NO141882B - PRESSURE RELIEF TILT, SPECIFICALLY FOR GAS SHIP SHEETS - Google Patents

PRESSURE RELIEF TILT, SPECIFICALLY FOR GAS SHIP SHEETS Download PDF

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Publication number
NO141882B
NO141882B NO780804A NO780804A NO141882B NO 141882 B NO141882 B NO 141882B NO 780804 A NO780804 A NO 780804A NO 780804 A NO780804 A NO 780804A NO 141882 B NO141882 B NO 141882B
Authority
NO
Norway
Prior art keywords
hatch
pressure relief
frame
sealant
channel
Prior art date
Application number
NO780804A
Other languages
Norwegian (no)
Other versions
NO141882C (en
NO780804L (en
Inventor
Svend Martin Eilertsen
Sigvald Lima
Original Assignee
Moss Rosenberg Verft As
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Moss Rosenberg Verft As filed Critical Moss Rosenberg Verft As
Priority to NO780804A priority Critical patent/NO141882C/en
Priority to DE19792905959 priority patent/DE2905959A1/en
Priority to FI790634A priority patent/FI790634A/en
Priority to SE7901984A priority patent/SE7901984L/en
Priority to FR7905796A priority patent/FR2419444A1/en
Priority to PL1979213926A priority patent/PL119707B1/en
Publication of NO780804L publication Critical patent/NO780804L/en
Publication of NO141882B publication Critical patent/NO141882B/en
Publication of NO141882C publication Critical patent/NO141882C/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/14—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side with fracturing member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
    • B63J2/02—Ventilation; Air-conditioning
    • B63J2/10—Ventilating-shafts; Air-scoops
    • 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
    • F17C2203/01—Reinforcing or suspension means
    • F17C2203/011—Reinforcing means
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • 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
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/22—Assembling processes
    • F17C2209/221—Welding
    • 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
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0626—Pressure
    • 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
    • F17C2260/02—Improving properties related to fluid or fluid transfer
    • F17C2260/021—Avoiding over pressurising
    • 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
    • F17C2260/03—Dealing with losses
    • F17C2260/035—Dealing with losses of fluid
    • F17C2260/036—Avoiding leaks
    • 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
    • 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
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships
    • 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
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships
    • F17C2270/0107—Wall panels

Description

Oppfinnelsen vedrbrer en trykkavlastningsluke, The invention relates to a pressure relief hatch,

særlig for lasterom i gasskip. For LPG-skip med tanksystem- especially for holds in gas ships. For LPG ships with tank systems-

er som krever sekundærbarriere (forst og fremst fullkjblte prismatiske tanker) er det nodvendig å anordne trykkavlast-ningsinnretninger for lasterommene. Disse innretningene skal tre i funksjon i tilfelle stbrre gasslekkasje ifra primær-tankene, i hvilke tilfelle man ellers ville få en utillate- are that require a secondary barrier (primarily fully wired prismatic tanks), it is necessary to arrange pressure relief devices for the hold spaces. These devices must come into operation in the event of severe gas leakage from the primary tanks, in which case you would otherwise receive an unpermitted

lig trykkbkning med påfblgende fare for sprenging av skips-skroget, da jo den utlekkede gass med sitt lave kokepunkt meget raskt vil fordampe. similar pressure drop with the consequent danger of bursting the ship's hull, as the leaked gas with its low boiling point will evaporate very quickly.

Det er fra tidligere kjent en trykkavlastnings- It is from previously known a pressure relief

luke som i prinsippet er utfort som en fjærbelastet sikker-hetsventil. En ulempe ved en slik utfbrelse er at trykkavlastningsluken stadig må proves for at man skal være sikker på at den virker. Delvis som folge herav vil det oppstå pro-blemer med tetningen, en viktig konstruksjonsdetalj som det er vanskelig å etterprøve på en lettvint og entydig måte. Innlekking av vann er eksempelvis særdeles lite onskelig i rommene for de isolerte tankene. hatch which in principle is designed as a spring-loaded safety valve. A disadvantage of such a design is that the pressure relief hatch must constantly be tested in order to be sure that it works. Partly as a result of this, problems will arise with the seal, an important construction detail that is difficult to verify in an easy and unambiguous way. Leakage of water is, for example, extremely undesirable in the rooms for the insulated tanks.

En annen årsak til problematiske tetningsforhold Another cause of problematic sealing conditions

er det beskjedne pakningstrykk man må arbeide med, fordi luken jo skal kunne åpne ved en forholdsvis meget liten trykkforskjell, eksempelvis 0,25 bar. is the modest packing pressure you have to work with, because the hatch must be able to open at a relatively very small pressure difference, for example 0.25 bar.

Med utgangspunkt i den ovenfor nevnte problemstil-ling er det ifblge oppfinnelsen tilveiebragt en trykkavlastningsluke, særlig for lasterom i gasskip, men naturligvis ikke utelukkende for slike forhold, hvilken trykkavlastningsluke er kjennetegnet ved at den holdes i stengt stilling ved hjelp av én eller flere sprengbolter eller liknende, som er beregnet for sprengning eller brudd ved en forutbestemt trykkdifferanse over luken, og at luken er avtettet mot karmen med en fugemasse som er stbpt i en renne rundt lukekarmen og rundt en omlopende lukeflens som rager inn i rennen. Based on the above-mentioned problem, the invention provides a pressure relief hatch, particularly for cargo spaces in gas ships, but of course not exclusively for such conditions, which pressure relief hatch is characterized by being held in a closed position by means of one or more blasting bolts or similar, which is calculated for bursting or breaking in the event of a predetermined pressure difference across the hatch, and that the hatch is sealed against the frame with a sealant that is stuck in a channel around the hatch frame and around a circumferential hatch flange that projects into the channel.

En slik trykkavlastningsluke vil briste ved et onsket åpningstrykk, dvs. at den eller de nevnte sprengbolter brister. Et egnet åpningstrykk kan f.eks. være i stbrrelsesordenen 250 millibar differensialtrykk over luken. Den stbpte tetningsmasse gir en nærmest perfekt og vedlikeholdsfri tetning. Ved at fugemassen stbpes rundt lukeflensen som rager inn i en renne, kan man oppnå tilstrekkelig kontaktflate mellom fugemasse og lukeflensen, samtidig som lukens åpningsfunksjon ikke hindres. Such a pressure-relief hatch will burst at a desired opening pressure, i.e. that the said blasting bolt(s) burst. A suitable opening pressure can e.g. be in the order of 250 millibar differential pressure across the hatch. The stiffened sealant provides an almost perfect and maintenance-free seal. By stacking the sealant around the hatch flange that protrudes into a channel, a sufficient contact surface can be achieved between the sealant and the hatch flange, while at the same time the opening function of the hatch is not hindered.

Luken kan fordelaktig være hengselforbundet med karmen. Ved anvendelse av trykkavlastningsluken for det spesielt nevnte formål dreier det seg nemlig om relativt store luker med et areal på eksempelvis over 2 m 2■ og med en tilsvarende tyngde, og det er derfor en fordel at luken blir hengende ved karmen. The hatch can advantageously be hinged to the frame. When using the pressure relief hatch for the specifically mentioned purpose, it concerns relatively large hatches with an area of, for example, over 2 m 2 ■ and with a corresponding weight, and it is therefore an advantage that the hatch hangs from the frame.

Lukens åpningstrykk vil ganske entydig være bestemt av sprengbolten, fordi den anvendte fugemasse vil være så elastisk i forhold til sprengbolten at bare en ubetydelig kraft overfores av tetningen idet sprengbolten ryker. The hatch's opening pressure will be quite unambiguously determined by the blasting bolt, because the sealant used will be so elastic in relation to the blasting bolt that only an insignificant force is transmitted by the seal as the blasting bolt breaks.

Når sprenbolten forst er r"dket, vil tetningen ikke være sterk nok til å holde luken lukket. Once the bolt has been fired, the seal will not be strong enough to hold the hatch closed.

For å få en skikkelig tetning er det fordelaktig forst å fylle flytende fugemasse i rennen i en hoyde som til-svarer hbyden av lukekarmen, idet rennens andre sidevegg er hbyere. Luken er da allerede satt på plass, slik at flensen griper inn i rennen. Når den forst ifylte masse er herdet, kan så ytterligere fugemasse fylles på, og til slutt kan man fordelaktig ha på et tynt lag av en særlig motstandsdyktig og væskebestandig materialtype, f.eks. silikon. In order to get a proper seal, it is advantageous to first fill liquid sealant in the channel to a height that corresponds to the height of the hatch frame, as the other side wall of the channel is higher. The hatch is then already set in place, so that the flange engages in the gutter. When the initially filled compound has hardened, further sealant can then be added, and finally a thin layer of a particularly resistant and liquid-resistant type of material can be advantageously applied, e.g. silicone.

Oppfinnelsen skal forklares nærmere under henvis-ning til tegningene hvor The invention shall be explained in more detail with reference to the drawings where

fig. 1 viser et snitt gjennom en trykkavlastningsluke med tilhbrende karm, fig. 1 shows a section through a pressure relief hatch with associated frame,

fig. 2 viser et detaljert utsnitt av det innsirk-lede området i fig. 1, fig. 2 shows a detailed section of the circled area in fig. 1,

fig. 3 viser et grunnriss av lukeanordningen i fig. 3 shows a plan view of the hatch device i

fig. 1 og fig. 1 and

fig. 4 viser et snitt gjennom en trykkavlastningsluke som i fig. 1, men med en annen dempeanordning. fig. 4 shows a section through a pressure relief hatch as in fig. 1, but with a different damping device.

I fig. 1 er et skipsdekk betegnet med 1 og en åp-ning i dette er betegnet med 2. Rundt åpningen er det plas-sert en lukekarm 3 som overst er lukket med en luke 4. Rundt lukekarmen går det en renne 4 hvori en på luken 4 fastsveiset flens 6 rager ned. In fig. 1 is a ship's deck denoted by 1 and an opening in this is denoted by 2. Around the opening there is a hatch frame 3 which is closed at the top with a hatch 4. Around the hatch frame there is a chute 4 in which one on the hatch 4 welded flange 6 projects downwards.

På lukens overside er det to avstivende ribber 7 On the upper side of the hatch there are two stiffening ribs 7

og 8 hvormed luken er svingbart opplagret om en dreieaksel 9 and 8 with which the hatch is pivotally supported on a pivot shaft 9

i en brakett 10 fastsveiset på lukekarmen 3. En brakett 11 in a bracket 10 welded to the hatch frame 3. A bracket 11

er fastsveiset til den motstående side av luken og luken er ved hjelp av en bolt 12 holdt fast i lukket stilling idet bolten 12 er skrudd fast til braketten 11 og til en brakett 13 fastsveiset til lukekarmen 3. Bolten 12 har et avsmalnet midtparti og virker således som en sprengbolt, dvs. at den brister ved en forutbestemt belastning. For å dempe lukens 4 åpningsbevegelse er det i dette utfbrelseseksempel på inn-siden av luken 4 anordnet to hydrauliske stbtdempere 14, 15 som er leddtilknyttet lukekarmen 3 ved 16 og et ore 17 på luken 4 ved 18. is welded to the opposite side of the hatch and the hatch is held in the closed position by means of a bolt 12, as the bolt 12 is screwed to the bracket 11 and to a bracket 13 welded to the hatch frame 3. The bolt 12 has a tapered central part and thus works like a blasting bolt, i.e. that it bursts under a predetermined load. In order to dampen the opening movement of the hatch 4, in this design example two hydraulic shock absorbers 14, 15 are arranged on the inside of the hatch 4, which are articulated to the hatch frame 3 at 16 and an ore 17 on the hatch 4 at 18.

På utsiden av lukekarmen 3 er det rundt karm-åpningen fastsveiset et vinkeljern slik at det dannes en omlbpende renne 5 hvori flensen 6 på luken 4 griper ned når luken er lukket, se særlig fig. 2. Rennen 5 er istbpt et egnet tetningsmateriale, f.eks. en akrylmasse. Tilveiebring-elsen av tetningen skjer fordelaktig på den måten at man fbrst stbper ut et nedre lag 19, omtrent til hbyde med lukekarmen 3, som utgjbr den indre vegg i rennen 5. Etter at dette fbrste istbpte lag 19 er herdet, stbpes så neste lag 20, også av akrylmasse, og det hele avsluttes så med i dette tilfellet et silikonbelegg 21. On the outside of the hatch frame 3, an angle iron is welded around the frame opening so that a circling channel 5 is formed in which the flange 6 of the hatch 4 grips when the hatch is closed, see especially fig. 2. The channel 5 is preferably a suitable sealing material, e.g. an acrylic mass. The provision of the seal takes place advantageously in such a way that a lower layer 19 is first stepped out, approximately at the height of the hatch frame 3, which forms the inner wall of the channel 5. After this first stepped layer 19 has hardened, the next layer is then stepped 20, also of acrylic mass, and the whole thing is then finished with, in this case, a silicone coating 21.

Lukens åpningstrykk vil være entydig bestemt av sprengbolten, fordi fugemassen er så elastisk i forhold til bolten at bare en ubetydelig kraft overfares av tetningen når bolten ryker. Når bolten forst er rbket, er ikke tetningen sterk nok til å holde luken lukket. Konstruksjonen er dog slik at man oppnår tilstrekkelig kontaktflate mellom fugemasse og lukeflens, uten at lukens åpningsfunksjon hindres. Tetningen er i praksis perfekt og vedlikeholdsfri. De anordnede støtdempere tjener til å redusere sjokket når luken stanser i åpen stilling. Ved det spesielt angitte anvendelsesformål vil en utlekking av så store gassmengder The hatch's opening pressure will be uniquely determined by the blasting bolt, because the sealant is so elastic in relation to the bolt that only an insignificant force is exceeded by the seal when the bolt breaks. When the bolt is first broken, the seal is not strong enough to keep the hatch closed. However, the construction is such that a sufficient contact surface is achieved between the sealant and the hatch flange, without the hatch's opening function being impeded. The seal is practically perfect and maintenance-free. The provided shock absorbers serve to reduce the shock when the hatch stops in the open position. For the specifically stated purpose of use, a leakage of such large quantities of gas will

at det forer til at trykkavlastningsanordningene må tre i funksjon, representere en så betydelig skade, nærmest et havari, at det må treffes helt spesielle tiltak, og i tråd med dette er det således ikke nbdvendig å tilveiebringe noen form for automatisk lukking av luken. that it leads to the pressure relief devices having to come into operation, represents such significant damage, almost an accident, that very special measures must be taken, and in line with this it is thus not necessary to provide any form of automatic closing of the hatch.

Utfbrelsesen i fig. 4 er i realiteten som i fig. 1, med unntak av dempeanordningen som i fig. 4 er utfort som et tauelement 22 med en innkoblet fjær 23. Det anvendte tauelement kan f.eks. være et fibertau, mens fjæren som vist er en såkalt fortbyningsfjær. The embodiment in fig. 4 is in reality as in fig. 1, with the exception of the damping device as in fig. 4 is designed as a rope element 22 with a connected spring 23. The rope element used can e.g. be a fiber rope, while the spring, as shown, is a so-called fortie spring.

Claims (5)

1. Trykkavlastningsluke, særlig for lasterom i gass-skip, karakterisert ved at den holdes i stengt stilling ved hjelp av én eller flere sprengbolter (12) eller liknende som er beregnet for -sprengning eller brudd ved en forutbestemt trykkdifferanse over luken (4), og at luken er avtettet mot karmen (3) med en fugemasse (19, 20, 21) som er stbpt i en renne (5) rundt lukekarmen, rundt en omlbpende lukeflens (6) som rager ned i rennen.1. Pressure relief hatch, particularly for cargo spaces in gas ships, characterized by being held in a closed position by means of one or more blasting bolts (12) or similar that are intended for bursting or breaking in the event of a predetermined pressure difference across the hatch (4), and that the hatch is sealed against the frame (3) with a sealant (19, 20, 21) which is stuck in a channel (5) around the hatch frame, around a running hatch flange (6) that projects down into the channel. 2. Trykkavlastningsluke ifblge krav 1, karakterisert ved at rennens ytre sidevegg (5) er hbyere enn den indre sidevegg, som fortrinnsvis utgjores av lukekarmen (3). 2. Pressure relief hatch according to claim 1, characterized in that the outer side wall (5) of the chute is higher than the inner side wall, which is preferably formed by the hatch frame (3). 3. Trykkavlastningsluke ifblge krav 1, karakterisert ved at luken er hengselforbundét (9) med karmen. 3. Pressure relief hatch according to claim 1, characterized in that the hatch is hinged (9) to the frame. 4. Trykkavlastningsluke ifblge krav 1, k a r a k-terisert ved at fugemassen er stopt i flere lag (19, 20, 21). 4. Pressure relief hatch according to claim 1, characterized in that the sealant is stopped in several layers (19, 20, 21). 5. Trykkavlastningsluke ifblge krav 1, karakterisert ved at fugemassen er en akrylmasse (19, 20) med et toppsjikt av silikon (21).5. Pressure relief hatch according to claim 1, characterized in that the sealant is an acrylic compound (19, 20) with a top layer of silicone (21).
NO780804A 1978-03-08 1978-03-08 PRESSURE RELIEF TILT, SPECIFICALLY FOR GAS SHIP SHEETS NO141882C (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NO780804A NO141882C (en) 1978-03-08 1978-03-08 PRESSURE RELIEF TILT, SPECIFICALLY FOR GAS SHIP SHEETS
DE19792905959 DE2905959A1 (en) 1978-03-08 1979-02-13 PRESSURE RELIEF HATCH, IN PARTICULAR FOR LOAD COMPARTMENTS IN GAS SHIPS
FI790634A FI790634A (en) 1978-03-08 1979-02-26 TRYCKAVLASTNINGSLUCKA SAERSKILT FOER LASTRUM I GASTRANSPORTFARTYG
SE7901984A SE7901984L (en) 1978-03-08 1979-03-05 PRESSURE RELIEF HATCH, SEPARATE FOR CARGO TASK IN GAS TANK
FR7905796A FR2419444A1 (en) 1978-03-08 1979-03-06 Pressure release hatch for gas tank ship holds - has calibrated shear bolts and cover with flange fitting into acrylic!-silicone sealed groove
PL1979213926A PL119707B1 (en) 1978-03-08 1979-03-06 Decompression manhole

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO780804A NO141882C (en) 1978-03-08 1978-03-08 PRESSURE RELIEF TILT, SPECIFICALLY FOR GAS SHIP SHEETS

Publications (3)

Publication Number Publication Date
NO780804L NO780804L (en) 1979-09-11
NO141882B true NO141882B (en) 1980-02-18
NO141882C NO141882C (en) 1980-05-28

Family

ID=19884084

Family Applications (1)

Application Number Title Priority Date Filing Date
NO780804A NO141882C (en) 1978-03-08 1978-03-08 PRESSURE RELIEF TILT, SPECIFICALLY FOR GAS SHIP SHEETS

Country Status (6)

Country Link
DE (1) DE2905959A1 (en)
FI (1) FI790634A (en)
FR (1) FR2419444A1 (en)
NO (1) NO141882C (en)
PL (1) PL119707B1 (en)
SE (1) SE7901984L (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GR74799B (en) * 1980-02-21 1984-07-12 Bastian Wolfgang
US4388940A (en) * 1981-03-23 1983-06-21 Anderson, Greenwood & Co. Pressure relief device
DE3114941C2 (en) * 1981-04-13 1983-07-28 Jansens & Dieperink B.V., 1505 Zaandam Explosion lock plate
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EP1957839B1 (en) 2005-12-05 2020-08-26 BS & B Safety Systems Limited Pressure relief device
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GB2504533B (en) * 2012-08-02 2014-06-18 Bioquell Uk Ltd Valve for protecting an enclosure from shock waves
CN103437442B (en) * 2013-08-07 2016-03-30 江苏爵格工业设备有限公司 A kind of pressure relief device

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Also Published As

Publication number Publication date
DE2905959A1 (en) 1979-09-13
NO141882C (en) 1980-05-28
PL213926A1 (en) 1980-01-02
NO780804L (en) 1979-09-11
SE7901984L (en) 1979-09-09
FR2419444A1 (en) 1979-10-05
FI790634A (en) 1979-09-09
PL119707B1 (en) 1982-01-30

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