Some standard content:
Shipbuilding Industry Standard of the People's Republic of China
CB 3593—94
Technical Specifications for Inflatable Liferafts
Published on February 1, 1994
China State Shipbuilding Corporation
Implemented on August 1, 1994
Shipbuilding Industry Standard of the People's Republic of China
Technical Specifications for Inflatable Liferafts
CB3593—94
Classification Number: U27
This standard mainly refers to the 1983 Amendments to the 1974 International Convention for the Safety of Life at Sea and the Test of Life-saving Appliances [Resolution A.689(17) of the International Maritime Organization (IMO). Subject Content and Scope of Application
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of inflatable liferafts. This standard applies to the throwable inflatable life raft and the suspendable inflatable life raft used in international and domestic voyages. 2 Terminology
2.1 Throwable inflatable life raft
Inflatable life raft thrown into the water from the side by manpower or by means of a raft frame. 2.2 Suspensionable inflatable life raft
Inflatable life raft that is inflated and formed and then lowered into the water by a raft frame in its fully loaded state, referred to as a suspending raft. 2.3 Storage cylinder
A rigid container for storing inflatable life rafts.
It serves as a connection between the life raft and the ship and can pull the rope of the cylinder valve starter. 2.5 Full load state
The state of the life raft after it is fully loaded with the rated passengers and all accessories. 2.6 Inflatable life raft
The inflatable life raft is inflated until the buoyancy is round and the canopy is erected and ready for use. 3 Technical requirements
3.1 General requirements
3.1.1 The appearance of the lifeboat should be uniform and the color should be even. There should be no defects such as debonding, delamination, bubbles, etc. that affect its use. The main dimensions should meet the requirements of the design drawings.
3.1.2 The liferaft should be able to be stored at an ambient temperature of -30 to +65℃ without being damaged. 3.1.3 The lifeboat should be able to be used in the seawater temperature range of -1 to +30℃. 3.1.4 The total weight of the portable lifeboat (including the storage tube) should not exceed 185kg. 3.1.5 The fully packaged lifeboat and the spare parts package inside the lifeboat should be able to float on the water. 3.1.6 The crew quota of the lifeboat shall not be less than 6 people. 3.2 Structural and performance requirements
3.2.1 Floating tires
3.2.1.1 The buoyancy of a lifeboat shall be divided into at least two independent air chambers, each of which shall be inflated by a one-way inflation valve installed thereon. The buoyancy shall be arranged so that when any of the air chambers is damaged or cannot be inflated, the remaining air chamber can still support the load in a fully loaded state, and the lifeboat shall still have dry sailing all around.
Approved by China State Shipbuilding Corporation on February 1, 1994, and implemented on August 1, 1994
CB3593--94
3.2.1.2 The occupied volume of each passenger after the buoyancy is inflated (excluding the canopy columns and the thwart plate) shall be in accordance with Table 1. Table 1
Volume of floating tube per person
Throw-away life raft
Type B3)
Note: 1) Type A: throw-away inflatable life raft for international voyage ships, referred to as Type A raft. 2) Type B: throw-away inflatable life raft for domestic voyage ships, referred to as Type B raft. 3.2.2 Bottom of raft
Liftable life raft
The life raft should be equipped with a watertight raft bottom of air sandwich structure, on which facilities for inflating and deflation by passengers should be provided. 3.2.2.1
After the life raft is inflated, the effective area of the bottom of the raft (measured to the innermost edge of the floating tube) occupied by each passenger shall be in accordance with Table 2. Table 2
Area of the bottom of the raft occupied by each person
3.2.3 Canopy
Thrown-type life raft
Liftable life raft
3.2.3.1 The canopy of the life raft should be a sandwich structure; the B-type raft may be a single-layer structure, and the canopy of the sandwich structure should have facilities to prevent water accumulation in the sandwich.
3.2.3.2 The canopy should be able to automatically prop up during the descent of the life raft or when it reaches the water surface. 3.2.3.3. The canopy of a life raft with a rated passenger capacity of more than 8 people should have at least two symmetrically arranged canopy doors; only one can be provided for a life raft with a rated passenger capacity of less than or equal to 8 people. Each canopy door should be equipped with a closing device that can be effectively adjusted and can be opened easily and quickly on both the inside and outside of the raft. After the canopy door is closed, it should be sufficiently tight to prevent the intrusion of seawater and cold wind, but sufficient air can be introduced for the passengers to breathe. 3.2.3.4 At least one lookout window should be provided, but it may not be provided for Type B lifeboats. 3.2.3.5 There should be facilities for collecting rainwater.
3.2.3.6 The outer fabric should be a bright and visible orange color, and the color of the lining should not make the occupants feel uncomfortable. 3.2.3.7 The rated occupants wearing life jackets sitting under the canopy should have sufficient space height so as not to hinder the operation of various accessories. 3.2.4 Climbing facilities
3.2.4.1 A semi-rigid climbing platform should be provided at least at one entrance of the lifeboat. The structure of the platform should be such that when it is damaged, there will be no obvious leakage of the buoyancy. For hanging lifeboats with more than one entrance, the climbing platform should be located at the entrance opposite to the approach rope. Type B lifeboats may not be provided with a climbing platform.
3.2.4.2 A ladder should be provided at the entrance where there is no landing platform, and the lowest step should be located not less than 0.4m below the lightest waterline of the liferaft.
3.2.4.3 The liferaft should be equipped with facilities to help people pull themselves into the liferaft from the ladder. 3.2.5 Fittings
3.2.5.1 The liferaft should be firmly equipped with chain ring handle ropes along the outer and inner sides of the raft body. The handle ropes should be synthetic fiber ropes with a diameter of not less than 10mm or ropes with a width of not less than 25mm. 3.2.5.2 The life raft shall be provided with an effective cable, the length of which shall not be less than twice the distance from the storage place to the lightest load navigation waterline and not less than 15m. Its breaking strength (including the parts connected to the lifeboat) shall not be less than 10kN for lifeboats with 9 persons or more, and not less than 7.5kN for other lifeboats. The lifeboat can be inflated by one person pulling the cable, and the pulling force shall not exceed 150N. 3.2.5.3 A lighting lamp approved by the experienced ship department shall be installed on the top of the life raft canopy, and shall automatically light up when the life raft is inflated and enters the water. 3.2.5.4 A lighting lamp approved by the experienced ship department shall be installed inside the lifeboat, and shall automatically light up when the life raft is inflated and enters the water. 3.2.5.5 Retro-reflective materials approved by the experienced ship department shall be attached to the life raft at a position that helps detection, and B-type boats may not be provided. 2
3.2.6 Stability and dryness
CB3593--94
3.2.6.1 The average dryness of the lifeboat when fully loaded and the bottom of the raft is not inflated should not be less than 300mm. 3.2.6.2 The lifeboat should be equipped with a balance water bag. When it is inflated and the canopy is propped up to the highest position and floats on the water, it should be stable in wind and waves. When the passengers gather on one side, the lifeboat will not be submerged and there is no danger of capsizing. 3.2.6.3 The lifeboat should be able to be righted by one person in wind and waves and in calm water when it is in a capsized position. 3.2.6.4 After a sea anchor is lowered when the liferaft is fully loaded, it can be towed at a speed of 3kn in calm waters. The Type B lifeboat does not lower the sea anchor. 3.2.7 Strength
3.2.7.1 Each air chamber of the lifeboat should be able to withstand at least 3 times the working pressure without joint slippage, rupture or other defects. The safety valve should be able to prevent the pressure of each air chamber from exceeding 2 times the working pressure of the lifeboat. The test pressure drop shall not exceed 5%. 3.2.7.2 The lifeboat should be able to withstand the rated passengers jumping from a height of at least 4.5m above the bottom of the boat. The number of jumps should not be less than the approved number of passengers on the raft.
3.2.7.3 The fully packaged lifeboat should be able to withstand being thrown into the water from a height of at least 18m. The boat and its accessories should not affect its use. Fresh water containers are allowed to have damage without leakage.
3.2.7.4 If the lifeboat is stored at a height of more than 18m above the light load waterline, the boat should be able to withstand being thrown at the actual storage height. The liferaft and its accessories should not affect the use. The fresh water container is allowed to have a leakage of no more than 5% under one of the following conditions: a. The fresh water supply has been increased by 5%, or it is equipped with a desalinator that can produce an equal amount of fresh water; b. The fresh water container is stored in a watertight outer packaging. 3.2.7.5 The liferaft should be able to withstand floating on the sea for thirty days. 3.2.8 Inflation and airtightness
3.2.8.1 The liferaft should be inflated with non-toxic gas, and the gas storage volume should be sufficient to make the liferaft reach the working pressure in Table 3. Table 3
Throwing type
Each independent air chamber of the liferaft should be equipped with a one-way inflation valve, air supply valve and safety valve at an appropriate position. 3.2.8.3 The liferaft should be automatically inflated and formed when thrown into the water. Variable type
3.2.8.4 When the lifeboat is inflated at an ambient temperature of 18-20℃, it should be inflated and formed within 1 minute, and the A-type throwing-type fireboat and the hanging fireboat should reach the working pressure.
3.2.8.5 When the lifeboat is inflated at an ambient temperature of -30℃, it should be inflated and formed within 3 minutes, and the A-type throwing-type fireboat and the hanging fireboat should reach the working pressure.
3.2.8.6 When the lifeboat is inflated at an ambient temperature of 65℃, the safety valve should have sufficient passing capacity to prevent the lifeboat from being damaged due to overpressure, and to prevent the maximum pressure from reaching twice the closing pressure of the safety valve during the inflation process. The lifeboat should not have joint sliding, rupture or other defects.
3.2.8.7 The air chamber of the lifeboat should have sufficient airtightness: a. When the safety valve is blocked, when the float is inflated to 1.5 times the working pressure, the pressure is maintained for 3 minutes, and the pressure drop shall not be greater than 5%. The lifeboat should not have joint sliding or rupture. Type B rafts are exempt from this requirement; b. When each air chamber is inflated to the working pressure, the pressure is maintained for 6 hours. After compensating for changes in temperature and atmospheric pressure, the pressure drop shall not be greater than 10%. Type B rafts maintain pressure for 2 hours, and the pressure drop shall not be greater than 10%; c. When the bottom of the lifeboat is inflated to the working pressure, after 1 hour, the pressure drop shall not exceed 5% without compensating for changes in temperature and atmospheric pressure.
3.2.9 Maneuverability
CB3593--94
3.2.9.1 When the lifeboat is fully loaded, it can be propelled at least 25m by the oars provided. 3.2.9.2 When the lifeboat is fully flooded, it should still be able to support its rated occupants and remain seaworthy, and the raft body should not be seriously deformed. 3.3 Main materials for lifeboats
The physical and mechanical properties of the body tape and outer tent tape of the lifeboat shall be in accordance with Table 4. Table 4
Tensile strength
Elongation
Breaking strength
Anti-aging performance
Joint strength
Oil resistance
Low temperature resistance
Coating adhesion
Anti-curve performance according to
Method A2.8.1
Method A2.8.2
Watertight test
(Hydropressure test)
Airtight test
Ozone resistance
Seawater resistance
Weight per unit area|| tt||Main buoyancy, bottom, tent column
not less than 2kN/5cm width
not more than 35%
not less than 40N
Floating tire, tent column: radial direction not less than 800N; weft direction not less than 750N,
Performance index
Outer tent
not less than 0.5kN/5cm width
Bottom: radial and weft directions not less than 700N
No adhesion, cracking or other performance degradation. After aging test, the tensile strength is not less than 90% before aging. Before and after the aging test, the change in size is no more than 2%. During the tensile test, there should be no breakage at the joints. No stickiness or other performance degradation. No cracks or other performance degradation. No less than 10N/1cm width. No separation between the fabric and the rubber. The tensile strength after the flexure test is not less than 90% of that before the test. No cracks or performance degradation after 200,000 cycles of flexure. No hydrogen test is less than (3L/m)/24h. No bubbles after 5min. No visible cracks. |No delamination, fading, no breakage at the joint during tensile test
As required by the manual
No adhesion, cracking or other performance degradation. After aging test, the tensile strength is not less than 90% of that before aging
No breakage at the joint during tensile test
No bursting, leakage or other performance degradation
No visible cracks
As required by the manual
If the bottom of the inflatable life raft is a double-layer structure, the minimum tensile strength of the second layer of adhesive tape is 1.15kN/5cm, and the minimum tearing strength is 450N.
3.3.2 The adhesive used for the life raft should be able to make the joint strength not less than the breaking strength of the life raft body material. 3.3.3 The main body tape should be of uniform thickness, consistent color, and smooth surface. It should not have any defects that affect the quality of the product, such as bubbles, dents, lack of adhesive, cracks, mechanical damage, soft impurities larger than 0.5mm, and hard impurities. 4
3.4 Accessories
3.4.1 The accessories of the life raft shall be equipped according to Table 5. Serial number
First aid medicine box, box
rocket parachute flame signal, 1
hand-held flame signal, 1
floating smoke signal, 1
rations, 1/person
fresh water, L/person
flashlight, 1
floating scoop, 1
paddle, 1
sponge, 1
sea anchor, 1
can opener, 1
whistle, 1
radar reflector, 1
daylight signal mirror, CB3593-94
A-type Xiao, hanging Xiao||tt ||Quantity
A Equipment 1)
B Equipment 2》
Type B Xiao
Quantity
It is a waterproof
box that can be closed tightly after use, containing
approved by the competent department and should be installed
in a waterproof outer shell
must be approved by the competent department and should be installed
in a waterproof outer shell
must be approved by the competent department and should be installed
in a waterproof outer shell
Each portion of
ration approved by the competent department shall not be less than 10MJ and shall be packaged in
non-toxic airtight In a waterproof container
Stored in a rust-free and non-toxic watertight container approved by the competent authorities
Should be a waterproof
flashlight suitable for Morse communication, together with a spare
set of batteries
and a bulb, installed in the same waterproof
container
One for less than 12 people, two for 13
or more
Should be buoyant
approved by the competent authorities, one on the bamboo and one spare
or equivalent sound equipment
Must be approved by the competent authorities
Must be approved by the competent authorities and Attached to the instructions for the use of ship and aircraft communication. The containers should be placed in waterproof containers with sufficient buoyancy, and the containers should be fixed in the raft. Fishing gear, set of thermal insulation equipment, drinking water measuring cup, cleaning bag, one/person, life-saving instructions, inflator, buoyant life ring, knife, repair tool bag, seasickness tablets, tablets/person, experience book, emergency action instructions, instruction manual, CB 3593--94
Continued Table 5
Type A Xiao, Suspension Xiao
Equipment Quantity
A Equipment
Note: 1) A Equipment: The legal equipment quantity of Type A Xiao accessories. B equipment 2)
1~~2
B type Xiao
equipment quantity
or enough for 10% of the authorized passengers, whichever is more
made of stainless material
with 1 signal diagram
with a buoyant rope of not less than 30m in length
with a non-folding knife with a buoyant handle if the number of passengers is less than 13, and an additional non-folding knife if the number of passengers is 13 or more
with instructions for use and repair tools
2) B equipment: passenger ships engaged in short-distance international routes are allowed to reduce the number of A type Xiao equipment after ship inspection. 3.5 Storage cylinder
3.5.1 The storage cylinder should be durable in various sea conditions. Installation
Acid tablet wall dynamic rod sensitive turn ketone
Break whip brain
Suspicious tank leg
3.5.2 The storage tube packed with fully assembled lifeboat should have sufficient buoyancy in the water. When the ship sinks, the cable can be pulled out of the tube and the life raft can be inflated and formed.
3.5.3 The storage tube should be watertight except for the drain hole. 3.6 Suspended raft additional requirements
In addition to meeting the requirements of 3.1 to 3.5, the suspended life raft should also meet the following conditions: the suspended suspended raft should be able to withstand repeated boarding of passengers, no excessive deformation when carrying the rated passengers, and can use the lifting equipment to safely land the raft body without damage;
When the suspended raft is fully loaded with the rated load, it should be able to withstand the collision force with the ship at a speed of at least 3.5m/s, and from 3mb.
Falling from a height shall not cause damage that affects performance; c.
When the ambient temperature and the raft body temperature are both 20±3℃ and all safety valves are not used, the suspended lifeboat shall be able to withstand four times the rated load;
When the ambient temperature and the raft body temperature are both -30℃ and all safety valves are not used, the suspended lifeboat shall be able to withstand d.
1.1 times the rated load;
The lifeboat shall be equipped with a lifting assembly, a stabilizing rope, a pulling rope and a ladder CB3593-94
f. The strength of the lifting assembly shall not be less than 6 times the mass of the lifeboat with the rated load: g. The storage container shall be secured to prevent the container or its parts from falling into the sea during the inflation and landing of the lifeboat contained therein and afterwards;
After being fully loaded with the rated load, the liferaft shall not be damaged or deformed when landing at any angle of 20°. h.
4 Test method
4.1 Weight determination
Weigh the fully packed life raft. If the weight exceeds 185kg, weigh the different combinations of storage rafts and spare parts packages. The test results should comply with Article 3.1.4.
4.2 Appearance inspection
Inflate the life raft body to the working pressure, and then visually inspect the appearance. The test results should comply with Article 3.1.1. 4.3 Main dimension inspection
Put the life raft body on a flat surface, inflate it to the working pressure, measure the outer dimensions of the raft by projection method, and measure the diameter of the buoy and the height of the raft body. The test results should comply with Article 3.1.1. 4.4 Damage test
If any buoy is damaged or inflated, the other intact buoy or several air chambers should be able to support its rated occupants in a positive dry run around the entire life raft. The test results should comply with Article 3.1.1. 4.5 Canopy Sealing Test
At a distance of 3.5m from the buoy and 1.5m high, flush the inlet and its surroundings with a water flow of 2300L/min through a hose with a diameter of 63.5mm for 5 minutes. The test results should comply with Article 3.2.3.3. This test is not performed on Type B lifeboats. 4.6 Loading and Riding Test
Measure the dry run of the lifeboat when it is empty (i.e. including accessories but no passengers) without inflating the bottom of the lifeboat. Then, the approved passengers with an average weight of 75kg wearing life jackets board the liferaft and after they are properly seated, the dry run of the liferaft is recorded again.
Then, the bottom of the liferaft is inflated. At this time, all seated people have sufficient space and headroom, and can use various accessories in the liferaft. The test results should comply with Article 3.2.6.1.
4.7 Stability test
Make the approved occupants of the test boat gather first on the first side of the boat, and then on one end. At this time, the lifeboat should not be in danger of drowning. Each dry measurement should be measured from the waterline to the lowest point on the top surface of the highest layer of buoys. When two people wearing approved life jackets board the empty boat, rescue the third person who pretends to be unconscious (the third person faces away from the entrance so that he cannot support the two rescuers). The balance water bag of the boat is sufficient to overcome the overturning moment during the rescue. The test results should comply with Article 3.2.6.2. 4.8 Boarding test
4.8.1 Boarding test of type A raft
The boarding test should be carried out in waters deep enough to prevent boarding with external force. During the test, no more than 4 adults with different physiques who are not good at swimming and approved by the ship inspection, wearing shirts, trousers or a jumpsuit, and wearing approved life jackets for adults, must swim 100m in the water (no rest should be allowed before reaching the life raft for boarding). Each person should try to board the raft alone without the help of other swimmers or people already on the life raft.
If 3 people have boarded the life raft without help, the fourth person may be allowed to board the raft with the help of others. The test results should comply with Article 3.2.4.3.
4.8.2 Type B selects 3 adults with different physiques who are not good at swimming. During the test, they wear shirts, trousers and life jackets. After swimming for 90m, they board the raft without stopping. Among them, 2 people board the Shinouchi in deep water without any help, and the other person can board with the help of others. The test results comply with Article 3.2.4.3.
4.9 Righting Test
4.9.1 Type A Raft
CB3593-94
Before the test, turn over the lifeboat with the heaviest equipment bag and all entrances, openings and other openings on the canopy open, for not less than 10 minutes. When the canopy of the lifeboat is completely filled with water, the canopy columns shall be deflated to cause it to collapse if necessary. The righting test personnel shall be the same group of people who conducted the boarding test, wearing the same clothes and life jackets as required in Article 4.8 and completing the same swimming distance. At least one person who righted the lifeboat shall weigh less than 75kg. Each person shall right the lifeboat independently. The water depth shall be sufficient to prevent any outside help when the swimmer boards the overturned lifeboat. The test results shall comply with Article 3.2.6.3. 4.9.2 Type B Raft
When a life raft is capsized in deep water, it shall be righted by an adult without any help. The test result shall comply with 3.2.6.3.
4.10 Towing Test
After the life raft is fully loaded with the authorized number of passengers and spare parts, the sea anchor is lowered and it is towed in still water at a speed of 3kn. The towing distance shall not be less than 1km. The test result shall comply with 3.2.6.4. The sea anchor may not be lowered during the Type B test.
4.11 Overpressure test
4.11.1 Type A raft
Block the safety valve of each buoy chamber (excluding the raft bottom), remove the gas source of the gas cylinder, pressurize each air chamber to 3 times the working pressure for 30 minutes, and measure the leakage pressure drop when the adhesive tape of each air chamber of the life raft is stretched stably and reaches the equilibrium state. Without correction for temperature and atmospheric pressure, the test result shall comply with Article 3.2.7.1. 4.11.2 Type B raft
Conduct an overpressure test at 3 times the working pressure for 5 minutes, and the test result shall comply with Article 3.2.7.1. 4.12 Jumping test
For the life raft with and without the canopy erected, a person weighing not less than 75kg wearing hard-soled shoes with flat heels and no spikes jumps onto the life raft from a height of at least 4.5m above the bottom of the raft. A simulated object of equivalent value may also be dropped into the lifeboat for a jump test. The test result shall comply with 3.2.7.2. 4.13 Throwing test
4.13.1 The fully packaged lifeboat is hoisted to a height of 18m and then thrown into the water. If the storage height of the lifeboat on board exceeds 18m, it shall be thrown from the storage height. The test result shall comply with 3.2.7.3 and 3.2.7.4. 4.13.2 When the liferaft begins to enter the water, its automatic inflation and molding time from the time when the lifeboat collapse cable tied to the hanging point is pulled out to the time when the lifeboat enters the water and is molded shall comply with 3.2.8.4 to 3.2.8.6. 4.13.3 Let the inflated lifeboat float on the water for 30 minutes. Then, lift the lifeboat from the water and check the lifeboat, spare parts and accessories, and storage tube. The result shall comply with 3.2.7.3 or 3.2.7.4. 4.14 Mooring test
Load the lifeboat with the total weight of the crew and accessories, and moor it at sea or in a seawater port for mooring test. It is allowed to add air to the lifeboat once a day with a manual pump; the test results should comply with Article 3.2.7.5. After this test, it should be subjected to overpressure test in accordance with the provisions of 4.11.1 and 4.11.2.
4.15 Inflation test
4.15.1 Pull the cable to inflate the lifeboat packed in each type of storage tube, and record the time of the following working conditions: a. Inflate each buoy into a round shape and allow boarding; b. The canopy is erected;
The lifeboat reaches the maximum working pressure when inflated at room temperature, low temperature, and high temperature. c.
4.15.2 Normal temperature inflation test
Inflate the lifeboat at an ambient temperature of 18-20℃. The test result shall comply with 3.2.8.4. 4.15.3 Low temperature inflation test
CB3593-94
Before inflating the lifeboat at -30℃, place the two fully packaged lifeboats at room temperature for at least 24 hours, and then place them in a 30℃ low temperature room for another 24 hours. Then pull the cable to inflate it. The test result shall comply with 3.2.8.5. 4.15.4 High temperature inflation test
Before the lifeboat is inflated at a temperature of +65°C, the fully packaged lifeboat shall be placed at room temperature for at least 24 hours, and then placed in a heating chamber at 65°C for at least 7 hours for Type A rafts and at least 6 hours for Type B rafts. Then, the cable shall be pulled to inflate it. The test results shall comply with Article 3.2.8.6. 4.16 Airtightness test
4.16.1 The air chambers of the lifeboat shall be inflated to 1.5 times the working pressure, and the pressure shall be maintained for 30 minutes with the safety valves blocked. The test results shall comply with Article 3.2.8.7a.
4.16.2 The air chambers of the lifeboat are inflated to the working pressure. The test results shall comply with 3.2.8.7b. 4.16.3 The bottom of the lifeboat is inflated to the working pressure. The test results shall comply with 3.2.8.7c. 4.16.4 After the test, the opening pressure and closing pressure of each safety valve shall be adjusted to the design value. 4.17 Maneuverability test
The fully loaded lifeboat is paddled in still water with the provided oars. The test results shall comply with 3.2.9.1. 4.18 Flooding test
The lifeboat is fully immersed in water, fully loaded with rated passengers, and subjected to 10 waves with a wave height of 0.3m. The test results shall comply with 3.2.9.2 (the waves can be generated by the wake of the boat or other equivalent methods). This test is not performed on Type B lifeboats. 4.19 The lifeboat cable shall be subjected to a tensile test using a tensile machine. The results shall comply with 3.2.5.2. 4.20 Buoyancy test of spare parts package
Put the spare parts package equipped in accordance with the regulations into the water pool for 30 minutes. The test results should comply with Article 3.1.5. 4.21 Buoyancy test of free-floating lifeboat Put the lifeboat with the maximum weight of the spare parts package and the storage tube into the water for free floating buoyancy test. Pull the lifeboat cable downwards and the lifeboat should be able to inflate and take shape. The test results should comply with Article 3.5.2. 4.22 Additional test of suspendable inflatable life raft 4.22.1 Boarding test
The lifeboat is lifted by a lifting device and pulled against the side of the ship or simulated side of the ship. An average occupant with an average weight of 75kg is boarded. Then, the stabilizing rope is released. After the lifeboat is suspended for 5 minutes, it is lowered to the sea or ground and the load is unloaded. It is required to conduct at least three tests in succession. The test results should comply with Article 3.6a. During the test, the distance between the hook of the lifting equipment and the side of the ship is: a. half of the maximum width of the lifeboat plus 150mm; b. half of the maximum width of the lifeboat,
c. half of the maximum width of the lifeboat minus 150mm. 4.22.2 Impact testwwW.bzxz.Net
The lifeboat is loaded with a weight equal to its approved occupant and accessories, and it is suspended freely so that the lifeboat is close to a rigid vertical plane, and then the lifeboat is pulled apart horizontally so that the impact point between the lifeboat and the rigid plane is raised by 0.625m in the vertical direction, and then the lifeboat is released and hits the rigid plane at a speed of 3.5m/s. The test results shall comply with Article 3.6b. 4.22.3 Drop test
The lifeboat is loaded according to the provisions of 4.22.2, and a load release device is used to lift the lifeboat 3m above the water surface, and it is released and dropped into the water, and then the lifeboat is inspected. The test results shall comply with Article 3.6b. 4.22.4 Strength test
Lift the lifeboat from the central lifting ring and conduct an overload test on the lifeboat by the following procedure: Place the lifeboat at a temperature of 20±3℃ for at least 6 hours; a.
b. Lift the lifeboat through its lifting ring or sling and inflate the air chamber of the lifeboat (excluding the bottom of the lifeboat); c. Inflate until the safety valve opens and closes automatically, then block the safety valve; d. Lower the lifeboat, load it with a uniform load equal to 4 times the weight of its approved occupants and spare parts and accessories, 75kg per person, and then lift the lifeboat again for a duration of not less than 5 minutes. The test results should comply with Article 3.6c.
4.22.5. Low temperature hoisting test
After the life raft is placed in a freezer at -30℃ for 6 hours, with all safety valves in operation, the life raft supports a load of 1.1 times its rated occupants and accessories. The rated load is added to the life raft in the freezer, the bottom of the raft is not inflated, and the fully loaded life raft should remain suspended for at least 5 minutes. If the life raft must be removed from the freezer for suspension, it should be suspended immediately after being removed from the room, and the test results should comply with Article 3.6d.
4.22.6 Simulated landing test
The life raft is loaded with a weight equivalent to the heaviest spare parts package and the rated occupants (75 kg for each occupant). Except that the bottom of the raft is not inflated, the life raft is inflated with all safety valves in operation. A life raft can slide continuously for at least 4.5 m along a slope representing a 20° adverse heel. The test results shall comply with Article 3.6h. 4.23 Material Tests
The materials used to make lifeboats shall be tested for the following properties and the approval of the ship inspection department shall be obtained: a.
Tensile strength test;
Tear strength test;
Aging test;
Seam strength test;
Oil resistance test;
Low temperature resistance test;
Coating adhesion test;
Watertight test;
Airtight test (except awning cloth);
Heat resistance test;
Weathering test;
Abrasion test.
Tapes are tested in batches based on monthly production, and the inspection items and requirements are in accordance with Table 6. Table 6
Tear strength
Tear elongation
Anti-aging performance
Coating adhesion
Seam strength
Cold resistance
Oil resistance
Seawater resistance
Breathability
Thickness of adhesive tape
Weight per unit area
Ozone resistance
Main adhesive tape
Once per batch
Once per batch
Once per batch times
Once every quarter
Once per batch
Once per batch
Once a year
Once a year
Once a quarter
Once a batch
Once a quarter
Once a year
Roof cloth
Once every half year
Once every half year
Once every half year
Once every half year
Once every half year
Once a batchPut down the lifeboat, load it with a uniform load equal to 4 times the weight of its approved passengers and spare parts, 75kg per person, and then hoist the lifeboat for not less than 5 minutes. The test result shall comply with Article 3.6c.
4.22.5. Low temperature hoisting test
After the lifeboat is placed in a freezing room at a temperature of -30℃ for 6 hours, with all safety valves functioning, the lifeboat supports a load of 1.1 times its approved passengers and accessories. The lifeboat is placed in the freezing room with the approved load, and the bottom of the lifeboat is not inflated. The fully loaded lifeboat shall remain suspended for at least 5 minutes. If the liferaft must be removed from the freezing room for suspension, it shall be suspended immediately after being removed from the room. The test result shall comply with Article 3.6d.
4.22.6 Simulated landing test
The lifeboat is loaded with a weight equivalent to the heaviest spare parts package and the approved passengers (75kg for each passenger). Except that the bottom of the raft is not inflated, the lifeboat is inflated with all safety valves functioning. A lifeboat can continuously slide down a slope representing a 20° adverse heel for at least 4.5m. The test results should comply with Article 3.6h. 4.23 Material Tests
The materials used to make lifeboats shall be tested for the following properties and the approval of the ship inspection department shall be obtained: a.
Tensile strength test;
Tear strength test;
Aging test;
Seam strength test;
Oil resistance test;
Low temperature resistance test;
Coating adhesion test;
Watertight test;
Airtight test (except for awning cloth);
Heat resistance test;
Weathering test;
Abrasion resistance test.
Tapes are tested in batches based on monthly production, and the inspection items and requirements are as shown in Table 6. Table 6
Tear strength
Tear elongation
Anti-aging performance
Coating adhesion
Seam strength
Cold resistance
Oil resistance
Seawater resistance
Breathability
Thickness of adhesive tape
Weight per unit area
Ozone resistance
Main adhesive tape
Once per batch
Once per batch
Once per batch times
Once every quarter
Once per batch
Once per batch
Once a year
Once a year
Once a quarter
Once a batch
Once a quarter
Once a year
Roof cloth
Once every half year
Once every half year
Once every half year
Once every half year
Once every half year
Once a batchPut down the lifeboat, load it with a uniform load equal to 4 times the weight of its approved passengers and spare parts, 75kg per person, and then hoist the lifeboat for not less than 5 minutes. The test result shall comply with Article 3.6c.
4.22.5. Low temperature hoisting test
After the lifeboat is placed in a freezing room at a temperature of -30℃ for 6 hours, with all safety valves functioning, the lifeboat supports a load of 1.1 times its approved passengers and accessories. The lifeboat is placed in the freezing room with the approved load, and the bottom of the lifeboat is not inflated. The fully loaded lifeboat shall remain suspended for at least 5 minutes. If the liferaft must be removed from the freezing room for suspension, it shall be suspended immediately after being removed from the room. The test result shall comply with Article 3.6d.
4.22.6 Simulated landing test
The lifeboat is loaded with a weight equivalent to the heaviest spare parts package and the approved passengers (75kg for each passenger). Except that the bottom of the raft is not inflated, the lifeboat is inflated with all safety valves functioning. A lifeboat can continuously slide down a slope representing a 20° adverse heel for at least 4.5m. The test results should comply with Article 3.6h. 4.23 Material Tests
The materials used to make lifeboats shall be tested for the following properties and the approval of the ship inspection department shall be obtained: a.
Tensile strength test;
Tear strength test;
Aging test;
Seam strength test;
Oil resistance test;
Low temperature resistance test;
Coating adhesion test;
Watertight test;
Airtight test (except for awning cloth);
Heat resistance test;
Weathering test;
Abrasion resistance test.
Tapes are tested in batches based on monthly production, and the inspection items and requirements are as shown in Table 6. Table 6
Tear strength
Tear elongation
Anti-aging performance
Coating adhesion
Seam strength
Cold resistance
Oil resistance
Seawater resistance
Breathability
Thickness of adhesive tape
Weight per unit area
Ozone resistance
Main adhesive tape
Once per batch
Once per batch
Once per batch times
Once every quarter
Once per batch
Once per batch
Once a year
Once a year
Once a quarter
Once a batch
Once a quarter
Once a year
Roof cloth
Once every half year
Once every half year
Once every half year
Once every half year
Once every half year
Once a batch
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