JPH026955B2 - - Google Patents
Info
- Publication number
- JPH026955B2 JPH026955B2 JP60051419A JP5141985A JPH026955B2 JP H026955 B2 JPH026955 B2 JP H026955B2 JP 60051419 A JP60051419 A JP 60051419A JP 5141985 A JP5141985 A JP 5141985A JP H026955 B2 JPH026955 B2 JP H026955B2
- Authority
- JP
- Japan
- Prior art keywords
- flange
- joint
- seal
- peripheral edge
- outer peripheral
- 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
- 230000007246 mechanism Effects 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 15
- 238000003466 welding Methods 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 description 22
- 239000012530 fluid Substances 0.000 description 12
- 230000007547 defect Effects 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Landscapes
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Description
【発明の詳細な説明】
〔技術分野〕
本発明は、フランジのシール機構、殊に、危検
物流体用配管フランジの完全シール機構に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a flange sealing mechanism, particularly to a complete sealing mechanism for a piping flange for hazardous fluid.
化学プラント等の各種工業設備においては各種
のフランジ接手が使用されている。特に近年で
は、危険物即ち可燃性の水素ガスやLPG、LNG、
液体空気、液体酸素及び液体窒素等の低温液化ガ
ス或は塩素やアンモニア等の有毒性のもの等種々
の流体を取扱う装置が増加し、それに応じた完全
シール機構のフランジ接手の開発が強く望まれて
いる。
Various types of flange joints are used in various industrial equipment such as chemical plants. Especially in recent years, hazardous materials such as flammable hydrogen gas, LPG, LNG,
As the number of devices that handle various fluids such as low-temperature liquefied gases such as liquid air, liquid oxygen, and liquid nitrogen, or toxic substances such as chlorine and ammonia is increasing, there is a strong desire to develop flange joints with a complete sealing mechanism. ing.
従来、このような目的のために、リツプシール
フランジやガスケツト付フランジを用いた機構が
適用されているが、未だ満足すべきものではなか
つた。リツプシールフランジを用いたシール機構
は、フランジの接合外表面を部分的に盛上げ、そ
の部分を溶接し、溶接部分にかかる応力を防止し
たシール機構である。このシール機構の場合、流
体の漏洩に関しては完全に防止することができる
が、第６図に示すように、リツプ部分の形状が複
雑であり、コストも高いという問題があつた。さ
らに、リツプシール機構の場合、製作上鋳造過程
において、リツプ部分にミクロシユリンケージ等
の欠陥が残存する可能性があり、この欠陥が連続
して生じた場合にそのフランジを用いれば、流体
が漏洩するおそれが有る。従つて、長期に亘り完
全なシールを維持するためには、フランジの製作
後に厳格な検査を要し、それと同時にミクロシユ
リンケージ等の欠陥が存在する部分には厳密な補
修を施さねばならない。加えて、リツプシールフ
ランジの材質が炭素鋼である場合、シール溶接部
の腐食が問題となり、その防食が重要なポイント
となるが、リツプシールフランジでは、形状が複
雑であることから、この腐食が大きな問題となつ
ていた。特に、海岸等、腐食性雰囲気にさらされ
る地域においては、防食金属の溶射を用いること
があるが、作業が著しく困難であると考えられ
る。また、ガスケツト使用フランジを用いたシー
ル機構では、その接合面の形状には種々改良が見
られるものの、いずれの場合も、使用中に間隙を
生じたり、ガスケツト劣化による漏洩が生じる等
の欠点があり、完全シールの点で満足すべきもの
ではなかつた。 Conventionally, mechanisms using lip seal flanges or flanges with gaskets have been used for this purpose, but these have not yet been satisfactory. A sealing mechanism using a lip seal flange is a sealing mechanism in which the outer joint surface of the flange is partially raised and then welded to prevent stress from being applied to the welded portion. In the case of this seal mechanism, fluid leakage can be completely prevented, but as shown in FIG. 6, there are problems in that the shape of the lip portion is complicated and the cost is high. Furthermore, in the case of a lip seal mechanism, there is a possibility that defects such as microsyllable linkages may remain in the lip part during the manufacturing and casting process, and if these defects occur continuously, fluid may leak if the flange is used. There is a risk. Therefore, in order to maintain a perfect seal over a long period of time, strict inspection is required after the flange is manufactured, and at the same time, strict repairs must be made to areas where defects such as micro-syringes exist. In addition, when the material of the lip seal flange is carbon steel, corrosion of the seal weld becomes a problem, and corrosion prevention is an important point. Corrosion was a major problem. Particularly in areas exposed to corrosive atmospheres, such as coastlines, thermal spraying of anticorrosive metals is sometimes used, but this work is considered to be extremely difficult. In addition, although various improvements have been made in the shape of the joint surfaces of sealing mechanisms using flanges that use gaskets, in each case, there are drawbacks such as gaps being created during use and leakage occurring due to gasket deterioration. However, the complete seal was not satisfactory.
本発明は、前記した従来のフランジシール機構
に見られる欠点を改良することを目的とし、特
に、リツプシールフランジの完全シール性を保持
しつつ、リツプシールフランジに見られる上記問
題点を解決することを目的とする。
The present invention aims to improve the drawbacks seen in the conventional flange seal mechanism described above, and in particular, solves the above problems seen in lip seal flanges while maintaining the complete sealing performance of the lip seal flange. The purpose is to
本発明によれば、フランジ接手を用いたシール
機構において、接合される各接手フランジの接合
面の外周縁部のみをガスケツト面状に平面加工
し、ボルト手段により軸方向に締付け、金属接触
により相互に密接させると共に、該接合面の外周
を溶接によりシールしたことを特徴とするフラン
ジのシール機構が提供される。
According to the present invention, in a sealing mechanism using a flange joint, only the outer peripheral edge of the joint surface of each joint flange to be joined is flattened into a gasket surface shape, and the parts are tightened in the axial direction by bolt means and mutually connected by metal contact. Provided is a flange sealing mechanism characterized in that the outer periphery of the joint surface is sealed by welding.
一般に、フランジの接合面を合せた場合、通常
の製造により得られるフランジでは、製造誤差が
生じたり、仕上げ加工法により接合面に微小の間
隙が生ずる。例えば、第５図に示したように、最
悪のケースでは内周縁部分のみが接し、外周縁方
向につれて間隙が広がることになる。このため、
従来からのフランジを単に合せて外周を溶接した
場合には、ボルトの締付け、取りはずしにより溶
接部分に応力が集中し、溶接部分でのクラツクが
発生する可能性が大きく完全シールを達成できな
い場合も起り得る。また、接触面が広いと、ボル
ト締めの時にかかる過大な圧縮荷重、ボルトを外
した時の接触面の反発による引張荷重が溶接部に
かかり、その繰返しにより溶接部分にクラツクが
発生する可能性もある。さらにまた、接合面全体
を精密仕上げに行うことは、コスト高となり実用
的でない。 Generally, when the joint surfaces of flanges are brought together, manufacturing errors occur in flanges obtained through normal manufacturing, and minute gaps are created in the joint surfaces due to finishing methods. For example, as shown in FIG. 5, in the worst case, only the inner peripheral edge portions touch, and the gap widens toward the outer peripheral edge. For this reason,
If conventional flanges are simply aligned and the outer periphery is welded, stress will be concentrated on the welded area due to the tightening and removal of bolts, and there is a high possibility that cracks will occur at the welded area, making it impossible to achieve a complete seal. obtain. In addition, if the contact surface is wide, an excessive compressive load is applied when tightening the bolt, and a tensile load due to the rebound of the contact surface when the bolt is removed is applied to the weld, and the repetition of this process can cause cracks in the weld. be. Furthermore, it is not practical to precisely finish the entire joint surface due to high costs.
このため、本発明のフランジシール機構におい
ては、使用するフランジ接手の接合面の外周縁部
のみをガスケツト面状に平面加工したことを特徴
とする。第１図に、本発明で用いるフランジ接手
の接合面の側断面図を示し、第２図にその正面図
を示す。第２図は第１図の矢印Ａ−Ａ方向から見
た部分正面図である。 Therefore, the flange seal mechanism of the present invention is characterized in that only the outer peripheral edge of the joint surface of the flange joint used is flattened into a gasket surface shape. FIG. 1 shows a side sectional view of a joint surface of a flange joint used in the present invention, and FIG. 2 shows a front view thereof. FIG. 2 is a partial front view seen from the direction of arrow A--A in FIG.
第１図及び第２図において、フランジ接手１の
接合面は、平面加工された外周縁部２と、未平面
加工の内心部３とからなり、外周縁部は平面加工
され、その表面粗さはガスケツト面状であればよ
く、一般的には約±0.05mm以内に保持される。な
お、ここでいうガスケツト面状とは、平形金属ガ
スケツト、リングジヨイントガスケツト等、金属
接触によつて耐圧・気密性を得ることを目的とし
たガスケツトに施されているものと同等の仕上げ
面を言う。本発明の場合、接合面における外周縁
部２と内心部３との割合は、接合面の面圧が使用
される配管内の（内圧×ガスケツト係数）以上と
なるようにすればよく、その具体的割合は、ボル
トによる締付け強度等使用条件によつて異なり、
一義的には定められない。従つて、使用条件に応
じ適宜選択することができるが、例えば、LPG
の配管の場合には、通常、距離ｌ−１とｌ−２と
の比（ｌ−１／ｌ−２）で、1/1.8〜1/5.4であ
る。なお、図面において、５はボルト孔、４は流
体通路を示す。このような形状の接合面を有する
フランジは、その接合面を相互に金属接触により
密接し、軸方向にボルト手段により締付け、フラ
ンジ接合面の外周を溶接によりシールすることに
よつて、目的のシール機構を得ることができる。
この場合、溶接にあたつては、予じめフランジを
ボルト手段によつて使用条件に応じて締付け、そ
の後溶接する個所のボルトを部分的に外して溶接
した後、再びボルト締を行い、これを順次全接合
面の外周に亘つて繰返す方法を採るのが良い。こ
の様にすることにより使用条件下で溶接部にかか
る応力を最小にすることができる。第３図に、本
発明のフランジ接手の１例について、そのシール
機構の説明断面図を示す。第３図において、６は
ボルト、７は溶接シール部である。また、２′は
完全に面接触した外周縁部２の接触部であり、
３′は不完全接触の内心部３の間に形成される間
隙部である。第４図に、本発明の他のフランジ接
手の例の側断面図を示す。第４図のフランジは、
バルブボンネツトフランジであり、芯出しのため
その一対のフランジａの一方の接合面の外周縁部
２は凸状に形成され、他方のフランジｂの接合面
はそれに対応して凹状に形成される。第４図にお
いて、２′は完全に面接触した外周縁部２の接触
部であり、３′は不完全接触の内心部３の間に形
成される間隙部である。 In FIGS. 1 and 2, the joint surface of the flange joint 1 consists of an outer peripheral edge 2 that has been flattened and an inner core 3 that has not been flattened. It only needs to be in the shape of a gasket surface, and is generally kept within about ±0.05 mm. Note that the gasket surface finish here refers to a finished surface equivalent to that applied to gaskets intended to achieve pressure resistance and airtightness through metal contact, such as flat metal gaskets and ring joint gaskets. say. In the case of the present invention, the ratio of the outer periphery 2 and the inner core 3 of the joint surface may be such that the surface pressure of the joint surface is greater than or equal to (internal pressure x gasket coefficient) in the pipe in which it is used. The percentage varies depending on usage conditions such as the tightening strength of bolts.
It cannot be determined uniquely. Therefore, it can be selected as appropriate depending on the usage conditions, but for example, LPG
In the case of piping, the ratio of the distances l-1 to l-2 (l-1/l-2) is usually 1/1.8 to 1/5.4. In the drawings, 5 indicates a bolt hole and 4 indicates a fluid passage. A flange having a joint surface of such a shape can be used to achieve the desired seal by bringing the joint surfaces into close contact with each other through metal contact, tightening them in the axial direction with bolts, and sealing the outer periphery of the flange joint surface by welding. You can get the mechanism.
In this case, when welding, first tighten the flange with bolts according to the usage conditions, then partially remove the bolts at the location to be welded, weld, and then tighten the bolts again. It is preferable to adopt a method in which the steps are sequentially repeated over the outer periphery of the entire joint surface. By doing so, the stress applied to the weld under the conditions of use can be minimized. FIG. 3 shows an explanatory sectional view of the sealing mechanism of an example of the flange joint of the present invention. In FIG. 3, 6 is a bolt and 7 is a weld seal portion. Moreover, 2' is a contact part of the outer peripheral edge part 2 that is in complete surface contact,
3' is a gap formed between the inner core parts 3 that are in incomplete contact. FIG. 4 shows a side sectional view of another example of the flange joint of the present invention. The flange in Figure 4 is
This is a valve bonnet flange, and for centering purposes, the outer peripheral edge 2 of the joint surface of one of the pair of flanges a is formed in a convex shape, and the joint surface of the other flange b is formed in a correspondingly concave shape. . In FIG. 4, 2' is a contact portion of the outer peripheral edge 2 that is in complete surface contact, and 3' is a gap formed between the inner core portions 3 that are in incomplete contact.
本発明で用いるフランジにおいて、その接合面
は、前記のように、平面加工された外周縁部２と
未平面加工の内心部３とに形成され、その平面加
工された外周縁部２は、ガスケツト面として作用
するガスケツト面状のもので、第３図に示すよう
に、各フランジを密接させた場合、各フランジ
は、その外周縁部２において完全に面接触する。
これに対し、未平面加工の内心部３は、第３図及
び第４図に示すように、完全面接触せずに、間隙
部３′を生じる。この間隙部３′のギヤツプは、外
周縁部２の完全面接触が達成できる程度でかつフ
ランジの強度に影響を与えない程度であり、通
常、0.5〜１mm程度である。 In the flange used in the present invention, as described above, the joint surface is formed between the flattened outer peripheral edge 2 and the non-flattened inner core 3, and the flattened outer peripheral edge 2 is connected to the gasket. The gasket is shaped like a gasket and acts as a surface, and as shown in FIG. 3, when the flanges are brought into close contact with each other, the flanges come into complete surface contact at their outer peripheral edges 2.
On the other hand, as shown in FIGS. 3 and 4, the unplanar inner core portion 3 does not come into complete surface contact, but creates a gap 3'. The gap of this gap 3' is such that complete surface contact of the outer peripheral edge 2 can be achieved and does not affect the strength of the flange, and is usually about 0.5 to 1 mm.
本発明のフランジは、次のようにして作成する
ことができる。 The flange of the present invention can be created as follows.
(1) 先ず、フランジの接合面を、所望の接合断面
が得られるように、例えば、第３図（ラインフ
ランジ）又は、第４図（バルブボンネツトフラ
ンジ）に示した側断面が得られるように粗切削
する。この場合、第３図に示すラインフランジ
では、外周縁部２が内心部３よりも凸面を形成
するようにする。また、第４図に示すバルブボ
ンネツトフランジでは、芯出しのため一方のフ
ランジａ接合面を、外周縁部２が内面部３より
も凸面を形成するようにし、他方のフランジｂ
接合面を、それに対応して外周縁部２が内面部
３よりも凹面を形成するようにする。(1) First, the joint surface of the flange is cut so that the desired joint cross section is obtained, for example, the side cross section shown in Fig. 3 (line flange) or Fig. 4 (valve bonnet flange). Rough cutting. In this case, in the line flange shown in FIG. 3, the outer peripheral edge 2 is made to form a more convex surface than the inner core 3. In addition, in the valve bonnet flange shown in FIG. 4, for centering purposes, one of the flange a joint surfaces is formed such that the outer peripheral edge 2 forms a more convex surface than the inner surface 3, and the other flange b
The joint surfaces are made such that the outer peripheral edge 2 forms a correspondingly more concave surface than the inner surface 3.
(2) 前記で得た外周縁部２をガスケツト面状に平
面加工する。(2) Flatten the outer peripheral edge 2 obtained above into a gasket surface.
本発明のフランジシール機構は、前記構成であ
つて、そのフランジ接合面は、その外周縁部２が
平面加工され、ガスケツトとして作用することか
ら、外周縁部２における相互の接触は完全であ
り、また、接合面積の減少によつても、残存面圧
値は（配管内内圧×ガスケツト係数）以上となる
ため完全なシールを得ることができる。その上、
本発明の場合は、そのフランジ接合面の外周を溶
接によりシールしたことから、流体に対するシー
ルは完全であり、内部流体がその接合面から外部
に漏出するようなことは絶対にない。従つて、本
発明のシール機構においては、リツプ部を有しな
いにもかかわらず、従来のリツプフランジシール
と同様に完全にシールすることができ、さらに構
造が簡単であり、検査が容易であることから、コ
ストが低く、かつ製作上、リツプフランジの製造
の鋳造過程で問題となつていたミクロシユリンケ
ージ等の欠陥が連続して発生し、シール部を貫通
する可能性が殆どなく、工業上極めて効果的であ
ると同時に安全性の上でも優れ、極めて有用であ
る。また、従来法によつて得られたガスケツトフ
ランジとは異なり、ボルト手段により、フランジ
を軸方向に締付けた時に、その応力は、フランジ
接合面のガスケツト面状に平面加工された外周縁
部２に作用し、面圧保持が確実となり、その上、
従来のリツプフランジシール機構等に比較して、
接触面積の減少によつて接触面の反発による引張
荷重が低下し、また圧縮荷重も減少するため、ボ
ルトの締付け、取外しによる溶接部での繰返し荷
重が軽減され、溶接シール部にクラツクが入るよ
うな問題もない。また、フランジの接合面は、そ
の外周縁部２において完全面接触の状態にあるた
め、フランジをいつたん軸方向にボルト締めする
と、そのボルト締めによる圧縮荷重はそのボルト
締めを解除するまで常に保持され、運転中の内部
流体の圧力変動及び流体温度の変化により生じる
フランジ接合面での引張応力に抗してその接触面
には十分な圧縮荷重を残存させることができる。
しかも、外周縁部２の溶接部への伝達を遮断する
ことができる。これらのことから、溶接部には運
転中においても引張応力は付加されず、溶接部の
疲労劣化が防止される。さらにまた、本発明によ
るフランジは構造が簡単であるため、溶接部の防
食も容易に行うことができる。
The flange seal mechanism of the present invention has the above-mentioned configuration, and since the outer peripheral edge 2 of the flange joint surface is flat-processed and acts as a gasket, the mutual contact at the outer peripheral edge 2 is perfect. Furthermore, even if the joint area is reduced, the residual surface pressure value will be equal to or higher than (internal pressure in the pipe x gasket coefficient), so a perfect seal can be obtained. On top of that,
In the case of the present invention, since the outer periphery of the flange joint surface is sealed by welding, the seal against fluid is perfect, and the internal fluid will never leak outside from the joint surface. Therefore, although the sealing mechanism of the present invention does not have a lip portion, it can seal completely like a conventional lip flange seal, and has a simple structure and is easy to inspect. Therefore, the cost is low, and there is almost no possibility that defects such as micro-syringe linkage, which were a problem during the casting process of manufacturing lip flanges, will occur continuously and penetrate the seal, making it extremely difficult to manufacture from an industrial perspective. It is both effective and safe, making it extremely useful. In addition, unlike gasket flanges obtained by conventional methods, when the flange is tightened in the axial direction by bolt means, the stress is absorbed by the outer peripheral edge 2, which is flattened into the gasket surface shape of the flange joint surface. This ensures that the surface pressure is maintained, and in addition,
Compared to conventional lip flange seal mechanisms, etc.
By reducing the contact area, the tensile load due to the rebound of the contact surface is reduced, and the compressive load is also reduced, which reduces the repetitive load on the weld due to bolt tightening and removal, and prevents cracks from forming in the weld seal. There are no problems. In addition, since the joint surfaces of the flanges are in complete surface contact at the outer peripheral edge 2, once the flanges are bolted in the axial direction, the compressive load caused by the bolting is always maintained until the bolting is released. This allows a sufficient compressive load to remain on the contact surface against the tensile stress at the flange joint surface caused by pressure fluctuations in the internal fluid and changes in fluid temperature during operation.
Moreover, the transmission of heat to the welded portion of the outer peripheral edge portion 2 can be blocked. For these reasons, no tensile stress is applied to the welded part even during operation, and fatigue deterioration of the welded part is prevented. Furthermore, since the flange according to the present invention has a simple structure, corrosion protection of the welded portion can be easily performed.
本発明のフランジシール機構は、LPG、LNG、
液体空気、液体酸素及び液体窒素等の低温流体を
導く配管用のフランジ部の完全シールに適用され
る他、水素ガス等の漏洩しやすいガス或は塩素、
アンモニア等の有毒性流体を導く配管用のフラン
ジ部の完全シールに適用することができる。 The flange seal mechanism of the present invention is suitable for LPG, LNG,
In addition to being applied to complete sealing of piping flanges that conduct low-temperature fluids such as liquid air, liquid oxygen, and liquid nitrogen, it is also used for leak-prone gases such as hydrogen gas, chlorine,
It can be applied to completely seal the flange part of piping that leads toxic fluids such as ammonia.
本発明によるフランジと同等のシール部を有す
る模擬試験材を、通常ポンプ等の脈動によつて生
じる圧力を想定して行う破壊試験より厳しい条件
である繰返し圧縮試験、即ち、使用条件によるボ
ルトの開け締めの繰返しを20回行つた。その結果
は、溶接部に割れ等の欠陥の発生は全くなかつ
た。
A simulated test material having a seal portion equivalent to the flange according to the present invention is subjected to a repeated compression test, which is more severe than a destructive test that assumes the pressure generated by the pulsation of a pump, etc., in which bolts are opened according to usage conditions. Repeat the closing 20 times. The results showed that there were no defects such as cracks in the welded area.
また、本発明のフランジの溶接に際し、故意に
タングステンを入れる等して溶接欠陥を生じさ
せ、上記のボルトの開け締めによる破壊試験を同
様に行つた。この場合においても溶接欠陥からの
２次欠陥の発展もなかつた。 In addition, when welding the flanges of the present invention, welding defects were caused by intentionally adding tungsten, etc., and the same destructive test by opening and tightening the bolts as described above was conducted. In this case as well, there was no development of secondary defects from weld defects.
第１図は、ラインフランジ接合部の側断面図、
第２図はその正面図を示す。第３図は、そのライ
ンフランジを用いて形成したシール機構の説明断
面図を示す。第４図は、バルブボンネツトフラン
ジの側断面図を示す。第５図は従来のラインフラ
ンジの接合断面説明図を示す。第６図は従来のリ
ツプシールフランジの断面図を示す。
１……フランジ、２……フランジ接合外周縁
部、３……フランジ接合内心部、４……流体通
路、５……ボルト孔、６……ボルト、７……溶接
シール部。
Figure 1 is a side sectional view of the line flange joint;
FIG. 2 shows its front view. FIG. 3 shows an explanatory sectional view of a seal mechanism formed using the line flange. FIG. 4 shows a side sectional view of the valve bonnet flange. FIG. 5 shows an explanatory diagram of a joint cross section of a conventional line flange. FIG. 6 shows a cross-sectional view of a conventional lip seal flange. DESCRIPTION OF SYMBOLS 1... Flange, 2... Flange joint outer peripheral edge, 3... Flange joint inner part, 4... Fluid passage, 5... Bolt hole, 6... Bolt, 7... Weld seal part.
Claims (1)
接合される各接手フランジの接合面の外周縁部の
みをガスケツト面状に平面加工し、ボルト手段に
より軸方向に締付け、金属接触により相互に密接
させると共に、該接合面の外周を溶接によりシー
ルしたことを特徴とするフランジのシール機構。1 In a sealing mechanism using a flange joint,
Only the outer periphery of the joint surface of each joint flange to be joined was flattened into a gasket surface shape, tightened in the axial direction by bolt means, brought into close contact with each other by metal contact, and the outer periphery of the joint surface was sealed by welding. A flange sealing mechanism characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60051419A JPS61211588A (en) | 1985-03-14 | 1985-03-14 | Seal mechanism of flange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60051419A JPS61211588A (en) | 1985-03-14 | 1985-03-14 | Seal mechanism of flange |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61211588A JPS61211588A (en) | 1986-09-19 |
| JPH026955B2 true JPH026955B2 (en) | 1990-02-14 |
Family
ID=12886403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60051419A Granted JPS61211588A (en) | 1985-03-14 | 1985-03-14 | Seal mechanism of flange |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61211588A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4853656B2 (en) * | 2007-03-12 | 2012-01-11 | 住友電気工業株式会社 | Sealing structure of superconducting cable junction box |
| JP2008274352A (en) * | 2007-04-27 | 2008-11-13 | Ihi Corp | Sealing complement method, metal member repair method, and metal defect repair device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57101189A (en) * | 1980-12-13 | 1982-06-23 | Chiyoda Chem Eng Construct Co | Seal mechanism of low temperature flange |
| JPS5934783U (en) * | 1982-08-26 | 1984-03-03 | リツカ−株式会社 | sewing machine needle bar drive device |
-
1985
- 1985-03-14 JP JP60051419A patent/JPS61211588A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57101189A (en) * | 1980-12-13 | 1982-06-23 | Chiyoda Chem Eng Construct Co | Seal mechanism of low temperature flange |
| JPS5934783U (en) * | 1982-08-26 | 1984-03-03 | リツカ−株式会社 | sewing machine needle bar drive device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61211588A (en) | 1986-09-19 |
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