Some standard content:
National Standard of the People's Republic of China
Thermal protective aids for life-saving
Thermal protective aids for life-saving 1 Subject content and scope of application
This standard specifies the technical requirements, test methods and inspection rules for thermal protective aids for life-saving GB 12757-91
Thermal protective clothing and thermal bags. This standard applies to thermal protective aids used by people in distress in ship lifeboats, rescue boats and other cold environments. 2 Reference standards
GB252 Light diesel oil
HG2-158 Test method for thermal conductivity of plastics (steady-state method) 3 Terms and definitions
Thermal protective aids 3.1
A bag or clothing made of waterproof material with low thermal conductivity for the wearer to keep warm. 3.2 Suit type thermal protective aids Clothing-type thermal protective aids.
3.3 Thermal insulation bag
Bag type thermal protective aidsBag-shaped thermal insulation equipment.
4 Product classification
Basic dimensions and codes
The products are divided into thermal insulation clothing and thermal insulation bags. The basic dimensions and codes of thermal insulation clothing and thermal insulation bags are shown in Table 1. Table 1 Basic dimensions and codes
Thermal insulation clothing
Thermal insulation bag
Marking example
Life-saving thermal insulation equipment, length 2000mm, width 900mm Thermal insulation clothing ￥2000×900
GB12757
Thermal insulation bag D2000×900
GB 12757
5 Technical requirements
5.1 Materials
5.1.1 Materials for heat preservation appliances
Approved by the State Administration of Technical Supervision on March 26, 1991578
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≥2000
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Basic size
≥900
199112-01 implementation
5.1.1.1 Thermal conductivity shall not exceed 0.25W/(m·K). GB 12757—91
5.1.1.2 When supporting the pressure of a 2m high water column, its watertight integrity shall be maintained. 5.1.1.3 If aluminized film is used, its coating shall be uniform without obvious blanks, pits, or line marks. 5.1.2 Opening and closing parts
Opening and closing parts shall not be rusted or dirty after contact with seawater, and shall be easy to open and close; when zippers are used, they shall be able to be opened and closed from both inside and outside; when drawstrings are used, they shall have lockers and be easy to open and close.
5.2 Insulating clothing and insulation bags
5.2.1 Insulating clothing is in the shape of clothing, with upper and lower limbs and waist connected, cuffs and trouser legs closed; insulation bags are in the shape of pockets. Insulating clothing and insulation bags shall be non-toxic after being made into finished products; the seams shall have sufficient strength; only the face shall be exposed after wearing. 5.2.2 After the finished product is immersed in diesel at room temperature for 24 hours, there shall be no damage such as dissolution, expansion, deterioration, or cracking, and the thermal conductivity shall still not exceed 0.25 W/(m·K).
5.2.3 If a heat reflection layer is used, the reflection surface shall be on the inner surface of the insulating clothing or insulation bag after it is made into the finished product. 5.2.4 The insertion point of the thermal clothing and thermal bag shall not have jagged edges when cutting. 5.2.5 The thermal clothing and thermal bag shall function normally within the range of -30 to +20℃. 5.2.6 The thermal clothing and thermal bag shall not shrink, crack, swell, decompose or change in mechanical properties within the range of -30 to +65℃. 5.2.7 The outer surface of the thermal clothing and thermal bag shall have obvious and visible color. 5.2.8 The dimensional tolerance of the thermal clothing and thermal bag is ±10mm. The length of the thermal clothing and thermal bag does not include the length of the hood. 5.3 Wearing and discarding
5.3.1 The thermal clothing and thermal bag can be opened in the lifeboat or rescue boat. After reading the instructions, the wearer can wear it on the outside of the life jacket. 5.3.2 If it affects the swimming ability in the water and needs to be discarded, it can be discarded within 2 minutes without the help of others. 6 Test methods
6.1 Appearance inspection
The appearance inspection of materials shall meet the requirements of 5.1.1.3, and the opening and closing parts shall meet the requirements of 5.1.2. The appearance inspection of thermal insulation equipment shall meet the requirements of 5.2.1, 5.2.3, 5.2.4, and 5.2.7. 6.2 Material thermal conductivity test
Perform in accordance with HG2-158, and the results shall meet the requirements of 5.1.1.1. 6.3 Material water tightness test
Take the thermal insulation material and place it on a special fixture. The pressure area of the material is a circular surface with a diameter of 100mm. Apply a 2m water column pressure head to the material for 10 minutes. The test results shall meet the requirements of 5.1.1.2. 6.4 Temperature cycle test
6.4.1 Equipment
a. High temperature electric heating constant temperature box;
b. Constant temperature and low temperature refrigerator.
6.4.2 Methods
On the first day of the test, first adjust the high temperature constant temperature box to 65±2℃, put the insulation clothes or insulation bags into the box, take them out after 8 hours, and place them at room temperature until the second day;
b. On the second day of the test, adjust the constant temperature refrigerator to -30±2℃, put the insulation clothes or insulation bags into the box, take them out after 8 hours, and place them at room temperature until the third day;
c. Repeat 6.4.2a. and b. as one cycle, and conduct 10 times in total. 6.4.3 The test results shall meet the requirements of 5.2.6. 6.5 Diesel resistance test
6.5.1 Equipment
One container with appropriate size;
b. One pressure test piece grid.
6.5.2 Method
GB 12757—91wwW.bzxz.Net
Seal and tie all openings of the test piece, put it into a container, and then press the grid on the test piece. Inject light diesel oil in GB252 so that the diesel a.
surface is 100mm higher than the test piece.
Soak the test piece in diesel oil at room temperature for 24h. b.
6.5.3 Test results
Wipe the test piece clean with oil, check the test piece, and test its thermal conductivity according to 6.2. The result should meet the requirements of 5.2.2. 6.6 Wearing and discarding test
6.6.1 Wearing test
6.6.1.1Select no less than three healthy test subjects, wearing winter clothes. After putting on the life jacket, board the lifeboat or lifeboat, open the thermal clothing or thermal bag, read the instructions for use, and then wear the thermal clothing or thermal bag outside the life jacket. 6.6.1.2 Under the environmental conditions of -30 ± 2℃, open and put on the thermal clothing or thermal bag, and the test piece shall not be damaged. 6.6.2 Drop test
6.6.2.1 There shall be no less than three test subjects, who shall wear life jackets and thermal clothing or thermal bags. The test subjects shall fall into the water from the lifeboat or lifeboat, and the water depth shall be higher than the test subjects. In the water, the test subjects shall perform the action of dropping the thermal clothing or thermal bag. 6.6.2.2 The test results shall meet the requirements of 5.3.2. 7
Inspection rules
7.1 Type inspection
Type test shall be carried out when any of the following situations occur. 7.1.1
Testing and identification of new products or old products transferred to the factory for production; after formal production, if there are major changes in structure, materials, and processes that may affect product performance; during normal production, after a certain amount of production has been accumulated, a periodic inspection should be carried out; when the product is resumed after a long period of suspension; when the factory inspection results are significantly different from the last type inspection; when the national quality supervision agency proposes a requirement for type inspection. For type testing, three products are taken for the test. The type inspection items are shown in Table 2. Table 2
Inspection items
Material thermal conductivity test
Material water tightness test
Appearance inspection
Dimension inspection
High and low temperature test
Oil resistance test
Wearing and discarding test
Test method
Perform according to 6.2
Perform according to 6.3
Perform according to 6.1
Measure with a ruler
Perform according to 6.4
Perform according to 6.5
Perform according to 6.6.1 and 6.6.2
Result requirements
Meet 5.1.1.1
Meet 5.1.1.2
Meet 5, 1, 1.3, 5.1.2, 5.2, 1, 5.2.3, 5.2.4, 5. 2.7
Meet specification requirements and 5.2.8
Meet 5.2.5, 5.2.6
Meet 5.2.2
Meet 5.3.1, 5.3.2 requirements
7.1.3 If all the inspection items specified in Table 2 are qualified, the type inspection is qualified. If one of them is unqualified, the type inspection is unqualified.
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7.2 Factory inspection
GB 12757-91
7.2.1 Insulation clothing or insulation bags produced with the same batch number and the same process are batched into 100 pieces. 2% of each batch is sampled for inspection. If less than one batch, 2 pieces are sampled for factory inspection.
7.2.2 The factory inspection items are shown in Table 3 or stipulated in the contract between the buyer and the manufacturer. Table 3
Watertightness test
Dimension inspection
Appearance inspection
Perform according to 6.3
Measure with ruler
Perform according to 6.1
Result requirements
Meet 5.1.1.2
Meet its specification requirements and 5.2.8
Meet 5.1.1.3, 5.1.2, 5.2.1, 5.2.3, 5.2.4, 5.2.7
7.2.3 If one item does not meet the requirements of the inspection items in 7.2.2, double sampling should be carried out; if there are still unqualified items, the criticism shall be unqualified.
8 Marking, packaging and storage
8.1 Marking
The outer packaging of each thermal clothing or thermal bag shall have the product name, model and standard number, manufacturer name and trademark, manufacturing year and month and batch number.
8.2 Packaging
Qualified products shall be packaged in parts. Each product package shall be accompanied by a product certificate and instruction manual. The certificate shall indicate the product name, model, manufacturer name, factory date, batch number and the seals of the factory inspector and ship inspection department. 8.3 Storage
Thermal clothing or thermal bags shall not come into contact with acids, alkalis, oils and fats, solvents such as acetone and other chemicals that may damage the thermal clothing or thermal bags, and shall be stored in a dry and ventilated place.
Additional instructions:
This standard is jointly proposed by the Ministry of Transport of the People's Republic of China and China State Shipbuilding Corporation. This standard is under the jurisdiction of the Lifesaving Equipment Subcommittee of the National Technical Committee for Standardization of Ship Equipment. This standard was drafted by China Seafarers Foreign Technical Service Company Tianjin Company, China Shipbuilding Corporation General Navigation Design Office, Ministry of Transport Standards and Metrology Institute, Ship Inspection Bureau Tianjin Branch, Chinese Academy of Fishery Sciences. The main drafters of this standard are Dong Yuren, Bo Jiqun, Jin Shengli, Ma Bingshen, Xi Xueshi, and Chen Guizhi.
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