201130579 六、發明說明： 【發明所屬之技彳，奸領域】 發明領域 本發明係有關於一種不鏽鋼製可撓性管。 本申請案係基於2009年11月5日已於日本提申之特願 2009-253978號而主張優先權，並在此援用其内容。 I：先前技術3 發明背景 空調機係使用冷媒之熱交換器，其配管一般則使用導 熱性優良之銅管。又，銅管不僅導熱性優良，加工性亦如 是’故無關導熱性之室内外機之連接配管亦使用銅管。在 此 般豕用空3周機僅需配管長4~5m程度即可充分進行連 接。然而，大樓及吊車等業務用空調機則因室内機與室外 機多設於分離處所’故連接配管超過_，視實際需要亦可 能需用IGOm左右。此時’現有之銅管因板厚在〇8麵以上， 故重量較大，而有運輸性較差之問題。又，空調機之冷氣 能力不同’將使連接配管之管徑增A，故進行配管之彎曲 加工需要彎曲機類之彎曲裝置。進而’由於不易延長配管， 而有配管彼此之連接作業增加等施工性極差之問題。吕 此夕卜’由於配管之重量增加，而易於配管垂吊處卿 生屏蔽管之破裂。因此，亦有配管外面容易結露而使配管 容易生鏽之問題，故現狀下時而使用結露防止片以避免^ 蔽管之破裂。 為解決上述問題’首先，關於輕量化，已檢討使用較 201130579 銅為輕之鋁合金之應用（泉 u照啫如專利文獻1)。然而，使用 鋁管时，將為進行連接而於 與成本較高之問題 於兩糙熔接銅管，故有加工耗時 力，个蹦硐囚具優良少Μ*·,, 之耐蝕性而使用於屋内外之各種 供水、熱水供應、氣體用配營 M 專。又，不鏽鋼因強度較大， 故板厚可較薄而構成可撓枓势 ^ 規11官。糟此，可如銅及鋁管般進 行-定程度之彎曲加工(參照諸如專利文獻2)，板厚較薄則 可較習知之銅管更為大幅輕量化。該料_製之可挽性 管多使用 SUS304、304L、316、U at κ 16 316L之沃斯田鐵系不鏽鋼。 與沃斯田鐵系不_相較，更為廉價而加工硬化較少之肥 粒鐵系不鏽鋼製之可撓性管則已檢討對汽車排氣系統之應 用（參照諸如專利文獻3)。 因此，本發明人等進行了鑽研檢討，而檢討了可挽性 管之彎曲加讀及擴口加讀，以使用肥粒鐵系不_對 空調機進行連接現了其㈣錢形雜之條件（參照 專利文獻4)。然而，實際對空調機連接上述可撓性管而加 以評價後’則衫當冷媒㈣義料，彳請可能產生由 可撓性管之波形形狀所導致之流體噪音。 上述流體噪音可推測等同於在瓦斯加熱器及鋼爐等教 交換器中’由導管、導熱管群及機體内之流動等3種導致產 生之氣柱共鳴縣。已知在流動於導管内之氣體流速之上 汁同時，導熱官群所放出之卡門渦之頻率將增大，並與導 管之氣柱共鳴解-致而產生嗓音（非專利文獻丨）。可推測 在可撓性管中，伴隨氣體之流動，波形形狀所導致產生之 201130579 卡門渦之頻率及其與可撓性管之共鳴頻率一致，而產生流 體噪音。該等可撓性管之流體噪音之對策，則已檢討了諸 如設有可使管内部流動之空氣不流入多數溝槽之壁面之可 撓性管（參照諸如專利文獻5、6)。然而，專利文獻5、6所揭 露之方法則有工業上之安定製造之成本甚高之問題。 【先行技術文獻】 【專利文獻】 【專利文獻1】 【專利文獻2】 【專利文獻3】 【專利文獻4】 【專利文獻5】 【專利文獻6】 特開2003-275832號公報 特開2006-177529號公報 特開平11-159616號公報 特開2009-185351號公報 特開2008-220922號公報 特開2006-64126號公報 【非專利文獻】 【非專利文獻1】「實例學習流體相關振動」，日本機械 學會編，技法堂出版，2003年，第2章，P.90 【發明内容】 發明概要 發明欲解決之課題 本發明係有鑑於上述問題而設計者，目的在提供一種 較為經濟，可改善施工時之彎曲加工性，並避免產生推測 乃冷媒氣體之流動所導致之流體噪音之不鏽鋼製可撓性 管。 用以欲解決課題之手段 201130579 本發明人等為解決上述問題而反覆鑽研檢討之結果， 獲知為確保施工時之彎曲加工性，宜增大可撓性管之波形 形狀（參照專利文獻4)，而，為抑制流體噪音，則宜儘可能 接近直管形狀。其次，為兼顧上述相反之特性，則使用各 種不鏽鋼，就可兼顧可撓性管之彎曲加工性與流體噪音之 抑制之形狀進行了檢討。其結果，發現了管料外徑與可撓 性管之山間間距與谷部深度之關係甚為重要，而完成本發 明。 本發明之一態樣之不鏽鋼製可撓性管由原料板厚 0.2〜0.4mm以下之金屬不鏽鋼所構成，具有形成波形形狀之 可撓部，管料外徑為d(mm)時，前述波形形狀符合管料外徑 d/谷部深度Dd: 15〜23，且管料外徑d/山部至山部之間距P : 2.5〜5.5之條件。 本發明一態樣之不鏽鋼製可撓性管亦可於其兩端或單 端設有管料部。 本發明一態樣之不鏽鋼製可撓性管亦可將前述管料部 與前述波形形狀所構成之可撓部交互分別配置於複數處 所。 本發明一態樣之不鏽鋼製可撓性管亦可將前述可撓性 管之整體構成繞轉成螺旋狀之線捲形狀。 本發明一態樣之不鏽鋼製可撓性管亦可於其兩端或單 端設有管料部，進而，前述管料部之雙方或單方亦可設有 擴口加工部。 發明效果 201130579 依據本發明一態樣之不鏽鋼製可撓性管，藉將原料板 厚與波形形狀規定如上，則可使諸如空調機，尤其業務用 之空調機室内外機之連接配管及空調機機器用之配管輕量 化。又，可進行施工時之彎曲加工，進而，可抑制冷媒氣 體之流動所導致之流體噪音。 可撓性管之兩端或單端均設有管料部時，可於施工現 場進行連接所需之擴口加工，並連接室内外機及配管彼 此。又，管料部與波形形狀部（可撓部）交互分別配置於複數 處所時，可於任意位置中斷再連接。 可撓性管之整體呈繞轉成螺旋狀之線捲形狀時，則可 運輸任意長度之可撓性管，並提昇施工性。 可撓性管之兩端或單端設有管料部，進而其管料部之 雙方或單方設有擴口加工部時，則無須於施工現場進行擴 口加工，便可立即進行連接。 圖式簡單說明 第1圖係顯示本發明之實施例之不鏽鋼製可撓性管之 模式截面圖。 第2圖係說明本發明之實施例之不鏽鋼製可撓性管之 模式圖，且為顯示捲成線捲狀之狀態之立體圖。 第3圖係說明本發明之實施例之不鏽鋼製可撓性管之 模式圖，且為顯示可撓性管之波形形狀與施工時之彎曲加 工性及流體噪音之關係之圖表。 I[實方包方式J 用以實施發明之形態201130579 VI. Description of the Invention: [Technology of the Invention, Field of the Invention] Field of the Invention The present invention relates to a stainless steel flexible tube. The present application claims priority based on Japanese Patent Application No. 2009-253978, filed on Nov. 5, 2009, the entire disclosure of which is incorporated herein. I. Prior Art 3 Background of the Invention The air conditioner is a heat exchanger using a refrigerant, and the piping is generally a copper tube excellent in heat conductivity. Further, the copper pipe is not only excellent in thermal conductivity, but also has good workability. Therefore, a copper pipe is also used for the connection pipe of the indoor and outdoor unit which has no thermal conductivity. In this way, the empty three-week machine can be fully connected by only 4 to 5 m. However, air conditioners for business buildings such as buildings and cranes have more than one indoor unit and one outdoor unit. Therefore, the connection piping exceeds _, and IGOm can be used depending on actual needs. At this time, the existing copper tube has a weight of more than 8 faces, so the weight is large, and there is a problem of poor transportability. In addition, the air-conditioning capacity of the air conditioner differs. The pipe diameter of the connecting pipe is increased by A. Therefore, the bending process of the pipe is required for the bending process of the pipe. Further, there is a problem that the construction is extremely poor, such as the difficulty in extending the piping, and the increase in the connection work between the pipes. Lu 此 卜 ’ As the weight of the piping increases, it is easy to rupture the shielding pipe at the hanging pipe. Therefore, there is a problem in that the outside of the piping is easily dew condensation and the piping is liable to rust. Therefore, the condensation preventing sheet is sometimes used to prevent the crack of the tube. In order to solve the above problems, first of all, regarding the weight reduction, the application of using aluminum alloy which is lighter than 201130579 copper has been reviewed (Quan Yu et al., Patent Document 1). However, when an aluminum tube is used, it will be used for the connection and the cost is high, and the copper tube is welded in two rough directions, so that it is time-consuming to process, and the rods are excellent in corrosion resistance. Various water supply, hot water supply and gas distribution inside and outside the house. Moreover, due to the high strength of the stainless steel, the thickness of the steel plate can be made thin and constitute a flexible force. On the other hand, it is possible to perform bending processing in a predetermined degree like copper and aluminum tubes (see, for example, Patent Document 2), and the thinner thickness can be made more compact and lighter than conventional copper tubes. This material is made of a SUS304, 304L, 316, U at κ 16 316L Wostian iron-based stainless steel. Compared with the Worth Iron, the flexible tube made of iron, stainless steel, which is cheaper and harder to work hard, has been reviewed for application to automotive exhaust systems (see, for example, Patent Document 3). Therefore, the inventors of the present invention conducted a review and reviewed the bending, reading, and flaring of the pullable tube to use the ferrite-grained iron system to connect the air conditioner to the air conditioner. (Refer to Patent Document 4). However, in actuality, when the air conditioner is connected to the above-mentioned flexible tube and evaluated, the shirt is used as a refrigerant (four), and fluid noise caused by the waveform shape of the flexible tube may be generated. The above-mentioned fluid noise is presumably equivalent to a gas column resonance county which is produced by three types of pipes, a heat transfer pipe group, and a body in a teaching exchanger such as a gas heater and a steel furnace. It is known that at the same time as the flow of the gas flowing through the inside of the conduit, the frequency of the Karman vortex emitted by the heat-conducting group increases, and the sound column of the guide tube resonates to generate a squeak (Non-Patent Document 丨). It is presumed that in the flexible tube, the frequency of the 201130579 Karman vortex caused by the waveform shape and the resonance frequency with the flexible tube accompanying the flow of the gas generate fluid noise. In the countermeasure against the fluid noise of the flexible tubes, for example, a flexible tube in which the air flowing inside the tube does not flow into the wall surface of the plurality of grooves is examined (see, for example, Patent Documents 5 and 6). However, the methods disclosed in Patent Documents 5 and 6 have a problem that the cost of industrially stable manufacturing is high. [Patent Document 1] [Patent Document 1] [Patent Document 2] [Patent Document 3] [Patent Document 4] [Patent Document 5] [Patent Document 6] JP-A-2003-275832 [Non-patent Document 1] "Non-Patent Document 1" "Example Learning Fluid Related Vibration", JP-A-2008-210922 Japanese Society of Mechanical Engineering, Technical Law Publishing, 2003, Chapter 2, P.90 [Summary of the Invention] SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and aims to provide a more economical and improved The bending processability during construction and the avoidance of a stainless steel flexible tube which is supposed to be a fluid noise caused by the flow of the refrigerant gas. In order to solve the above-mentioned problems, the inventors of the present invention have repeatedly studied the results of the review, and have found that it is necessary to increase the waveform shape of the flexible tube in order to ensure bending workability during construction (see Patent Document 4). However, in order to suppress fluid noise, it is preferable to be as close as possible to the shape of the straight tube. Next, in order to achieve the above-mentioned opposite characteristics, the use of various types of stainless steel can be considered in consideration of the shape of the flexible tube and the suppression of fluid noise. As a result, it has been found that the relationship between the outer diameter of the tube and the distance between the mountains of the flexible tube and the depth of the valley is important, and the present invention has been completed. The stainless steel flexible tube of one aspect of the present invention is composed of a metal stainless steel having a thickness of 0.2 to 0.4 mm or less, and has a flexible portion forming a wave shape, and the waveform is the outer diameter of the tube (d). The shape conforms to the outer diameter d/valley depth Dd of the pipe material: 15 to 23, and the outer diameter d of the pipe material/the distance between the mountain portion and the mountain portion is P: 2.5 to 5.5. The stainless steel flexible tube of one aspect of the present invention may also be provided with a tube portion at both ends or at one end thereof. The stainless steel flexible tube according to one aspect of the present invention may be disposed in a plurality of places in which the tube portion and the flexible portion formed by the waveform shape are alternately disposed. The stainless steel flexible tube of one aspect of the present invention may also be formed by rotating the entire flexible tube into a spiral shape. The stainless steel flexible tube according to one aspect of the present invention may be provided with a tube portion at both ends or at one end thereof, and further, both of the tube portions or a single portion may be provided with a flared portion. According to the present invention, the stainless steel flexible tube can be connected to the indoor and outdoor units of the air conditioner, such as an air conditioner, and the air conditioner. The piping for the machine is lightweight. Further, it is possible to perform bending processing during construction, and further, it is possible to suppress fluid noise caused by the flow of the refrigerant gas. When the pipe ends are provided at both ends or single ends of the flexible pipe, the flaring process required for connection at the construction site can be performed, and the indoor and outdoor machines and piping can be connected to each other. Further, when the tube portion and the waveform portion (flexible portion) are alternately arranged in a plurality of places, the reconnection can be interrupted at any position. When the entire flexible tube is wound into a spiral shape, the flexible tube of any length can be transported and the workability can be improved. When the flexible tube is provided with a tube portion at both ends or a single end, and even if both of the tube portions or the flaring portion are provided with a flared portion, the connection can be immediately performed without flaring at the construction site. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic cross-sectional view showing a stainless steel flexible tube according to an embodiment of the present invention. Fig. 2 is a schematic view showing a stainless steel flexible tube according to an embodiment of the present invention, and is a perspective view showing a state in which it is wound into a coil shape. Fig. 3 is a schematic view showing a stainless steel flexible tube according to an embodiment of the present invention, and is a graph showing the relationship between the waveform shape of the flexible tube and the bending workability and fluid noise during construction. I[The real package method J is used to implement the invention
S 7 201130579 以下’就本發明一態樣之不鏽鋼製可撓性管之實施 例’適當參照第1〜3圖加以說明。另，本實施例係詳細說明 本發明一態樣之不鑛鋼製可撓性管之旨趣以更深入促進理 解者’故無特別指明時，則非用以限定本發明者。 第1圖係本發明之實施例之不鏽鋼製可撓性管丨〇之截 面圖。 本發明之一態樣之不鏽鋼製可撓性管（以下，時而簡稱 為可撓性管）1〇係如第1圖所示，以板厚0.2〜0.4mm以下之不 鏽鋼為原料而形成。管料外徑為d(mm)時，可撓性管10所形 成之波形形狀大略構成符合管料外徑d/谷部深度Dd : 15〜23，且，管料外徑d/山部至山部之間距p : 2.5〜5.5之條 件。 如第1圖所示，可撓性管10包含設於端部之擴口加工部 14、管料部12、呈波形形狀之可撓部2〇。可撓部20形成有 沿行可撓性管1〇之周面之圓周方向之獨立山部22與谷部24 交互配置而成之波形形狀。又，喇叭螺帽30則在可旋轉及 滑動自如之狀態下為可撓性管10所插入。 制0八螺帽30可依預定之扭矩固裝，而使用於連接配管 彼此，一般係於擴口加工前插入可撓性管。 可挽部20之波形形狀並無特別之限制’諸如山部之頂 部、谷部之底部之形狀一般均呈曲面，但亦可為銳角之凸 部。 就可撓部20之波形形狀參照第1圖詳細說明如下。 本發明之一態樣中’可撓部20之波形形狀與管料外徑d 8 201130579 之大小之關係甚為重要。本發明之一態樣中，山部外徑 dm(mm)與谷部外徑dv(mm)之差之1/2定為谷部深度 Dd(mm)，山部頂部至隣接山部頂部之長度則定為波形形狀 之間距P(mm)。管料外徑d(mm)與谷部深度Dd(mm)之比 (d/Dd)宜在15〜23之範圍内，且管料外徑d(mm)與波形形狀 之間距P(mm)之比（d/P)宜在2·5~5.5之範圍内。而，d/Dd為 17〜21.5 ’且d/P為2.5〜4則更佳。 管料外徑d/谷部深度Dd小於15時，管料外徑之相對之 合部深度將增大’而使彎曲加工時之變形分散至若干波部 而不易挫曲，並提昇施工性。然而，波形形狀所導致之卡 門滿之頻率與可撓性管之氣柱共鳴頻率將一致而容易產生 流體噪音。又，管料外徑d/谷部深度]^^大於23時，相對地 谷部深度將減小’而可抑制流體噪音◦然而，施工時之彎 曲加工性將劣化。 又’管料外徑d/間距p小於25時，相對地谷部深度較 小，而可抑制流體噪音。然而，施工時之彎曲加工性將劣 化。又，官料外徑d/間距p大於5 5時，相對地谷部深度較大， 而可提昇施工性。然而’將易產生流體噪音。 關於上述波形形狀之規定，將於後述之實施例中加以 檢讨。基於後述之表2所示之實施例之資料，就施工時之彎 曲加X性及流體噪音之產生加以整理之結果則顯示於第3 圖。 I發明之樣中’所謂「管料」—般係指使用鋼帶 或鋼板而藉電卩辑接或電弧熔接製成之管體，本發明之一 201130579 悲樣中’貝包含冷拉管。盆 有可撓部之處所。“戶斤明「管料部」則指未設 管料部12之處所並無特別之限制亦可配置於可挽部 娃之兩側或單側’或交互配置魏之管㈣12與複數之可 撓部20。 管料外經d並無_之規定。然而舉财之，家用空 ::連接配管中’冷媒液用配管之管料外徑為6 35_，而 =體用配管之管料外徑則為9.52咖。一般係使用上述 種s料外徑之配管。 使用管料朴9 52 叙冷驗用配管係 管則你 之配管及4分管。又，冷媒氣體用配 】使用4分管及管料外徑15.88麵、19()5麵之配管等。 配管此外1於空調機時亦時而使料料外徑大於20mm之 因此’本發明中，宜在6〜3()咖之範_適當決定管料 外徑d。 本發明之一態樣中，作為可撓性管10之原料之不錄鋼 之板=為G.2〜0.4mm。不_之板厚小於G 2mm時，作為可 s之強度將降低。進而，擴口加工時將無法加工至預 疋之擴f率’而將於擴〇加工先端部(擴口加工部)發生敏摺 (破裂）。進而’考$市場上之接受性，而將不鏽鋼之板厚下 限定為0.2mm。又，不鏽鋼之板厚大於〇 4mm時，施工現場 之彎曲加工性將明顯降低。 故而，作為原料之不鏽鋼之板厚設為〇 2〜〇 4mm。 本發明之一態樣所使用之不鏽鋼之組成並無特別之限 10 201130579 制。舉例言之，ns已有規定者，若為沃斯田鐵系不鑛鋼， 則可使用8刪)4、3隱、316'31亿等。又，若為肥粒鐵 系不鏽鋼，則可使用 SUS430、SUS430J1L ' SUS43〇LX、 SUS436L、SUS4迎L、SUS444等。肥粒鐵系不錄鋼未如 沃斯田鐵系不鑛鋼般含有多量之Ni，故較為廉價。又，肥 粒鐵系不鏽鋼與沃斯田鐵系不鏽鋼相較，其加工硬化較 少，故施工性優良。 本發明之-態樣中，可撓性管之製造方法並無特別之 限制。舉例言之’可例舉使用板厚0,2〜〇4_之不鏽鋼板， 藉既有之方法製成管料作為熔接管或冷拉管，接著對前述 管料壓附刀狀之模具而形成波形形狀之方法。又，可例舉 使用凹凸軋輥而於不鏽鋼板上形成波形，然後捲起業經波 形成形之鋼板同時進行熔接而製成可撓性管之方法等。 依據本發明之一態樣，可撓部20之波形形狀符合管料 外把d/谷部深度Dd : 15〜23，歸料外徑d/山部至山部之間 距P· 2.5〜5_5之條件時’施工時之彎曲加工性與冷媒氣體之 ML動所導致之流體嗓音之抑制，雙方均可獲實現。 又，本發明之一態樣之不鏽鋼製可撓性管於兩端或單 端設有管料部，而可輕易進行擴口加工。因此，可於施工 現場進行連制需之擴口加卫，而連接室⑽機及配管彼 此。尤其，採用交互配置有複數之可撓部與複數之管料部 :長形可撓性㈣’可於施工現場對應所需之長度而於任 思位置上裁切管料部’而製得於端部設有管料部之可繞性 管0 11 201130579 第1圖所示之可撓性管10之一例係可撓部20乃由分別 獨立之山部22與谷部24按一定之間距排列而成者（單一間 距型）’但並不受限於此。舉例言之，亦可於周面部上呈螺 旋狀形成山部與谷部。又，實際上使用可撓性管10作為配 管時，通常之家用空調機需要4〜5m程度長度之連接配管。 而，大樓及吊車等之配管則長達1 〇m以上，視情形而長達 100m左右者亦不少。上述狀況下，一旦考量運輸之便利性 等’則如第2圖所示之可撓性管40之一例般，整體宜為捲成 線捲狀之線捲形狀(線捲内管）。藉上述構造，可挽性管之長 度愈長’愈可較習知之銅管更為輕量化。因此，可運輸任 意長度之可撓性管，而改善施工時之運輸性及包括處理在 内之施工性。另，第2圖所示之一例中，可撓部2〇與管料部 12係於同一位置上進行捲束。然而，亦可改變可撓部與管 料部之長度’或改變捲束線捲直徑，而使可撓部與管料部 之位置錯開。 第1圖所示之可撓性管1〇之一例中，於端部設有擴口加 工部14。然而，亦可不設該擴口加工部，而將管料部q配 置於可撓性管10之端部，或將可撓部2〇配置於端部上。又 擴口加工部14、管料部12或可撓部2〇亦可設於可撓性警 之兩端，或僅設於一端。 於可撓性管10之端部之雙方或單方設有擴口加工邹U 時，可不於施工現場進行擴口加工而立即進行連接。 如以上之說明，依據本發明之一態樣之不鏽鋼製可嬈 性管，如上述般規定原料板厚與波形形狀，即可使諸 如空 12 201130579 調機尤其«紅㈣機室㈣機之連接崎及空調機機 器用之配管輕量化。又，並可實現施工時之彎曲加工，進 而抑制冷媒氣體之流動所導致之流體噪音。因此，產業上 之利用效果甚大。 【實施例】 以下，例舉本發明之一態樣之不鑛鋼製可撓性管之實 施例，而更具體說明本發明之一態樣。然而，本發明之一 悲樣不受限於以下之貫施例，亦可在符合前述旨趣之範圍 内適當變更而進行實施，其等均包含在本發明之技術範圍 内。 [可撓性管之製造] 首先，使用包含表1所示之成分、板厚則如表2所示之 鋼板’製成了 9·52ηιηιφ、15.88ιηηιφ或 19·05ιηιηφ之TIG熔接 管。另，鋼種A係SUS430LX，鋼種B係SUS304。 其次，使用上述TIG熔接管，依循表2之記載，交互配 置複數長度170mm之可撓部與長度30mm之管料部，而製成 全長4m之長形可撓性管。接著，為方便運輸而將可撓性管 捲成線捲狀，而製成線捲直徑約為lm之可撓性管線捲内管。 就上述可撓性管線捲内管，則藉裁切波形形狀部（可撓 部）所夾設之管料部，而將兩端設有管料部而中央部設有波 形形狀之可撓部之可撓性管裁成約lm之長度。接著，使用 裁出之可撓性管，就彎曲加工性與流體噪音有無產生，按 後述之步驟加以評價。 [評價測試]S 7 201130579 The following description of the embodiment of the stainless steel flexible tube according to the present invention will be described with reference to Figs. 1 to 3 as appropriate. Further, the present embodiment is intended to explain in detail that the non-mineral steel flexible tube of one aspect of the present invention is intended to further enhance the understanding of the present invention, and is not intended to limit the invention. Fig. 1 is a cross-sectional view showing a stainless steel flexible pipe according to an embodiment of the present invention. A stainless steel flexible tube (hereinafter, simply referred to as a flexible tube) according to one aspect of the present invention is formed of a stainless steel having a thickness of 0.2 to 0.4 mm or less as shown in Fig. 1 . When the outer diameter of the tube is d (mm), the shape of the waveform formed by the flexible tube 10 is roughly configured to conform to the outer diameter d/valley depth Dd of the tube: 15 to 23, and the outer diameter of the tube d/mountain to The distance between the mountains is p: 2.5 to 5.5. As shown in Fig. 1, the flexible tube 10 includes a flared portion 14 provided at the end portion, a tube portion 12, and a flexible portion 2 having a wave shape. The flexible portion 20 is formed in a wave shape in which the independent mountain portion 22 and the valley portion 24 in the circumferential direction of the circumferential surface of the row of flexible tubes 1 are alternately arranged. Further, the horn nut 30 is inserted into the flexible tube 10 in a rotatable and slidable state. The yoke 8 can be fixed to a predetermined torque and used to connect the pipes to each other, generally before the flaring process. The shape of the waveform of the handle portion 20 is not particularly limited. For example, the shape of the top portion of the mountain portion and the bottom portion of the valley portion is generally curved, but may be a convex portion of an acute angle. The waveform shape of the flexible portion 20 will be described in detail below with reference to Fig. 1. In one aspect of the invention, the relationship between the shape of the flexible portion 20 and the size of the outer diameter of the tube d 8 201130579 is important. In one aspect of the invention, the difference between the outer diameter dm (mm) of the mountain portion and the outer diameter dv (mm) of the valley portion is determined as the depth Dd (mm) of the valley portion, and the top of the mountain portion is adjacent to the top of the mountain portion. The length is defined as the distance P (mm) between the waveform shapes. The ratio of the outer diameter d (mm) of the tube to the depth Dd (mm) of the valley (d/Dd) is preferably in the range of 15 to 23, and the distance between the outer diameter d (mm) of the tube and the waveform shape is P (mm). The ratio (d/P) should be in the range of 2. 5 to 5.5. Further, it is more preferable that d/Dd is 17 to 21.5 ' and d/P is 2.5 to 4. When the pipe outer diameter d/valley depth Dd is less than 15, the relative joint depth of the outer diameter of the pipe material will increase', and the deformation at the time of bending processing is dispersed to a plurality of wave portions, which is not easily bucked, and the workability is improved. However, the frequency of the card door caused by the waveform shape will be consistent with the air column resonance frequency of the flexible tube, which is liable to generate fluid noise. Further, when the pipe outer diameter d/valley depth] is larger than 23, the depth of the valley portion is reduced, and the fluid noise can be suppressed. However, the bending workability during construction is deteriorated. Further, when the outer diameter d/pitch p of the pipe material is less than 25, the depth of the valley portion is relatively small, and fluid noise can be suppressed. However, the bending workability during construction will be deteriorated. Further, when the outer diameter d/pitch p of the official material is larger than 5 5 , the depth of the valley portion is relatively large, and the workability can be improved. However, it will be prone to fluid noise. The specification of the waveform shape described above will be reviewed in the examples described later. Based on the data of the examples shown in Table 2, which will be described later, the results of the correction of the bending and the generation of the fluid during the construction are shown in Fig. 3. In the case of the invention, the term "pipe material" generally refers to a pipe body which is formed by electric wire splicing or arc welding using a steel strip or a steel plate. One of the inventions of the present invention 201130579 contains a cold drawn tube. The basin has a flexible part. "Doujin Ming "pipe material department" means that there is no special restriction on the pipe material part 12, and it can be placed on either side of the removable part or on one side' or the interactive arrangement of the Wei (4) 12 and the plural. The deflection portion 20. There is no _ regulation for the external material of the pipe. However, in the case of household use, the outer diameter of the pipe for the refrigerant liquid is 6 35_, and the outer diameter of the pipe for the body pipe is 9.52 coffee. Generally, piping of the outer diameter of the above-mentioned materials is used. Use the pipe material 9 52 squirrel test piping system and your pipe and 4 pipe. In addition, for the refrigerant gas, a pipe with a diameter of 15.88 and a pipe with a diameter of 15.88 and a surface of 19 () are used. In addition, in the case of the air conditioner, the outer diameter of the material is greater than 20 mm. Therefore, in the present invention, it is preferable to appropriately determine the outer diameter d of the tube in the range of 6 to 3 (). In one aspect of the present invention, the steel sheet which is the raw material of the flexible tube 10 is G.2 to 0.4 mm. When the thickness of the plate is less than G 2 mm, the strength as the s will decrease. Further, at the time of the flaring, the expansion rate of the pre-twisting portion cannot be processed, and the flaring (the flaring processing portion) of the boring processing is visibly broken (broken). Furthermore, it is considered to be acceptable in the market, and the thickness of the stainless steel plate is limited to 0.2 mm. Also, when the thickness of the stainless steel plate is larger than 〇 4 mm, the bending workability at the construction site is remarkably lowered. Therefore, the thickness of the stainless steel as a raw material is set to 〇 2 to 〇 4 mm. The composition of the stainless steel used in one aspect of the present invention is not limited to 10 201130579. For example, if ns has been stipulated, if it is a Worthite iron non-mineral steel, it can be used 8 to delete 4, 3 hidden, 316'31 billion and so on. In addition, SUS430, SUS430J1L 'SUS43〇LX, SUS436L, SUS4, L, SUS444, etc. can be used as the ferrite-type stainless steel. The ferrite-grained iron is not as good as the steel. The Vostian iron-based non-mineral steel contains a large amount of Ni, so it is cheaper. Further, the ferrite-based iron-based stainless steel has less work hardening than the Worthfield iron-based stainless steel, and therefore has excellent workability. In the aspect of the invention, the method of producing the flexible tube is not particularly limited. For example, a stainless steel plate having a thickness of 0, 2 to 〇 4_ can be exemplified, and a pipe material is used as a fusion pipe or a cold drawing pipe by an existing method, and then a knife-shaped mold is pressed onto the pipe material. A method of forming a waveform shape. Further, a method of forming a flexible tube by forming a corrugated shape on a stainless steel plate using a concave-convex roll, and then rolling up a steel plate which is formed by a wave shape can be exemplified. According to an aspect of the present invention, the waveform shape of the flexible portion 20 conforms to the d/valley depth Dd of the pipe material: 15 to 23, and the outer diameter d/the distance between the mountain portion and the mountain portion is P·2.5 to 5_5. In both cases, both the bending workability during construction and the suppression of fluid noise caused by the ML movement of the refrigerant gas can be achieved. Further, the stainless steel flexible tube of one aspect of the present invention is provided with a tube portion at both ends or at one end, and can be easily flared. Therefore, it is possible to carry out the expansion and reinforcement required for the connection at the construction site, and the connection room (10) machine and piping are for each other. In particular, a plurality of flexible portions and a plurality of tube portions are alternately arranged: an elongated flexible (four) 'can be cut at a position on the construction site at a position required at the construction site' The flexible tube 10 is provided with a tube portion at the end. 0 11 201130579 One example of the flexible tube 10 shown in Fig. 1 is a flexible portion 20 which is arranged at a certain distance between the independent mountain portion 22 and the valley portion 24 The creator (single pitch type)' is not limited to this. For example, the mountain and the valley may be formed spirally on the peripheral surface. Further, when the flexible tube 10 is actually used as the piping, the household air conditioner usually requires a connecting pipe having a length of 4 to 5 m. However, the piping for buildings and cranes is more than 1 〇m, and as many as 100m depending on the situation. In the above-mentioned situation, as for the convenience of transportation, etc., as in the case of the flexible tube 40 shown in Fig. 2, the entire shape of the flexible tube 40 is preferably wound into a coil shape (a coiled inner tube). With the above configuration, the longer the length of the manageable tube is, the more lightweight the conventional copper tube is. Therefore, flexible pipes of any length can be transported to improve the transportability during construction and the workability including handling. Further, in an example shown in Fig. 2, the flexible portion 2 is wound at the same position as the tube portion 12. However, it is also possible to change the length of the flexible portion and the portion of the tube or to change the diameter of the wound wire to shift the position of the flexible portion from the portion of the tube. In one example of the flexible tube 1 shown in Fig. 1, a flared processing portion 14 is provided at the end. However, the pipe portion q may be disposed at the end of the flexible pipe 10 or the flexible portion 2〇 may be disposed on the end portion without providing the flared portion. Further, the flared portion 14, the tube portion 12 or the flexible portion 2〇 may be provided at both ends of the flexible alarm or only at one end. When both sides of the flexible tube 10 or one side of the flexible tube 10 is provided with a flaring process, the connection can be immediately performed without flaring the construction site. As described above, according to one aspect of the present invention, the stainless steel duct can be connected to the thickness of the raw material and the waveform shape as described above, so that the connection of the machine, such as the space 12 201130579, especially the "red (four) machine room (4) machine can be connected. The piping used in the air conditioners and air conditioners is lightweight. Further, it is possible to realize bending processing during construction, thereby suppressing fluid noise caused by the flow of the refrigerant gas. Therefore, the industrial use is very effective. [Embodiment] Hereinafter, an embodiment of the present invention will be described in more detail by exemplifying an embodiment of a non-mineral steel flexible tube according to an aspect of the present invention. However, the sorrow of the present invention is not limited to the following embodiments, and may be appropriately modified within the scope of the above-described purpose, and the like is included in the technical scope of the present invention. [Manufacturing of Flexible Tube] First, a TIG fusion tube of 9·52 ηιηιφ, 15.88 ηηηιφ, or 19·05ιηιηφ was produced using the steel sheet shown in Table 2 and having the sheet thickness shown in Table 1. In addition, the steel type A is SUS430LX, and the steel type B is SUS304. Next, using the above-mentioned TIG fusion pipe, according to the description of Table 2, a plurality of flexible portions having a length of 170 mm and a pipe portion having a length of 30 mm were alternately arranged to form an elongated flexible tube having a total length of 4 m. Next, the flexible tube is wound into a coil shape for convenient transportation, and a flexible tube inner tube having a coil diameter of about lm is formed. In the coiled inner tube of the flexible line, the tube portion interposed between the corrugated shape portion (flexible portion) is cut, and the tube portion is provided at both ends, and the flexible portion of the wave shape is provided at the center portion. The flexible tube is cut to a length of about lm. Next, using the cut flexible tube, the bending workability and the fluid noise were generated, and the evaluation was carried out in accordance with the procedure described later. [evaluation test]
S 13 201130579 就上述步驟所製得之可撓性管，按以下說明之步驟進 行了評價。 另，對實際之空調機連接製成之全部可撓性管，而評 價流體噪音有無產生，甚為困難。故，以下說明之流體噪 音有無產生之評價係作為簡易評價而實施者。其次，就若 干之可撓性管線捲内管以相同之條件再製1卷，並予以供作 空調機測試之用。藉此，而確認了實際機器上之異響有無 產生。 [彎曲加工性] (測試方法） 就彎曲加工性，已假設實際之空調機施工，而對可撓 性管使用彎曲半徑為300mm之彎曲機進行90度彎曲而加以 評價。 (評價基準） 依上述測試方法，彎曲加工時未發生挫曲及扁平者為 合格，已發生挫曲及扁平者則不合格。結果顯示於表2。 <流體噪音有無產生> (測試方法） 對實際之空調機連接全部可撓性管而加以評價甚為困 難。故，對可撓性管之一端連接了橡皮管。其次，自氣體 鋼瓶經橡皮管朝可撓性管按1氣壓下5L/min之流量流入空 氣，而加以評價。 (評價基準） 朝可撓性管之内部按1氣壓下5L/min之流量流入空 14 201130579 氣，同時在可撓性管之距離未連接有橡皮管之他端50cm之 位置上，使用噪音計測量了流體噪音。一般而言，未產生 流體噪音時之噪音音量在50dB以下，若為50dB以上，則已 產生流體異響。又，若在60dB以上，則形成刺耳之笛音般 之流體異響。因此，測量值在50dB以下者為合格，測量值 在5OdB以上者為不合格。 <空調機連接測試> (測試方法） 就上述流體噪音測試中合格之可撓性管與不合格之可 撓性管之一部分，實際上予以連接至空調機而加以評價。 (評價基準） 對空調機連接了可撓性管線捲内管。其次，於空調機 室内外機之距離配管lm之位置固定噪音計而測定有無產生 異響。與上述之流體噪音有無產生之測試方法相同，測量 值在50dB以下者為合格，測量值為50dB以上者為不合格。 表1已顯示可撓性管之原料鋼種（成分組成），表2則顯示 評價結果之一覧。S 13 201130579 The flexible tube made in the above procedure was evaluated according to the procedure described below. In addition, it is very difficult to evaluate whether or not the fluid noise is generated by connecting all the flexible tubes made by the actual air conditioner. Therefore, the evaluation of whether or not the fluid noise is described below is performed as a simple evaluation. Secondly, one roll of the flexible flexible coil inner tube is remanufactured under the same conditions and is used for air conditioner testing. In this way, it is confirmed whether or not the abnormal noise on the actual machine is generated. [Bending workability] (Test method) In the case of the bending workability, the actual air conditioner construction was assumed, and the flexible pipe was bent at 90 degrees using a bending machine having a bending radius of 300 mm. (Evaluation Criteria) According to the above test method, no buckling and flattening occurred during bending, and those who have suffered buckling and flattening are unqualified. The results are shown in Table 2. <The presence or absence of fluid noise> (Test method) It is difficult to evaluate the actual connection of all the flexible tubes to the air conditioner. Therefore, a rubber hose is connected to one end of the flexible tube. Next, it was evaluated from a gas cylinder through a rubber tube to a flexible tube at a flow rate of 5 L/min at a pressure of 1 L/min. (Evaluation Criteria) Into the inside of the flexible pipe, flow into the air 14 201130579 at a flow rate of 5 L/min at 1 air pressure, and use a noise meter at a position where the flexible pipe is not connected to the other end of the rubber tube at a distance of 50 cm. The fluid noise was measured. In general, the noise level when the fluid noise is not generated is 50 dB or less, and if it is 50 dB or more, the abnormal noise of the fluid is generated. Further, if it is 60 dB or more, a strange noise such as a rattle sound is formed. Therefore, if the measured value is 50 dB or less, it is acceptable, and if the measured value is 5 dBdB or more, it is unacceptable. <Air-Conditioner Connection Test> (Test Method) One of the flexible tube and the defective flexible tube which passed the above-mentioned fluid noise test was actually connected to the air conditioner and evaluated. (Evaluation criteria) A flexible line inner tube was connected to the air conditioner. Next, a noise meter is fixed to the position of the pipe lm at the indoor and outdoor unit of the air conditioner to determine whether or not an abnormal noise is generated. It is the same as the test method for the occurrence of the above-mentioned fluid noise. If the measured value is 50 dB or less, it is acceptable. If the measured value is 50 dB or more, it is unacceptable. Table 1 shows the raw material steel (component composition) of the flexible pipe, and Table 2 shows one of the evaluation results.
S 【表1】 鋼種 鋼成分組成（質量百分比） C Si Μη Ρ S Cr Ni Cu Mo Ti N A 0.003 0.06 0.12 0.014 0.001 16.5 - - - 0.16 0.009 B 0.06 0.5 0.87 0.028 0.004 18.3 8.5 0.3 0.2 - 0.03 15 201130579 【<Νί 空調機* (dB) 1 I 44(合格） 1 43(合格） 45(合格） 1 1 1 1 1 62(不合格） I 流體噪音 (dB) 42(合格） 45(合格） 43(合格） 44(合格） 45(合格） 42(合格） 44(合格） 45(合格） 42(合格） 43(合格） 58(不合格） 57(不合格） 58(不合格） 彎曲加工性 合格 合格 合格 合格 合格 合格 合格 不合格 不合格 不合格 合格 合格 合格 Ph Q | 3.66 \^1\ 4.29 | | 3.69 A29J 2.57 5.29 1 2.12 1 Η 'Ο 3.05 4.23 d/Dd r- f i (N 19.05 15.88 22.68 15.88 1 18.14 19.05 15.88 1 23.81 19.05 19.84 1 14.43 13.61 間距 P(mm) 卜 m ^5 (N 卜 卜 m cn 卜 cn 卜 cn 00 寸 CN CN 谷部深度 Dd(mm) 1 0.45 〇 VO 〇 卜 〇 〇 in 〇 vo ο 寸· Ο ο οο ο 管料外徑 d(mm) 9.52 9.52 9.52 15.88 15.88 19.05 9.52 9.52 9.52 9.52 15.88 15.88 19.05 板厚 (mm) 寸 Ο m d cn 〇 cn 〇 m Ο ΓΛ d m o SI m ο m ο m ο ΓΟ Ο m d 鋼種 < < < < < < PQ < < < < < < d 1 < (N 寸 卜 1 * CN cn 寸 »〇 v〇 。蛱&^哿^<»『-』饀街--&-<贺蛱^>^茛窣夥糾* 16 201130579 [評價結果] 如表2所示，就彎曲加工性而言，板厚在本實施例之規 疋範圍之0.2〜0.4mm内之第1〜7實施例，已實現9〇度彎曲。 而，板厚不符本實施例之規定範圍之第1比較例及波形形狀 不付本貫施例之規定範圍之第2、3比較例則極為堅硬，因 此不易彎曲，而於中途挫曲。由此可知，第丨〜3比較例之可 挽丨生管極難以應用於藉人力進行曾曲加工之空調機室内外 機之連接配管等用途。 就流體噪音而言，板厚及波形形狀符合本實施例之規 定範圍之第1〜7實施例即便朝内部流入空氣，亦已確認不致 產生笛音般之異響。然而，波形形狀不符本實施例之規定 範圍之第4、5、6比較例則產生了笛音般之異響。由此可知， 第4〜6比較例之可撓性管極難以應用於空調機連接配管等。 其次，對實際之空調機連接上述之流體噪音測試中合 袼之第3、5、6實施例與不合格之第5比較例之可撓性管而 评價異響有無產生。結果’第3 ' 5、6實施例未產生異響。 相對於此’第5比較例則產生了笛音般之異響。如上所述， 已確認了與上述流體嗓音之測試結果相同之結果。 又’如上所述’已就表2所示之實施例及比較例之資 料，整理施工時之彎曲加工性及流體嗓音之產生之結果， 而顯示於第3圖之圖表。第3圖之圖表中之「〇合格」、「x不 合格」之標示位置上，左側係彎曲加工性之評價結果，右 側係流體噪音之產生之評價結果。 由第3圖之圖表可知，構成本實施例所規定之波形形狀S [Table 1] Composition of steel grade steel (mass percentage) C Si Μη Ρ S Cr Ni Cu Mo Ti NA 0.003 0.06 0.12 0.014 0.001 16.5 - - - 0.16 0.009 B 0.06 0.5 0.87 0.028 0.004 18.3 8.5 0.3 0.2 - 0.03 15 201130579 <Νί Air conditioner* (dB) 1 I 44 (pass) 1 43 (pass) 45 (pass) 1 1 1 1 1 62 (failed) I Fluid noise (dB) 42 (pass) 45 (pass) 43 ( Qualified) 44 (Qualified) 45 (Qualified) 42 (Qualified) 44 (Qualified) 45 (Qualified) 42 (Qualified) 43 (Qualified) 58 (Failed) 57 (Failed) 58 (Failed) Bending processability qualified Qualified, qualified, qualified, unqualified, unqualified, unqualified, qualified, qualified, qualified, Ph Q | 3.66 \^1\ 4.29 | | 3.69 A29J 2.57 5.29 1 2.12 1 Η 'Ο 3.05 4.23 d/Dd r- fi (N 19.05 15.88 22.68 15.88 1 18.14 19.05 15.88 1 23.81 19.05 19.84 1 14.43 13.61 Pitch P(mm) Bu m ^5 (N 卜卜 m cn 卜 卜 cn 00 inch CN CN Valley depth Dd(mm) 1 0.45 〇VO 〇 〇〇 in 〇 Vo ο 寸 · Ο ο οο ο Tube outer diameter d (mm) 9.52 9.52 9.52 15.88 15.88 19.05 9.52 9.52 9.52 9.52 15.88 15.88 19.05 Plate thickness (mm) inch Ο md cn 〇cn 〇m Ο ΓΛ dmo SI m ο m ο m ο ΓΟ Ο md steel type <<<<<<< PQ <<;<<<<< d 1 < (N inch Bu 1 * CN cn inch »〇v〇.蛱&^哿^<»『-』饀街--&-<贺蛱^>^茛窣茛窣纠* 16 201130579 [Evaluation Results] As shown in Table 2, in terms of bending workability, the first to seventh embodiments in which the sheet thickness is within 0.2 to 0.4 mm of the range of the present embodiment For example, 9 degree bending has been achieved. On the other hand, the first comparative example and the waveform shape in which the thickness does not conform to the range of the present embodiment are extremely hard, and the second and third comparative examples which do not satisfy the predetermined range of the present embodiment are extremely hard, and thus are not easily bent, but are buckling in the middle. From this, it can be seen that the disposable tube of the third to third comparative examples is extremely difficult to be applied to applications such as connection piping for indoor and outdoor air conditioners that have been subjected to manual processing. In the case of the fluid noise, the first to seventh embodiments in which the thickness and the waveform shape conform to the range of the present embodiment have confirmed that no noise is generated even if the air flows inward. However, the fourth, fifth, and sixth comparative examples in which the waveform shape does not conform to the range of the present embodiment produce a flute-like abnormal sound. From this, it is understood that the flexible tube of the fourth to sixth comparative examples is extremely difficult to be applied to an air conditioner connecting pipe or the like. Next, the actual air conditioner was connected to the flexible tubes of the third, fifth, and sixth embodiments of the fluid noise test described above and the fifth comparative example of the unacceptable one to evaluate the occurrence of abnormal noise. As a result, the '3' 5 and 6 examples did not produce abnormal noise. In contrast to the 'fifth comparative example, a noise-like abnormal sound was produced. As described above, the same results as those of the above-described fluid arpeggio have been confirmed. Further, as described above, the results of the examples and the comparative examples shown in Table 2, which are the results of the bending workability and the fluid noise during the construction, are shown in the graph of Fig. 3. In the graphs of Fig. 3, the evaluation results of the bending workability on the left side and the evaluation results of the generation of the fluid noise on the right side are indicated at the marked positions of "〇" and "x". As can be seen from the graph of Fig. 3, the waveform shape defined in this embodiment is formed.
S 17 201130579 之實施例（本實施例所規定之範圍内）之可撓性管在施工時 之彎曲加工性及流體噪音之產生之評價上，均屬合格(〇）， 在該等各特性上表現均優良。 由以上說明之實施例之結果，可知本發明之一態樣之 不鏽鋼製可撓性管甚為經濟，且可改善施工時之彎曲加工 性，並避免推測乃因冷媒氣體之流動所導致之流體噪音之 產生。 產業上之可利用性 依據本發明之一態樣之不鏽鋼製可撓性管，其施工時 之彎曲性優良，並可抑制流體噪音。又，與習知之銅管相 較，可實現輕量化，並大幅改善施工性。因此，本發明之 一態樣之不鏽鋼製可撓性管可利用作為諸如空調機連接配 管，而具極大之產業上之利用價值。 【圖式簡單說明】 第1圖係顯示本發明之實施例之不鏽鋼製可撓性管之 模式截面圖。 第2圖係說明本發明之實施例之不鏽鋼製可撓性管之 模式圖，且為顯示捲成線捲狀之狀態之立體圖。 第3圖係說明本發明之實施例之不鏽鋼製可撓性管之 模式圖，且為顯示可撓性管之波形形狀與施工時之彎曲加 工性及流體噪音之關係之圖表。 【主要元件符號說明】 10…可撓性管 14…擴口加工部 12…管料部 20…可撓部 18 201130579 22…山部 24…谷部 3〇…β刺!?八螺帽 40…可撓性管 d···管料外徑 Dd…谷部深度 dm…山部外徑 dt…外徑 dv…谷部外徑 Dw…間距 P···間距The flexible pipe of the embodiment of S 17 201130579 (within the range specified in the present embodiment) is qualified (〇) in the evaluation of the bending workability and the generation of fluid noise during construction, and in these characteristics Excellent performance. From the results of the above-described embodiments, it is understood that the stainless steel flexible tube of one aspect of the present invention is economical, and can improve the bending workability during construction, and avoids the fluid caused by the flow of the refrigerant gas. The generation of noise. Industrial Applicability According to one aspect of the present invention, a stainless steel flexible tube is excellent in bending property during construction and can suppress fluid noise. Moreover, compared with the conventional copper tube, weight reduction can be achieved, and the workability can be greatly improved. Therefore, the stainless steel flexible tube of one aspect of the present invention can be utilized as a connection pipe such as an air conditioner, and has great industrial value. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic cross-sectional view showing a stainless steel flexible tube according to an embodiment of the present invention. Fig. 2 is a schematic view showing a stainless steel flexible tube according to an embodiment of the present invention, and is a perspective view showing a state in which it is wound into a coil shape. Fig. 3 is a schematic view showing a stainless steel flexible tube according to an embodiment of the present invention, and is a graph showing the relationship between the waveform shape of the flexible tube and the bending workability and fluid noise during construction. [Explanation of main component symbols] 10...Flexible pipe 14...Expansion processing section 12...Tubing section 20...Flexible section 18 201130579 22...Mountain part 24...Valley section 3〇...β thorn!? Eight nut 40... Flexible tube d···tube outer diameter Dd...valley depth dm...mountain outer diameter dt...outer diameter dv...valley outer diameter Dw...pitch P···pitch