【 Weak current College 】 halon fire extinguishing system container valve performance-Power By 【 China power house network 】

People's Republic of China national standard UDC 614.843.3 halon fire extinguishing system container valve performance requirements and test method GB 795 Halon fire extinguishing? 9 systems of performance requirements and test method for container valves 1 subject matter and scope of application of this standard stipulates a halon fire extinguishing systems components container valve performance requirements and test methods. This standard applies to halon 1301 and Halon 1211 fire-extinguishing system.

Terminology 2.1 maximum working pressure of the container filling fire extinguishing agent, pressurized, and placed in three temperature higher of, balanced pressure in the container. 50 ℃; the maximum use temperature; factory recommended (or require) the highest working temperature.
Filling ratio at 20 ℃, the container of the liquid halon fire extinguishing agent of volume and the volume of the container. Fire extinguishing agent
maximum filling quantities, in 1.05MPa system refers to when filling ratio of 60% of the amount of extinguishing agent for filling. 　 In 2.5 MPa systems and 4.2 MPa systems, means when filling ratio of 80% of the amount of extinguishing agent for filling. General

3.1 General requirements 3.1.1 container valve General requirements container valve is usually used to hold halon fire extinguishing agent, in case of fire up and release the halon fire extinguishing agent. Container valve design should be consistent with the halon fire extinguishing system, that is, under the system set up specific conditions such as: location, environment conditions, long-term reliable work, no malfunction and excessive leakage. Container valve should be designed to ensure that action is its components shall be sprayed out of the valve or into the Jet pipe. 3.1.2 container valve category press container valve control, the container

valve can be divided into: electric type; pneumatic type; mechanical type; the type of electric detonation.

Press fire extinguishing system control, the container

valve can be divided into: independent type; the type of valve group; master, from the dynamic type.

There are other classifications.

3.2 operating temperature limits of the container valve should fit the following operating temperature limits, from-20 ° c to 50 ° c. When the design according to the actual needs of its operating temperature exceeds this limit, it should be suitable for working temperature ranges are marked. 3.3 material valve body and its internal components available metal manufacturing, can also be used in accordance with the standards of other materials. When using other non-metallic materials, also need to develop specialized requirements and test methods. 　 Elastic gasket should be long-term and liquid or gaseous halon fire extinguishing agent contact and not damaged or deformed.

Performance requirements

4.1 strength requirements according to section 5.4.1 of test methods used 1.5 times the maximum operating pressure test, valve and its attachments shall be deformed, leakage. Request press of overpressure 4.2 5.4.2 of the test method used 3 times the maximum operating pressure test, valve and accessories shall not be broken. 4.3 sealing requirements test by 5.5 method used 1.1 times maximum working pressure test, valve and accessories for outlet should not bubble leak, or mechanical damage. 4.4 seismic requirements by 5.6 test methods on the container valve components with the container (including auxiliary control equipment) for vibration test, container valve components with the container should not result in any part of the structural damage. Net loss of extinguishing agent must be no greater than the amount of extinguishing agent filling 0.5 and its pressure loss cannot be greater than 1% of the filling pressure. After the end of the test container valve should be checked, container valve should work properly and be able to promptly and fully open. 4.5 temperature cycle leakage require each container and container components should be able to withstand the maximum and minimum working temperature cycle of change, but does not produce excessive leakage and valve operation breakdown. Test by 5.7 method of temperature cycle test leak, halon fire extinguishing agent of net weight loss shall not exceed the filling capacity of 0.5%, its pressure loss shall not exceed the filling pressure of 1.5%. Valve action nor any failure, any failure of the action, shall be sentenced to not pass the test. 4.6 minimum and maximum working pressure requirements test by 5.8 method for the minimum and maximum working pressure test, valve action should accurately and completely open quickly. 4.7 work reliability test container valve and the auxiliary control equipment by 5.9 test method to test, valve action should be flexible, accurate, and not to any failure and structural damage (valve Typ of parts not damaged). 4.8 valve local resistance loss optimized equivalent length notation media in flowing through the valve, siphon and hose connector when the local resistance losses to be designed and valve connection for pipe length equivalent to represent, and this number to be authorized by the metering.

Corrosion requirements

4.9.1 terphenyls stress corrosion requirements when testing according to section 5.11.1 method of experimental, copper alloy manufacture of valves, part shall not have the crack. 4.9.2 salt spray corrosion requirements according to section 5.11.2, test methods for salt spray corrosion test, valve parts cannot have significant corrosion damage, nor may you have a performance decrease, this test is finished then 5.5 and 5.9 test and meet 4.3 and 4.7 requirements. 4.10 impact resistance requires container valve should be able to withstand the impact of dumping, test by 5.12 method for impact resistance test,After that you should also be 5.5 and 5.9 test and meet 4.3 and 4.7 requirements.

4.11 manual operation requires manual action should not be greater than the 150N; la operating force should not be greater than 50N; means pushing operating force should not be greater than 10N; all manual displacement should be greater than 300mm.

Test method

production units should be the design drawings, process documents and this standard stipulates quantity of products submitted for testing sector.

Appearance inspection

5.1.1 all specimens of signs should be complete and in conformity with the requirements. 5.1.2 control design drawings, process documents, check the samples should be consistent with the design, machining requirements. 5.1.3 test specimens of process consistency, Visual defects without processing and mechanical damage. 5.2 in containers and container component test on the container of choice in this standard relating to containers and container component test, select the container principle is as small as possible, but cannot be less than container valve in design and practical use of the allowed minimum container, the test must also be a container valve attachments should be installed. 5.3 test preparation requirements by 5.2, while preparing the container will be delivered to the testing of each container and container component, container design for maximum amount of extinguishing agent filling filling agent and pressurized to 20 ° c the working pressure level. 5.4 strength test 5.4.1 strength test open container valve being tested, the entrance of the valve and hydraulic supply system, blocking all exports (including pressure relief device for export), to stay in a outlet exhaust valve. Slowly open hydraulic supply system, the valve air clean and then blocking the excluded reserved outlet, slow step-up to the maximum working pressure of 1.5 times, maintaining the pressure relief 5min, and check the valve. Test result shall conform to the requirements of articles 4.1. 5.4.2 overpressure test test steps to test with section 5.4.1 pressure for maximum working pressure of 3 times, after pressure relief, maintained 5min and check valves. Test result shall conform to the requirements of articles 4.2. 5.5 tightness test will be in a closed container valve inlet and the compressed air or nitrogen source, block seating all exports, upstream of the container valve immersed into the water, compressed air or nitrogen pressurized progressively to a maximum working pressure of 1.1 times, maintain 3min, observation of valve outlet has no bubble, and then it is removed from the water valve, without the pressure of the State to open the valve. Test result shall conform to the requirements of articles 4.3. 5.6 vibration test press 5.2 and 5.3 prepare a container valve and container components (including auxiliary control equipment), the component installed on the bench, to the following procedures to experiment. Test, press X, Y, Z three vertical axis vibration direction in order to change direction on the components to experiment. Program: displacement amplitude: 0.8mm; frequency: 20Hz; vibration time: 2h (each direction). After the test ends 2h on component weight and pressure measurement (measurement accuracy should be provided by 5.7) and make the valve movement, check the valve. Test result shall conform to the requirements of articles 4.4.

Temperature cycle leak test

press 5.2 and 5.3 requirements prepared a container valve and container components, measuring its weight and pressure, its weighing accuracy of ± 0.5% (or use 0.4 pressure gauge). The component should be in the following order in each place 24h temperatures. 50 ± 2 ℃;-20 ± 2 ° c; 50 ± 2 ℃;-20 ± 2 ° c; 50 ± 2 ℃;-20 ± 2 ° c; or according to the manufactory's recommended maximum and minimum working temperature for the thermal cycle leak test. After the end of the loop, drag the component over 25 ± 5 ° c of temperature storage 24d. Then once the loop test, then in 25 ± 5 ° c of temperature storage after the end of the test 24d. After the end of the experiment on the component weight, pressure measurement, and then to the component installation action body and driven valve so that it moves. Test result shall conform to the requirements of articles 4.5. Note: all of the pressure values read at the same temperature ± 1 ° c of temperature conditions. 5.8 minimum and maximum working pressure test in the test bench by installing a test container valve and its control device that is in use (if the valve is not only a work status, every State should carry out this test). With nitrogen or air to be logging container valve pressure, the pressure value for the minimum working temperature container pressure 0.5 times, and then open the valve, its actions are checked. Maximum working pressure test methods ibid., but the test pressure values are at the maximum operating temperature container pressure 1.1 times. Test results shall meet the requirements of articles 4.6.

Work reliability test

valve and discharge device with nitrogen, or pressurized air to the working pressure Pd, in temperature of 20 ± 5 ° c under the conditions of the order according to the following test to complete the cycle tests. Pd values: Halon 1211 for 1.05MPa and 2.5MPa; on halon 1301 is 2.5MPa and 4.2MPa.

Test sequence: the test pressure Pd received container valve's portal, time under 5s; start a container valve; pressure drops to 0.5MPa following; close the valve, then to the valve pressurization.

Above cycle test should be repeated 100 times, and the maximum and minimum working temperature respectively make 10 times. Container valve design typical

to damage a 　Some parts, after each iteration, the timely replacement in order to continue to experiment. 　Test result shall conform to the requirements of articles 4.7.

Container valve equivalent length of

equivalent length you can use the following methods to determine: container valve should have a siphon, when selecting a siphon should select container valve design allows the use of the elderly.

Test sequence:

As shown in Figure 1 test equipment installed; in the flow meter office building the required flow, calculation of Reynolds number and make sure it is at least 1 × 105, if less than this value, you must raise the velocity; regulating the flow so that readings stability; see Figure 1, in the test container valve on the side of a certain length on differential pressure meter or pressure sensors to record pressure drop; record velocity; Wei-him James and Hessian's empirical formula:

Calculation container valve equivalent length L: type in: L-optimized container valve of equivalent length, m; Lx-optimized container valve and the equivalent length of pipeline pilot, m; s-optimized pipeline water velocity, m/s; d the actual driver of pipe inside diameter, m; VF-optimized water specific volume, m3/kg = 0.001; μ-optimized water of dynamic viscosity, kg/m · s; P-optimized test device for pressure drop, Pa; c-optimized roughness coefficient, the galvanized pipe 120; Q-optimized water flow rate, L/min; a driver are shown in Figure 1, m; b driver are shown in Figure 1, m.

In Figure 1

corrosion test

5.11.1 terphenyls

stress corrosion test will be on the surface of the container valve the greasy dirt, filth clean, after 10.8mol/L for nitrate solution soaking 15 ~ 30s; with water (room temperature) washing; washing of the specimen after will be immersed into 0.018mol/L for nitrate mercury [Hg2 (NO3 · 2H2O) solution, the solution per 100 ml of joining 1mL 10.8mol/l nitric acid, specimen in the solution soaking 30min; with room temperature water specimen carefully wipe clean and check the samples are not lacking in crack and other corrosion.

Test result shall conform to the requirements of section 4.9.1. Note: may not make any mark on the specimen. 5.11.2

salt spray corrosion test should salt spray corrosion test in salt spray corrosion test chambers, inside temperature is 35 ± 2 ℃, spray rate 1 ~ 2mL/h (effective area for 80cm2 collector placed in the test box 24h measured average spray rate); test solution from white sodium chloride dissolved in distilled or deionized water, concentration is 50 ± 5g/L, pH value at 25 ° c to 6.5 ~ 7.2, spray the solution cannot be used again. Specimen after cleaning, to oil pollution rear suspension to test private inside the bracket that each test is only one test cycle for specimen, 240h; test is finished, the first dry 0.5 ~ 1h, clear water at 40 ° c, the last in cleaning the air drying.

Test result shall conform to the requirements of section 4.9.2.

5.12 impact test container and container valve components are filled with water, then valve with a mild steel rods. Mild steel rods should this selection, namely: when the container and container valve components when using mild steel rods support and 100% level. In this position, the bottom container component other than any other part and ground contact, and then to bottom to fulcrum, lift container component to a vertical position, then a horizontal force gradually role to the valve so that the container components without any resistance of slants and container valve on mild steel rods to impact. Test result shall conform to the requirements of articles 4.10. 5.13 manual test is a container and container valve components with nitrogen or air as the maximum working pressure of filling, the component installation manual venting device and a manual operation mechanism and the appropriate measuring device connection, operation container valve and records the most vigorous observed; observation and record the maximum operational displacement. 　 Test result shall conform to the requirements of articles 4.11.

Inspection rules

Product manufacturing unit should develop and adhere to quality control procedures to ensure that each batch of products are being identified as subject to this standard samples. Examination of the classification 6.2.1 product, type test should be carried out according to this standard stipulates all projects examined. 6.2.2 products factory inspection, should this standard be 5.1, 5.4, 5.5, 5.7, 5.9 test. Take a random sample, the test procedure and sampling quantity according to Appendix A (Amendment) regulations. Judgment

results 6.4.1 type inspection required by the standard test all qualified, the product is qualified product. This standard 5.4, 5.5, 5.7, 5.8, 5.9 sections to a non-qualified, shall be non-conforming product. 　 The remaining sections are not qualified, allow double sampling inspection, still not qualified, the product is non-conforming product. Appendix A test program to figure

(Supplement) A 1 test procedure description A 1.1 test sequence number 1 Visual inspection ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. (5.1) 2 test preparation ... ... ... ... ... ... ... ... ... ... ... ... ... .... (5.3)

strength test ... ... ... ... ... ... ... ... ... ... ... ... ... .... (5.4.1) overpressure test

Inspection ... ... ... ... ... ... ... ... ... ... ... ... ... .... (5.4.2) tightness test ... ... ... ... ... ... ... ... ... ... ... ... .... (5.5) vibration test ... ... ... ... ... ... ... ... ... ... ... ... ... .... (5.6) temperature cycle leak test ... ... ... ... ... ... ... ... ... .... (5.7) the maximum and minimum working pressure test ... ... ... ... ... ... ... (5.8) work reliability test ... ... ... ... ... ... ... ... ... ... ... (5.9) equivalent length test ... ... ... ... ... ... ... ... ... ... ... ... (5.10) terphenyls stress corrosion test ... ... ... ... ... ... ... ... (5.11.1) salt spray corrosion test ... ... ... ... ... ... ... ... ... ... ... ... (5.11.3) impact test ... ... ... ... ... ... ... ... ... ... ... ... ... ... (5.12) manual test ... ... ... ... ... ... ... ... ... ... ... ... (5.13)

A 1.2 description

above test sequence number in Figure a1 with the box number; the number in the circle to test the number of samples required.

A 2 test procedure shown in Figure A1 additional notes: this standard by People's Republic of China Ministry of public security. This standard by the Ministry of public security fire Research Institute is responsible for the drafting of Tianjin.

This standard primary drafters stone wanming, etc.