Some standard content:
ICS 23. 100. 40
National Standard of the People's Republic of China
GB/T 5861—2003/ISO 7241-2:2000 replaces GB/T5861-1986
Hydraulic quick action couplings
Test methods
Hydraulic fluid power--Quick action couplings--Test methods
(ISO 7241-2:2000, IDT)
Issued on November 10, 2003
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
Implementation on June 1, 2004
This standard is equivalent to ISO7241-2:2000 "Test methods for hydraulic quick action couplings". GB/T 5861—2003/IS0 7241-2:2000 This standard is a revision of GB/T5861-1986 "Test Methods for Hydraulic Quick-Change Joints". The main changes of this standard compared with GB/T5861-1986 are as follows: the contents of the relevant chapters in the original standard have been modified according to ISO7241-2; the test contents such as rotary pulse have been added.
Appendix A of this standard is a normative appendix. This standard replaces GB/T5861-1986 from the date of implementation. This standard is proposed by the China Machinery Industry Federation. This standard is under the jurisdiction of the National Technical Committee for Standardization of Pipeline Accessories. The drafting units of this standard are: Mechanical Science Research Institute, Henan Jiaozuo Lutong Hydraulic Accessories Co., Ltd., and Haiyan Pipe Fittings Manufacturing Co., Ltd. The main drafters of this standard are: Chen Lin, Tao Mei, and Geng Zhixue. The previous versions of the standards replaced by this standard are: -GB/T5861—1986.
1 Scope
GB/T 5861—2003/ISO 7241-2:2000 Test methods for hydraulic quick-change connectors
This standard specifies various test methods for hydraulic quick-change connectors. This standard applies to male and female connectors, complete connectors, connectors with and without sealing devices when the connectors are disconnected, and connectors that connect and disconnect pipelines by linear motion and (or) rotational motion. 2 Normative references
The clauses in the following documents become clauses of this standard through reference in this standard. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version shall apply to this standard. GB/T2351 Outer diameter of rigid pipes and inner diameter of hoses for hydraulic and pneumatic systems (neqISO4397) GB/T3141 ISO viscosity classification of industrial liquid lubricants (eqvISO3448) GB/T5568-1994 Unflexed hydraulic pulse test for rubber and plastic hoses and hose assemblies (neqISO/DIS6803) GB/T5860 Dimensions and requirements of hydraulic quick-change couplings (GB/T5860—2003, ISO7241-1:1987 Hydraulic fluid power-Quick action couplings-Part 1:Dimensions and requirements, IDT) GB/T17446 Terminology of fluid power systems and components (idtISO5598) 3 Terms and definitions
This standard adopts the terms and definitions specified in GB/T17446. 3.1
Method for indicating connector specifications
The connector specification marking adopts the marking of the nominal inner diameter of the hose specified in GB/T2351. 4 Selection and inspection of test pieces
The selected connector assembly should select representative test pieces in each batch in terms of structure type, material, surface treatment, process, etc. 5 Test device
5.1 The test device shown in Figures 1 to 7 should be used. 5.2 The test accuracy of the test device used should meet the requirements of Chapter 22. 6 Test conditions
6.1 Unless otherwise specified, the test environment temperature should be 20℃~35℃. 6.2 The test oil viscosity should be ISO viscosity grade 32 specified in GB/T3141 (i.e., the viscosity at 40℃ is 28.8mm2/s~35.3mm2/s).
7 Connection force test
7.1 Lubricate the joint surface with the test fluid, install the joint assembly into the test device, and maintain the internal pressure, that is, maintain the maximum internal pressure value recommended for hand connection as specified in GB/T5860. 7.2 Apply axial force and (or) torque to the female (male) joint until the joint is fully engaged. 1
GB/T5861--2003/IS07241-2:20007.3 Measure the connection force and (or) torque (where appropriate). 7.4 Repeat the test five times on the same test joint. Take the average value of the five measured connection forces or torques. Record the average connection force or torque in the test report.
7.5 Record the damage or failure of the joint in the test report. 8 Opening force test
8.1 Lubricate the joint surface with the test fluid, install the joint assembly into the test device, and maintain the internal pressure (i.e. the internal pressure specified in GB/T5860) and (or) the flow state.
8.2 Apply axial force and (or) torque to the joint locking mechanism until the joint is disengaged. Measure the opening force and (or) torque8.3 Repeat the test five times on the same test joint. Take the average of the opening force and (or) torque measured five times. Record the average opening force and (or) torque in the test report.
8.4 Record the joint damage or failure in the test report. 9 Leakage test
9.1 Leakage test of joint connection under low pressure
9.1.1 Install the joint assembly into the test device. Fill the test device with the test fluid (see 6.2) to a liquid column height of 750mm. At a distance of 10D from the axis of the measuring rod of the locking device, apply a 50N load perpendicular to the center line of the connector, see Figure 1. D is equal to the nominal inner diameter of the hose in GB/T2351.
D-nominal diameter of the connector, mm;
Transparent round tube with measuring scale;
Male connector;
Steel rod connected to the male connector, not fixed in the clamp; Clamp for fixing the female connector;
Female connector;
-50N load perpendicular to the center line of the connector
-center line of the locking device;
c-—height of the liquid column.
Figure 1 Low-pressure leakage test device (when the connector is connected) 2
GB/T5861-2003/IS07241-2:20009.1.2Measure the height of the cylindrical liquid level drop within a test time of not less than 30min. Calculate the leakage (in mL/h). 9.1.3 Record the leakage in the test report. 9.2 Leakage test of disconnected joints under low pressure (only for valves) 9.2.1 Install the female (male) joint into the test device. Fill the test device with the test liquid (see 6.2) to a liquid column height of 750 mm (see Figure 2).
9.2.2 Measure the height of the cylinder liquid level drop within a test time of not less than 30 minutes. Calculate the leakage (in ml./h). 9.2.3 Record the leakage in the test report. b
Transparent cylindrical tube with measuring scale
2—Half joint (male or female joint) test element; a--—Liquid column height;
b--Top parallel port.
Figure 2 Low-pressure leakage test device (when the joint is disconnected) 9.3 Leakage test of joint connection under maximum working pressure 9.3.1 Clear the air inside the circuit. Pressurize the joint assembly with the test liquid to the maximum working pressure specified in GB/T5860.
9.3.2 Maintain the maximum working pressure for a test time of not less than 30 minutes and observe the leakage. Collect and measure the leakage with a graduated measuring cup. Calculate the leakage (in mL/s). 9.3.3 Record the leakage in the test report. 9.4 Leakage test of disconnected joints at maximum working pressure (only for valved ones) 9.4.1 Clear the air inside the circuit. Pressurize the female (male) joint with the test liquid to the female (male) joint to the maximum working pressure specified in GB/T5860.
9.4.2 Maintain the maximum working pressure for a test time of not less than 30 minutes and observe the leakage. Collect and measure the leakage of the female (male) joint with a graduated measuring bottle. Calculate the leakage (in mL/s). 9.4.3 Record the leakage in the test report. 3
GB/T5861—2003/ISO7241-2:200010 Extreme temperature test
10.1 Test of joint connection when the maximum working temperature is reduced to ambient temperature 10.1.1 Fill the joint assembly with test fluid and allow it to reach the maximum working temperature for more than 6 hours. During the temperature adjustment period, the air inside the joint assembly must be discharged to the atmosphere.
10.1.2 Allow the joint assembly to cool to ambient temperature. Disconnect the joint and reconnect the joint. Measure the leakage according to the test methods of 9.1 and 9.3. 10.1.3 Record the leakage in the test report. 10.2 Joint disconnection test when the maximum working temperature is reduced to ambient temperature (only for joints with valves) 10.2.1 Fill the female and male joints with test fluid and allow them to reach the maximum working temperature for more than 6 hours. 10.2.2 Allow the female (male) joint to cool to ambient temperature and push the valve five times by hand to separate the valve seal from the sealing surface. Measure the leakage according to the test methods of 9.2 and 9.4.
10.2.3 Record the leakage in the test report. 10.3 Test of joint connection under operation at maximum operating temperature 10.3.1 Fill the joint assembly with test fluid and allow it to reach the maximum operating temperature for more than 6 hours. During the temperature adjustment period, the air inside the joint assembly should be exhausted to the atmosphere.
10.3.2 Measure the leakage according to the test methods of 9.1 and 9.3. 10.3.3 Record the leakage in the test report. 10.4 Joint disconnection test under operation at maximum operating temperature (only for joints with valves) 10.4.1 Fill the female and male joints with test fluid and allow them to reach the maximum operating temperature for more than 6 hours respectively. 10.4.2 Measure the leakage at the highest temperature according to the test methods of 9.2 and 9.4. 10.4.3 Record the leakage in the test report. 10.5 Joint connection test at minimum operating temperature 10.5.1 Fill the joint assembly with test fluid and allow it to reach the minimum operating temperature for more than 4 hours. 10.5.2 Measure the leakage at the minimum temperature according to the test methods of 9.1 and 9.3. 10.5.3 Record the leakage in the test report. 10.6 Disconnection test of joints at minimum operating temperature (only for joints with valves) 10.6.1 Fill the male and female joints with the test fluid and make them reach the minimum operating temperature for more than 4 hours. 10.6.2 Push the valve five times by hand to separate the valve seal from the sealing surface. Measure the leakage at the minimum operating temperature according to the test methods of 9.2 and 9.4.
10.6.3 Record the leakage in the test report. 11 Pressure pulse test
11.1 Test joints
Since the pressure pulse test is a destructive test, the joints after the test should not be subjected to other tests. 11.2 Pressure pulse test of joint connection
11.2.1 Connect the joint assembly to a test device capable of generating pressure pulses, as shown in Figure 3 of GB/T5568-1994, which graphically shows the pressure pulse cycle. Adjust the test pressure to 133% of the rated pressure. 11.2.2 Adjust the test device so that the pressure-time cycle corresponding to the curve is within the shaded area shown in Figure 3 of GB/T5568-1994.
11.2.3 Carry out the specified number of pulse test cycles at a uniform frequency of 0.5 Hz to 1 Hz. 11.2.4 Disconnect and connect the test joint assembly at least once at intervals of 10,000 cycles during the entire test. 11.2.5 Record any signs of seizure or failure. 11.2.6 Determine the leakage according to the test methods 9.1 and 9.3. 4
11.2.7 Record the leakage and the number of test cycles in the test report. 11.3 Pressure pulse test of disconnected joints (for valves only) GB/T 5861-2003/ISO 7241-2:200011.3.1 Connect the male and female joints to a test device capable of generating pressure pulses as shown in Figure 3 of GB/T5568-1994. 11.3.2 Adjust the test device so that the pressure-time cycle that matches the curve is within the shaded area shown in Figure 3 of GB/T5568-1994.
11.3.3 Carry out the specified number of pressure pulse cycle tests. 11.3.4 Determine the leakage according to the test methods in 9.2 and 9.4. 11.3.5 Record the leakage and the number of test cycles in the test report. 12 Rotary pulse test
12.1 Since the rotary pulse test is a destructive test, a new joint should be used and no other tests should be performed on the joint after the test. 12.2 Connect the joint assembly to a test device that can produce a pressure pulse as shown in Figure 3 of GB/T5568-1994. Adjust the test device so that the pressure-time cycle that matches the curve is within the shaded area shown in this figure. 12.3 Install the connector in a test fixture and rotate the male connector relative to the female connector at least 5° between each pressure pulse cycle when the pressure is less than 1000 kPa (10 bar).
12.4 Perform the pulse test cycle for the specified number of times at a uniform frequency of 0.5 Hz to 1 Hz. 12.5 Disconnect and connect the test connector at least once at the specified intervals during the test. 12.6 Record any signs of bite.
12.7 Determine the leakage according to the test methods in 9.1 and 9.3. 12.8 Record the leakage and the number of test cycles in the test report. 13 Endurance Test
13.1 Since the endurance test is a destructive test, a new connector should be used and the connector should not be subjected to other tests after the test. 13.2 Connect the connector assembly to a pressure source that can provide an internal pressure of 100 kPa (1 bar) (compressed air with lubricant can also be used). 13.3 Connect and disconnect the assembly for the specified number of cycles. For fitting assemblies used for hoses with a nominal inside diameter less than or equal to 12.5 mm, the frequency of connection and disconnection shall not exceed 1800 times per hour; for fitting assemblies used for hoses with a nominal inside diameter greater than 12.5 mm, the frequency of connection and disconnection shall not exceed 600 times per hour.
13.4 Record any signs of bite or malfunction. 13.5 Determine the leakage rate according to the leakage test method in Chapter 9. 13.6 Record the leakage rate in the test report. Pressure Drop Test
14.1 Install the fitting assembly in the test device as shown in Figure 3. Select 25% to 150% of the rated flow rate and at least six test flow rates (which must include 100% of the rated flow rate). If the fitting does not specify a rated flow rate, use the values specified in Table 1. 14.2 Measure and record the pressure drop in both the forward and reverse directions of the fitting assembly at the selected test flow rate. 14.3 Remove the joint assembly from the test apparatus and install a pipe of the appropriate specification and fitting, selected in accordance with 14.1, and measure and record the pressure drop at the same test flow rate.
14.4 During the entire pressure drop test, the test oil viscosity is maintained at 28.8mm2/s~35.2mm2/s. Record the oil type and temperature. 14.5 The difference between the pressure drop measured in accordance with 14.2 and the pressure drop measured in accordance with 14.3 is the net pressure drop of the joint assembly. Plot the pressure drop curve on coordinate paper for each flow direction (it is recommended to use full logarithmic coordinate paper so that a straight line is obtained. The line may not pass through some points. But it should represent the average value between these points). 14.6 If, at any flow rate, the pressure drop value through the joint assembly in one direction is 10% less than the pressure drop value through the joint assembly in the other direction, the larger of the two values is used. 5
GB/T5861—2003/ISO7241-2:2000L=10 times the diameter of the joint pipe or the pipeline diameter; L2=5 times the diameter of the joint pipe or the pipeline diameter; L2 joint plus end fittings,
La=10 times the diameter of the joint pipe or the pipeline diameter, L,-5 times the diameter of the joint pipe or the pipeline diameter; Dimensions L~Ls are the minimum lengths;
test piece;
pressure measurement point;
-connected to the differential pressure measuring device;
control the liquid supply.
Nominal diameter of connector
(Nominal inner diameter of hose)/
Vacuum test
15.1 Vacuum test of connector connection
Figure 3 Pressure drop test circuit
Table 1 Standard rated flow
15.1.1 Install the connector assembly in the test device as shown in Figure 4. 15.1.2 Apply a lateral load to the connector assembly as shown in Figure 4. 15.1.3 Start the vacuum pump and make the vacuum degree reach the specified value. 6
Rated flow/
D--Nominal diameter of connector, mm
L=15Dmax
--Clamp for fixing female connector;
2--Test connector assembly or female and male connectors;3--Male connector,
--Steel rod connected to male connector and not fixed in the fixture;5--Female connector;
6--Pressure gauge 1
--Connect to vacuum pump;
8--Valve;
--50N load perpendicular to the center line of connector (only applicable to connector connection test);b---Center line of locking device.
Figure 4 Vacuum test system
15.1.4 Close the valve and allow it to stabilize for 10 minutes. 15.1.5 Observe the value of the vacuum gauge dropping. 15.1.6 Record the vacuum gauge reading in the test report. 15.2 Vacuum test of disconnected joints (only for those with valves) 15.2.1 Install the male and female joints into the test device respectively as shown in Figure 4. 15.2.2 Start the vacuum pump and make the vacuum reach the specified value. 15.2.3 Close the valve and allow it to stabilize for 10 minutes. 15.2.4 Observe the value of the vacuum gauge dropping. 15.2.5 Record the vacuum gauge reading in the test report. 16 Air inclusion test
GB/T 5861—2003/IS0 7241-2:200016.1 Install the joint assembly into the test device as shown in Figure 5. Record the liquid level of the closed measuring cylinder and the open container. The two liquid levels should be consistent. 16.2 Disconnect and connect the joint assembly (discharge the leaked liquid after the joint is disconnected). After each disconnection and connection cycle, tap the connector assembly gently to remove all bubbles inside it.
16.3 Repeat the steps specified in 16.2 until the liquid level in the measuring cylinder drops by 10 scale marks. With the connector connected, adjust the top open container vertically to make the liquid levels consistent. Record the liquid level in the measuring cylinder. GB/T 5861--2003/ISO 7241-2:2000 Top open container containing liquid;
Male connector,
-Female connector;
-Closed measuring container containing test liquid; When taking readings, the liquid levels must be consistent;
-If bubbles appear in this container, the test should be repeated because air will accumulate in the connector;-Necessary device to prevent the male connector from suddenly dropping below 250mm/min; The difference in air entrapment represents the total air inclusion. Figure 5 Air Content Test Apparatus
16.4 Subtract the liquid level value recorded in 16.3 from the liquid level value recorded in 16.1 and divide by the number of disconnection and connection cycles to obtain the value of the air content for each disconnection and connection cycle. 16.5 Record the value of the air content for each disconnection and connection cycle (in mL) in the test report. 17 Leakage Test
17.1 Install the joint assembly into the test apparatus as shown in Figure 6 and maintain a liquid pressure of 100 kPa (1 bar). Record the liquid level in the gauge.
17.2 Connect and disconnect the joint assembly. Allow the leaking liquid to drain from the joint assembly after each disconnection. Gently tap the joint assembly after each connection to remove all bubbles inside it.
17.3 Repeat the steps specified in 17.2 until the liquid level in the gauge drops to at least 10 scale marks. Record the liquid level in the gauge. 17.4 Subtract the liquid level recorded in 17.3 from the liquid level recorded in 17.1 and divide by the number of connection and disconnection cycles to obtain the leakage for each connection and disconnection cycle.
17.5 Record the leakage for each connection and disconnection cycle (in mL) in the test report. Note: If the viscosity of the standard test liquid prevents the rapid removal of bubbles, a low-viscosity liquid may be used. If a substitute liquid is used, the type of liquid should be recorded. 8
—A measuring container filled with the test liquid; 1
Y-shaped pipe fitting;
3——Rigid pipe;
4——PTFE tube (as short as possible), 5——Male connector;
6——Female connector;
-100 kPa (1 bar) air pressure.
18 Static pressure test
18.1 Static pressure test of joint connection
Figure 6 Leakage test device
GB/T 5861—2003/ISO 7241-2:200018.1.1 Pressurize the joint assembly to the specified static pressure and maintain the pressure for not less than 5 minutes. 18.1.2 Determine the leakage according to the test methods of 9.1 and 9.3. 18.1.3 Connect and disconnect the joint assembly five times under zero pressure conditions. 18.1.4 Record any signs of bite or malfunction. 18.1.5 Record the leakage in the test report. 18.2 Static pressure test of joint disconnection (for joints with valves only)18.2.1 Pressurize the male and female joints to the specified static pressure and maintain the pressure for not less than 5 minutes. 18.2.2 Determine the leakage according to the test methods of 9.2 and 9.4. 18.2.3
Record any signs of seizure or malfunction. 18.2.4 Record the amount of leakage in the test report. 19 Long duration flow shock test
19.1 Test the joint assembly for leakage as in the test method of Chapter 9. 19.2 Test the joint assembly for pressure drop as in the test method of Chapter 14. 19.3 Subject the joint assembly to a specified flow shock for a minimum of 5 seconds in each direction. If the flow shock is not specified, use a flow value of 5 times the rated flow of the joint assembly. If the rated flow is not specified, use the relevant rated flow value specified in Table 1.
19.4 Record the flow value for a total of 100 cycles. This test may be accomplished by running 100 cycles in one direction followed by 100 cycles in the other direction.
19.5 Test the joint assembly for leakage as in the test method of Chapter 9. 19.6 Test the pressure drop of the joint assembly in accordance with the test method of Chapter 14. 19.7 Record the following results in the test report: Leakage before and after the shock cycle test; - Pressure drop before and after the shock cycle test; - Visual observation of damage caused by the shock cycle test. 20 Short-Duration Shock Flow Test
Warning: This method involves high fluid velocities. Precautions should be taken in the assembly method, test method, and equipment used to avoid hazards to operators and damage to equipment. 20.1 Test the joint assembly for leakage in accordance with the test method of Chapter 9. 20.2 Test the pressure drop of the joint assembly in accordance with the test method of Chapter 14. 20.3 Determine the shock test pressure by adding 25 pressure drops (at rated flow) in the case specified in the test method of 14.1. Note: If the rated flow is not specified, use the rated flow specified in Table 1 relative to the joint size. 20.4 Install the joint in the test circuit as shown in Figure 3. The flow meter can be removed from the circuit. 20.5 Adjust the fluid supply to meet the release characteristic curve in accordance with the pressure-time curve shown in Figure 7. The pressure difference between the upper and lower pressure measurement points shall be equal to the test pressure obtained in 20.3. One fluid release is equal to one cycle. Include the current pressure-time curve annex in the test report. %
Figure 7 Impact Flow Test Pressure-Time Curve 20.6 Perform 100 cycles.
20.7 Reverse the joints in the test system. Adjust the fluid release curve to meet the requirements of 20.3 and 20.5 (if necessary). When the pressure drop measured after the joint is reversed is 10% greater than the pressure drop measured with the joint in its original position, adjustment is necessary.
20.8 Perform 100 cycles in this flow direction. 20.9 Test the joint for leakage as in Test 9. 20.10 Test the joint for pressure drop as in Test 14. 20.11 Record the following test results in the test report: - Leakage before and after the impulse cycle test; - Pressure drop before and after the impulse cycle test; Visual observation of damage caused by the impulse cycle test. 21 Burst test
21.1 Safety measures
When conducting a burst test, appropriate protective measures should be provided for the operator. Before conducting a burst test, 102000Open-top container containing liquid;
male connector,
female connector;
-Closed measuring container containing test liquid;The liquid level must be consistent when taking readings;
-If bubbles appear in this container, the test should be repeated because air will accumulate in the connector;-Necessary device to prevent the male connector from suddenly dropping below 250 mm/min;The difference in air entrapment represents the total air inclusion. Figure 5 Air content test device
16.4Subtract the liquid level recorded in 16.3 from the liquid level recorded in 16.1 and divide it by the number of disconnection and connection cycles to obtain the air content value for each disconnection and connection cycle. 16.5Record the air content value (in mL) for each disconnection and connection cycle in the test report. 17 Leakage Test
17.1 Install the connector assembly into the test apparatus as shown in Figure 6 and maintain a liquid pressure of 100 kPa (1 bar). Record the liquid level in the gauge.
17.2 Connect and disconnect the connector assembly. Allow the leaking liquid to drain from the connector assembly after each disconnection. Gently tap the connector assembly after each connection to remove all bubbles inside it.
17.3 Repeat the steps specified in 17.2 until the liquid level in the gauge drops to at least 10 scale marks. Record the liquid level in the gauge. 17.4 Subtract the liquid level recorded in 17.3 from the liquid level recorded in 17.1 and divide by the number of connection and disconnection cycles to obtain the leakage for each connection and disconnection cycle.
17.5 Record the leakage for each connection and disconnection cycle (in mL) in the test report. Note: If the viscosity of the standard test fluid prevents rapid removal of bubbles, a low-viscosity liquid may be used. If a substitute liquid is used, the type of liquid should be recorded. 8
—A measuring container filled with the test liquid; 1
Y-shaped pipe fitting;
3——Rigid pipe;
4——PTFE pipe (as short as possible), 5——Male connector;
6——Female connector;
-100 kPa (1 bar) air pressure.
18 Static pressure test
18.1 Static pressure test of joint connection
Figure 6 Leakage test device
GB/T 5861—2003/ISO 7241-2:200018.1.1 Pressurize the joint assembly to the specified static pressure, and maintain the pressure for not less than 5 minutes. 18.1.2 Determine the leakage according to the test methods in 9.1 and 9.3. 18.1.3 Connect and disconnect the joint assembly five times under zero pressure conditions. 18.1.4 Record any signs of seizure or malfunction. 18.1.5 Record the amount of leakage in the test report. 18.2 Disconnection static pressure test (for valved connectors only) 18.2.1 Pressurize the male and female connectors to the specified static pressure and maintain the pressure for not less than 5 minutes. 18.2.2 Determine the amount of leakage in accordance with the test methods of 9.2 and 9.4. 18.2.3
Record any signs of seizure or malfunction. 18.2.4 Record the amount of leakage in the test report. 19 Long duration impact flow test
19.1 Test the leakage of the connector assembly in accordance with the test method of Chapter 9. 19.2 Test the pressure drop of the connector assembly in accordance with the test method of Chapter 14. 19.3 Subject the connector assembly to the specified impact flow in each direction for a minimum of 5 seconds. If the impact flow is not specified, use a flow value of 5 times the rated flow of the connector assembly. If the rated flow is not specified, use the relevant rated flow value specified in Table 1.
19.4 Record the flow rate values for a total of 100 cycles. This test can be achieved by running 100 cycles in one direction, followed by 100 cycles in the other direction.
19.5 Test the joint assembly for leakage according to the test method in Chapter 9. 19.6 Test the joint assembly for pressure drop according to the test method in Chapter 14. 19.7 Record the following results in the test report: leakage before and after the shock cycle test; - pressure drop before and after the shock cycle test; - visual observation of damage caused by the shock cycle test. 20 Short-duration shock flow test
Warning: This method involves high fluid velocities. Precautions should be taken in the assembly method, test method and equipment used to avoid hazards to operators and damage to equipment. 20.1 Test the joint assembly for leakage according to the test method in Chapter 9. 20.2 Test the pressure drop of the fitting assembly in accordance with the test method of Chapter 14. 20.3 Determine the impulse test pressure by adding 25 pressure drops (at rated flow) in the case specified in the test method of 14.1. NOTE: If the rated flow is not specified, use the rated flow specified in Table 1 relative to the fitting size. 20.4 Install the fitting in the test circuit as shown in Figure 3. The flow meter may be removed from the circuit. 20.5 Adjust the fluid supply to provide a release characteristic curve that conforms to the pressure-time curve shown in Figure 7. The pressure difference between the upper and lower pressure measurement points shall be equal to the test pressure obtained in 20.3. One release of fluid equals one cycle. Include the current pressure-time curve annex in the test report. %
Figure 7 Pressure-time curve for impulse flow test 20.6 Perform 100 cycles.
20.7 Reverse the fitting in the test system. Adjust the fluid release curve to meet the requirements of 20.3 and 20.5 (if necessary). When the pressure drop value measured after the joint is reversed is 10% greater than the pressure drop value measured when the joint is in its original position, adjustment is necessary.
20.8 Perform 100 cycles in this flow direction. 20.9 Test the joint for leakage according to the test method in Chapter 9. 20.10 Test the joint for pressure drop according to the test method in Chapter 14. 20.11 Record the following test results in the test report: - Leakage before and after the impulse cycle test; - Pressure drop before and after the impulse cycle test; Visual observation of damage caused by the impulse cycle test. 21 Burst test
21.1 Safety measures
When conducting a burst test, provide appropriate protection for the operator. Before conducting a burst test, 102000Open-top container containing liquid;
male connector,
female connector;
-Closed measuring container containing test liquid;The liquid level must be consistent when taking readings;
-If bubbles appear in this container, the test should be repeated because air will accumulate in the connector;-Necessary device to prevent the male connector from suddenly dropping below 250 mm/min;The difference in air entrapment represents the total air inclusion. Figure 5 Air content test device
16.4Subtract the liquid level recorded in 16.3 from the liquid level recorded in 16.1 and divide it by the number of disconnection and connection cycles to obtain the air content value for each disconnection and connection cycle. 16.5Record the air content value (in mL) for each disconnection and connection cycle in the test report. 17 Leakage Test
17.1 Install the connector assembly into the test apparatus as shown in Figure 6 and maintain a liquid pressure of 100 kPa (1 bar). Record the liquid level in the gauge.
17.2 Connect and disconnect the connector assembly. Allow the leaking liquid to drain from the connector assembly after each disconnection. Gently tap the connector assembly after each connection to remove all bubbles inside it.
17.3 Repeat the steps specified in 17.2 until the liquid level in the gauge drops to at least 10 scale marks. Record the liquid level in the gauge. 17.4 Subtract the liquid level recorded in 17.3 from the liquid level recorded in 17.1 and divide by the number of connection and disconnection cycles to obtain the leakage for each connection and disconnection cycle.
17.5 Record the leakage for each connection and disconnection cycle (in mL) in the test report. Note: If the viscosity of the standard test fluid prevents rapid removal of bubbles, a low-viscosity liquid may be used. If a substitute liquid is used, the type of liquid should be recorded. 8
—A measuring container filled with the test liquid; 1
Y-shaped pipe fitting;
3——Rigid pipe;
4——PTFE pipe (as short as possible), 5——Male connector;
6——Female connector;
-100 kPa (1 bar) air pressure.
18 Static pressure test
18.1 Static pressure test of joint connection
Figure 6 Leakage test device
GB/T 5861—2003/ISO 7241-2:200018.1.1 Pressurize the joint assembly to the specified static pressure, and maintain the pressure for not less than 5 minutes. 18.1.2 Determine the leakage according to the test methods in 9.1 and 9.3. 18.1.3 Connect and disconnect the joint assembly five times under zero pressure conditions. 18.1.4 Record any signs of seizure or malfunction. 18.1.5 Record the amount of leakage in the test report. 18.2 Disconnection static pressure test (for valved connectors only) 18.2.1 Pressurize the male and female connectors to the specified static pressure and maintain the pressure for not less than 5 minutes. 18.2.2 Determine the amount of leakage in accordance with the test methods of 9.2 and 9.4. 18.2.3
Record any signs of seizure or malfunction. 18.2.4 Record the amount of leakage in the test report. 19 Long duration impact flow test
19.1 Test the leakage of the connector assembly in accordance with the test method of Chapter 9. 19.2 Test the pressure drop of the connector assembly in accordance with the test method of Chapter 14. 19.3 Subject the connector assembly to the specified impact flow in each direction for a minimum of 5 seconds. If the impact flow is not specified, use a flow value of 5 times the rated flow of the connector assembly. If the rated flow is not specified, use the relevant rated flow value specified in Table 1.
19.4 Record the flow rate values for a total of 100 cycles. This test can be achieved by running 100 cycles in one direction, followed by 100 cycles in the other direction.
19.5 Test the joint assembly for leakage according to the test method in Chapter 9. 19.6 Test the joint assembly for pressure drop according to the test method in Chapter 14. 19.7 Record the following results in the test report: leakage before and after the shock cycle test; - pressure drop before and after the shock cycle test; - visual observation of damage caused by the shock cycle test. 20 Short-duration shock flow test
Warning: This method involves high fluid velocities. Precautions should be taken in the assembly method, test method and equipment used to avoid hazards to operators and damage to equipment. 20.1 Test the joint assembly for leakage according to the test method in Chapter 9. 20.2 Test the pressure drop of the fitting assembly in accordance with the test method of Chapter 14. 20.3 Determine the impulse test pressure by adding 25 pressure drops (at rated flow) in the case specified in the test method of 14.1. NOTE: If the rated flow is not specified, use the rated flow specified in Table 1 relative to the fitting size. 20.4 Install the fitting in the test circuit as shown in Figure 3. The flow meter may be removed from the circuit. 20.5 Adjust the fluid supply to provide a release characteristic curve that conforms to the pressure-time curve shown in Figure 7. The pressure difference between the upper and lower pressure measurement points shall be equal to the test pressure obtained in 20.3. One release of fluid equals one cycle. Include the current pressure-time curve annex in the test report. %
Figure 7 Pressure-time curve for impulse flow test 20.6 Perform 100 cycles.
20.7 Reverse the fitting in the test system. Adjust the fluid release curve to meet the requirements of 20.3 and 20.5 (if necessary). When the pressure drop value measured after the joint is reversed is 10% greater than the pressure drop value measured when the joint is in its original position, adjustment is necessary.
20.8 Perform 100 cycles in this flow direction. 20.9 Test the joint for leakage according to the test method in Chapter 9. 20.10 Test the joint for pressure drop according to the test method in Chapter 14. 20.11 Record the following test results in the test report: - Leakage before and after the impulse cycle test; - Pressure drop before and after the impulse cycle test; Visual observation of damage caused by the impulse cycle test. 21 Burst test
21.1 Safety measures
When conducting a burst test, provide appropriate protection for the operator. Before conducting a burst test, 103 Connect and disconnect the fitting assembly five times under zero pressure conditions. 18.1.4 Record any signs of seizure or malfunction. 18.1.5 Record the amount of leakage in the test report. 18.2 Static Pressure Test of Fitting Disconnection (For Fittings with Valves Only) 18.2.1 Pressurize the male and female fittings to the specified static pressure and maintain the pressure for not less than 5 minutes. 18.2.2 Determine the amount of leakage in accordance with the test methods of 9.2 and 9.4. 18.2.3
Record any signs of seizure or malfunction. 18.2.4 Record the amount of leakage in the test report. 19 Long Duration Impact Flow Test
19.1 Test the fitting assembly for leakage in accordance with the test method of Chapter 9. 19.2 Test the pressure drop of the fitting assembly in accordance with the test method of Chapter 14. 19.3 Subject the fitting assembly to the specified impact flow in each direction for a minimum of 5 seconds. If the impact flow is not specified, use a flow value of 5 times the rated flow of the fitting assembly. If the rated flow is not specified, the relevant rated flow value specified in Table 1 shall be used.
19.4 Record the flow value for a total of 100 cycles. This test may be accomplished by running 100 cycles in one direction followed by 100 cycles in the other direction.
19.5 Test the joint assembly for leakage in accordance with the test method of Chapter 9. 19.6 Test the joint assembly for pressure drop in accordance with the test method of Chapter 14. 19.7 Record the following results in the test report: - Leakage before and after the shock cycle test; - Pressure drop before and after the shock cycle test; - Visual observation of damage caused by the shock cycle test. 20 Short duration shock flow test
Warning: This method involves high fluid velocities. Precautions should be taken in the assembly method, test method and equipment used to avoid hazards to operators and damage to equipment. 20.1 Test the fitting assembly for leakage as in Section 9. 20.2 Test the fitting assembly for pressure drop as in Section 14. 20.3 Determine the impulse test pressure by adding 25 pressure drops (at rated flow) in the conditions specified in Section 14.1. NOTE: If rated flow is not specified, use the rated flow relative to the fitting size specified in Table 1. 20.4 Install the fitting in the test circuit as shown in Figure 3. The flow meter may be removed from the circuit. 20.5 Adjust the fluid supply to provide a release characteristic curve that conforms to the pressure-time curve shown in Figure 7. The pressure difference between the upper and lower pressure measurement points shall be equal to the test pressure obtained in 20.3. One release of fluid equals one cycle. Include the current pressure-time curve annex in the test report. %
Figure 7 Pressure-time curve for impulse flow test 20.6 Perform 100 cycles.
20.7 Reverse the position of the fitting in the test system. Adjust the oil release curve to meet the requirements of 20.3 and 20.5 (if necessary). When the pressure drop value measured after the joint is reversed is 10% greater than the pressure drop value measured when the joint is in its original position, adjustment is necessary.
20.8 Perform 100 cycles in this flow direction. 20.9 Test the joint for leakage according to the test method in Chapter 9. 20.10 Test the joint for pressure drop according to the test method in Chapter 14. 20.11 Record the following test results in the test report: - Leakage before and after the impulse cycle test; - Pressure drop before and after the impulse cycle test; Visual observation of damage caused by the impulse cycle test. 21 Burst test
21.1 Safety measures
When performing a burst test, provide appropriate protection for the operator. Before performing a burst test, 103 Connect and disconnect the fitting assembly five times under zero pressure conditions. 18.1.4 Record any signs of seizure or malfunction. 18.1.5 Record the amount of leakage in the test report. 18.2 Static Pressure Test of Fitting Disconnection (For Fittings with Valves Only) 18.2.1 Pressurize the male and female fittings to the specified static pressure and maintain the pressure for not less than 5 minutes. 18.2.2 Determine the amount of leakage in accordance with the test methods of 9.2 and 9.4. 18.2.3
Record any signs of seizure or malfunction. 18.2.4 Record the amount of leakage in the test report. 19 Long Duration Impact Flow Test
19.1 Test the fitting assembly for leakage in accordance with the test method of Chapter 9. 19.2 Test the pressure drop of the fitting assembly in accordance with the test method of Chapter 14. 19.3 Subject the fitting assembly to the specified impact flow in each direction for a minimum of 5 seconds. If the impact flow is not specified, use a flow value of 5 times the rated flow of the fitting assembly. If the rated flow is not specified, the relevant rated flow value specified in Table 1 shall be used. bzxz.net
19.4 Record the flow value for a total of 100 cycles. This test may be accomplished by running 100 cycles in one direction followed by 100 cycles in the other direction.
19.5 Test the joint assembly for leakage in accordance with the test method of Chapter 9. 19.6 Test the joint assembly for pressure drop in accordance with the test method of Chapter 14. 19.7 Record the following results in the test report: - Leakage before and after the shock cycle test; - Pressure drop before and after the shock cycle test; - Visual observation of damage caused by the shock cycle test. 20 Short duration shock flow test
Warning: This method involves high fluid velocities. Precautions should be taken in the assembly method, test method and equipment used to avoid hazards to operators and damage to equipment. 20.1 Test the fitting assembly for leakage as in Section 9. 20.2 Test the fitting assembly for pressure drop as in Section 14. 20.3 Determine the impulse test pressure by adding 25 pressure drops (at rated flow) in the conditions specified in Section 14.1. NOTE: If rated flow is not specified, use the rated flow relative to the fitting size specified in Table 1. 20.4 Install the fitting in the test circuit as shown in Figure 3. The flow meter may be removed from the circuit. 20.5 Adjust the fluid supply to provide a release characteristic curve that conforms to the pressure-time curve shown in Figure 7. The pressure difference between the upper and lower pressure measurement points shall be equal to the test pressure obtained in 20.3. One release of fluid equals one cycle. Include the current pressure-time curve annex in the test report. %
Figure 7 Pressure-time curve for impulse flow test 20.6 Perform 100 cycles.
20.7 Reverse the position of the fitting in the test system. Adjust the oil release curve to meet the requirements of 20.3 and 20.5 (if necessary). When the pressure drop value measured after the joint is reversed is 10% greater than the pressure drop value measured when the joint is in its original position, adjustment is necessary.
20.8 Perform 100 cycles in this flow direction. 20.9 Test the joint for leakage according to the test method in Chapter 9. 20.10 Test the joint for pressure drop according to the test method in Chapter 14. 20.11 Record the following test results in the test report: - Leakage before and after the impulse cycle test; - Pressure drop before and after the impulse cycle test; Visual observation of damage caused by the impulse cycle test. 21 Burst test
21.1 Safety measures
When performing a burst test, provide appropriate protection for the operator. Before performing a burst test, 10
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