- Publication number
- JPH0246306B2 JPH0246306B2 JP56051229A JP5122981A JPH0246306B2 JP H0246306 B2 JPH0246306 B2 JP H0246306B2 JP 56051229 A JP56051229 A JP 56051229A JP 5122981 A JP5122981 A JP 5122981A JP H0246306 B2 JPH0246306 B2 JP H0246306B2
- Authority
- JP
- Japan
- Prior art keywords
- welding
- butt
- welded
- bottom plate
- flat
- 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
- 238000003466 welding Methods 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 230000035515 penetration Effects 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Description
【発明の詳細な説明】
＜産業上の利用分野＞
開示技術は平底円筒タンクの底板と側板の取合
部の断面凸字型の異形材の溶接の技術分野に属す
る。[Detailed Description of the Invention] <Industrial Application Field> The disclosed technology belongs to the technical field of welding a profiled member having a convex cross-section at the joint between the bottom plate and the side plate of a flat-bottomed cylindrical tank.
＜要旨の概要＞
而して、この出願の発明は低温平底円筒タンク
等の平底円筒タンクの底板と側板との取合部の溶
接方法において、底板外端縁に対し断面凸字型の
異形材ユニツトを突合せ溶接すると共に該異形材
ユニツト相互を端面突合せ溶接し、又、その上部
に側板を突合せ溶接していく平底円筒タンクの底
板−側板取合部溶接方法に関する発明であり、特
に、該異形材相互に溶接に際し、対向端面の少く
とも一方に半球状等のスポツト状の座ぐり穴を穿
設し、更には、該スポツト状の穿設座ぐり穴に銅
等の裏当金を添設して後に該スポツト状の座ぐり
穴内面にうら波を形成させて溶接し、健全な溶接
部を得るようにしたことを特徴とする平底円筒タ
ンクの底板−側板取合部溶接方法に係る発明であ
る。<Summary of the gist> The invention of this application is a method for welding a joint between a bottom plate and a side plate of a flat-bottomed cylindrical tank such as a low-temperature flat-bottomed cylindrical tank. This invention relates to a method for welding the bottom plate-to-side plate joint of a flat-bottomed cylindrical tank, in which units are butt-welded, the irregular-shaped units are butt-welded to each other, and a side plate is butt-welded to the upper part of the unit, and in particular, the irregular-shaped units are butt-welded. When welding the materials together, a hemispherical or other spot-shaped counterbore hole is drilled in at least one of the opposing end surfaces, and a backing metal such as copper is added to the spot-shaped counterbore hole. The invention relates to a method for welding a bottom plate-side plate joint of a flat-bottomed cylindrical tank, characterized in that the spot-shaped counterbore is welded by forming undulations on the inner surface of the spot-shaped counterbore to obtain a sound welded part. It is.
＜従来技術＞
周知の如く、石油類やLPG等の貯液タンクに
は第１図に示す様に、平底円筒タンク１が広く採
用されているが、その円筒状の側板２と平板状の
底板３との取合部４に於ては液圧が大きいうえに
該側板２が底板３に拘束されているため変形挙動
が複雑になり易く、一次応力のフープ応力、曲げ
変形に伴う二次応力が発生し易く、したがつて、
安全面で最も重要な部位であるにもかかわらず、
現実には第２図に示す様に、底板３の周縁部の所
謂アニユラープレート３′と側板２との突合せ溶
接あるいは隅肉溶接等を行つた構造としている。<Prior art> As is well known, a flat bottom cylindrical tank 1 as shown in Fig. 1 is widely used as a liquid storage tank for petroleum, LPG, etc., but its cylindrical side plate 2 and flat bottom plate are 3, the hydraulic pressure is large and the side plate 2 is restrained by the bottom plate 3, so the deformation behavior tends to be complicated, and the primary stress is hoop stress, and the secondary stress due to bending deformation. is likely to occur, therefore,
Despite being the most important part in terms of safety,
In reality, as shown in FIG. 2, the so-called annular plate 3' at the peripheral edge of the bottom plate 3 and the side plate 2 are butt welded or fillet welded.
＜発明が解決しようとする課題＞
さりながら、当該溶接部位には、上述した如
く、板厚が著しく大きくなり、例えば、大型タン
クでは40mmもの大きさとなり、溶着金属が大きく
なると共に溶け込み不良が生じ易く複雑、且つ、
大きな応力が発生し、溶接部の疲労強度の面等か
ら、特に大型タンクにとつて充分な構造といえな
い不都合さを生ずるようになつてきた。<Problems to be Solved by the Invention> However, as mentioned above, the plate thickness at the welding site becomes significantly large, for example, as large as 40 mm in a large tank, and as the weld metal becomes larger, poor penetration occurs. Easy, complicated, and
Large stresses are generated, and from the viewpoint of the fatigue strength of the welded parts, the structure has become inconvenient, especially for large tanks.
これに対処するに、出願人の先願発明（特開昭
52−51106号公報）等に見られる如く底板３の周
縁部に第３図に示す様な、断面凸字型で内外面が
彎曲形成された所定長さの異形材６を成形し、第
３，４図に示す様に、底板３の外側縁に対し突合
せ溶接７を行うと共に、該異形材６のユニツト相
互を端面の突合せ溶接８で接合し、更に、側板２
を突合せ溶接７′で上接していく技術が開発され
ている。 To deal with this, the applicant's earlier invention (unexamined patent application)
52-51106), a deformed member 6 of a predetermined length with a convex cross-section and curved inner and outer surfaces as shown in FIG. 3 is formed on the peripheral edge of the bottom plate 3, and As shown in FIG.
A technique has been developed in which the two are joined together by butt welding 7'.
しかしながら、当該第３図に示す様に、該異形
材６の側壁部６′の板厚Ｗは下位程厚くなるよう
に成形された底板部６″への移行部を成し、設計
曲げ剛性を有して応力に対処するようにされてい
る。 However, as shown in FIG. 3, the plate thickness W of the side wall portion 6' of the profiled member 6 forms a transition portion to the bottom plate portion 6'', which is formed so that it becomes thicker toward the bottom, and the design bending rigidity is reduced. It is designed to deal with stress.
したがつて、第４図に示す様に、該異形材６，
６相互の端面突合せ溶接８部に於いて、溶着金属
量が多くなり、中央部の溶け込み不良を生じ易い
欠点があり、又、溶接不健全を検査するようにし
ても、Ｘ線の透過不能を起こす不具合条件を有し
ており、そのため、実際上は施工が難しいという
難点を有していた。 Therefore, as shown in FIG.
6. In the 8 mutual end face butt welds, there is a disadvantage that the amount of welded metal is large and poor penetration in the center part is likely to occur.Also, even when inspecting for unsoundness of the weld, it is difficult to pass through X-rays. However, it has the disadvantage that it is difficult to construct in practice.
而して、例えば、特開昭50−153741号公報発明
のリツプ・シール・フランジに見られるようにリ
ツプ・シールに関する技術があり、フランジ合せ
部の切り欠きによる応力集中によるクラツク発生
等のトラブルを防ぐべくリツプ・シール部に円環
状構を形成してリツプ部先端に当接を行う技術が
開発されているが、該種先行技術においてはリツ
プシール部に円環状の溝が形成されていても、リ
ツプシール部の溶着金属が環状溝内に埋まること
がないようにする必要があり、円環状溝部分内に
うら波形成して良好な溶け込みをなすような技術
を見出すことが出来ない。 For example, there is a technology related to lip seals, as seen in the lip seal flange disclosed in JP-A-50-153741, which prevents troubles such as cracks caused by stress concentration due to the notches in the flange mating parts. In order to prevent this, a technique has been developed in which a ring-shaped structure is formed in the lip seal part and abuts against the tip of the lip part. It is necessary to prevent the welded metal of the lip seal portion from being buried in the annular groove, and it is not possible to find a technique that forms undulations within the annular groove to achieve good penetration.
該種円環状溝内に裏当金を配設する技術も無く
完全な溶接継手を形成することが出来ないという
不具合がある。 There is also no technique for disposing a backing metal in the seed annular groove, and there is a problem in that a complete welded joint cannot be formed.
＜発明の目的＞
この出願の発明の目的は上述従来技術の基づく
平底円筒タンクの底板と側板との取合部溶接の問
題点を解決すべき技術的課題としアニユラー部に
於ける異形材の溶接を健全に行え、検査も確実に
行えるようにしてエネルギー産業に於ける貯蔵技
術利用分野に益する優れた平底円筒タンクの底板
−側板取合部溶接方法を提供せんとするものであ
る。<Object of the Invention> The object of the invention of this application is to solve the technical problem of welding the joint between the bottom plate and the side plate of a flat-bottomed cylindrical tank based on the above-mentioned prior art, and to solve the problem of welding the joint between the bottom plate and the side plate of a flat-bottomed cylindrical tank based on the above-mentioned prior art. It is an object of the present invention to provide an excellent method of welding the bottom plate-side plate joint of a flat-bottomed cylindrical tank, which allows for sound and reliable inspection, and is useful for storage technology applications in the energy industry.
＜課題を解決するための手段・作用＞
上述目的に沿い先述特許請求の範囲を要旨とす
るこの発明の構成は前述問題点を解決するため
に、平底円筒タンクの底板と側板の取合部に於て
該取合部に介装する予め設計凸字型断面、及び、
長さに成形された異形材に対し端面の溶け込み不
良防止域に半球状等の設計サイズ形状のスポツト
状の座ぐり穴を穿設して該部の見かけ上の板厚を
薄くしておき、底板外側壁に突合せ溶接すると共
に該異形材端面をスポツト状の座ぐり穴内面にう
ら波を形成させて突合せ溶接を行い、又、側板を
突合せ溶接して上接するようにし、而して、該異
形材相互の突合せ溶接に際して該スポツト状の座
ぐり穴介設部にうら波を形成して溶け込みを良く
し、更には、該スポツト状の座ぐり穴に銅等の裏
当金を添設して放熱させ、同じく座ぐり穴内面に
うら波を形成させて健全溶接が出来るようにした
技術的手段を講じたものである。<Means and operations for solving the problem> In order to solve the above-mentioned problems, the structure of the present invention, which is based on the above-mentioned claims, is based on the above-mentioned object, and in order to solve the above-mentioned problems, A pre-designed convex cross-section interposed in the connecting portion, and
A spot-shaped counterbore hole with a designed size shape such as a hemispherical shape is drilled in the end face of the irregularly shaped material to prevent poor penetration, and the apparent thickness of the part is reduced. Butt welding is carried out by butt welding to the outer wall of the bottom plate, and the end face of the deformed material is formed into a wave on the inner surface of the spot-shaped counterbore, and the side plates are butt welded so that they are in contact with each other, and When butt welding irregular shaped materials, a backing is formed in the spot-shaped counterbore hole to improve welding, and a backing metal such as copper is added to the spot-shaped counterbore hole. This technology uses technical means to dissipate heat and form undulations on the inner surface of the counterbore to ensure sound welding.
＜実施例＞
次にこの出願の発明の実施例を第５図以の図面
に従つて説明すれば以下の通りである。<Example> Next, an example of the invention of this application will be described below with reference to the drawings from FIG. 5 onwards.
尚、第１〜４図と同一態様部分は同一符号を付
して説明するものとする。 Note that the same parts as in FIGS. 1 to 4 will be described with the same reference numerals.
第５図に示す態様において、異形材６は上向き
に設計凸字型断面を有して所定長に予め成形され
いてるものであり、第１図の平底円筒タンク１の
取合部４を環状に構成するユニツトであつて、溶
接に先立ち予めその周方向端面９に工場、或は、
現場にて成形時にドリル等にて半球状の丸形のス
ポツト状の座ぐり穴１０が穿設され、その深さ、
位置、サイズは予め理論計算、及び、実験により
溶接の溶け込みを充分になし得る見かけ上の板厚
を成すようにされている。 In the embodiment shown in FIG. 5, the profiled member 6 has an upwardly designed convex cross-section and is pre-formed to a predetermined length, and the connecting portion 4 of the flat-bottomed cylindrical tank 1 in FIG. 1 is annularly shaped. It is a component unit, and prior to welding, the circumferential end surface 9 is pre-heated in a factory or
A hemispherical round spot-shaped counterbore hole 10 is drilled with a drill etc. at the time of molding at the site, and its depth is determined by
The position and size are determined in advance by theoretical calculations and experiments so that the apparent plate thickness will allow sufficient weld penetration.
尚、図示態様に於いては図示の都合上開先は省
略してある。 Incidentally, in the illustrated embodiment, the groove is omitted for convenience of illustration.
而して、第３，４図同様に、底板３の外側縁に
該異形材６の底板部６″を突合せ溶接７をすると
共に該異形材６，６のユニツト相互を端面９，９
に対し突合せ溶接８を行う。 Then, as in FIGS. 3 and 4, the bottom plate portion 6'' of the odd-shaped member 6 is butt-welded to the outer edge of the bottom plate 3, and the units of the odd-shaped members 6, 6 are connected to each other by the end surfaces 9, 9.
Butt welding 8 is then performed.
この場合、該各端面９には上記スポツト状の座
ぐり穴１０，１０が第６図に示す様に、同一芯出
し部位で対向して設けられているため、溶接に際
し該スポツト状の座ぐり穴１０内に図示しないう
ら波を形成させて溶け込みを容易にし健全な溶接
を得るようにする。 In this case, each end face 9 is provided with spot-shaped counterbore holes 10, 10 facing each other at the same centering position as shown in FIG. A ridge (not shown) is formed in the hole 10 to facilitate penetration and obtain a sound weld.
勿論、該異形材６の一般部の端面は中実体であ
り、設定剛性にされ、運転中の各応力に充分耐え
得るようにされている。 Of course, the end face of the general portion of the profiled member 6 is solid and has a set rigidity so as to be able to sufficiently withstand various stresses during operation.
そして、環設された異形材６，６…の上部に側
板２を突合せ溶接７′を介して接合していく。 Then, the side plate 2 is joined to the upper part of the circular shaped members 6, 6, . . . through butt welding 7'.
又、第７，８図に示す実施例は溶接前に異形材
６の周方向端面にスポツト状の座ぐり孔10′を穿
設した後、該スポツト状の座ぐり１０′内側面に
端面９から設定深さだけ銅の裏当金１１を当接添
着させ、その後異形材６，６相互を突き合せ溶接
するようにした態様であり、当該実施例に於いて
は該銅の裏当金１１の熱容量により入熱が放熱さ
れスポツト状の座ぐり穴１０′内面へのうら波形
成による溶け込み良好さに加えて溶け込みがより
良好にされる。 In addition, in the embodiment shown in FIGS. 7 and 8, after a spot-shaped counterbore 10' is bored in the circumferential end surface of the profiled member 6 before welding, an end surface 9 is formed in the inner surface of the spot-shaped counterbore 10'. In this embodiment, a copper backing metal 11 is attached to a predetermined depth, and then the deformed members 6, 6 are butt-welded to each other. Heat input is dissipated due to the heat capacity of the spot-shaped counterbore hole 10', and the welding is improved in addition to the good welding caused by the formation of undulating waves on the inner surface of the spot-shaped counterbore 10'.
而して、上述２実施例の溶接完了後第９図に示
す様に、該穿設されたスポツト状の座ぐり穴１
０，１０′から異形材６の肉厚部の細孔１２を介
しパイプ１３に接続するようにしてHeガス、或
は、NH4ガスを供給してリークテストを行い、
溶接検査を行うことが可能である。 After the welding of the above-mentioned two embodiments is completed, as shown in FIG.
A leak test is performed by supplying He gas or NH 4 gas to the pipe 13 through the pore 12 in the thick wall of the profiled member 6 from 0 and 10'.
It is possible to perform welding inspections.
尚、この出願の発明の実施態様は上述各実施例
に限るものでないことは勿論であり、例えば、ス
ポツト状の座ぐり穴の穿設は対向する異形材の端
面の双方でなく、一方に形成させることも出来る
等種々の態様が採用可能であり、又、スポツト状
の座ぐり穴を複数併設することも可能であり、そ
して、対象とするタンクは常温、低温等各種平底
円筒タンクが可能である。 It goes without saying that the embodiments of the invention of this application are not limited to the above-mentioned embodiments. For example, the spot-shaped counterbore holes may be formed on one side of the opposing deformed members instead of on both end faces. It is possible to adopt a variety of configurations, such as allowing the tank to be cooled, and it is also possible to have multiple spot-like counterbore holes.The target tank can be a variety of flat-bottomed cylindrical tanks, such as room temperature and low temperature tanks. be.
＜発明の効果＞
以上、この出願の発明によれば、平底円筒タン
クの底板−側板の取合部に介設する断面凸字型異
形材の側方端面の突合せ溶接方法において、該異
形剤と底板との突合せ溶接に伴つて側方端面の突
合せ溶接を行うに際し、対向する端面の少くとも
一方の所定肉厚部位に半球状等のスポツト状の座
ぐり穴を穿設して後該座ぐり穴内面にうら波を形
成させて突合せ溶接するようにしたことにより、
溶接部の見かけ上の板厚が減少し、他の一般の中
実断面を運転中各種応力に対応する下位部分が下
向に漸増した肉厚にされ設計構造のままにしてお
いても、端面突合せ溶接部の見かけ上の板厚が薄
くされ、したがつて、うら波を形成させて良好な
溶け込みが形成され健全な継手とすることが出来
る優れた効果が奏される。<Effects of the Invention> As described above, according to the invention of this application, in a method for butt welding the side end surfaces of a profiled member with a convex cross section interposed at the bottom plate-side plate joint of a flat-bottomed cylindrical tank, the profile agent and When butt welding the side end faces in conjunction with butt welding with the bottom plate, a spot-shaped counterbore hole, such as a hemispherical one, is drilled in a predetermined thick part of at least one of the opposing end faces, and then the counterbore hole is By forming undulations on the inner surface of the hole and butt welding,
The apparent thickness of the welded part decreases, and the lower part that corresponds to various stresses during operation of other general solid sections has a thickness that gradually increases downward, and even if the design structure is left unchanged, the end face The apparent thickness of the butt welded portion is reduced, and as a result, undulations are formed, good penetration is formed, and a sound joint is produced.
更に、穿設したスポツト状の座ぐり穴の内面に
銅等の裏当金を添設させることにより、熱容量に
より熱放熱が行われ、溶け込みがより良く行われ
るという優れた効果が奏される。 Furthermore, by attaching a backing metal such as copper to the inner surface of the spot-shaped counterbore hole, heat is dissipated due to the heat capacity, and an excellent effect of better welding is achieved.
而して、このような見かけ上の板厚を薄くする
ことにより、溶接もし易く、加えて、スポツト状
の座ぐり穴にアンモニアガス等の送給孔を設ける
ことにより、リークテスト等の非破壊検査も出来
る効果もある。 By reducing the apparent thickness of the plate, it is easier to weld, and in addition, by providing a supply hole for ammonia gas, etc. in the spot-shaped counterbore, non-destructive tests such as leak tests can be carried out. It also has the effect of being tested.
そして、異形材の端面の座ぐり穴の穿設は予め
工場での成形時、或は、現場での溶接に際し容易
に行うことが出来る利点もあり、又、それだけ材
料費、消費源の上でプラスする効果もある。 Another advantage is that counterbore holes in the end faces of deformed materials can be easily made in advance during molding at the factory or during welding on site, and this also reduces material costs and consumption sources. There are also positive effects.
第１図は一般の平底円筒タンクの概略断面図、
第２図は従来技術に基づく取合部の溶接拡大断面
図、第３図は異形材の取合部の断面図、第４は同
Ａ視側面図、第５図以下はこの出願の発明の実施
例の説明図であり、第５図は１実施例の斜視図、
第６図は同端面突合せ溶接側面図、第７図は他の
実施例の断面図、第８図は同部分断面正面図、第
９図はガスリークテスト断面図である。
１……平底円筒タンク、２……側板、３……底
板、４……取合部、６……異形材、８……溶接、
９……端面、１１……裏当金、１０，１０′……
座ぐり穴。
Figure 1 is a schematic cross-sectional view of a general flat-bottomed cylindrical tank.
Fig. 2 is an enlarged welded sectional view of a joining part based on the prior art, Fig. 3 is a sectional view of a joining part of a deformed material, and Fig. 4 is a side view of the same as seen from A. FIG. 5 is an explanatory diagram of an embodiment; FIG. 5 is a perspective view of one embodiment;
6 is a side view of the same end face butt welding, FIG. 7 is a sectional view of another embodiment, FIG. 8 is a front view of the same partial section, and FIG. 9 is a sectional view of a gas leak test. 1...Flat bottom cylindrical tank, 2...Side plate, 3...Bottom plate, 4...Joint part, 6...Deformed material, 8...Welding,
9... End face, 11... Backing metal, 10, 10'...
Counterbore.
Claims (1)
異形材を突合せ溶接すると共に該異形材相互を突
合せ溶接し併せて該異形材上に側板を突合せ溶接
する取合部溶接方法において、該異形材相互の突
合せ溶接に際し、該対向異形材の凸字型端面の少
くとも一方にスポツト状の座ぐり穴を穿設して後
に、該座ぐり穴内面にうら波を形成させて溶接す
るようにしたことを特徴とする平底円筒タンクの
底板−側板取合部溶接方法。 ２ 平底円筒タンクの底板に対して断面凸字型の
異形材を突合せ溶接すると共に該異形材相互を突
合せ溶接し併せて該異形材上に側板を突合せ溶接
する取合部溶接方法において、該異形材相互の突
合溶接に際し、該対向異形材の凸字型端面の少く
とも一方にスポツト状の座ぐり穴を穿設し、而し
て該スポツト状の座ぐり穴内面に、裏当金を添設
して後に、座ぐり穴内面にうら波を形成して溶接
するようにしたことを特徴とする平底円筒タンク
の底板−側板取合部溶接方法。[Scope of Claims] 1. A joining part in which a profiled member with a convex cross section is butt-welded to the bottom plate of a flat-bottomed cylindrical tank, the profiled members are butt-welded to each other, and a side plate is butt-welded onto the profiled member. In the welding method, when butt welding the deformed materials, a spot-shaped counterbore hole is bored in at least one of the convex end surfaces of the opposing deformed materials, and then a ridge is formed on the inner surface of the counterbore hole. 1. A method for welding a bottom plate-side plate joint of a flat-bottomed cylindrical tank, characterized in that the welding is carried out at the bottom plate-side plate joint of a flat-bottomed cylindrical tank. 2. In a joint welding method in which a profiled member with a convex cross section is butt-welded to the bottom plate of a flat-bottomed cylindrical tank, the profiled members are butt-welded to each other, and a side plate is butt-welded on the profiled member. When butt welding the materials, a spot-shaped counterbore hole is bored in at least one of the convex end surfaces of the opposing profiled materials, and a backing metal is added to the inner surface of the spot-shaped counterbore hole. 1. A method for welding a bottom plate-side plate joint of a flat-bottomed cylindrical tank, characterized in that after the welding is performed, a ridge is formed on the inner surface of a counterbore hole and then welded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5122981A JPS57165186A (en) | 1981-04-07 | 1981-04-07 | Welding method for joining part between bottom plate and side plate of flat bottommed cylindrical tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5122981A JPS57165186A (en) | 1981-04-07 | 1981-04-07 | Welding method for joining part between bottom plate and side plate of flat bottommed cylindrical tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57165186A JPS57165186A (en) | 1982-10-12 |
| JPH0246306B2 true JPH0246306B2 (en) | 1990-10-15 |
Family
ID=12881111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5122981A Granted JPS57165186A (en) | 1981-04-07 | 1981-04-07 | Welding method for joining part between bottom plate and side plate of flat bottommed cylindrical tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57165186A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6284270B2 (en) * | 2014-04-17 | 2018-02-28 | ジャパンマリンユナイテッド株式会社 | Liquefied gas tank |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50153741A (en) * | 1974-06-03 | 1975-12-11 |
-
1981
- 1981-04-07 JP JP5122981A patent/JPS57165186A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50153741A (en) * | 1974-06-03 | 1975-12-11 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57165186A (en) | 1982-10-12 |
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