GB 10543-1989 Rubber hoses for aircraft ground refueling and oil draining
Some standard content:
National Standard of the People's Republic of China
Rubber hoses for aircraft ground fuelling and 'defuelli ng
1 Subject content and scope of application
GB10543-89|| tt||This standard specifies the specifications, structures, technical requirements, test methods and acceptance rules of six types of rubber hoses used for aircraft ground refueling and oil draining.
This standard applies to rubber hoses used by airport ground refueling trucks and other refueling equipment or facilities to transport or discharge aviation fuel oil to aircraft fuel tanks. The applicable ambient temperature is -26~55℃, and there is no danger when used in climate conditions of -40~70℃. Reference standards
GB528
GB1189
GB1689
GB1690
GB2941
GB3512
GB5562
GB5563
GB5564
GB5566
GB5567
GB9571
Determination of tensile properties of vulcanized rubber
hose appearance quality
vulcanized rubber resistance Determination of abrasive properties (using Akron abrasion machine) Test method for liquid resistance of vulcanized rubber
Standard temperature, humidity and time for parking and testing of rubber test pieces Rubber hot air aging test method
Physical test of hose rubber layer Methods
Hose hydraulic pressure test method
Hose low-temperature bending test method
Hose crush resistance test method
Hose vacuum resistance test method
Rubber, plastic soft Evaluation of ozone resistance of pipes under static conditions Determination of resistance of rubber, plastic hoses and hose assemblies GB9572
GB9573
GB9576
GB9577
Rubber, plastic soft Methods for measuring the dimensions of pipes and hose assemblies Guidelines for the selection, storage, use and repair of plastic hoses and hose assemblies Rubber,
: Marking, packaging and shipping rules
Rubber, plastic hoses and Hose assembly
Model, structure, grade and size
3
3.1 Model and structure
Due to different anti-static methods and structures, rubber hoses can be divided into There are six models as follows: Type A - No static conductive rubber hose is required. The hose consists of an inner rubber layer, a fabric reinforcement layer and an outer rubber layer. Metal wire conductive static rubber hose. The hose is composed of inner rubber layer, fabric reinforcement layer, conductive metal wire and outer rubber layer. Type B-
Type C-
One rubber layer electrostatic conductive rubber hose. The hose consists of an inner rubber layer, a fabric reinforcement layer and a conductive outer rubber layer. The inner rubber layer can also be a conductive rubber layer.
Low fuel pollution rubber layer conductive static rubber hose. The hose is composed of a low fuel pollution inner rubber layer, a fabric reinforcement layer, and a conductive outer rubber layer.
Type E
Antistatic discharge and suction rubber hose with metal spiral wire. The hose is composed of an inner rubber layer, a fabric reinforcement layer, and a metal spiral layer with good electrical conductivity. Approved by the Ministry of Chemical Industry of the People's Republic of China on 1989-02-10 and implemented on 1989-12-01
GB10543-89
and outer rubber layer.
F-type one-rubber layer conductive static discharge rubber hose. The hose is composed of an inner rubber layer, a fabric reinforcement layer, a non-metallic spiral reinforcement layer and a conductive outer rubber layer.
3.2 grade
All types of rubber hoses are divided into two levels according to working pressure: Level I - the maximum working pressure is 1.0MPa, Level II -
- maximum working pressure The pressure is 1.5MPa
3.3 Specifications, dimensions and tolerances
The inner diameter size,
glue layer thickness, length and tolerance of the hose should comply with the requirements in Table 1. Table 1
nominal inner diameter
minimum thickness of inner and outer rubber layers
size
19.0
25.0
31.5
38.0
50.0
63.0
76.0
101.5
Tolerance
±0.75
±1.25
1.6
±1.50
±2.00
Note: Special specifications shall be agreed upon by both parties. Technical requirements
4.1 Appearance quality
The appearance quality of the hose should comply with the requirements of GB1189. 4.2 Concentricity
Hose length
Size
10000
20000
25000
10.000
mm||tt| | Tolerance | More than 2.0mm.
4.3 Pressure requirements
The test pressure and the ratio of the minimum burst pressure to the working pressure of the rubber hose should comply with the requirements in Table 2. Table 2
Hose model
A, B, C, D type
E type
F type
Test pressure/working pressure||tt ||2.0
1.33
1.25
Minimum burst pressure/working pressure
4.0
2.67
2.5
GB :10543—89
4.4 Unit weight of rubber hose
The maximum weight of rubber hose per meter length shall comply with the provisions of Table 3. Table 3
Unit weight, kg/m
Nominal inner diameter size, mm
A, B, C, D type I level
19.0
25.0
31.5
38.0
50.0
63.0
76.0
101.5
4.5
Rubber properties
The properties of rubber materials for manufacturing hoses should comply with the requirements in Table 4. Property
Energy
Item
Tensile strength, MPa
Elongation at break, %
Hot air aging
(70 ±1c×168h)
Wear disc, cm3
mesh
0.9
1.1
1.4
1.7
2.7
3.5
4.0
6.5
Table 4
Minimum value
Minimum value
Tensile strength change rate, %
Change rate of elongation at break, %
Maximum value
B liquid volume change rate (40℃×48h), % fuel soluble matter, %||tt ||Low temperature performance (-40±1℃×30min)
Maximum value
Maximum value
A, B, C, D type II level, E, F type·|| tt||1.1
1.5
1.9
2.2
3.0
4.0
4.7
8.0||tt| |Referring
Inner rubber layer
7.0
250
Not required
50
3.0
No cracks| |tt||Standard
Outer rubber layer
7.0
300
30~-30
30~-30
0.8| |tt||75
Not required
No cracking
4.6 Finished product performance
4.6.1
The performance of the finished hose should comply with the requirements in Table 5.
Property
Energy
Adhesion strength (adhesive layer and fabric
material layer), kN/m minimum value
Ozone resistance performance||tt ||Conductive properties
Bending properties\)
Item
Item
Initial value
After filling with B liquid
GB10543—89| |tt||Table 5
(40±2℃, 50pphm, 72h)
Type A
Type B, E
Type C, D, F|| tt||under normal temperature conditions
(20±5℃)
under low temperature conditions
(25±3℃×24h)
bending properties (only for A , B, C, D type) hydraulic test
vacuum performance
flattening recovery rate, %
(only for F type)
test pressure (5min)
Burst pressure
Absolute pressure 15kPa
Absolute pressure 35kPa
Absolute pressure 85kPa
After 1min
After 10min
Test pressure
refers to
2.0
1.5
no cracking
not required
bulb shell, good electrical conductivity||tt| |Standard
The resistance value is between 1×10~1×10°2/m without obvious permanent deformation or structural damage,
The conductive performance still meets the requirements
The maximum bending force is not More than 200N
No obvious permanent deformation or structural damage,
The conductive performance still meets the requirements
Type P does not exceed the compliance fee
Type D does not exceed 7% ;
Length change rate:
C.
The conductive performance still meets the requirements
Conforms to the requirements of Table 2
A, B, C, D type and Type E has no obvious structural damage, and the solid ball of type E rolls freely
Type F has no obvious structural damage, and the solid ball rolls freely
A, B, C, and D solid balls roll freely||tt| |90
95
1.25 times working pressure test meets the requirements
Note: 1) With the consent of the user,
bend test under low temperature conditions can be in accordance with national standards Conducted in accordance with GB5564, the hose should have no cracks or leaks. Test methods
5
5.1 The specifications, dimensions, appearance quality and concentricity of hoses shall be implemented in accordance with GB9573. GB10543—89
5.2 Unit weight of hose, take a hose with a length of more than 1m for inspection by weighing method: unit weight (kg/m)
5.3 Rubber performance inspection: ||tt ||Hose weight (kg)
Hose length (m)
The vulcanized rubber test pieces are parked in accordance with the regulations of GB2941 and then various performance tests are carried out. 5.3.1 The rubber tensile property test shall be carried out in accordance with GB528. Hot air aging test shall be carried out according to GB3512. 5.3.2
5.3.3
Abrasion test shall be carried out in accordance with GB1689.
B liquid volume change resistance test is performed according to GB1690. 5.3.4
Fuel soluble matter test shall be carried out in accordance with Appendix A. 5.3.5
5.3.6
Low temperature performance test shall be carried out according to Appendix B.
5.4 Finished product performance inspection:
No test should be conducted within 24 hours after the hose is made, and the sample should be parked at the test room temperature for at least 3 hours. (1)
5.4.1· Adhesion strength test of finished hose, the initial value shall be tested in accordance with GB5562. Adhesion strength test after filling with liquid B: Cut a hose to be tested with a length of about 300mm, seal one end, pour liquid B into the hose, cover the lid, and place the sample at 20±5℃ 168+. h, then pour out liquid B, and after leaving it for 2 hours, conduct the test according to GB5562. 5.4.2 For the ozone test, use the same material and production process to make a test hose with an inner diameter of 25mm, and perform it according to GB9571 Method 1.
5.4.3 Conductive performance test:
5.4.3.1B, E-type hose test: Put a 4.5V battery and a 3.8V 0.3A test bulb with the wires at both ends of the hose When connected, the test bulb lights dimly, indicating that the conductive continuity of the hose is good. 5.4.3.2 The test of type C, D and F hoses shall be carried out in accordance with GB9572. 5.4.4 Bending test shall be carried out according to Appendix C. 5.4.5 Bending test: bend the hose at 20±5°C until an obvious bend is formed. Then loosen the hose and let it rest in its natural state for 10 seconds. min, visually inspect the hose for obvious structural damage or permanent deformation, and measure the electrical conductivity of the hose.
5.4.6
5.4.7
Hydraulic test shall be carried out according to GB5563.
The vacuum test is performed according to GB5567. The diameter of the solid ball used for the test is 0.8 times the inner diameter of the hose. 5.4.8
: Flattening resistance test, take a hose with a length of not less than 500mm as the sample, compress the hose until the outer diameter is reduced by 50% according to GB5566, hold for 60±1s, release the compression force, Measure the minimum value of the outer diameter after 1 minute and 10 minutes. The compression recovery rate e (%) is calculated according to formula (2):
e(%)
where: D.
D'
-The average outer diameter of the hose before compression, mm;
D
D.
The average outer diameter of the hose after the compression force is released, mm. The hose compression test is followed by a test pressure test. 6 Inspection Rules
The tubes are divided into batches, and the quantity in each batch is no more than 100. The rubber material performance test is based on the rubber material used to manufacture the batch of hoses as a representative, and vulcanized test pieces are used. The finished product performance test is based on the sample taken from each batch of hoses represented by one specification. 6.3 Inspection items and minimum inspection times should comply with the requirements in Table 6. Rubber
Finished product
Inspection
Inspection items
Tensile properties and hot air aging
B liquid volume change rate
Fuel Soluble
Wear amount
Low temperature performance
Mesh
GB10543—89
Table 6
Dimensional measurement (inner diameter, adhesive layer Thickness, concentricity, length) Conductive properties
Adhesion strength
Vacuum test
Hydraulic test for test pressure
Burst test
Ozone test|| tt||Bending test
Bending test
Flat resistance test
Unit weight
Each test
V
Each batch Inspection
V
V
V
V
Inspection every 10 batches
V
y||tt| |V
V
V
V
6.4. If any index fails to pass the performance inspection of the rubber or finished product, double samples should be taken from the batch of products or the rubber used to manufacture the batch of products, and the unqualified items should be retested. After retesting, if one of the samples still fails to meet one of the indicators, the batch of products will be deemed unqualified. 7 Marking, packaging, transportation and storage Www.bzxZ.net
7.1 The hose mark should include the following:
a. Manufacturer's name or trademark,
b. Product name, model, specifications and working pressure level; c. Production Date.
The two ends of the 7.2C type hose are clearly marked with three circles of yellow markings, indicating that the rubber layer of the hose conducts static electricity. 7.3 Hoses with an inner diameter less than 76mm are packaged in coils, and the inner diameter of the coil shall not be less than 15 times the inner diameter of the hose. Hoses with an inner diameter greater than 76mm (including 76mm) should be packed straight. 7.4 The storage, transportation and other contents of hoses should comply with the regulations of GB9576 and GB9577. A1 Instrument
Analytical balance: accurate to 0.001g;
Erlenmeyer flask: 250mL;
Beaker: 200mL;
water bath,
electric constant temperature drying oven;
dryer.
A2 sample
GB10543-89
Appendix A
Determination of fuel soluble matter
(supplement)
Vulcanization Cut the test piece into small pieces of approximately 3mm2. A3 Test steps
A3.1 Use an analytical balance to accurately weigh 5±0.01g of the sample (G) and place it in an Erlenmeyer flask, add 100 mL of solution B, cover the Erlenmeyer flask, and maintain the temperature at 40±2°C Extracted in a constant temperature drying oven for 96 hours. A3.2 While hot, filter the solution in the Erlenmeyer flask with filter paper into a pre-weighed beaker, and further wash the Erlenmeyer flask and filter with a small amount (10 mL) of solution B.
A3.3 Place the beaker in a water bath to evaporate until about 1mL of the solution remains, then move it to a drying oven at 150±3°C for 2 hours. A3.4 Transfer the beaker to a desiccator to cool the evaporation residue to room temperature, weigh it, and obtain the net weight of the residue (G,). A3.5 Do a blank test of solution B (110mL) under the same conditions as A3.3, and get the weight of the blank residue (G.). A4 Result Calculation
Fuel soluble matter A (%) is calculated according to formula (A1): G, -G.
G
where: G——sample weight, g,
G,——fuel blank residue weight, g;
G,——fuel soluble The weight of the residue of the object is g. X100 | | tt | B1 device
The test device is shown in Figure B1.
B2 sample step pump
GB10543-89
Appendix B
Low temperature performance test method
(supplement)
Figure B1 Low temperature performance test device
B2.1 Fix a 150mm×25mm×2mm (length×width×thickness) test piece on two fixtures so that the sample is on the same plane and the two fixtures The exposed length between the two clamps is 127mm, and then reduce the distance between the two clamps by 1mm. B2.2 Place the clamped test piece into a cryogenic chamber or into a Dewar bottle containing refrigerant (until the test piece is completely immersed). Place at a temperature of 401c for 30min.
B2.3 Take out the clamps and move one clamp to the other within 20s to reduce the distance between the clamps by 25mm. B2.4 Check the cracks of the test piece.
Note: The refrigerant can be obtained by adding methanol or ethanol to crushed dry ice (solid carbon dioxide). The temperature is maintained by carefully adding dry ice cubes. GB10543—89
Appendix C
Bending performance test method
(Supplement)
C1 Bend test under normal temperature (20±5℃) conditions for a soft The pipe is bent according to the bending radius given in Table C1. After loosening, visually inspect the hose for obvious permanent deformation or structural damage, and then measure the conductive properties of the hose. Table C1
nominal inner diameter
19.0
25.0
31.5
38.0
bending radius
90||tt| |115
140
180
Bend test C2.1 device under C2 low temperature (-25±3℃) condition
The test device is shown in Figure C1.
Nominal inner diameter
50.0
63.0
76.0
101.5
Bending radius
215
230
230
345
mm
Torque wheel: The diameter of the torque wheel is twice the bending radius of the hose (according to table C1), and the wheel is equipped with a A suitable device for bending the hose around the wheel while maintaining the tangential direction, and having a strain gauge and a chart recorder for measuring torque (accuracy ± 3%). Refrigerant container: This container is equipped with a stirrer, a temperature measuring device and a hose guide roller with a diameter of 50mm. The refrigerant can be methanol or ethanol plus crushed dry ice, or a gas medium can be used as the refrigerant, but the test results should be consistent with those when using a liquid medium as the refrigerant.
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