GB 11578-1989 St. Lawrence Seaway landing boom
Some standard content:
National Standard of the People's Republic of China
Technical conditions for totally enclosed lifeboats
Specification for totally enclosed lifeboatsGB11573—89
This standard adopts the 1983 Amendment to the 1974 International Convention for the Safety of Life at Sea (SOLAS) of the International Maritime Organization (IMO), the IMO "Recommendations on the testing of lifesaving appliances" [Haida Resolution A. 521 (13)] and "Clarification of some provisions in the 1983 Amendment to SOLAS and Haida Resolution A. 521 (13)" (Haida Circular 444). 1 Subject content and scope of application
This standard specifies the technical requirements, test methods, inspection rules and markings for fiberglass fully enclosed lifeboats (hereinafter referred to as lifeboats). This standard applies to fully enclosed lifeboats for international and domestic ships and offshore oil platforms. This standard does not apply to free-fall fully enclosed lifeboats.
2 Reference standards
GB1446E
General test methods for properties of fiber reinforced plastics GB1447wwW.bzxz.Net
Test methods for tensile properties of glass fiber reinforced plastics GB1449
Test methods for bending properties of glass fiber reinforced plastics GB 1451
GB1462
GB 2408
Test methods for simply supported beam impact toughness of glass fiber reinforced plastics Test methods for water absorption of glass fiber reinforced plastics
Test methods for combustion properties of plastics
Horizontal combustion method
Basic environmental testing procedures for electrical and electronic products Test Ka: Salt spray test method GB 2423.171
GB 11574
Type and basic parameters of fully enclosed lifeboat
3 Terms
Fully loaded state
The state of the lifeboat after the engine is installed and loaded with a weight equal to the weight of its accessories and the approved passengers. b. Lightly loaded state
The state of the lifeboat after the engine is installed and loaded with a weight equal to the weight of its accessories. Technical requirements
4.1-General requirements
4.1.1 The type and basic parameters of the lifeboat shall comply with the provisions of GB11574. The lifeboat shall be manufactured according to the drawings reviewed and approved by the ship inspection department. 4.1.2
The allowable deviation of the basic parameters of the lifeboat is: boat weight
4.2 Stability and stability of the lifeboat
4.2.1 The shape and size proportion of the lifeboat should be such that it has sufficient stability and stability in the sea when fully loaded. Even if the waterline is damaged in any part, as long as the buoyancy material is not lost, it should maintain positive stability. 4.2.1.1 When 50% of the rated occupants are seated on one side of the centerline of the boat in a normal posture, the length of the boat should be at least 1.5% of the boat length. + The head should be measured from the waterline to the lowest opening where the boat may become flooded. 4.2.1.2 The stability of the lifeboat should be such that it can always right itself regardless of the angle of inclination when fully loaded or lightly loaded, with all openings closed and all occupants fastened with safety belts.
4.2.1.3 When any part of a lifeboat below the waterline is damaged, as long as the buoyancy material is not lost, even if it capsizes, it should be able to automatically locate itself in a position that provides passengers with an escape route above the waterline after the capsizing moment disappears. 4.3 Construction of lifeboat
4.3.1 The lifeboat should have a rigid hull and a top cover, and should be made of flame-retardant or non-flammable glass fiber reinforced plastic. 4.3.2 The lifeboat should have sufficient strength to enable it to: b. be safely landed in the water when fully loaded; c. be safely landed in the water and towed when the ship is moving at a speed of 5kn in semi-still water; c. be able to withstand a load twice the full weight of the boat, and have no significant residual deformation after the load is removed; d. be able to withstand a speed of at least 3.5m/s when fully loaded. The structure of the seats in the lifeboat should be sufficient to support 100kg occupants each. A safety belt should be provided at each seat to securely fasten a 100kg occupant to the seat when the lifeboat is in a capsized state. 4.3.3 The vertical height from the upper surface of the floor in the boat to the inner surface of the canopy should be not less than 1.7m for at least 50% of the floor area. 4.3.4 The lifeboat should be equipped with a rigid watertight top cover that can completely cover it. The arrangement should be: a. Doors and windows that can be closed and keep the lifeboat watertight are provided as the access to the lifeboat; b. The occupants in the boat should be able to launch and recover the lifeboat without leaving the enclosed area. operation; c. The doors and windows used as passages can be opened and closed from both inside and outside the boat, and should be watertight, and there should be facilities to keep them in the open position reliably.
d. The lifeboat should be able to be rowed.
e. The lifeboat with closed doors and windows should not have obvious water leakage when it is in the capsized position, and can support the total mass of all the accessories, machinery and rated passengers of the lifeboat:
f. The top cover should be equipped with light-transmitting windows. When the doors and windows are all closed, no artificial lighting is required during the day. g. The outside of the top cover should be a bright and visible orange-red, and the color of the inside should not make the passengers feel uncomfortable; h. The railing facilities should provide reliable handrails for people walking outside the boat and help boarding and leaving the boat; i. The boarding personnel can reach the entrance without crossing the thwart or other obstacles. to the seats; j. The passengers should be protected from the dangerous negative pressure that may be caused by the lifeboat engine. 4. Crew quota of lifeboat
The crew quota of lifeboat should be determined in accordance with the following principles: the seating arrangement can enable the passengers with an average mass of 75kg and all wearing life jackets to sit in a normal posture without affecting the operation of the propulsion device or lifeboat accessories. 4.5 Lifeboat access
4.5.1 The lifeboats equipped on passenger ships should be arranged so that all passengers can board and leave the boat quickly. 4.5.2 The lifeboats equipped on cargo ships should be arranged so that all passengers can board within 3 minutes from the issuance of the boarding order, and they should also be able to leave the boat quickly.
4.5.3 The lifeboat should be equipped with a boarding ladder that can be used at any side of the lifeboat to facilitate people in the water to board the boat. The vertical distance of the lowest step of the ladder below the light load waterline of the lifeboat should be not less than 0.4m. 4.5.4 The lifeboat shall be arranged so that persons who have lost the ability to help themselves can be carried into the boat from the sea or on a stretcher. 4.5.5 All surfaces on which persons may walk shall have an anti-slip layer. 4.6 Buoyancy of lifeboat
The lifeboat shall be provided with inherent buoyancy materials which are not affected by seawater, oil or petroleum products, and which shall be sufficient to float the lifeboat with all the accessories on the water surface in the event of a leak. For each rated occupant, an additional inherent buoyancy material of 280N buoyancy shall be provided. 4.7 Propulsion device of lifeboat
4.7.1 The lifeboat shall use a closed-circuit water-cooled compression ignition engine approved by ship inspection. 4.7.2 The engine cover, thwart plate or other obstacles shall not hinder the operation of the engine starting device. 4.7.3 The propeller shaft system shall be arranged so that the propeller can be disconnected from the engine. The lifeboat shall be provided with forward and reverse gears. 4.7.4 The arrangement of the engine exhaust pipe shall prevent water from entering the engine when it is in normal operation. The engine exhaust pipe, air pipe and other openings shall prevent seawater from entering the lifeboat when it capsizes and is righted. 4.7.5 The lifeboat propulsion system must be equipped with protective facilities to ensure the safety of people in the water and prevent floating objects from damaging the propulsion system. 4.7.6 The forward speed of a fully loaded lifeboat in calm waters shall be at least 6kn when all engine-driven auxiliary equipment is in operation; and when it is towing a 25-person liferaft with all passengers and accessories or of equal mass, the forward speed in calm waters shall be at least 2kn. Fuel suitable for the temperature range of the ship's expected navigation area shall be provided and sufficient for the fully loaded lifeboat to sail at a speed of 6kn for not less than 24 hours.
4.7.7 The lifeboat engine, transmission and engine accessories shall be equipped with a flame-retardant casing or other facilities that can provide similar protection. These facilities should also be able to protect personnel from accidental contact with hot and rotating parts, and suitable devices should be installed to reduce noise. The starting battery should be equipped with a battery box that can form a watertight wall on the bottom and around the battery. The battery box should also be equipped with a top cover that is tightly assembled but can be vented. 4.7.8 All batteries used for engine starting devices, lighting and searchlights should be equipped with charging equipment and can obtain power supply with a voltage not exceeding 55V from the mother ship. The power supply can be disconnected from the boat at the embarkation position of the boat. 4.7.9 The engine and transmission shall be centrally controlled at the driving position. Waterproof instructions for starting and operating the engine shall be posted in a conspicuous position near the engine starting control equipment.
4.7.10 The engine and its equipment shall either be able to operate at any position during the lifeboat capsizing process and continue to operate after the lifeboat returns to the upright position; or it shall be able to automatically stop when the lifeboat capsizes and be easy to restart after returning to the upright position. Fuel shall not be lost during the lifeboat capsizing process. The loss of lubricating oil shall not exceed 250mL. 4.8 Lifeboat sacrificial parts
4.8.1 At least one drain valve shall be installed near the lowest point in the lifeboat. When the lifeboat leaves the water, the valve can automatically open to allow water to drain from the boat, and when the lifeboat is filled with water, it can automatically close to prevent seawater from entering. Each drain valve shall be equipped with a cap or plug that can be closed and fastened to the lifeboat by a short rope, chain or other durable and suitable means. The drain valve should be located in an easily accessible place in the boat and its position should be clearly marked.
4.8.2 The lifeboat should be equipped with a rudder (or a rotatable guide tube) and a tiller that meet the following requirements: a. When the remote control steering (or guide tube) device fails, the rudder blade (or guide tube) can still be controlled by the tiller. b. The tiller should be permanently installed on the rudder stock. When a remote control steering device is provided, the tiller can be detachable and should be securely stored near the rudder stock at ordinary times.
C. The arrangement of the rudder and the tiller should not be damaged by operating the release mechanism or the operation of the propeller. 4.8.3 Except for the area near the propeller, a circular buoyant lifeline should be installed along the outside of the lifeboat. 4.8.4 The lifeboat should be equipped with a watertight cabinet or compartment with sufficient capacity to store the accessories suitable for storage in Article 4.9. Containers for storing collected rainwater should be available.
4.8.5 The lifeboat shall be provided with a hook release device that meets the following requirements: a. The device shall be able to release the hooks simultaneously under any load condition, i.e. from no load when the lifeboat is floating on the water to a load of 1.1 times the full weight of the boat.
b. The device shall be able to release the hooks of the lowered lifeboats simultaneously when the ship is moving forward at a speed of 5kn. c. The device shall be provided with protective facilities to prevent accidental use. The control handle of the release device shall be clearly marked and its color shall be clearly distinguished from the surrounding seal.
d. The device shall be designed with a safety factor of 6 based on the strength limit of the selected material and assume that the two hooks bear the weight of the boat equally. e. The hook assembly shall have sufficient corrosion resistance. 4.8.6 The lifeboat shall be provided with a cable release mechanism that can easily release the cable in a taut state at any position not hindered by the closed top cover.
GB 11573-89
4.8.7 Lifeboats should be provided with permanent grounding connections for radio equipment and facilities to place and secure the antenna in a suitable working position.
4.8.8 Lifeboats should be provided with necessary skids and guards to facilitate their landing and prevent damage. There should also be facilities for securing the lifeboats when they are stowed.
4.8.9 An approved position indicator light should be installed on the top cover of the lifeboat. One or more lighting lamps should be installed inside the boat. 4.8.10 The arrangement of the lifeboat should provide a suitable field of vision to the surroundings from its control and steering positions to facilitate the safe launching and operation of the lifeboat.
4.8.11 For lifeboats with an air maintenance system, the arrangement of the air maintenance system should ensure that the boat maintains a safe environment suitable for the survival of personnel when all its openings are closed and the engine is running normally for at least 10 minutes. During this period, the ambient pressure inside the boat should not be lower than the external atmospheric pressure, nor should it exceed the atmospheric pressure outside the boat by 2000Pa. The system should be equipped with an instrument that can always indicate the pressure of the gas source. 4.8.12 The design of the fire-resistant fully enclosed lifeboat should enable it to provide protection for the rated occupants inside the boat when it is surrounded by a continuous oil fire for not less than 8 minutes on the water surface. Its fire sprinkler system should meet the following requirements: The sprinkler water flow from the engine-driven self-priming pump to the outer surface of the boat should be able to be opened and closed; a.
The arrangement of the seawater intake should prevent the inhalation of flammable liquids from the sea surface, h.
The system should be arranged so that it can be flushed with fresh water and completely drained. c.
4.9 Lifeboat accessories (according to Table 1) No.
Safety belt for personnel
Floating water spirit
Taipei
Boat compass
Life-saving buoy
Water measuring cup
Parachute flame signal
Hand-held flame signal
Floating smoke signal
Daylight signal mirror
Waterproof flashlight
Deputy/person
Copy/person
Basic requirements
Attached to the boat with a chain
Short handle single-sided port, one at the head and tail
Fixed at the steering position
Length not less than 37m
Each portion of F ration has a calorific value of 10MJ, dense Package
Stored in a watertight dry food box
Stainless material
Stainless material
Watertight packaging
Watertight packaging
Watertight packaging
Connect spare battery-secondary and spare light
Bubble one, packed in a waterproof container
Sailor's knife
Illustrated explanation table of life-saving signals
Life-saving manual
Fishing tackle
First aid kit
Anti-seasickness medicine
Cleaning bag
Can opener
Hand pump
Machine repair tools
Fire extinguisher
Searchlight
Radar reflector
Small fender
GB 11573-89
Continued Table 1
Piece/person
Piece/person
Basic requirements
Attached to the boat with a short rope
Comply with SOLAS Chapter 5, Regulation
6Printed on waterproof paper
Printed on waterproof paper or watertight packaging
Suitable for extinguishing oil fire
Note: ① If the competent authority considers that some accessories are unnecessary in consideration of the route conditions and sailing time frequently engaged by the ship, it may allow less or no accessories. ② All accessories should be properly placed in the boat and fixed as necessary, but the boat parts and the fire axe should be near the entrance of the boat for easy access. 5 Test methods
5.1 Strength test
5.1.1 The fully loaded lifeboat is towed horizontally in calm waters at a speed of 5 kn through its cable release mechanism. The hull strength should be able to withstand the resulting towing force FH.
The horizontal towing force FH at a speed of 5 kn should be measured during towing. For the strength assessment of the lifeboat when it is lowered at a speed of 5 kn, see 5.5.3 and 5.5.4. 5.1.2 Overload test
5.1.2.1 The overload test should be carried out on the basis of the lifeboat being fully loaded, that is, with the approved passengers (each person is 75 kg) and accessories, and with 25%, 50%, 75% and 100% of the fully loaded boat weight added in turn. The weight configuration should be basically consistent with the actual use status of the boat, but the height of the center of gravity of the passenger weight does not need to be considered. 5.1.2.2
For the overload weight increased by percentage, in principle, it should be distributed at the corresponding position of the corresponding items. The weight of accessories and passengers is allowed to be replaced by substitute weights, but water injection is not allowed. The machine parts that may be damaged during the test should be removed and compensated by substitute weights. The following measurements are recorded under full load, 25%, 50%, 75% and 100% overload: 5.1.2. 4
Sagging value at keel in the boat
Change in boat length between the top of the burst column,
Change in boat width between the edge of the boat and the middle of the boat at 1
1 boat length away from the collapse roller: Change in the molded depth from the side to the keel.
5.1.2.5 When the lifeboat is subjected to 25% overload, the deformation of the keel and the boat width measured at the above-mentioned parts shall not exceed 1/400 of the boat length; the deformation of the keel and the boat width measured at 100% overload shall be roughly proportional to that measured at 25% overload. For example: if the deformation of the keel or the boat width at 25% overload is 16mm, it should be about 25mm at 100% overload (16×200/125=25). 570
Standard Search Ai Network Research
Free Download of Various Standards Industry Information
GB11573—89
5.1.2.6 After unloading the weight, there shall be no significant residual deformation at the above-mentioned measuring parts after an appropriate delay (about 18h). The permanent deformation of the boat shall be recorded at the end of the test.
5.1.3 Collision test
5.1.3.1 The collision test should be carried out with the lifeboat equipped with the engine and fully loaded. The boat slide can be installed. The weight of the accessories and passengers can be replaced by heavy objects. The weight of the passengers is 2/3 on the seat plate and distributed on the bottom of the boat.
5.1.3.2 The fully loaded lifeboat is suspended freely, and then pulled transversely to a position 0.625m higher than the free suspension position, so that it can collide with a fixed rigid vertical plane at a speed of 3.5m/s after release. 5.1.3.8 The acceleration value measured on the boat structure at the seat height on the collision side should not exceed: 189 in the back direction of the passengers,
b. 189 in the front direction of the passengers,
7 9 in the side direction of the passengers.
5.1.3.4 After the collision, there should be no damage that affects its effectiveness, that is, the engine can start normally, the sun hook can be unhooked synchronously, the lifeboat can sail normally, the sprinkler system can work normally, the air supply system can supply air normally, and there are no serious cracks that damage the integrity of the hull structure.
5.1.4 Drop test
5.1.4.1 The lifeboat to be dropped shall be loaded in accordance with 5.1.3.1. 5.1.4.2 The lifeboat shall be suspended above the water surface so that the vertical distance from the lowest point of the lifeboat to the water surface is 3m, and then the lifeboat shall be released to fall freely into the water.
5.1.4.3 According to the provisions of 5.1.3.4, the lifeboat shall not suffer damage that will affect its effectiveness after falling. 5.1.5 The passenger seats shall be subjected to strength test. A weight of 100kg shall be placed on each passenger seat for 5 minutes. After the load is removed, there shall be no permanent deformation or damage.
5.2 Material test
5.2.1 The fiberglass material of the hull and engine cover shall be subjected to flame retardant performance test according to GB2408. The results shall comply with the provisions of GB2408 Class II.
5.2.2 The mechanical properties of the fiberglass laminate used as the hull shall comply with the requirements of Table 2, and the relevant physical and mechanical properties shall be tested in accordance with GB1446, GB1447, GB 1449, GB1451 and GB1462. Table 2
Glass content
Tensile strength
Flexural strength
Flexural modulus of elasticity
Impact value
Water absorption
5.2.3 Performance test of lifeboat buoyancy material
Positive living equipment
Glass cloth
>10 000
Glass felt
GB 11573-89
5.2.3.1 Stability test under temperature cycle a. Six specimens with dimensions of 200 mm × 25 mm × 10 mm (± 1 mm) are subjected to ambient temperatures of ~30°C and 65°C alternately for 8 hours. However, each alternating cycle does not need to be followed by another. Ten cycles can be repeated according to the following procedure: On the first day, a high temperature process of 8 hours and 65°C is completed. On the same day, each specimen is taken out of the hot room and left open at room temperature until the next day. On the second day, a low temperature process of 8 hours and -30°C is completed. On the same day, each specimen is taken out of the cold room and left open at room temperature until the next day. b. After the 10 cycles, the dimensions of each specimen are recorded. After careful inspection, there should be no signs of any structural changes. Two of the specimens should also be cut open for inspection. There should also be no signs of any structural changes inside. 5.2.3.2 High-octane gasoline test
The two samples after the high and low temperature test are horizontally immersed in high-octane gasoline (octane number not less than 87) with a pressure head of 100mm at room temperature for 24 hours. After the test, the samples should have no signs of shrinkage, cracking, swelling, decomposition, etc., and no changes in mechanical properties. 5.2.3.3 Water absorption test
a. Take 2 untested samples, 2 samples after the temperature cycle test, and 2 samples after the temperature cycle test and high-octane gasoline test.
b. The dimensions of each sample should be recorded before and after the test; c. Immerse the above samples in fresh water with a water pressure head of 1.25m, and measure the weight that each sample can support in water after 24 hours and 168 hours respectively;
d. The reduction in buoyancy shall not exceed 5%. The samples should have no signs of shrinkage, cracking, swelling, decomposition, etc., and no changes in mechanical properties. 5.2.3.4 Test for petroleum products
a. Take 10 samples with the size of 200mm×25mm×10mm (±1mm), b. Take 2 samples as a group and immerse them in crude oil, fuel oil, diesel, high-octane gasoline and kerosene at room temperature for 336 hours at a depth of 100mm, and then measure the weight that each sample can support in water. The reduction of buoyancy shall not exceed 5%, c. After the test, measure the size of each sample, and there shall be no signs of shrinkage, cracking, swelling, decomposition, etc., and no change in mechanical properties. 5.2.4 Hook components, door and window handles, safety belt buckles, etc. shall be subjected to a 168h salt spray test in accordance with GB2423.17. After the restoration treatment as required, check the flexibility of these components. 5.3 Stability test and dry measurement
5.3.1 It shall be confirmed through tests that the lifeboat still has positive stability when the hull is damaged and connected to the sea. The loading conditions of the boat during the test are the same as those in 5.1.3.1, but the weight of the passengers is calculated as 280N per person in consideration of the buoyancy generated by water ingress, and the center of gravity is still 300mm above the seat surface. Electrical equipment that may cause damage can be removed and replaced by equal weights. Then, water is allowed to enter the boat, and when the water surfaces inside and outside are level, the boat should not capsize if people stand on the side of the boat.
5.3.2 Load the lifeboat with the engine installed with a mass equal to all its accessories, and half of the approved passengers sit on one side of the boat in the specified positions. Then, measure the dry slant value from the water surface to the lower edge of the door on the lower side of the boat. This value should not be less than 1.5% of the length of the boat. 5.3.3 The lifeboat should be tested for self-righting in full and light load conditions. When conducting the self-righting test in the fully loaded state, the accessories or their substitute weights should be fixed in the corresponding positions, and a weight equal to the mass of the occupants (75 kg per person) should be fixed at each seat, with the center of gravity kept 300 mm above the seat surface. The self-righting test in the unloaded state is arranged in the same way as the fully loaded state, except that the mass of the occupants is not taken into account. At the beginning of the test, the engine should be started and allowed to run at idle. Then, try to gradually turn the closed (except the ventilator) lifeboat to 180° to make it capsized. After it stabilizes, release it, and the lifeboat should be able to automatically return to the upright floating position. After reaching the upright floating position, the engine should continue to run for at least 10 minutes.
5.3.4 Fill the lightly loaded lifeboat with water until the inner and outer water surfaces are flush. Then, open all openings and try to slowly turn the boat around its longitudinal axis 180° to make it capsized. After stabilization, release it. The lifeboat should be able to automatically position itself to provide an escape hatch above the waterline for passengers. Among them, the accessories can be replaced by equivalent weights and roughly arranged at the corresponding positions. Appropriate measures should be taken to prevent water from entering the engine or remove it and replace it with equivalent weights. Electrical equipment that may cause damage can be removed and compensated by equivalent weights.
5.4 Seating test
GB 11573-89
5.4.1 After the lifeboat is equipped with the engine, accessories and other necessary equipment, allow the approved passengers on the boat with an average mass of about 75kg and all wearing life jackets to board the lifeboat and sit at the specified position. The boarding should be completed within 3 minutes, and then the lifeboat should be operated, and the accessories should be tried to confirm that they are not difficult to use or do not hinder passengers. 5.4.2 Personnel who have lost the ability to help themselves should be carried into the boat on a stretcher. 5.4.3 Check the surface of each row, which is provided with an anti-slip layer. 5.5 Release mechanism test
5.5.1 The release mechanism is mounted on a tensile strength test device and the load is gradually increased to 6 times the working load of the mechanism without failure. 5.5.2 The lifeboat with the engine installed and loaded to 1.1 times the full boat weight is lifted by the boat hook and just out of the water. The rolling hooks are to be released simultaneously by operating the release mechanism. It is to be confirmed that when the lifeboat is completely floating on the water, the rolling hooks can also be released simultaneously by operating the release mechanism. 5.5.3 It is to be confirmed by the following test that when the fully loaded lifeboat is lowered and towed by the ship at a speed of 5 kn, the release mechanism can release the hooks simultaneously by operating the release mechanism. 5.5.3.1 In the direction of the boat length, the ship's boat rope is inclined at 45° to the vertical and a force is applied to each rope that is a function of the following relationship with the towing force FH (see 5.1.1).
F = 0.707 FH
Then, the sun hooks should be released simultaneously by operating the release mechanism. This test is performed once in the forward and aft directions. (1
5.5.3.2 In the boat width direction, make the ship's lifting ropes form an angle of 20° with the vertical and bear the full boat weight together. Then, the sun hooks should be released simultaneously by operating the release mechanism.
5.5.3.3 Make the ship's lifting ropes be in the position determined by 5.5.3.1 and 5.5.3.2. At the position corresponding to the midpoint of the arc of the quarter ellipse determined by the two positions of the boat rope (Figure 1), the boat rope is inclined at 26° to the vertical in the direction of the boat length and 16° to the vertical in the direction of the boat width, and a force equal to the radius value corresponding to the midpoint of the arc length of the quarter ellipse shown in Figure 2 is applied respectively. The minor semi-axis of the ellipse is FH/2 and the major semi-axis is W (W is the fully loaded boat weight). Then, the hooks should be released simultaneously by operating the release mechanism. 2
B (strong midpoint)
Figure 1 Ellipse for determining the position of the boat rope
Lower reduction
GB11573--89
A (midpoint)
Figure 2 Ellipse for determining the force on the boat rope
This test should be carried out once at each of the four positions A, B, C and D of the ellipse shown in Figure 1. 5.5.4 The following tests shall be conducted to verify that the release mechanism of the lifeboat can release the lifeboat cable smoothly when the lifeboat is fully loaded and towed at a speed of 5 kn.
5.5.4.1 The lifeboat cable release test shall be conducted at several representative positions in the upper hemisphere without obstruction by the canopy or other structures of the lifeboat, i.e. the elevation angles of the lifeboat cable projection in the longitudinal midplane are 20°, 40° and 60° respectively, and the angles between the projection and the centerline of the lifeboat in the horizontal plane are 15°, 30° and 45° respectively, for a total of nine positions. 5.5.4.2 During the test, the force on the lifeboat cable shall be a function of the fully loaded lifeboat weight W and the towing force FH at a speed of 5 kn, i.e. a quarter ellipse is constructed with W as the major axis and FH as the minor semi-axis (see Figure 3). Then, rays are constructed at elevation angles of 20°, 40° and 60° with the X-axis, respectively, to obtain F. , F. and F. . Considering that the projection of the boat cable on the horizontal plane has an angle of 15°, 30° and 45° with the boat centerline respectively, the tension borne by the boat cable at the above nine positions should be: see formula (2), formula (3) and formula (4). When the elevation angle is 20° with the X-axis: fa = Fa / cos15°
fb = Fa / cos30°
fe = Fa / cos45°
When the elevation angle is 40° with the axis:
fa =Fb / cos15°
fe= Fb /cos30°
ft = Fb / cos45°
When the elevation angle is 60° with the X-axis:
Lower live assembly
(3)
GB 11573-89
fg = Fc / cos15°
fh = Fc / cos30°
fi = Fe / cos45 °
Figure 3 Determine the ellipse of the force on the boat rope
5.5.4.3 By operating the release mechanism, the boat ropes at the above positions should be able to be released smoothly. 5.6 Lifeboat operation test
(4)
5.6.1 The lifeboat should be tested for at least 4 hours under full load to prove that its engine is running well and the boat is flexible. 5.6.2 The test should prove that the lifeboat can tow a 25-person liferaft with the approved passengers and accessories at a speed of not less than 2kn. 5.6.3 The fuel consumption of the lifeboat should be measured when it is sailing at a speed of not less than 6kn to prove that the fuel tank has enough fuel to store for continuous sailing for 24 hours.
5.6.4 The speed of the lifeboat in still water should be measured, and the value should not be less than 6kn. 5.7 Watertightness test
All openings and joints of the lifeboat should be tested for watertightness. Use a 16mm diameter water pipe, flush water at a pressure of 0.1MPa, at a distance of 3m, aiming at the opening or joint, and there should be no obvious dripping on the other side. 5.8 Air source test
Lifeboats with air maintenance systems should be tested for air source. 5.8.1 Close all openings of the lifeboat, put the air source system into the air supply, and run the engine at full speed for 10 minutes. During this period, continuously measure the ambient pressure in the boat to confirm that the boat always maintains a positive air pressure of no more than 2000Pa. 5.8.2 It should be confirmed through the test that during the normal air supply of the air source system, even if the engine suddenly stops, the air source system can control the ambient pressure in the boat to no more than 2000Pa.
5.8.3 It should be confirmed through the test that when the air source is exhausted, the air source system can automatically take measures to prevent the generation of dangerous negative air pressure in the boat. 5.9 Fire resistance test
Fire-resistant fully enclosed lifeboats should be tested for fire resistance. 5.9.1 Sprinkler test
5.9.1.1 Sprinkler fire protection system effectiveness test
Start the engine and sprinkler pump, make the engine run at the rated speed, measure the engine and water pump revolutions per minute and the pressure at the suction end and the discharge end of the water pump to obtain the rated values of the speed and pressure. 5.9.1.2 Tilt sprinkler test
GB 11573-89
Make the lifeboat in a fully loaded state have a tilt, trim and left and right tilt with an amplitude of 5 in sequence. In each case, run the water pump at the rated speed and measure the pressure at the suction end and the discharge end. The pressure measured in each case should be basically stable. At the same time, observe the water sprinkling situation, and the water film should be able to cover the entire outer surface of the hull. 5.9.1.3 Make the lifeboat float upright and at the same draft, operate the water pump at rated speed, and measure the water film thickness at some representative parts of the outer surface of the lifeboat under full load and light load conditions. The value should be not less than 0.6mm. 5.2 Fire test
5.9.2.1 Make the lifeboat anchor in the center of a pool of water not less than 5 times its maximum horizontal projection area, pour a sufficient amount of kerosene into the pool and the pool boundary should be able to completely surround the fuel. 5.2.2 Make the engine run at full speed, but there is no need to drive the propeller. The gas source and fire protection system should always be functional during the entire fire test. 5.2.8 Ignite the kerosene and allow it to burn continuously and surround the lifeboat for 8 minutes. 5.9.2.4 The temperature at not less than 10 positions on the inner surface of the boat and at not less than 5 positions in the boat that will be occupied by passengers should be recorded. The method for measuring the temperature should be able to record the highest temperature. The highest temperature measured in the boat should not exceed 60℃. 5.9.&.5 The temperature of the outer surface of the lifeboat and the flame should be recorded. 5.9.2.6 The gas in the lifeboat should be sampled continuously, and the representative gas samples collected should be analyzed to confirm the presence and quantity of toxic and harmful gases or substances. The analytical method adopted should be able to analyze all gases that may be expected to be released by substances that may be generated and may also cause changes based on the materials used and the manufacturing process. 5.9.2.7 The pressure in the lifeboat should be measured continuously to confirm that the positive air pressure in the lifeboat is always maintained at not more than 2000Pa. 5.9.2.8 After the test, the lifeboat should be able to continue to be used in a fully loaded state. 5.9.2. For any lifeboat with the same structure as the lifeboat that has successfully passed the fire test, if the boat only differs in size and remains essentially the same form, this test may be omitted with the consent of the competent authority. However, its fire protection system shall be as effective as that of the tested lifeboat; its water transmission rate and the water film thickness at all locations around the hull and top cover shall be equal to or exceed the values measured on the lifeboat subjected to the first fire test.
6 Inspection rules
6.1 Type inspection
6.1.1 The first production lifeboat of different types and specifications shall be subjected to prototype tests including all items in Chapter 5 (Test methods), and the results shall comply with the relevant provisions.
6.1.2 In addition to the tests described in 6.1.1, the following inspections shall be carried out: 6.1.2.1 A comprehensive inspection of the lifeboat fittings shall be carried out in accordance with Article 4.8 to confirm whether they are fully equipped and whether the installation complies with the requirements. 6.1.2.2 A comprehensive inspection of the lifeboat accessories shall be carried out in accordance with Article 4.9 to confirm whether they are fully equipped and whether the storage complies with the requirements. 6.1.2.8 The markings of lifeboats shall be comprehensively checked in accordance with the provisions of Chapter 7 to verify the integrity and correctness of the markings. 6.1.2.4 The release device of the boat hook shall be properly installed and locked. The engagement clearance of the stop block shall be measured and its value shall not exceed 5mm. 6.2 Factory inspection
6.2.1 The following inspections shall be carried out for each newly manufactured subsequent boat manufactured in a factory approved by the ship inspection department and has passed the prototype test. 6.2.1.1 The lifeboat shall be loaded to a weight equivalent to 1.1 times the full boat weight and lifted by the boat hook. Then, the sun hook and sun hook shall be released simultaneously by operating the release mechanism.
It shall also be verified that when the lifeboat is completely floating on the water under light load and 1.1 times the full boat weight, the lying hook and rolling hook can be released simultaneously by operating the release mechanism.
6.2.1.2 Before loading the lifeboat on board, a sea trial of at least 2 hours should be carried out to verify that its manufacturing and installation quality is the best, including that the steering, engine operation (including reverse and forward), water spraying and air supply can be put into normal use. 6.2.2 The lifeboat should also be subject to the various inspections specified in 6.1.2. 7 Marking
7.1. Simple and clear signs or instructions should be placed on the parts of the lifeboat that require opening and closing, operation and attention. The text part should be in both Chinese and English. The storage location of important accessories such as fresh water, rations, signals, etc. should be marked. 7.2. The location of each seat should be clearly marked on the seat board. All parts of the outer surface of the lifeboat that are helpful for detection should have a bright and easy-to-see orange-red color. 7.4. Retro-reflective materials should be attached to the outer surface of the lifeboat in accordance with IMO Resolution A.274 (). A nameplate should be installed at an appropriate position in the boat, on which at least the following information should be marked: 7.6. Manufacturer's name, product name; product model, manufacturing date, main product parameters; name of the approval authority.
The size and crew quota of the lifeboat shall be marked on both sides of the outer surface with permanent characters not less than 38mm in height. The name and number of the ship to which the lifeboat belongs shall be written in permanent characters not less than 76mm in height on the left and right sides of the lifeboat. The port of registry shall be written on the left and right sides of the lifeboat, and the Chinese pinyin shall be added under the ship name and port of registry. Additional notes:
This standard was proposed by China State Shipbuilding Corporation. This standard was supervised by Guangzhou Shipyard.
This standard was drafted by the 704th Institute of China State Shipbuilding Corporation. The main drafter of this standard is Huang Mengnan.
Standard Search Network
Free download of various standard industry information
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.