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National Standard of the People's Republic of China
Technical requirement for lifeboat davit installationGB 13406—92
This standard complies with the requirements of the 1983 Amendment to the International Convention for the Safety of Life at Sea (SOLAS), 1974, and the Recommendations on Testing of Life-saving Appliances (Resolution A521[13] of the International Maritime Organization (IMO) and the Specifications for Life-saving Appliances for Seagoing Ships (1989, 1990) of the Ship Inspection Bureau of the People's Republic of China.
1 Subject content and scope of application
This standard specifies the technical requirements, test methods, inspection rules and markings for davit installations (hereinafter referred to as davits). This standard applies to various open lifeboats, partially enclosed lifeboats, fully enclosed lifeboats and lifeboat davits used on various types of seagoing ships and military ships sailing internationally and domestically. This standard does not apply to the stern free-fall lifeboat launching device. 2 Reference standards
GB8242.4 Terminology of marine equipment Life-saving equipment GB8923 Rust grade and rust removal grade of steel surface before painting 3 Terminology
3.1 Weight of empty lifeboat W
The weight of the lifeboat when it is fully equipped with the specified accessories. 3.2 Total weight of lifeboat W2
The total weight of the lifeboat when it is fully loaded with the rated passengers and the specified accessories (75kg per person). 3.3 Lowering speed
The stable speed measured after the empty lifeboat is lowered 1 to 2 meters (m/s). 3.4 Lowering height H
The height from the top of the lifeboat arm to the lightest load navigation water line when the ship is in a positive floating state and the boat arm is fully turned out (m). 3.5 Remote control boat launching device
The device for the crew in the boat to pull the thin steel cable to operate the lifeboat winch to lower the boat. 3.6 Remote control boat launching device
Device for the boat launching crew to remotely operate the lifeboat winch on the deck to lower the boat. 3.7 Remote control rope inside the boat
The hand-pulled thin steel rope for remotely controlling the lifeboat winch in the remote control boat launching device inside the boat. 3.8 Davit frame
Combined component in the davit that supports all loads of the davit arm and the boat. 3.9 Cable device
Device to pull the lifeboat and tie it against the ship's navigable area to allow personnel to board safely. Approved by the State Administration of Technical Supervision on March 30, 1992 582
Sub-category marking Industry information department free download
Implementation on January 1, 1993
4 Technical requirements
4.1 Design, layout and installation requirements for davits
GB13406-92
4.1.1 The design and layout of the davits on board shall meet the following requirements: a. The hull of the lifeboat shall not protrude outward;
b. When the ship is listed inward by 20° and tilted by 10°, the lifeboat can slide out of the boat deck smoothly and land safely during the process of the boat davit arm turning outward (it is allowed to install a slide on the edge of the boat deck); c. When the ship is listed inward by 20° and tilted by 10°, no obstacles that affect the boat davit arm when it is dumped outward shall be stored in the space.
4.1.2 The force area of the boat davit support on the boat deck shall be calculated according to the maximum force of the boat davit support, and the longitudinal and transverse components under the deck shall be strengthened to ensure that the boat deck does not deform when the ship is tilted inward and outward, so as not to affect the boat launch. 4.1.3 The arrangement of the boat davit on the ship shall enable all passengers to board the boat quickly. 4.1.4 The lifeboat winch matched with the boat davit must meet the following basic requirements: a. The working load must be greater than the load required by the davit to recover the empty lifeboat with the weight of W plus 2 persons (if the rescue boat has the weight of 6 persons) from the outside to the storage position, and greater than the maximum load acting on the winch during the process of dumping the fully loaded lifeboat from the outside to the lowering process; b. The rope capacity of the drum must not exceed three layers, and must be sufficient to store the sufficient length of the sling required to smoothly lower the boat to the water surface under the severe working conditions of the ship's lightest seagoing draft and 20° inward heel and 10° bow trim; the sling is made of anti-rotation and corrosion-resistant flexible steel wire rope with a tensile strength of 1550~~1700N/mm2, and the diameter of the winch steel rope must match the sling diameter required by the davit pulley; d. The structure of the lifeboat winch must be compatible with the davit's inboard remote control boat launching device. 4.1.5 The layout position of the lifeboat winch on the ship's boat deck should meet the following requirements: a. One person can operate the lifeboat winch on the spot or by remote control from a certain position on the deck of the boat, and can always see the movement of the lifeboat during the whole process of launching and retracting the lifeboat;
b. The horizontal distance between the center line of the lifeboat winch drum and the center line of the vertical guide pulley on the deck is not less than 2.5m to ensure that the winch reels and arranges the cables neatly.
4.2 Design requirements for davits
4.2.1 When the ship is tilted to 10° and tilted to 20° in any direction, the davits should rely on gravity (not any power) to smoothly dump and safely land the fully equipped lifeboat when it is fully loaded with rated passengers or without passengers. 4.2.2 The davit should have the following devices:
Remote control boat launching device inside the boat;
b. =Railing device;
Boat chain device: the lifting hook in the device should be reasonably coordinated with the lifeboat hook to meet the requirements of safe lifeboat release when the ship speed is 5kn in still water;
d. If an open or partially enclosed lifeboat is used, a boat release safety rope device is required, including a transverse rope and no less than two lifelines, the length of which should be sufficient to reach the water surface when the ship is under the lightest load navigation state and at an unfavorable trim and any heel of 20°; e: If the lifeboat winch is arranged far away from the deck edge, a flashing edge remote control boat release device is required; f. A safety device that automatically cuts off the power before the boat davit returns to its original position. 4.2.3 The safety factor used in the design of the davit should not be less than the minimum safety factor based on the specified maximum working load and the ultimate strength of the material selected for the structure, and its value should comply with the provisions of Table 1. 4.2.4 The design of the davit should be kept ready for use. The safety system and lashing system of the stowed boat must be able to be released quickly. It is required that the preparation for boarding and landing (i.e. the state of launching the boat) should be completed within 5 minutes from the issuance of the abandon ship order by two crew members. 4.2.5 The design of the davit device should make it possible to avoid the steel cable being guided on the deck as much as possible. 4.2.6 The design of the mooring device should be properly matched with the fixing groove of the boat. 583
Davit arm, davit seat
Davit chain, sling, chain ring, pulley, eye plate, fastener and other davit steel cables
Note; Yield limit of materials in the table; Strength limit of materials;
[] Allowable stress.
GB13406---92
4.2.7 The design of the davit device should facilitate the adjustment of the trim of the stowed boat. a./Lo]
Minimum safety factor
4.2.8 The davit device should be designed to allow the davit arm to be tilted out and the empty hook to be lowered under no-load conditions (reversal of the lifeboat winch is allowed).
4.2.9 The davit should remain effective to the extent practicable in ice conditions. 4.2.10 The materials of the main parts of the davit shall be as specified in Table 2. Table 2
Parts Name
Boat Lift Arm
Boat Lifting Frame
Boat Lifting Chain
Structural Steel for Hull
Ordinary Carbon Structural Steel
High Quality Carbon Structural Steel
Alloy Structural Steel
Cast Aluminum Bronze
4.2.11 The design of the pulley of the boat lift rope shall meet the following requirements: Material
Steel Grade or Brand
Q235-A
ZCuAl10Fe3
a. The depth of the pulley groove shall not be less than 2.5 times the diameter of the steel rope; b. The diameter of the pulley groove shall not be less than 12 times the diameter of the steel rope; Standard No.
GB3077
GB1176
c. The total clearance of the pulley in the shell shall not exceed 2 mm to prevent the steel cable from being embedded in the clearance and causing jamming. 4.3 Manufacturing process requirements
4.3.1 The butt welds of the davit arm panels shall be inspected by non-destructive testing to ensure the welding quality. 4.3.2 The parallelism deviation of the two channels of the davit seat shall not exceed 1 mm, and it shall be straight and free of distortion after welding. Remarks
Rotating shaft device
4.3.3 Welding must be carried out in accordance with the welding process approved by the ship inspection, and the welding rod must be a low-hydrogen welding rod approved by the ship inspection with the same strength as the parent material.
The manufacturing surface of the davit should be smooth. After welding and forming, it must be fully derusted to meet the requirements of GB8923 steel surface rust before painting 4.3.4
grade and rust removal grade Sa2 yuan
report grade. After the appearance inspection, apply 3 degrees of anti-rust primer, and 2 degrees of paint after loading. 4.3.5 Various riggings (non-rustproof materials) of the rig must be galvanized parts, and the moving parts are all coated with lubricating oil. 5 Test methodbZxz.net
5.1 Before the general assembly of the rig, the relevant lifting parts must be subjected to a tensile test. The test load is 2.2 times the working load of the parts. After the test time is 5 minutes, there shall be no permanent deformation, cracks or any other damage. After passing the inspection and being marked with the ship inspection mark, it can be assembled and the bench test can be carried out. 5.2 The rig shall be subjected to a bench test at the manufacturer before loading. The test method is shown in Table 3. 584
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GB 13406-92
GB13406-92
5.2.1 The test of the remote control boat launching device in the boat shall meet the following requirements: a: After the installation of the remote control boat launching device in the boat, it shall not affect the local operation of the lifeboat winch to launch the boat. It is required that during the process of the davit arm being transferred from the stowed position to the outer side, the weight on the remote control cable inside the boat should be sufficient to overcome the friction of various small guide pulleys on the control cable, so as to avoid the phenomenon that the boat is lowered but the remote control cable pull head does not lower, which may cause the cable to fall off, be entangled, twist and jam, and other phenomena that are not conducive to the normal launch of the boat; b. The brake of the lifeboat winch shall not be affected by the weight of the fully released remote control cable inside the boat (for example, the brake hammer is lifted under the action of the gravity of the steel cable);
The remote control inside the boat is required to be flexible and can play the role of remote control of the lifeboat winch to lower the boat and brake at any time; c.
d. The relative vertical distance between the remote control cable pull head inside the boat and the simulated lifeboat shall remain close throughout the entire descent process, and shall not change more than 200mm within the descent range of 5m;
e. After the test, all parts of the remote control device shall not have any abnormal phenomenon. 5.3 After the davit is loaded on board, it shall be subjected to comprehensive tests on the actual ship. The ship shall be in a positive floating state. The test methods are shown in Table 4.6 Inspection rules
6.1 All parts shall be inspected by the inspection department of the manufacturer in accordance with the drawings and technical documents approved by the Ship Inspection Bureau. Important parts shall be permanently marked after passing the inspection.
6.2 The first davits of various models shall be type approved by the Ship Inspection Bureau. The design drawings and strength, davit arm backing force, and lifeboat winch load calculations shall be approved by the Ship Inspection Bureau. Products can only be loaded on board after obtaining the product certificate of the Ship Inspection Bureau. 6.3 The davits of the davit manufacturer shall be subjected to type inspection and factory inspection in accordance with the following requirements. 6.3.1 Type inspection
6.3.1.1 Type inspection shall be carried out in any of the following situations: a. Trial production and identification of new products or old products transferred to the factory for production; b. After formal production, if there are major changes in structure, materials and processes that may affect product performance; c.
In normal production, after 4 years or 100 scaffolds have been accumulated, an inspection should be carried out periodically; d. When the product is resumed after a long period of suspension; e. When the factory inspection results are significantly different from the last type inspection; f. When the national quality supervision agency proposes a requirement for type inspection. 6.3.1.2 Type inspection items and requirements shall be in accordance with Table 3. 6.3.2 Factory inspection
6.3.2.1 Each scaffold shall be inspected for delivery. 6.3.2.2 Factory inspection items and requirements shall be in accordance with items 1 and 4 (or 1 and 6) in Table 3. 6.4 After loading on board, the shipyard shall carry out a comprehensive test of the actual ship and boat, including: appearance inspection;
b. Inspection items and requirements shall be in accordance with Table 4.
6.5 If the davit fails the test, the design unit and the manufacturer shall jointly find out the reasons and make corrections, and then conduct the test again until all are qualified.
13406—
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Marking, packaging, transportation and storage
GB 13406—92
The davit that passes the test acceptance shall have the following marks: 7. 1
Product name;
Name of the design unit;
Name of the manufacturer;
Model and standard number;
Working load;
Diameter of the boat sling;
Weight;
Date of manufacture;
Inspection pass stamp (including statutory inspection mark); Operation nameplate (including Chinese and English).
When the davit is stored and transported in bulk, the davit arm and the davit seat frame should be reinforced with supporting materials and then tied with straw ropes. The davit arm rotating shaft device and all other movable parts such as pulleys should be oil-sealed before packing. 7.3 During the transportation of the davit, pay attention to reasonable storage and tying to avoid rotating The moving parts may collide and cause damage. 7.4 When the davit is stored in the warehouse, the oil seal should be checked regularly (6 months) and replaced if necessary. 588
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A1 Classification and types of davits
A1.1 Gravity inverted arm davit
GB13406—92
Appendix A
Regulations on the classification and compilation of davit models
(reference)
a. S type: gravity inverted arm davit with an arm shape of S. b. L type: gravity inverted arm davit with an arm shape of I. A1.2 Gravity slide rail davit||tt| |aR type: gravity slide davit.
b. H type: gravity cross-deck davit. A2 Provisions for davit models
A2.1 Davit models are expressed as follows:
Note: ① The davit model codes are S, L, R, and H; davit working load, kN
Back-mounted davit
Long-arm davit
Dent type code
② Indicates a long-arm davit with a davit chain length greater than or equal to 2m. For ordinary davits with a davit chain length less than 2m, the Latin letter marking is omitted; ③B indicates a back-mounted davit with a lifeboat winch installed on the davit. For example, a vertical davit with a lifeboat winch installed on the deck, English letters are omitted;
A2.2 Example of boat davit model marking
S-type gravity inverted arm, long arm, back-type davit with a working load of 80kN: davit: SZB80GB13406--92
R-type gravity slide rail, ordinary, vertical davit with a working load of 100kN: davit: R100GB13406-92
A2.3 If the above compilation regulations cannot express the technical requirements of the boat davit designer, other codes can be added to the suffix of the model without affecting the above regulations.
Additional instructions:
This standard is proposed by China State Shipbuilding Corporation. This standard is under the jurisdiction of the Lifesaving Equipment Sub-Technical Committee of the National Technical Committee for Ship Drying Standardization. This standard is drafted by Shanghai Ship Research and Design Institute. The main drafter of this standard is Chen Peiji.
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Free download of Jixing Standard Industry Information2 The first davits of various types shall be type approved by the Ship Inspection Bureau, and the design drawings and calculations of strength, davit arm backing force, and lifeboat winch load shall be approved by the Ship Inspection Bureau. Products can only be loaded on board after obtaining the product certificate of the Ship Inspection Bureau. 6.3 The davits of the davit manufacturer shall be subject to type inspection and factory inspection in accordance with the following requirements. 6.3.1 Type inspection
6.3.1.1 Type inspection shall be carried out in any of the following situations: a. Trial design and identification of new products or old products transferred to the factory for production; b. After formal production, if there are major changes in structure, materials, and processes that may affect product performance; c.
In normal production, periodic inspection shall be carried out after 4 years or after accumulating 100 pairs of davits; d. When the product is resumed after a long period of suspension; e. When the factory inspection results are significantly different from the last type inspection; f. When the national quality supervision agency proposes a requirement for type inspection. 6.3.1.2 Type inspection items and requirements shall be in accordance with Table 3. 6.3.2 Factory inspection
6.3.2.1 Each davit shall be subject to factory inspection. 6.3.2.2 Factory inspection items and requirements shall be in accordance with items 1 and 4 (or 1 and 6) in Table 3. 6.4 After loading, the shipyard shall conduct a comprehensive test of the actual ship and boat, including: appearance inspection;
b. Inspection items and requirements shall be in accordance with Table 4.
6.5 If the davit test fails, the design unit and the manufacturer shall jointly find out the cause and make corrections, and then conduct tests again until all are qualified.
13406—
tuwoos
\(s/u90
（2000=
o01+'m
Marking, packaging, transportation and storage
GB 13406—92
The davit that has passed the test and acceptance shall have the following marks: 7. 1
Product name;
Name of the design unit;
Name of the manufacturer;
Model and standard number;
Working load;
Diameter of the boat sling;
Weight;
Date of manufacture;
Inspection pass stamp (including statutory inspection mark); Operation nameplate (including Chinese and English).
When the davit is stored and transported in bulk, the davit arm and the davit seat frame should be reinforced with supporting materials and then tied with straw ropes. The davit arm rotating shaft device and all other movable parts such as pulleys should be oil-sealed before packing. 7.3 During the transportation of the davit, pay attention to reasonable storage and tying to avoid rotating The moving parts may collide and cause damage. 7.4 When the davit is stored in the warehouse, the oil seal should be checked regularly (6 months) and replaced if necessary. 588
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A1 Classification and types of davits
A1.1 Gravity inverted arm davit
GB13406—92
Appendix A
Regulations on the classification and compilation of davit models
(reference)
a. S type: gravity inverted arm davit with an arm shape of S. b. L type: gravity inverted arm davit with an arm shape of I. A1.2 Gravity slide rail davit||tt| |aR type: gravity slide davit.
b. H type: gravity cross-deck davit. A2 Provisions for davit models
A2.1 Davit models are expressed as follows:
Note: ① The davit model codes are S, L, R, and H; davit working load, kN
Back-mounted davit
Long-arm davit
Dent type code
② Indicates a long-arm davit with a davit chain length greater than or equal to 2m. For ordinary davits with a davit chain length less than 2m, the Latin letter marking is omitted; ③B indicates a back-mounted davit with a lifeboat winch installed on the davit. For example, a vertical davit with a lifeboat winch installed on the deck, English letters are omitted;
A2.2 Example of boat davit model marking
S-type gravity inverted arm type, long arm type, back-type davit with a working load of 80kN: davit: SZB80GB13406--92
R-type gravity slide rail type, ordinary type, vertical type davit with a working load of 100kN: davit: R100GB13406-92
A2.3 If the above compilation regulations cannot express the technical requirements of the boat davit designer, other codes can be added to the suffix of the model without affecting the above regulations.
Additional instructions:
This standard is proposed by China State Shipbuilding Corporation. This standard is under the jurisdiction of the Lifesaving Equipment Sub-Technical Committee of the National Technical Committee for Ship Drying Standardization. This standard is drafted by Shanghai Ship Research and Design Institute. The main drafter of this standard is Chen Peiji.
Standard Search Zero Network
Free download of Jixing Standard Industry Information2 The first davits of various types shall be type approved by the Ship Inspection Bureau, and the design drawings and calculations of strength, davit arm backing force, and lifeboat winch load shall be approved by the Ship Inspection Bureau. Products can only be loaded on board after obtaining the product certificate of the Ship Inspection Bureau. 6.3 The davits of the davit manufacturer shall be subject to type inspection and factory inspection in accordance with the following requirements. 6.3.1 Type inspection
6.3.1.1 Type inspection shall be carried out in any of the following situations: a. Trial design and identification of new products or old products transferred to the factory for production; b. After formal production, if there are major changes in structure, materials, and processes that may affect product performance; c.
In normal production, periodic inspection shall be carried out after 4 years or after accumulating 100 pairs of davits; d. When the product is resumed after a long period of suspension; e. When the factory inspection results are significantly different from the last type inspection; f. When the national quality supervision agency proposes a requirement for type inspection. 6.3.1.2 Type inspection items and requirements shall be in accordance with Table 3. 6.3.2 Factory inspection
6.3.2.1 Each davit shall be subject to factory inspection. 6.3.2.2 Factory inspection items and requirements shall be in accordance with items 1 and 4 (or 1 and 6) in Table 3. 6.4 After loading, the shipyard shall conduct a comprehensive test of the actual ship and boat, including: appearance inspection;
b. Inspection items and requirements shall be in accordance with Table 4.
6.5 If the davit test fails, the design unit and the manufacturer shall jointly find out the cause and make corrections, and then conduct tests again until all are qualified.
13406—
tuwoos
\(s/u90
（2000=
o01+'m
Marking, packaging, transportation and storage
GB 13406—92
The davit that has passed the test and acceptance shall have the following marks: 7. 1
Product name;
Name of the design unit;
Name of the manufacturer;
Model and standard number;
Working load;
Diameter of the boat sling;
Weight;
Date of manufacture;
Inspection pass stamp (including statutory inspection mark); Operation nameplate (including Chinese and English).
When the davit is stored and transported in bulk, the davit arm and the davit seat frame should be reinforced with supporting materials and then tied with straw ropes. The davit arm rotating shaft device and all other movable parts such as pulleys should be oil-sealed before packing. 7.3 During the transportation of the davit, pay attention to reasonable storage and tying to avoid rotating The moving parts may collide and cause damage. 7.4 When the davit is stored in the warehouse, the oil seal should be checked regularly (6 months) and replaced if necessary. 588
Standard Search Zero Network
Free download of various standard industry information
A1 Classification and types of davits
A1.1 Gravity inverted arm davit
GB13406—92
Appendix A
Regulations on the classification and compilation of davit models
(reference)
a. S type: gravity inverted arm davit with an arm shape of S. b. L type: gravity inverted arm davit with an arm shape of I. A1.2 Gravity slide rail davit||tt| |aR type: gravity slide davit.
b. H type: gravity cross-deck davit. A2 Provisions for davit models
A2.1 Davit models are expressed as follows:
Note: ① The davit model codes are S, L, R, and H; davit working load, kN
Back-mounted davit
Long-arm davit
Dent type code
② Indicates a long-arm davit with a davit chain length greater than or equal to 2m. For ordinary davits with a davit chain length less than 2m, the Latin letter marking is omitted; ③B indicates a back-mounted davit with a lifeboat winch installed on the davit. For example, a vertical davit with a lifeboat winch installed on the deck, English letters are omitted;
A2.2 Example of boat davit model marking
S-type gravity inverted arm, long arm, back-type davit with a working load of 80kN: davit: SZB80GB13406--92
R-type gravity slide rail, ordinary, vertical davit with a working load of 100kN: davit: R100GB13406-92
A2.3 If the above compilation regulations cannot express the technical requirements of the boat davit designer, other codes can be added to the suffix of the model without affecting the above regulations.
Additional instructions:
This standard is proposed by China State Shipbuilding Corporation. This standard is under the jurisdiction of the Lifesaving Equipment Sub-Technical Committee of the National Technical Committee for Ship Drying Standardization. This standard is drafted by Shanghai Ship Research and Design Institute. The main drafter of this standard is Chen Peiji.
Standard Search Zero Network
Free download of Jixing Standard Industry Information3 If the above provisions cannot express the technical requirements of the davit designer, other codes can be added to the model without affecting the above provisions.
Additional Notes:
This standard is proposed by China State Shipbuilding Corporation. This standard is under the jurisdiction of the Lifesaving Equipment Sub-Technical Committee of the National Technical Committee for Ship Equipment Standardization. This standard is drafted by the Shanghai Ship Research and Design Institute. The main drafter of this standard is Chen Peiji.
Standard Search Zero Network
Technical Standard Industry Information Free Download3 If the above provisions cannot express the technical requirements of the davit designer, other codes can be added to the model without affecting the above provisions.
Additional Notes:
This standard is proposed by China State Shipbuilding Corporation. This standard is under the jurisdiction of the Lifesaving Equipment Sub-Technical Committee of the National Technical Committee for Ship Equipment Standardization. This standard is drafted by the Shanghai Ship Research and Design Institute. The main drafter of this standard is Chen Peiji.
Standard Search Zero Network
Technical Standard Industry Information Free Download
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