1 Subject Matter and Scope This standard specifies the performance requirements and test methods Halogen-based fire extinguishing system selection valve. This standard applies to Halon 1301 and Halon 1211 fire extinguishing system selection valve. 2 reference standard GB 795 Halon fire extinguishing system container valve performance requirements and test methods GB 4981 industrial valve pressure test 3 terms driving force: drive to open the selector valve to exert force. Maximum working pressure: The container filled with fire extinguishing agent, pressure, and placed in the following three temperatures, the higher the balance pressure in the container. a. 50 ℃; b. The highest temperature; c. Manufacturer recommended (or specified) maximum operating temperature. 4 Technical Requirements 4.1 Selection of Valve Requirements The selector valve is installed in a pipeline project mainly consisting of Halon liquid phase fire extinguishing agent and liquid phase. Its function is to protect multiple fire prevention areas with a Halon fire extinguishing system. When a fire occurs in one of the fire prevention areas Select the channel through which the extinguishing agent passes by the selector valve. The design of the selector valve shall comply with the actual requirements of the Halon fire extinguishing system under vibrating conditions and shall not cause malfunction. 4.2 Operating temperature limit The operating temperature limit of the selector valve is -20 ° C to 50 ° C. When the design operating temperature exceeds this limit according to actual requirements, the applicable operating temperature range shall be marked. 4.3 Material Selection Valves and their internal parts can be made of corrosion-resistant metal materials can also be used in line with the performance requirements of this standard non-metallic materials. However, it must be of sufficient strength to withstand the test pressures and test temperatures required by this standard. 5 Performance requirements 5.1 Intensity requirements 5.1.1 Strength test According to the test method of 6.2.1 of this standard, with 1.5 times the maximum working pressure test, the valve and its accessories shall not have deformation, leakage, cracks or damage. 5.1.2 Overpressure Requirements According to the test method of 6.2.2 of this standard with 3 times the maximum working pressure test, the valve shall not be broken. 5.2 Sealability Requirements According to the test method of 6.4 of this standard, the maximum working pressure of 1.1 times of the valve shall be tested. The outlet of the valve and its accessories shall not exceed 3.0mL / min for the leakage of water. 5.3 Working reliability test Select the valve according to 6.3 of this standard test, the valve action should be flexible, accurate and reliable, without any damage and structural damage (normal parts of the valve damage is not included). Select the valve in the reliability test carried out after the wide sealing test should be carried out. 5.4 Local Resistance Loss of Valves - Equivalent Length Representation The local resistance loss caused by the medium as it passes through the valve and its fittings is indicated by the equivalent length of the pipe, which is designed to be connected to the valve, by the manufacturer or product After the determination of quality testing units proposed, and identified by the measurement department. Select valve according to 6.5 of this standard test, 5.5 anti-corrosion requirements 5.5.1 Select the valve surface can not have obvious signs of corrosion, even if there should be able to easily wash with tap water after the wipe, when the valve has a layer Corrosion-resistant coating then the Xu layer should be complete, and should not be erased when tap water or hand touch. 5.5.2 Select the valve can not be seen on the electrochemical corrosion Salt spray corrosion test according to the test method 6.7 of this standard, the valve parts can not have obvious corrosion damage. After the end of the test should be carried out tightness test and the reliability of the test and meet the requirements of 5.2 and 5.3 of this standard. 5.6 manual operation requirements Test method according to the standard 6.6 test, the test results should meet the following requirements: a manual operating force should not exceed 150 N; b manual operation stroke should not be greater than 300 mm. Manual operation after the completion of the test and then wide strength and overpressure test, should meet the requirements of this standard 5.1. 6 Test methods Production units should submit the design drawings, process documents and the number of samples required by this standard to the testing department for testing 6.1 Appearance Inspection 6.1.1 The sample marks shall be complete and comply with the requirements of the station. 6.1.2 Control design drawings, process documents on the sample inspection, should meet the design and processing of technical requirements. 6.2 Strength requirements 6.2.1 Strength test Open the test valve selected, the valve inlet and hydraulic supply system connected to block the valve outlet (leaving an outlet valve exhaust air, remove the block and then clean out the reserved Air port). Slowly pressurize to 1.5 times of the maximum working pressure and keep pressure relief after 5 minutes, and the test results should meet the requirements of 5.1.1. 6.2.2 Overpressure test The test procedure with the standard 6.2.1, the test pressure is 3 times the maximum working pressure, pressure relief after 5min, and check the valve. The test results should meet the requirements of this standard 5. 1.2. 6.3 Working reliability test The selector valve is connected with the pressure drive device. The drive device pressurizes the selector valve to Pd + 10: MPa. Under the conditions of temperature of 20 ± 5 ℃, the cycle test is carried out according to the following test sequence. Note: Pd: the maximum driving pressure. a. Drive the driving force P to the inlet of the selector valve; b. Activate the selector valve; C. The pressure drops to zero; d. Close the valve and pressurize the valve to the dead. The above cycle test should be repeated 100 times. The test results shall comply with the requirements of this standard by Article 5.3. 6.4 Sealing Test Connect the inlet of the selector valve in the closed state with the hydraulic supply system to block the outlet of the valve and gradually increase the pressure to 1.1 times of the maximum working pressure for 3 minutes and observe whether there is any leakage at the outlet of the valve . Test results should be consistent with the requirements of 5.2 of this standard. 6.5 Determination of equivalent length GB795 container valve using the equivalent length of the determination. 6.6 Manual Operation Test The manual operation mechanism of selector valve is connected with appropriate force measuring device, the selector valve is operated by force measuring device, the maximum operating force is recorded, and the maximum operating stroke is measured and recorded. Test results should be consistent with the requirements of this standard 5.6. 6.7 salt spray corrosion test Salt spray corrosion test should be carried out in a salt spray corrosion chamber, the temperature inside the box is 35 ± 2 ℃, the spray rate of a 2mL / h (effective area 80cm2 collector into the test chamber 24h Measured average spray rate). The test solution is made of aqueous sodium nitrite at a concentration of 50 ± 5g / L with a pH of 6.5-7.2 at 25 ° C. The sprayed solution can not be reused. Specimens were cleaned, degreased, and hung on a special stand in a test chamber at a test period of 240 h. After the end of the experiment, first dried 0.5 a lh, washed in water at 40 ℃, and finally dried in the air. The test results shall comply with the requirements of 5.5 of this standard. 7 Inspection rules 7.1 Product manufacturing units should develop and comply with quality management procedures to ensure that each batch of products are in line with the provisions of this standard. 7.2 Inspection classification 7.2.1 The type test of the product shall be tested according to the provisions of this standard for all the items. 7.2.2 product factory inspection should be based on this standard 6. l, 6.2.1, 6.4 of the test, the standard 6.2.2, 6.3 for the factory sampling. 7.3 to take a random sample, the test procedures and the number of samples in accordance with Appendix A (Supplementary) requirements. 7.4 Determination of test results 7.4.1 Type test All the tests prescribed in this standard pass, the batch of products for the qualified products. This standard 6.2,6.4 - there are - failed, that is substandard goods, the remaining unqualified items. Allow double sampling, there is still a failure, that is, substandard goods. 7.4.2 factory inspection The provisions of this standard 6.1, 6.2, 6.3, 6.4 all the tests were qualified, the batch of qualified products The standard 6.3 test failed, allowing double sampling, still unqualified, the Batch product is unqualified. 7.5 Marking and packaging 7.5.1 Marking Selection of the valve body shall be marked with contents of working pressure, nominal diameter, date of manufacture and manufacturer's factory name or factory mark. 7.5.2 Packaging a. Packing box should have a list of qualified certificates and instructions for use; b. Crates should have random spare parts; c. The exposed mouth of the product should be sealed with plastic or other soft materials to prevent the dirt from entering the body of the valve. The packing and packaging of the product should meet the requirements of transportation and storage. 1 Product model (name) and specifications; 2 Quantity of the contents; 3 Dimensions of the package; 4 Overall weight ; 5 product factory or serial number; 6 manufacturer name and address; 7 "light", "moisture", "anti-collision" and "anti-reversal" and other words or marks. Appendix A Test Procedure (Supplementary Part) A1 Test Procedure Description A1.1 Test No. 1 Visual Inspection ............................................................. (6.1) 2 Intensity Requirements .................. .................................... (6.2) 3 WORK RELIABILITY TEST ................................... (6.3) 4 Tightness test ........................ ........................ (6.4) 5 Determination of equivalent length ................................................... (6.5) 6 Salt spray corrosion test ........................... ..................... (6.7) 7 Manual Operation Test ................................................... (6.6) A1.2 Notes a. The above test numbers are indicated by the box numbers in the test procedure chart. b. The number in the circle of the test procedure chart is the number of test specimens required for the test. A2 Test Procedure Chart Additional note: This standard proposed by the Ministry of Public Security of the People's Republic of China, Ministry of Public Security Tianjin Fire Research Institute. This standard is drafted by Tianjin Fire Science Institute of Ministry of Public Security. The main draftee of this standard Yang Hong. This standard entrusted Tianjin Fire Research Institute of Public Security responsible for the interpretation.