JPH0371599B2 - - Google Patents
Info
- Publication number
- JPH0371599B2 JPH0371599B2 JP56180990A JP18099081A JPH0371599B2 JP H0371599 B2 JPH0371599 B2 JP H0371599B2 JP 56180990 A JP56180990 A JP 56180990A JP 18099081 A JP18099081 A JP 18099081A JP H0371599 B2 JPH0371599 B2 JP H0371599B2
- Authority
- JP
- Japan
- Prior art keywords
- tank
- security
- inspection
- space
- safety
- 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
- 238000007689 inspection Methods 0.000 claims description 40
- 230000001681 protective effect Effects 0.000 claims description 24
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 22
- 239000001301 oxygen Substances 0.000 claims description 22
- 229910052760 oxygen Inorganic materials 0.000 claims description 22
- 239000007789 gas Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 6
- 230000000241 respiratory effect Effects 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 description 6
- 238000007599 discharging Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000029058 respiratory gaseous exchange Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
- F17C13/126—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures for large storage containers for liquefied gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0602—Wall structures; Special features thereof
- F17C2203/0612—Wall structures
- F17C2203/0626—Multiple walls
- F17C2203/0629—Two walls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
- F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/04—Reducing risks and environmental impact
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、LPGやLNGを貯蔵する二重殻式
低温タンクの保安点検方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a safety inspection method for a double-shell cryogenic tank for storing LPG or LNG.
（従来の技術及び発明が解決しようとする課題）
周知の通り、LPGやLNGを液化ガスとして貯
蔵する低温タンクは、プロパンの場合は約−42
℃、LNGであるメタンで−162℃ときわめて過酷
な条件下で貯蔵されるもので、しかも可燃性の危
険物であるため、その貯蔵タンクとしての保安や
メインテナンスに万全の配慮が要求されるもので
ある。(Prior art and problems to be solved by the invention) As is well known, low-temperature tanks that store LPG and LNG as liquefied gases have a temperature of approximately -42% in the case of propane.
℃, LNG is methane, which is stored under extremely harsh conditions of -162℃, and is a flammable and dangerous substance, so thorough consideration is required for security and maintenance as a storage tank. It is.
従来この保安やメインテナンスのための点検を
実施するにあたつては、まず貯蔵液を完全に払い
出すとともに窒素パージなどにより安全性を確保
したのち点検員がタンク内にはいり行うのが一般
とされている。 Conventionally, when carrying out inspections for safety and maintenance purposes, it has been common practice for inspectors to first drain out the stored liquid completely and ensure safety through nitrogen purges, etc. before entering the tank. ing.
ところで、この保安点検のためにいちいち貯蔵
液の払い出しをやることは、非常に面倒な作業で
コスト的にも不経済である。 By the way, discharging the stored liquid every time for this safety inspection is a very troublesome task and is uneconomical in terms of cost.
そこで本発明は、貯蔵液の払い出しを行うこと
なく、貯蔵した状態のまま低温液化ガスを貯蔵す
る内槽と保冷層を設ける外槽との間の空間に防護
具を着用した作業者ががタンク屋根のマンホール
から入つてタンクの周壁面、特に内槽の外周壁面
や底板と外周壁との接合部であるタライまわり等
のひび割れその他の異常の有無を点検できるよう
にし、かつ、作業者がマンホールと保安点検用通
路間の昇降時および通路内での作業中において、
前記空間内の保冷効果を損なうことなく、該空間
内を安全な雰囲気に確保できるようにした二重殻
式低温タンクの保安点検方法を提供することにあ
る。 Therefore, the present invention enables workers wearing protective gear to enter the tank without discharging the stored liquid, in the space between the inner tank that stores the low-temperature liquefied gas and the outer tank that has a cold insulation layer. The system allows workers to enter through the manhole in the roof and inspect the surrounding wall of the tank for cracks and other abnormalities, especially around the outer wall of the inner tank and the area around the bottom plate and outer wall. When climbing between
It is an object of the present invention to provide a safety inspection method for a double-shell type low-temperature tank, which makes it possible to maintain a safe atmosphere in the space without impairing the cold insulation effect in the space.
（問題を解決するための手段）
前述の課題を解決するためにこの発明は、低温
液化ガスを収容する内槽と保冷槽を設けた外槽と
の間に大気圧よりやや高い圧力の不活性ガスを充
填した空間を設けた二重殻式低温タンクの保安点
検に際し、緊急用の空気ないし酸素の補給用ボン
ベを備え、かつ全身を覆う低温に強く気密な防護
具を前記タンク外で保安点検者が着用し、タンク
屋根に設けたマンホールより空間内に設けた保安
点検用通路に降りる間は、前記補給用ボンベを使
用し、かつ防護具から呼吸排気ガスが該空間内に
漏れないようにし、保安点検者が保安点検用通路
に降りた後は、前記防護具に設けた空気ないし酸
素の供給ホースと排気ホースを保安点検用通路に
設けた対応する空気ないし酸素の供給用ノズルと
排気用ノズルにそれぞれ接続して保安点検作業を
行ない、作業終了後は前記ホースを前記ノズルか
ら外し、保安点検用通路から前記マンホールに出
るまでの間は、再び前記補給用ボンベを使用する
ものである。(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides an inert tank with a pressure slightly higher than atmospheric pressure between an inner tank containing low-temperature liquefied gas and an outer tank provided with a cold storage tank. During a safety inspection of a double-shell cryogenic tank with a gas-filled space, a safety inspection is conducted outside the tank equipped with an emergency air or oxygen supply cylinder and wearing airtight protective gear that is resistant to low temperatures and covering the entire body. While descending from the manhole provided on the tank roof to the security inspection passage provided within the space, the person must use the replenishment cylinder and ensure that respiratory exhaust gas does not leak into the space from the protective equipment. After the security inspector descends to the security inspection passage, connect the air or oxygen supply hose and exhaust hose provided on the protective equipment to the corresponding air or oxygen supply nozzle and exhaust hose provided in the security inspection passage. The hoses are connected to the nozzles to perform safety inspection work, and after the work is completed, the hoses are removed from the nozzles and the replenishment cylinders are used again until they exit from the safety inspection passageway to the manhole.
すなわち、あらかじめ保安点検用の通路１１の
所定の個所に空気ないし酸素の供給ノズル１２お
よび排気ノズル１３を設けておくとともに、他方
断熱性、気密性を有する布材、例えば気密処理を
ほどこしたナイロンのような合成せんいとガラス
せんいとからなる布材で作つた空気ないし酸素の
供給、排気機構を備えた防護服１と防護面２とを
保安点検者がタンク外において着用し、かつ緊急
用の補給ボンベ６を背負つてタンク屋根に設けた
マンホール１４より入り、該緊急用の補給ボンベ
６は、マンホール１４と通路１１間を昇降する際
に使用し、通路１１内では、防護服１に備えた空
気ないし酸素の供給、排気機構と前記通路に設け
た空気ないし酸素の供給ノズル１２および排気ノ
ズル１３とをそれぞれ接続して保安点検作業を行
うようにしたものである。 That is, an air or oxygen supply nozzle 12 and an exhaust nozzle 13 are provided in advance at predetermined locations in the passage 11 for security inspection, and on the other hand, a cloth material having heat insulating and airtight properties, such as nylon treated to be airtight, is installed. Protective clothing 1 and protective face 2, which are equipped with an air or oxygen supply and exhaust mechanism made of a cloth material made of synthetic fibers and glass fibers, are worn by safety inspectors outside the tank, and are used for emergency supplies. The emergency supply cylinder 6 is entered through a manhole 14 provided on the tank roof with the cylinder 6 on one's back.The emergency supply cylinder 6 is used when going up and down between the manhole 14 and the passage 11. The safety inspection work is performed by connecting the oxygen supply/exhaust mechanism to the air/oxygen supply nozzle 12 and exhaust nozzle 13 provided in the passage.
（実施例）
さらにこれを実施例図に基づき具体的に説明す
ると、まず第１図で示すのは、本発明による点検
方法を実施する二重殻式低温タンクでITは内槽、
OTは外槽、Ｉは断熱層で、IFは断熱床である。(Example) To further explain this in detail based on example diagrams, first of all, Fig. 1 shows a double-shelled low-temperature tank in which the inspection method according to the present invention is implemented, and IT is an inner tank,
OT is the outer tank, I is the insulation layer, and IF is the insulation floor.
内槽ITは、この断熱床IFの上に据置され、外
槽OTとの間の空間に保安点検用通路１１が設け
てある。 The inner tank IT is placed on this heat insulating floor IF, and a security inspection passage 11 is provided in the space between it and the outer tank OT.
保安点検用通路１１を設けた空間は、保冷効果
の低減を防止し、更に万一内槽から可燃ガスが漏
出したとしても爆発しないように、大気圧よりや
や高い圧力の乾燥した不活性ガスを充填して、水
分と酸素を含んだ外気の侵入を防止するように形
成してある。 The space provided with the security inspection passageway 11 is filled with dry inert gas at a pressure slightly higher than atmospheric pressure to prevent a reduction in the cooling effect and to prevent an explosion even if flammable gas leaks from the inner tank. It is filled to prevent outside air containing moisture and oxygen from entering.
また、１２はこの保安点検用通路１１に設けた
空気ないし酸素の供給ノズル１３はその排気ノズ
ルである。 Further, reference numeral 12 denotes an air or oxygen supply nozzle 13 provided in this safety inspection passage 11, and an exhaust nozzle thereof.
１４は保安点検者が前記通路１１へ入るための
タンク屋根に設けたマンホールであり、１５は階
段、さらに１６は内槽ITへの貯蔵液の受払い管
である。 14 is a manhole provided on the tank roof for a security inspector to enter the passage 11, 15 is a staircase, and 16 is a pipe for receiving and discharging stored liquid to the inner tank IT.
第２図で示す３が保安点検用防護具で、防護服
１および防護面２より構成され、４および５はそ
の防護具３に仕組まれている空気ないし酸素の供
給、排気機構に接続する空気ないし酸素の供給ホ
ースおよび排気ホースである。マンホール１４か
ら通路１１に降りた保安点検者は、該保安点検用
通路１１内で、この供給ホース４および排気ホー
ス５を前記通路１１の供給ノズル１２および１３
にそれぞれ接続し、この接続によつて保安点検者
の呼吸作用を支え、同時に保安点検者の呼吸排気
ガスが空間内に漏れないようになる。 3 shown in Fig. 2 is a protective equipment for safety inspection, which is composed of a protective clothing 1 and a protective surface 2, and 4 and 5 are air connected to the air or oxygen supply and exhaust mechanism built into the protective equipment 3. or oxygen supply hose and exhaust hose. A security inspector who has descended from the manhole 14 to the passage 11 passes the supply hose 4 and exhaust hose 5 to the supply nozzles 12 and 13 of the passage 11 within the security inspection passage 11.
This connection supports the breathing action of the safety inspector, and at the same time prevents the breathing exhaust gas of the safety inspector from leaking into the space.
６は緊急用の空気ないし酸素の補給用ボンベで
保安点検者がマンホール１４と通路１１の間を昇
降する場合に使用するものである。この補給用ボ
ンベ６の使用によつて空気ないし酸素の補給を行
い、同時に保安点検者の呼吸排気ガスは保安点検
用防護具３内に排出したり、また別途排気袋やボ
ンベ等に回収したりして、呼吸排気ガスが保安点
検用防護具３から空間内に漏れないようにしてい
る。また、７は外部との連絡をとるための無線ア
ンテナ、８は照明具を入れるポケツトである。 Reference numeral 6 denotes an emergency air or oxygen supply cylinder, which is used by security inspectors when going up and down between the manhole 14 and the passage 11. By using this replenishment cylinder 6, air or oxygen is supplied, and at the same time, the breathing exhaust gas of the safety inspector is discharged into the safety inspection protective equipment 3, or collected separately into an exhaust bag, cylinder, etc. This prevents respiratory exhaust gas from leaking into the space from the safety inspection protective equipment 3. Further, 7 is a wireless antenna for communicating with the outside, and 8 is a pocket for storing lighting equipment.
（効果）
本発明による保安点検方法は、上述説明したよ
うに特殊な防護具を着用してタンク内に入り点検
作業ができるため、従来のように内槽内の貯蔵液
をいちいち払出す必要がなく点検ができ、保安の
維持が一段と高くなり、かつまた保安点検に要す
る経費の削減も可能である。(Effects) As explained above, the safety inspection method according to the present invention allows inspection work to be carried out by entering the tank wearing special protective equipment, so there is no need to drain out the liquid stored in the inner tank one by one as in the conventional method. Inspections can be carried out without any problems, the maintenance of security is further improved, and it is also possible to reduce the cost required for security inspections.
また、この発明は補給用ボンベを備えた上記防
護具を点検者がタンク外で着用し、マンホールと
空間内の通路間の昇降時には、補給用ボンベの使
用によつて空気ないし酸素の補給を行い、同時に
保安点検者の呼吸排気ガスが防護具から空間内に
漏れないようにし、また、前記空間内で作業をし
ている間も、防護具に設けた供給、排気ホースと
通路に設けた供給、排気用ノズルとそれぞれ接続
することにより、作業者の水分を含んだ吐く息が
該空間内に充満することが全く無いので保冷効果
が維持され、更に、作業者から排出される呼気残
酸素等のガスはタンクの系外に排出されるので空
間内には爆発等を誘引されるガスが入ることも全
く無く、保安上からも安全である。 In addition, this invention allows the inspector to wear the above-mentioned protective gear equipped with a replenishment cylinder outside the tank, and to use the replenishment cylinder to replenish air or oxygen when going up and down between the manhole and the passageway in the space. At the same time, it is necessary to prevent the breathing exhaust gases of safety inspectors from leaking from the protective equipment into the space, and also to ensure that the supply installed in the protective equipment, the exhaust hose and the supply installed in the passageway are maintained while working in the space. , by connecting them to the exhaust nozzles, the worker's exhaled breath containing moisture does not fill the space at all, so the cold insulation effect is maintained, and furthermore, the exhaled residual oxygen etc. discharged from the worker is maintained. Since the gas is discharged outside the tank system, there is no possibility that any gas that could cause an explosion will enter the space, and it is safe from a security standpoint.
また、保安点検者は、タンク屋根に設けたマン
ホールより入つて通路間を昇降する際には緊急用
の補給ボンベを使用するので、移動に際してホー
ス等がじやまになり出入り及び昇降に支障となる
ことがない。また緊急脱出時にも使用でき安全で
ある。 In addition, security inspectors enter through a manhole on the tank roof and use emergency supply cylinders when going up and down between aisles, so the hoses, etc. get stuck when moving, making it difficult to get in and out and go up and down. Never. It is also safe and can be used during an emergency evacuation.
また、通路内で点検作業をする際には、通路に
設けた供給用ノズルおよび排気用ノズルに防護具
を接続して行うので、長時間検点作業を続けるこ
とができる。 Furthermore, when performing inspection work in the passageway, protective gear is connected to the supply nozzle and exhaust nozzle provided in the passageway, so the inspection work can be continued for a long time.
第１図は本発明による保安点検方法を実施する
二重殻式低温タンクの左半分を縦断して示す構造
図、第２図は保安点検用防護具を装備し、タンク
内に入つた状態を示すものである。
IT…内槽、OT…外槽、Ｉ…断熱層、IF…断熱
床、１…保安点検用防護服、２…保安点検用防護
面、３…保安点検用防護具、４…空気ないし酸素
の供給ホース、５…空気ないし酸素の排気ホー
ス、６…緊急用の補給ボンベ、７…無線アンテ
ナ、８…照明具用ポケツト、１１…保安点検用通
路、１２…空気ないし酸素供給ノズル、１３…空
気ないし酸素排気ノズル、１４…マンホール、１
５…階段、１６…貯蔵液受払管。
Figure 1 is a vertical cross-sectional view of the left half of a double-shell cryogenic tank in which the safety inspection method according to the present invention is implemented, and Figure 2 shows the state inside the tank equipped with protective equipment for security inspection. It shows. IT...inner tank, OT...outer tank, I...insulating layer, IF...insulating floor, 1...protective clothing for security inspection, 2...protective surface for security inspection, 3...protective equipment for security inspection, 4...air or oxygen Supply hose, 5...Air or oxygen exhaust hose, 6...Emergency supply cylinder, 7...Radio antenna, 8...Lighting device pocket, 11...Security inspection passage, 12...Air or oxygen supply nozzle, 13...Air or oxygen exhaust nozzle, 14...manhole, 1
5...Stairs, 16...Stored liquid receiving and discharging pipe.
Claims (1)
た外槽との間に大気圧よりやや高い圧力の不活性
ガスを充填した空間を設けた二重殻式低温タンク
の保安点検方法において、緊急用の空気ないし酸
素の補給用ボンベを備え、かつ全身を覆う低温に
強く気密な防護具を前記タンク外で保安点検者が
着用し、タンク屋根に設けたマンホールより空間
内に設けた保安点検用通路に降りる間は、前記補
給用ボンベを使用し、かつ防護具から呼吸排気ガ
スが該空間内に漏れないようにし、保安点検者が
保安点検用通路に降りた後は、前記防護具に設け
た空気ないし酸素の供給ホースと排気ホースを保
安点検用通路に設けた対応する空気ないし酸素の
供給用ノズルと排気用ノズルにそれぞれ接続して
保安点検作業を行ない、作業終了後は前記ホース
を前記ノズルから外し、保安点検用通路から前記
マンホールに出るまでの間は、再び前記補給用ボ
ンベを使用することを特徴とする二重殻式低温タ
ンクの保安点検方法。1. In a safety inspection method for a double-shell cryogenic tank, which has a space filled with inert gas at a pressure slightly higher than atmospheric pressure between the inner tank containing low-temperature liquefied gas and the outer tank provided with a cold insulation layer, A security check is carried out inside the space through a manhole on the tank roof, with a safety checker equipped with an emergency air or oxygen supply cylinder, and wearing protective equipment that is resistant to low temperatures and airtight to cover the entire body outside the tank. While descending to the security inspection corridor, use the replenishment cylinder and prevent respiratory exhaust gas from leaking into the space from the protective equipment, and after the security inspector descends to the security inspection corridor, use the above-mentioned protective equipment. Perform safety inspection work by connecting the provided air or oxygen supply hose and exhaust hose to the corresponding air or oxygen supply nozzle and exhaust nozzle provided in the safety inspection passage, and then connect the hoses after completing the work. A method for security inspection of a double-shelled low temperature tank, characterized in that the replenishment cylinder is used again until it is removed from the nozzle and exits from the security inspection passageway to the manhole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18099081A JPS5884297A (en) | 1981-11-13 | 1981-11-13 | Security check method for double-shell low temperature tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18099081A JPS5884297A (en) | 1981-11-13 | 1981-11-13 | Security check method for double-shell low temperature tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5884297A JPS5884297A (en) | 1983-05-20 |
| JPH0371599B2 true JPH0371599B2 (en) | 1991-11-13 |
Family
ID=16092804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18099081A Granted JPS5884297A (en) | 1981-11-13 | 1981-11-13 | Security check method for double-shell low temperature tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5884297A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006016853A1 (en) * | 2004-08-13 | 2006-02-16 | Sia Engineering Company Limited | Apparatus for the maintenance of aircraft |
| DE102011010121B4 (en) * | 2011-02-02 | 2016-09-01 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Walk-in cooling system, in particular for the cryopreservation of biological samples, and method for their operation |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5162597A (en) * | 1974-11-27 | 1976-05-31 | Yoshio Shimada | Netsuki jugaigasutonitaisuru atsusakukukiomochiita bogosobi |
| JPS5364817A (en) * | 1976-11-22 | 1978-06-09 | Idemitsu Kosan Co | System for sealing tanks at low pressure |
-
1981
- 1981-11-13 JP JP18099081A patent/JPS5884297A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5162597A (en) * | 1974-11-27 | 1976-05-31 | Yoshio Shimada | Netsuki jugaigasutonitaisuru atsusakukukiomochiita bogosobi |
| JPS5364817A (en) * | 1976-11-22 | 1978-06-09 | Idemitsu Kosan Co | System for sealing tanks at low pressure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5884297A (en) | 1983-05-20 |
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