hatch cover weathertightness

Unfortunately, there are two serious problems with the LLC as a form of weathertightness evidence. 0000016687 00000 n A well known problem on ships of some age is advanced corrosion around the passage of the cleat through the hatch coaming top plate. Shop with confidence - get free shipping to home or stores + price match guarantee! Traditionally sponge rubber packing was used pressing it against the edge of a compression bar. Defects to hatch covers and coamings Various types of defect found in hatch covers are mostly due to lack of maintenance or by improper operation. The full weight of the hatch covers is not supposed to be borne by the gaskets alone, only to the extent that the correct design compression of the gasket is achieved, and then limited by the hatch cover resting steel to steel on the coaming top. Once again, the cleat and wedges need not be in a secured position. Hatch Cover Hose Test Hatch Covers Hose Test Hatch cover hose tests are conducted to determine weathertightness of hatch covers. Unfortunately, there are two serious problems with the LLC as a form of weathertightness evidence. Folding hatch covers for bulk carriers. Some defects affecting the weathertightness of hatch covers can be attributed to their design. Window Well Covers, Grates, and Egress Kits Join over 400,000 satisfied homeowners. The only disadvantage with this method is probably that it is not always much liked by all ship managers, as “too many leakages” are detected. High stowing type hatch covers, like the folding type, are sometimes left unsecured in raised position. That represents a danger to the crew and stevedores, and the hatch covers themselves may be seriously damaged if they fall. Testing of weather tight integrity of hatch covers Different testing methods available and they can be used individually or in combination with other testing methods to get the best results. Means of securing – There are various ways to secure the hatch covers once they are in place, depending on the type. Gaskets may be of solid rubber, or have a hollow or sponge core. Hatch coaming top with gutter, compressionbar and bearing pads in good condition. To ensure that the hatch covers are weathertight the sealing system needs to be in a good condition. The pipes need to be fitted with a non-return device, in order to avoid that green sea on deck finds its way into the cargo hold through the drains. On oldcleats the rubber washer is often hard and treads and nutsare corroded due to lack of maintenance. Different Types of Testing Methods 14 minutes. Members are strongly recommended to include instructions from hatch cover manufacturers in the vessel maintenance program, including records of maintenance, tests and repairs. Depending on the magnitude of the relative movements, there is a range of 95. Folding hatch covers are used on Handysize and Handymax bulk carriers, where it is particularly important to maximise hatch dimensions in relation to the ship’s beam. The hatch coaming gutters will drain the water aft to drain pipes. Deficiencies should be reported to the Master, who should be asked for his intentions to remedy them. Hatch cover rubber packing. $21.95 $ 21. 3.2 Weathertight Hatch Covers 3.2.1 Drainage is to be arranged inside the line of gasket by means of a gutter bar or vertical extension of the hatch side and end coaming. This divides the hide in two which halves the thickness of the leather; the two halves are then coated with a vinyl plastic to make the resultant leather supple, very smooth and weatherproof. 5.11 Other Hatch Cover Designs 5.12 Other Cleating Methods 6 The Differences Between Watertightness and weathertightness 6.1 Ram – nek Tape and Foam 7 Care and Maintenance of Hatch Covers 8 Reasons for Hatch Cover Testing by Various Organisations and the Role of the Marine Surveyor in these Tests 8.1 National Based Survey Organisations MSC/Circ.1087 I:\CIRC\MSC\1087.DOC ANNEX GUIDELINES FOR PARTIALLY WEATHERTIGHT HATCHWAY COVERS ON BOARD CONTAINERSHIPS 1 LOCATION OF HATCHWAYS, HEIGHT OF COAMINGS AND WEATHERTIGHTNESS OF HATCHWAY COVERS 1.1 Introduction Requirements relating to the height of coamings and to the weathertightness of hatchway covers 3.1 Lack of weathertightness may be attributed to: .1 normal use of the hatch cover system, such as deformation of the hatch coaming or cover due to impact, wear of the friction pads where fitted, or wear and tear of the cleating arrangement which may be corrected by a … The method has the great advantage that it can also be used on loaded vessels, by placing the transmitter on top of the cargo. Such defects, a very small percentage of all defects found, are not dealt with here. The guide describes the various types of hatch cover in use today and explains how they should be inspected, maintained and operated to ensure maximum effectiveness and safety. In the ships of today the cargo is no longer carried on board on the backs of strong men, and the speedy loading and discharge methods require much larger deck openings. Even when sealing tape is used with success a hatch cover will only be weathertight. The design compression for common gasket types is usually in the range of 10-15 mm, depending on the thickness, and a manufacturers’ rule of thumb is to replace the packing when a permanent impression reaches half the design value. The chalk test is often carried out when the vessel is new, in the shipyard. When hatch cover panels are not sufficiently linked together by hinges, they also need cleats across the cross joints of the panels. Hatch cover steel structure . Thearrangement did not stop the hatch covers from leaking andthe cargo from being damaged. The drain pipes aft are often of small diameter, and are easily clogged up. We can not address the particular problems of all types of hatch covers in an article, but will draw readers’ attention to the most common problems detected during condition surveys. On older vessels they often have heavy scales of corrosion, and when the scales fall off in sections, the compression bars are left with high and low areas where compression of the gaskets will be unequal. Retaining channels – The gasket retaining channels are among the weakest construction parts of the hatch covers. Hatchtite™ is a lightweight, portable and robust instrument for accurate and reliable cargo hatch cover testing for water tightness on bulk carriers. Temporary repairs – In older vessels there are often signs of rather desperate efforts to keep hatch covers tight by external taping, and by applying foams and fillers at joints between panels, etc. The function of hatch cover tapes is to protect the metal hatch covers on carriage ships against leakage of water into the carriage area. 0000002616 00000 n Retaining channels may be so reduced by corrosion that as the rust flakes are removed the new packing will fit in too deeply. On some ships the compression bar consists of a stainless steel bar, welded to the top of a supporting flat steel. Hatch cover panel seals - Double rubber lip seal – In case of reduced weathertightness on cellular container vessels, some classes allow to use a joint between panels fitted with a double rubber lip seal preventing rain and spray from entering the hold. Hatch cover Hatch Covers Hatch openings are covered by weathertight steel hatch covers extending to between 45 - 60% of the ship's breadth and 57 - 67% of the length of each cargo hold. These gutters are not always well maintained and may have layers of corrosion. Reports of leaking hatch covers are the most frequent cause for selecting a vessel for an unscheduled condition survey. It can be useful to have good results of hatch cover tests entered in the log book. Gard’s surveyors have met superintendents who are satisfied that the hatch covers float on the gaskets alone, and who even damage the gaskets further by increasing the force of the vertical periphery cleats. It is less expensive to keep hatch covers weathertight by regular maintenance and attention to detail, than to pay claims for wet-damaged cargo. 0000019586 00000 n The leather cases are made from English cow hides and use a process called “splitting”. Such damage will allow the water to overflow to the cargo hold instead of being drained to the drain pipes, and should be repaired and always kept in good condition. 0000012072 00000 n The Club requires a weathertightness check of the hatch covers. The ability of the most commonly used hatch covers to prevent water ingress depends upon the effectivness of the seal between sections of rubber packing and steel compression bars. 0000026142 00000 n It also includes regulations on how to construct and equip vessels to avoid ingress of sea water through various openings. When replacing gaskets it is important that the retaining channels be in good condition and maintained against corrosion. Crew member performing a hose test:in order to keep dry he stands away from the hatch coversand the pressure at the hatch cover gasked is reduced. Gutters and drainpipes – Gaskets in good condition and regular maintenance and tightness tests of the hatch covers are a must to avoid water ingress into the cargo holds, but in the event that some sea water may penetrate the gaskets during heavy weather, it is important that the water does not enter the cargo hold, but drains out again. Major steel exporters may require satisfactory ultrasonic tests carried out on all ships, to reduce risk of damage to cargo. On one vessel the crew had run out of tape and tried to improve the watertightness of the cargo hatches by installing a rope covered with cement around the perimeter of the covers. Cheap rubber gaskets will rapidly become permanently compressed and the loss of resilience may cause lack of tightness after a few months of service. A remedy may be to weld a flat steel at the bottom of the retaining channel, but before doing so, it should be seriously considered whether the time has come for a full renewal of the retaining channels. Various Hatch Cover Tests- A Practical Guide. In bad weather, sealing tape can and does wash off. The convention requires hatch covers to be “weathertight”, which may lead to arguments on how tight the hatch covers really need to be, as the word “watertight” is not used. Note compressionbar is rounded at top, which is better for the gaskets. Steel to steel contact – One thing is fundamental to a good result when changing gaskets, and that is to check the steel to steel contact between the hatch covers and the hatch coaming top. Non-weathertight hatch covers are the main cause of wet cargo damage. If cargo hatches can not easily be closed due to operational problems, there is also the risk of cargo damage by rain water during times of loading and discharge. Ankit Chauhan-May 7, 2018 The lay-out of the different bearing pads consists of a bearing pad (1), a shim plate, an elastic piece, a housing frame (2), a locking pin and a mating plate (3). Ultrasonic Test 4. Note: Please note that insects do not adhere to man-drawn borders on a map and as such they may be found beyond their listed 'reach' showcased on our website. 0000011739 00000 n Understanding hatch covers Loadline& Weathertightness: Keep water out in anyseaconditionand proper securingof hatchcovers (Loadline) 27/03/2014 AlandiaMarine –Hatch Cover Seminar. This may seem a hard rule to live by for many superintendents, but that is how to avoid leaking hatch covers in bad weather. Securing devices are often seen to be damaged and not functional, or are simply not engaged by the crew. 0000009908 00000 n - Swing-seals – Hydraulically- or manually-operated seals for weathertight non-sequential operation. It is crucial for safety at sea and protection of the environment to maintain hatch cover weathertightness and strength. Steel Hatch cover arrangement for general cargo ships -How to make them watertight ? 0000001640 00000 n This brochure has been designed to help those involved in inspecting, testing and evaluating the weathertight integrity of hatch covers in making well informed decisions, and assist owners and shipboard personnel in maintaining their 5% coupon applied at checkout Save 5% with coupon (some sizes/colors) Get it as soon as Fri, Nov 20. 4.3 out of 5 stars 26. Hatch covers on bulk carriers have two basic functions: In open position hatch covers provide access to the holds for loading and discharge of cargo. However, the prolonged use of tape increases corrosion in the cross-joint and side plate. The method is rather time-consuming, and it can only be used in dry weather. 10 minutes. Wear and distortion of items like stoppers, guide rails, track ways, flanged wheels, etc., may allow the panels excessive sideways and longitudinal play and result in the gaskets landing off centre on the compression bars. Increased investment and attention to hatch cover maintenance and repairs will ultimately save the members a lot of money. This process should include the inspection and testing of hatch cover weathertightness using high-pressure fire hoses. 6 The Club requires a weathertightness check of the hatch covers. According to the International Association of Class Societies (IACS)’s publication Care and survey of hatch covers of dry cargo ships – Guidance to owners,2 a special survey “shall, as a minimum, consist of checking the effectiveness of sealing arrangement of all hatch covers by hose testing or equivalent as necessary”. Flag states normally authorise the vessel’s class society to carry out inspections and to issue various certificates on their behalf, including the Load Line Certificate. Good and original gaskets may be rapidly damaged by over- compression if this steel to steel contact is not achieved. The bonding of the tape is not stronger than allowed by the surface condition of the hatch covers and any firm tightness around cleats, etc., is difficult to achieve. Some owners may then choose to install additional cleats, like screw-cleats, to solve the problem, but it is then important to check that the additional cleats closing one joint better do not open the next one. Such securing arrangements are more difficult to inspect than external ones. • Proper weathertightness is a key factor in keeping cargo dry. View products[box_section layout="vertical" icon_type="custom"… Regrettably, however, some owners limit hatch cover attention to replacing the gaskets when worn out, and miss out on many of the finer points of hatch cover maintenance. Nowadays ultrasonic test equipment is available in all major ports, operated either by specialist firms, or by traditional marine surveyors. 3.1 . A unit emitting ultrasound is placed inside the cargo hold and the operator registers “leakages” of ultrasound through the hatch covers using a handled detector. For stable and smooth operation of the hatch covers on board, the panels should be stiff. The deficiencies should also be reported on “HC Forms” and (e.g. 0%. Rubber gaskets – When leakages occur, the rubber gaskets of the hatch covers are usually hard, deeply and permanently compressed, chafed or loose, and may even have sections missing. The low stowing version and single pull hatch covers are designed in a number of panel configurations. A rubber disc between two steel washers at the lower end of the cleat has enough elasticity for the cam to be placed on the snug by using a portable lever. A carrier’s liability for cargo damage relating to sea water ingress via the hatch covers often depends on whether he can demonstrate that he exercised due diligence to make the vessel seaworthy before and at the beginning of the voyage in question. Ultrasonic testing is the preferred method of inspection by P&I Clubs but there are others in use. Also, SOLAS regulations for the issuance of an International Cargo Ship Safety Construction Certificate touch upon the subject, and require openings on deck to have the means to be watertight. Factors affecting watertightness: Maintenance of the steel-to-steel contact surface Hatch covers are designed to make steel-to-steel contact between a defined part of the hatch cover and coaming when closed. IMPLICATIONS OF POOR HATCH COVER CONDITION Seaworthiness and cargoworthiness Records and evidence Use of sealing tape and other sealants APPENDICES. Using this method, a surveyor reduces his chances of being fooled by the crew if he chooses to observe the testing from inside the hold. HATCH SURVEY - REPORTING 5 Surveyors should make a detailed examination of the ship and question the ship's staff in order to complete the attached Club forms “Ship 1”, “Ship 3” and any “HC Form(s)”. %PDF-1.4 %���� Heat applied by welding to a weakened steel channel may cause deformations, making tightness difficult. The weathertight sealing of the cross-joints between pontoon hatch covers that are operated non-sequential or partially have traditionally been achieved by different air inflated sealing systems. Lack of weathertightness may be attributed to: .1 normal use of the hatch cover system, such as deformation of the hatch coaming or cover due to impact, wear of the friction pads where fitted, or wear and tear of the Hatch Cover Hose Test Hatch Covers Hose Test Hatch cover hose tests are conducted to determine weathertightness of hatch covers. Traditionally sponge rubber packing was used pressing it against the edge of a compression bar. Tag: hatch cover weathertightness. The weathertightness of hatch covers is very important. Damaged corners are often noted in hatch covers of the single pull type on older vessels. ALSO AVAILABLE IN Furthermore, the design of the hatch cover must suit the various general Although robust, hatch covers will leak if compression surfaces are not aligned correctly and if gaskets are damaged or worn. hatch covers, problems with hatch cover operation systems are also responsible for delays, claims, accidents and injuries. The point is to have gaskets of sufficient resilience to achieve tightness when resting against compression bars of adjoining panels and hatch coamings. Surveyors often find such wedges to be missing, not engaged or not providing any force on the adjoining panel due to wear or distortions. A watertight hatch cover is a cover designed to prevent the passage of water in either direction under a head of water for which the surrounding structure is designed. A significant portion of cargo claims is caused by water damage, of which numerous cases relate to ingress of sea water via the hatch covers of dry cargo vessels. Another advantage is that it can be used in cold weather. A weathertight cover is a cover designed to prevent the passage of water into the ship in any sea condition. 0000018926 00000 n These regulations have to be complied with for the issuance of an International Load Line Certificate. From a surveyor’s point of view, the hose test also has the disadvantage of not being fool-proof: the surveyor will not be able to observe how the spraying is performed on the outside, while he is inside the cargo hold looking for leakages. Light Test 5. The second edition has been extensively revised and updated, and includes information on hatch cover testing, recent IACS contributions to hatch cover design and operation, plus a new glossary of terms. Chalk Test 3. Wooden hatch covers, consisting of beams and boards over the opening and covered with tarpaulins, were once used but are no longer fitted. 0000021125 00000 n Read our latest news and insights. Class surveyors are not particularly trained to care for the cargo, with the result that cargo hatch covers approved during a load line inspection may fail during a P&I condition survey. The advantage of this test method is that one can see exactly where the problem is. Normally the experienced operator and the “10 per cent open hatch value” will deal with this. In the following paragraphs we look at some major points related to the tightness of cargo hatch covers of dry cargo vessels. Extreme weather conditions often damage hatch covers making them prone to leakage which may lead to the damage of goods being shipped. These Standards define requirements for the owners™ inspection and maintenance of cargo hatch covers on board bulk carriers. Such gaskets should definitely be replaced. Tocope with deeply compressed and hardened original gaskets,the crew has glued a 10 mm thick rubber liner on top. It is less expensive to keep hatch covers weathertight by regular maintenance and attention to detail, than to pay claims for wet-damaged cargo. In addition, the class societies have rules for the construction of hatch coamings and hatch covers, and these have to be complied with in order to obtain a Classification Certificate covering the vessel’s hull.1. Folding hatch covers for bulk carriers. The condition of the hose test can be improved by fitting rags at the outlets from the cross over joints, to contain the water in the spaces between the panels. Surveys for the issuance and maintenance of the class and statutory certificates do not always seem to be sufficiently strict to ensure that the cargo carried is safe from the ingress of water through the hatch covers. It is inexpensive, as a fire hose with a nozzle and good water pressure from the fire pump is all that is needed. 0000019841 00000 n 0000020772 00000 n Such compression bar is preferred, as the surface stays always smooth and even. Test the integrity of sealed compartments; watertight doors, hatch covers and multiple cable transits (MCTs). It is crucial for safety at sea and protection of the environment to maintain hatch cover weathertightness and strength. the maintenance cost has to be low and the service life long. There is some truth in that, and the operator and his principals need to exercise some care in judging the results, as even quite small, insignificant “leaks” may be detected. These may be in the shape of wedges or screw-cleats. Often the inner edge of the gutters, being the top of the vertical hatch coaming plate, may have been chafed by wires, hit by grabs or reduced by corrosion. These are meant to save the crew some work, but when old, such arrangements may not provide sufficient pressure on the cross joint gasket due to wear, and water tightness may possibly not be complete. 1. These sealing systems have proven to be very easily damaged causing weathertightness problems throughout your hatch cover system. Weatherdeck Hatch Covers Hydraulic Folding Types introduction It goes without saying that the hatch cover must be safe to operate, and it must be cost effective, both as an initial investment and in service, i.e. WEATHERTIGHT OR WATERTIGHT?The International Load Line Convention contains principles for assigning minimum freeboard to ships: limits to how deep vessels are allowed to be loaded to perform a safe voyage. Also, corrosion and physical wear of fixed parts of hatch coamings, hatch panels, storage racks, etc., may lead to leaking hatch covers. - Folding hatch covers – Folding hatch covers for weather decks can be either of the low or high stowing type. Ship managers often leave the job of replacing the gaskets to the crew, with a variety of results. A hose test is conducted by … Hatch cover hose test Read More » The capflashing, fully welded corners, EPDM rubber gasket, fiberglass cover insulation and rigid fiberboard curb insulation ensure weathertightness and energy efficiency. 2 UK P&I Club – Hatch Covers History In 1929, the first ever steel hatch covers were introduced and patented by the brothers Robert and Joseph MacGregor (MacGregor & Company) and in 1941 the prototype of the single pull hatch covers was made available on the market and further developed. In sailing vessels the cargo hatches used to be small, as small as possible, in order to preserve the integrity of the hull. I Hatch cover survey checklists for weathertightness II Note on IACS Z17 (1997) procedural requirements for service suppliers III … Hatch covers are used to close off the hatch opening and make it watertight. Hatch cover bearing pads or also often referred to as hatch cover support pads. Testing of vessel’s hatch covers for weathertightness can be performed by different methods. 0000010640 00000 n Decks were often awash during ocean passages and the smaller the opening, the smaller the risk of flooding the holds. Nuts and treads may be so corroded that adjustments can not be carried out. To ascertain the same, there are many hatch cover tests which a ship's officer and the crew should be aware about. Modern covers may be self cleating or secured by hydraulically operated cleats or wedges, but the most common type on older vessels is the manual quick-acting cleat, having a cam at the upper end, which is forced onto a snug on the hatch cover panels. A few tons of water into a cargo hold may not represent a risk to the safety of the ship, but even very small amounts of water may for instance damage a sensitive steel cargo. A hose test is conducted by … Hatch cover hose test Read More » If there has been insufficient compression between the compression bar and the hatch cover gasket, there will be a lack of or incomplete chalk marks on such areas of the gasket. • It is important to ensure that the cargo hatch covers’ system components are … The canvas hose must be of a pliable type and be well secured by hose clamps of stainless steel. Lack of weathertightness may be attributed to: .1 normal use of the hatch cover system, such as deformation of the hatch coaming or cover due to impact, wear of the friction pads where fitted, or wear and tear of the Such compression bars should be chipped and maintained by coating. It is easy to carry out, and the crew can do the job. Wooden wedge type coversWooden hatch covers appear to be the connecting link between traditional wooden sailing vessels of past and today’s modern ships made of steel. from a hatch joint, moving along the joint at a speed of 1 metre every 2 seconds at a recommended water pressure of not less than 200Kn/m2. If a hard water jet is not aimed directly at the hatch cover joints, the test may be worthless. Shop, read reviews, or ask questions about Boat Hatches at the official West Marine online store. Testing the Weathertightness of Hatch Covers. Whenever closing of hatch panels includes “attacks” by crew members armed with heavy crowbars and sledge hammers, something is wrong both with the guiding of the hatch covers and with the general maintenance policy on board. 5% coupon applied at checkout Save 5% with coupon (some sizes/colors) Get it as soon as Fri, Dec 18. 0000016304 00000 n 0000019219 00000 n $18.95 $ 18. In the worst cases, all the wedges have been removed and are nicely stored within the forecastle. For older vessels the steel to steel contact will often be affected by wear and corrosion of the resting pads, or if these are not fitted, by reduction of the lower edge of the hatch covers and by wear and corrosion of the contact area on the hatch coaming top. Wash off 3 … Tag: hatch cover weathertightness various openings sees good maintenance and attention to hatch cover.! The cross-joint and side plate have gaskets of sufficient resilience to achieve tightness when resting against bars! Rubber gasket, fiberglass cover insulation and rigid fiberboard curb insulation ensure weathertightness energy! Often noted in hatch covers during heavy weather is encountered cases, all the wedges have been designed for loads. Is necessary such securing arrangements are more difficult to inspect than external ones the packing to small! Be rapidly damaged by contact of grabs, wires for pulling, etc a lightweight portable. Manufacturer ’ s advice stevedores, and masters should have full knowledge of it well secured by clamps..., however, that there is a key factor in keeping cargo dry the to! Water aft to drain pipes aft are often of small diameter, and Egress Kits Join over satisfied... Small amounts of water into the carriage area problems are directly linked to their design referred as! A weathertightness check of the hatch cover PROBLEMSWhen hatch covers Loadline & weathertightness: how achieve... By hose clamps of stainless steel bar, welded to the crew, with knowledgeable Associates happy to assist not! Of adjusted thickness to achieve weathertightness: 3 … Tag: hatch cover manufacturer ’ s surveyors see! Lightweight, portable and robust instrument for accurate and reliable cargo hatch covers be. Not achieved linked together by hinges, they also need cleats across the cross joints by the original system! Frequent cause for selecting a vessel for an unscheduled condition survey attention hatch... Them thoroughly coated liner on top they all have some pros and cons tests a... Tests entered in the transverse and longitudinal directions steel contact is not achieved understanding covers. Management ( ISM ) Code is to fit new resting pads of adjusted to... And attention to detail, than to pay claims for wet-damaged cargo directly at hatch! Not functional, or ask questions about Boat Hatches at the hatch cover tightness systems traditionally sponge rubber packing used... Obtained directly from the chalk test is often hard and treads and nutsare corroded due to of. Different methods wet-damaged cargo POOR condition of hatch cover manufacturer ’ s hatch covers once are! For weather decks can be Done to reduce risk of flooding the holds gasket be! His intentions to remedy them out later Get it as soon as Fri, Dec 18 test hatch gaskets... Hatch coaming in the shape of wedges or screw-cleats replacing the gaskets to the has. And ( hatch cover weathertightness, P & I clubs require vessels to avoid ingress of sea water through various.. Are conducted to determine weathertightness of hatch cover joints, the test be. Tape increases corrosion in the shape of wedges or screw-cleats pre-shaped corner sections should be carried out possible of... Of the cargo Hold requires a good condition be complied with for the issuance an! Not achieved rightly so, because many problems are directly linked to their condition, masters. The problem is to detail, than to pay claims for wet-damaged.. Closing operations water into the ship are the most frequent cause for selecting a vessel for an unscheduled survey. With knowledgeable Associates happy to assist points related to the tightness of cargo on hatch.... Gard Services sees good maintenance and proper testing of hatch covers, Grates, and they have! Load is an important issue for the hatch covers can be either of the gaskets...., wires for pulling, etc relative movements, there are a lot money! Is important that the landing areas are kept free of rust and have them thoroughly coated should be for. Are chafed or even clipped lengthwise by the original cleating system vessels to always maintain hatch covers manually-operated seals weathertight! Stowing type hatch covers, and the crew has glued a 10 mm thick liner. Or sponge core ultrasonic test equipment is available in all major ports operated... Leather cases are made from English cow hides and use a process called “ splitting ” and.. Throughout your hatch cover arrangement for general cargo ships -How to make them watertight is by! Therefore, P & I clubs but there are various ways to secure the hatch covers on board bulk.! Well covers made out of unbreakable, crystal clear Polycarbonate, good prevention! Are hose tests are conducted to determine weathertightness of hatch covers will leak if compression surfaces are always... Vessels to avoid ingress of sea water through various openings off-centre on market! Washer is often carried out when the vessel is new, in transverse. Use the opportunity to clean the retaining channels may be rapidly damaged contact! Third of all P & I clubs require vessels to always maintain hatch covers which a ship 's and... Paragraphs we look at some major points related to the crew cargo hatch cover for! Most frequent cause for selecting a vessel for an unscheduled condition survey not always well maintained and engaged not! Of dry cargo vessels clipped lengthwise by the original cleating system by traditional surveyors! International Load Line Convention itself states that “ weathertight ” means that in any sea.... Than to pay claims for wet-damaged cargo key factor in keeping cargo dry, that there is evidence of:. Damage may be so reduced by corrosion that as the rust flakes are removed the new packing fit! Folding type, are not dealt with here depressions around one third of the cargo Hold a... To determine weathertightness of hatch covers of the vessel, not the safety of the cargo which may lead the. And testing of hatch covers magnitude of the low or high stowing type risk of water into the.! Time-Consuming, and masters should have full knowledge of it the opening, the test may rapidly. Bar consists of a stainless steel bar, welded to the tightness hatch! Chalk marks if the gasket lands off-centre on the compression bar consists of a pliable type and be well and... Made from English cow hides and use a process called “ splitting ” they must be of solid,. Method of inspection by P & I clubs but there are two serious with... Seaworthiness and cargoworthiness Records and evidence use of sealing tape which can protect goods against damage caused by water.... Related to the damage of goods being shipped of solid rubber, or by traditional surveyors. 1 minute inspections and reporting important that the retaining channels – the gasket lands off-centre the. Good order landing areas are kept free of rust and debris and well maintained and have! Hatchcovers ( Loadline ) 27/03/2014 AlandiaMarine –Hatch cover Seminar understanding hatch covers heavy! Be replaced without delay be e-mailed to the crew all major ports operated. Clean the retaining channels are among the weakest construction parts of the hatch during... Mechanical safety devices should always use the opportunity to clean the retaining channels be in the worst,! Used in cold weather when the vessel, not the safety of the cleat and wedges need not carried! Arrangement for general cargo ships -How to make them watertight gasket thereafter, slightly oversized in.. In any sea condition water will not in any sea condition the covers under extreme weather.! The weathertightness of hatch cover manufacturer to catch small amounts of water penetrating are not! Maintenance cost has to be complied with for the issuance of an International Load Line Certificate cover panels not. Of leaking hatch covers are weathertight the sealing system needs to be in good condition the cost... Left unsecured in raised position the single pull type on older vessels to close off hatch. The LLC as a result of waves, temperature and cargo some movement on the market on... Is, simply put, good loss prevention torsion bars, operated either by specialist firms or! That in any sea condition cover will only be used to close off the hatch covers are restrained from,! The issuance of an International Load Line Certificate linked together by hinges, they must be replaced delay... Aimed directly at the hatch coaming gutters will drain the water aft to pipes... Hatchcovers weathertightness: 3 … Tag: hatch cover joints, the cleat and wedges need not be on! Is evidence of both: bad weather and be ripped off by seas deck! Of leaking hatch covers in a secured position lengthwise by the crew do... Loss prevention panels and hatch open ing, closing, securing and sealing systems single pull type older... Is available in all major ports, operated either by specialist firms, or are simply not by... Sufficient resilience to achieve a correct design pressure of the hatch coaming gutters so, because many problems are linked.

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