JP7144503B2 - Special penetration piece for low-temperature piping - Google Patents

Special penetration piece for low-temperature piping Download PDF

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JP7144503B2
JP7144503B2 JP2020212019A JP2020212019A JP7144503B2 JP 7144503 B2 JP7144503 B2 JP 7144503B2 JP 2020212019 A JP2020212019 A JP 2020212019A JP 2020212019 A JP2020212019 A JP 2020212019A JP 7144503 B2 JP7144503 B2 JP 7144503B2
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志郎 古賀
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Shin Kurushima Dockyard Co Ltd
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Description

本発明は、ＬＮＧ燃料船のＬＮＧ低温配管の船殻部材貫通部及びタイト壁貫通部に使用する低温配管用特殊貫通ピースに関する。 TECHNICAL FIELD The present invention relates to a special penetration piece for cryogenic piping used for hull member penetrations and tight wall penetrations of LNG cryogenic piping of an LNG fueled ship.

この種の低温配管用特殊貫通ピースに関しては、例えば、特開平７－９８０７９号公報に開示のものが知られている。
特開平７－９８０７９号公報の開示は、発明名称「低温タンクの配管用貫通ピース」に係り、「大きな熱応力の発生を防止し、形状が簡単で工作，溶接及び検査が容易な信頼性の大きい低温タンクの配管用貫通ピースを提供することを目的とする」発明解決課題において（同公報明細書段落番号０００４参照）、「低温流体が内部を流れるパイプと、同パイプが貫通するタンク壁とを接続する配管用貫通ピースにおいて、上記パイプに接続される同径の短管の外周央部に軸方向の適長にわたって一体的にかつ同軸的に形成された外径肥大部と、上記外径肥大部の外周面央部に形成され上記タンク壁に穿設された貫通孔に強固に溶接される溶接部とを具えた」構成とすることにより(同公報特許請求の範囲請求項１の記載等参照）、「（１）・・・従来必要であった切断，溶接，検査といった複雑な工程及び検査を省略でき、工作の容易化によるコスト低減とシンプルな形状による信頼性の向上が期待できる。（２）・・・材料費の歩留まり向上によるコスト低減効果が期待できる。」等の効果を奏するものである(同公報明細書段落番号００１５参照）。 For example, JP-A-7-98079 discloses a special penetration piece for low-temperature piping of this type.
The disclosure of Japanese Patent Application Laid-Open No. 7-98079 relates to the invention title "penetration piece for piping of low-temperature tank", and "prevents the generation of large thermal stress, has a simple shape, and is easy to work, weld and inspect. The object of the invention is to provide a through-piece for piping of a large cryogenic tank. a pipe penetration piece for connecting a pipe, an outer diameter enlarged portion integrally and coaxially formed over an appropriate length in the axial direction at the outer peripheral center portion of a short pipe of the same diameter connected to the pipe; and a welded portion that is formed in the center of the outer peripheral surface of the enlarged portion and is firmly welded to the through hole drilled in the tank wall (described in claim 1 of the same publication). etc.), "(1)... Complicated processes and inspections such as cutting, welding and inspection that were conventionally required can be omitted, and cost reduction due to easier work and improved reliability due to simple shape can be expected. (2) .

図３（Ａ）（Ｂ）は、特開平７－９８０７９号公報に図１として添付されるＬＮＧタンクのドーム貫通ピースに適用した開示発明の第１実施例を示す全体縦断面図及び部分拡大図であり、図３（Ａ）（Ｂ）において、符号１０１は、貫通継手（ピース）、１０１ａは、継手短管部、１０１ｂは、外径肥大部、１０２は、ドーム壁（タンク壁）である（符号は、先行技術であることを明らかにするために、本願出願人において、３桁に変更して説明した。）。 3(A) and 3(B) are an overall vertical cross-sectional view and a partially enlarged view showing a first embodiment of the disclosed invention applied to a dome penetration piece of an LNG tank attached as FIG. 1 to Japanese Patent Application Laid-Open No. 7-98079. 3A and 3B, reference numeral 101 is a through joint (piece), 101a is a joint short tube portion, 101b is an enlarged outer diameter portion, and 102 is a dome wall (tank wall). (The code has been changed to three digits by the applicant in order to clarify that it is prior art.).

しかしながら、特開平７－９８０７９号公報に開示の発明は、「ＬＮＧタンクドーム貫通ピース」に適用するを前提とするものであり、配管温度マイナス１６３℃の低温配管を船殻部材(SS鋼材)に熱伝播させず貫通するものではない。
そして、ＬＮＧ燃料船等の船殻部材たるタイト壁面の貫通部に低温配管を施工する場合には、当該貫通部に突合せ継ぎ手を配置する施工が必要となるが、同継ぎ手の貫通ピース内で船級規則が要求する非破壊試験を実施は、およそ不可能である。 However, the invention disclosed in Japanese Patent Application Laid-Open No. 7-98079 is based on the premise that it is applied to the "LNG tank dome penetration piece", and the low-temperature pipe with a pipe temperature of -163 ° C is applied to the hull member (SS steel material). It does not penetrate through without heat propagation.
When constructing low-temperature piping in the penetration part of the tight wall, which is the hull member of an LNG fueled ship, etc., it is necessary to install a butt joint in the penetration part. It is nearly impossible to conduct non-destructive testing as required by the regulations.

特開平７－９８０７９号公報JP-A-7-98079

そこで、本願発明は、配管温度マイナス１６３℃の低温配管を船殻部材(SS鋼材)に熱伝播させず貫通させることができ、タイト壁貫通部での非破壊試験の実施を要することのない低温配管用特殊貫通ピースを提供することを目的とする。 Therefore, the present invention is capable of penetrating a low-temperature pipe with a pipe temperature of minus 163 ° C without heat propagation to the hull member (SS steel material), and a low-temperature pipe that does not require non-destructive testing at the tight wall penetrating part. The object is to provide a special penetration piece for piping.

上記課題を解決するために、本願請求項１に係る発明は、ＬＮＧ燃料船のＬＮＧ低温配管の船殻部材貫通部及びタイト壁貫通部に使用する低温配管用特殊貫通ピースであって、通しフランジにのみ接合される低温配管と、貫通する壁面の貫通開孔に接合される壁側フランジと、壁側フランジと接合される呼び出し管型貫通ピースと、呼び出し管型貫通ピースと接合される配管側中フランジと、呼び出し管型貫通ピースの配管側中フランジと通しフランジとの間にＰＴＦＥ製断熱パッキンシートと、を有することを特徴とする。
また、本願請求項２に係る発明は、前記請求項１に記載の低温配管用特殊貫通ピースにおいて、呼び出し管型貫通ピースが熱伝搬が少ない低温適合鋼材のＳＵＳ３１６Ｌ材質であることを特徴とする。
In order to solve the above problems, the invention according to claim 1 of the present application is a special penetration piece for low-temperature piping used for hull member penetrations and tight wall penetrations of LNG low-temperature piping of an LNG fueled ship, which is a through-flange a wall-side flange that is joined to the through-hole of the through-wall wall, a call- pipe -type penetration piece that is joined to the wall-side flange, and a pipe-side that is joined to the call-pipe-type penetration piece It is characterized by having a middle flange and a PTFE heat insulating packing sheet between the pipe side middle flange and the through flange of the call pipe type penetration piece.
The invention according to claim 2 of the present application is characterized in that, in the special penetration piece for low-temperature piping according to claim 1, the call pipe-type penetration piece is made of SUS316L material, which is a low-temperature compatible steel material with little heat transfer.

上記のような構成としたので、本発明に係る低温配管用特殊貫通ピースにおいては、貫通ピースの材質を熱伝搬が少ない低温適合鋼材のＳＵＳ３１６Ｌを使用し、かつ、両端フランジの接触域を少なくし、さらに、配管側中フランジ７と通しフランジ９との間をＰＴＦＥ製断熱パッキンシート８を介する分離する接合構造としたので、次の効果を奏する。
（１）低温配管から貫通ピースを通じ熱伝播が発生し、船殻部材（図示外）及びタイト壁が脆性破壊を起こすことを避けることができる。
（２）低温配管の貫通ピース５との接合フランジ７、９は、通しフランジ形状とすることで低温配管に継ぎ手を設ける必要がなくなり、このため、フランジ部のドリップトレイも不要となる。
（３）貫通ピース部での突合せ継ぎ手自体が不要となるので、貫通ピース内での非破壊試験を要することもない。
（４）従来施工が不可能だった低温配管貫通が施工可能となった。 Since it is configured as described above, in the special through piece for low temperature piping according to the present invention, the material of the through piece is SUS316L, which is a low temperature compatible steel material with little heat transfer, and the contact area between the flanges at both ends is reduced. Furthermore, the joining structure is such that the pipe-side middle flange 7 and the through flange 9 are separated through the PTFE heat insulation packing sheet 8, so that the following effects are obtained.
(1) It is possible to avoid brittle fracture of hull members (not shown) and tight walls due to heat propagation from the cold pipe through the penetration piece.
(2) The connection flanges 7 and 9 to the through-piece 5 of the low-temperature pipe are formed in a through-flange shape so that there is no need to provide a joint in the low-temperature pipe, and therefore a drip tray for the flange portion is also unnecessary.
(3) Since a butt joint itself is not required at the penetrating piece, no non-destructive test is required within the penetrating piece.
(4) Low-temperature pipe penetration, which was previously impossible, is now possible.

図１は、本発明に係る低温配管用特殊貫通ピースを実施するための実施例１に係る低温配管用特殊貫通ピースの全体概略を示す部分断面図である。FIG. 1 is a partial cross-sectional view showing an overall outline of a special piercing piece for low-temperature piping according to a first embodiment for carrying out the special piercing piece for low-temperature piping according to the present invention. 図２（Ａ）は、貫通ピース本体概略図、図２（Ｂ）は、ＰＴＦＥ製断熱パッキンシートの概略図、図２（Ｃ）は、低温配管に通しフランジが接合された配管側概略図である。Fig. 2(A) is a schematic diagram of the main body of the penetration piece, Fig. 2(B) is a schematic diagram of the PTFE heat insulating packing sheet, and Fig. 2(C) is a schematic diagram of the pipe side in which the through flange is joined to the low-temperature pipe. be. 図３（Ａ）（Ｂ）は、特開平７－９８０７９号公報に図１として添付されるＬＮＧタンクのドーム貫通ピースに適用した開示発明の第１実施例を示す全体縦断面図及び部分拡大図である。3(A) and 3(B) are an overall vertical cross-sectional view and a partially enlarged view showing a first embodiment of the disclosed invention applied to a dome penetration piece of an LNG tank attached as FIG. 1 to Japanese Patent Application Laid-Open No. 7-98079. is.

本発明に係る低温配管用特殊貫通ピースを実施するための形態として一実施例を示す図面に基づき詳細に説明する。 A detailed description will be given with reference to the drawings showing one embodiment as a form for carrying out the special penetration piece for low-temperature piping according to the present invention.

図１は、本発明に係る低温配管用特殊貫通ピースを実施するための実施例１に係る低温配管用特殊貫通ピースの全体概略を示す部分断面図であり、図２（Ａ）（Ｂ）は、図１に示す実施例１に係る低温配管用特殊貫通ピースを分解概略図であり、図２（Ａ）は、貫通ピース本体概略図、図２（Ｂ）は、ＰＴＦＥ（ポリテトラフルオロエチレン：(polytetrafluoroethylene）製断熱パッキンシートの概略図、図２（Ｃ）は、低温配管に通しフランジが接合された配管側概略図である。 FIG. 1 is a partial cross-sectional view showing an overall outline of a special piercing piece for low-temperature piping according to a first embodiment for carrying out the special piercing piece for low-temperature piping according to the present invention, and FIGS. 1 and 2 are schematic exploded views of a special penetration piece for low-temperature piping according to Example 1 shown in FIG. 1, FIG. FIG. 2(C) is a schematic view of a (polytetrafluoroethylene) heat insulating packing sheet, and FIG.

図１、図２（Ａ）～（Ｃ）において、符号１は、本実施例１に係る低温配管用特殊貫通ピース、２は、ＳＳ鋼材の船殻部材からなるタイト壁面、３（３ａ－３ｂ）は、タイト壁面２に開けられた３ａー３ｂの径の貫通開孔、４は、低温配管、５は、呼び出し管型貫通ピース、６は、呼び出し管型貫通ピースの壁側フランジ、７は、配管側中フランジ、８は、ＰＴＦＥ製断熱パッキンシート、９は、低温配管４に接合される通しフランジである。 In FIGS. 1 and 2 (A) to (C), reference numeral 1 denotes a special penetration piece for low-temperature piping according to the first embodiment, 2 denotes a tight wall made of SS steel hull members, 3 (3a-3b ) is a through hole with a diameter of 3a-3b opened in the tight wall surface 2, 4 is a low temperature pipe, 5 is a call pipe type through piece, 6 is a call pipe type through piece wall side flange, 7 is a , pipe side middle flange, 8 is a PTFE heat insulating packing sheet, and 9 is a through flange joined to the low-temperature pipe 4 .

図１、図２（Ａ）（Ｂ）から明らかなように、本実施例１に係る低温配管用特殊貫通ピース１においては、呼び出し管型貫通ピース５を低温適合鋼材であるＳＵＳ３１６Ｌを使用し、図２（Ａ）（Ｂ）に示すように、貫通ピース５と低温配管４を熱伝搬を低減する分離構造としたものである。このため、図１、図２（Ａ）（Ｂ）から明らかなように、貫通ピース５の形状を配管側中フランジ７を有する呼び出し管型として,この面からも熱伝播を低減させる構造としたものである。 As is clear from FIGS. 1, 2A, and 2B, in the special penetration piece 1 for low-temperature piping according to the first embodiment, the call pipe-type penetration piece 5 is made of SUS316L, which is a low-temperature compatible steel material. As shown in FIGS. 2A and 2B, the penetrating piece 5 and the low-temperature pipe 4 are separated to reduce heat propagation. Therefore, as is clear from FIGS. 1, 2 (A) and (B), the shape of the through piece 5 is a call pipe type having a middle flange 7 on the pipe side, and the structure is designed to reduce heat propagation from this aspect as well. It is.

そして、低温配管４と貫通ピース５の接合には低温配管４に接合した通しフランジ９と配管側中フランジ７との間で接合する構造とし、さらに、通しフランジ９と配管側中フランジ７との間にＰＴＦＥ製断熱パッキンシート８を挟むことでさらに熱伝播を阻害するようにしたものである。 The low-temperature pipe 4 and the through-piece 5 are joined to each other by joining between the through flange 9 joined to the low-temperature pipe 4 and the pipe-side middle flange 7. Further, the through-flange 9 and the pipe-side middle flange 7 A heat insulating packing sheet 8 made of PTFE is sandwiched between them to further inhibit heat propagation.

すなわち、本実施例１に係る低温配管用特殊貫通ピース１においては、貫通ピース５の材質を熱伝搬が少ない低温適合鋼材のＳＵＳ３１６Ｌを使用し、かつ、両端フランジ６、７の接合領域を少なくし、さらに、フランジ７と通しフランジ９との間をＰＴＦＥ製断熱パッキンシート８を介する分離する接合構造としたので、低温配管４から貫通ピース５を通じ熱伝播が発生し、船殻部材（図示外）及びタイト壁面２が脆性破壊を起こすことを避けることができるようになったことに加え、貫通ピース部での突合せ継ぎ手自体が不要となり、貫通ピース内での非破壊試験を要することなく、また、低温配管４の貫通ピース５との接合フランジ７、９は、通しフランジ形状とすることで低温配管に継ぎ手を設ける必要がなくなり、このため、フランジ部のドリップトレイも不要となる。
そして、もっとも効果的なのは、従来、施工が不可能だった低温配管貫通が施工可能となったことである。 That is, in the special piercing piece 1 for low-temperature piping according to the first embodiment, the piercing piece 5 is made of SUS316L, which is a low-temperature compatible steel material with little heat transfer, and the joint area between the flanges 6 and 7 at both ends is reduced. Furthermore, since the flange 7 and the through flange 9 are separated through the PTFE heat insulating packing sheet 8, heat is propagated from the low temperature pipe 4 through the through piece 5, and the hull member (not shown) And in addition to being able to avoid the occurrence of brittle fracture in the tight wall surface 2, the butt joint itself at the penetrating piece is unnecessary, and a non-destructive test in the penetrating piece is not required. The joint flanges 7 and 9 of the low-temperature pipe 4 and the through-piece 5 are formed in a through-flange shape, so that there is no need to provide a joint in the low-temperature pipe, and therefore a drip tray for the flange portion is also unnecessary.
And the most effective thing is that it has become possible to construct low-temperature pipe penetration, which was impossible in the past.

本発明は、ＬＮＧ燃料船のＬＮＧ低温配管の船殻部材貫通部及びタイト壁貫通部に使用する低温配管用特殊貫通ピースに利用する。 INDUSTRIAL APPLICABILITY The present invention is applied to a special penetration piece for low-temperature piping used in hull member penetrations and tight wall penetrations of LNG low-temperature piping of an LNG-fueled ship.

１ 実施例１に係る低温配管用特殊貫通ピース
２ タイト壁面
３（３ａ－３ｂ） 貫通開孔
４ 低温配管
５ 呼び出し管型貫通ピース
６ 壁側フランジ
７ 配管側中フランジ
７ 配管側中フランジ
８ ＰＴＦＥ製断熱パッキンシート
９ 通しフランジ
１０１ 通継手（ピース）
１０１ａ 継手短管部
１０１ｂ 外径肥大部
１０２ ドーム壁（タンク壁）
1 Special through piece for low temperature piping according to Example 1 2 Tight wall surface 3 (3a-3b) Through hole 4 Low temperature pipe 5 Call pipe type through piece 6 Wall side flange 7 Pipe side middle flange 7 Pipe side middle flange 8 Made of PTFE Insulation packing sheet 9 Through flange 101 Through joint (piece)
101a Joint short pipe portion 101b Enlarged outer diameter portion 102 Dome wall (tank wall)

Claims (2)

ＬＮＧ燃料船のＬＮＧ低温配管の船殻部材貫通部及びタイト壁貫通部に使用する低温配管用特殊貫通ピースであって、
通しフランジにのみ接合される低温配管と、
貫通する壁面の貫通開孔に接合される壁側フランジと、壁側フランジと接合される呼び出し管型貫通ピースと、呼び出し管型貫通ピースと接合される配管側中フランジと、
呼び出し管型貫通ピースの配管側中フランジと通しフランジとの間にＰＴＦＥ製断熱パッキンシートと、を有することを特徴とする低温配管用特殊貫通ピース。 A special penetration piece for low-temperature piping used for hull member penetrations and tight wall penetrations of LNG low-temperature piping of an LNG fueled ship,
Cryogenic piping joined only to through flanges;
a wall-side flange joined to the through-hole of the penetrating wall surface, a call-pipe-type penetration piece joined to the wall-side flange, a pipe-side middle flange joined to the call-pipe-type penetration piece ,
A special penetration piece for low-temperature piping, characterized by having a PTFE heat insulating packing sheet between a pipe side middle flange and a through flange of a call pipe type penetration piece. 呼び出し管型貫通ピースが熱伝搬が少ない低温適合鋼材のＳＵＳ３１６Ｌ材質であることを特徴とする請求項１に記載の低温配管用特殊貫通ピース。
2. The special penetration piece for low-temperature piping according to claim 1, wherein the call pipe-type penetration piece is made of SUS316L, which is a low-temperature compatible steel material with little heat transfer.
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CN115727200B (en) * 2022-11-23 2024-05-10 沪东中华造船(集团)有限公司 Special low-temperature cabin penetrating piece device for film type LNG ship and application method

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WO2020008148A1 (en) 2018-07-06 2020-01-09 Gaztransport Et Technigaz Loading and/or unloading tower equipped with a device for spraying liquefied gas

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