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GB 567.4-2012 PDF English

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GB 567.4-2012: [GB/T 567.4-2012] Bursting disc safety devices -- Part 4: Type test
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GB 567.4-2012145 Add to Cart Auto, 9 seconds. [GB/T 567.4-2012] Bursting disc safety devices -- Part 4: Type test Valid

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GB 567.3   GB 567.2   GB 567.1   GB/T 150.2   

GB 567.4-2012: [GB/T 567.4-2012] Bursting disc safety devices -- Part 4: Type test

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GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 13.240 J 74 Bursting Disc Safety Devices - Part 4.Type Test Issued on. MAY 11, 2012 Implemented on. MARCH 1, 2013 Jointly Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the People's Republic of China.

Table of Contents

Foreword... 3 1 Scope... 4 2 Normative References... 4 3 Terms and Definitions... 5 4 Burst Pressure Testing... 6 5 Flow Capacity Testing... 10 6 Fatigue Testing... 18 7 Flow Resistance Testing... 21 8 Uncertainty Of Measurement... 31 Appendix A (Informative) Table of Test Records and Test Results... 33

1 Scope

1.1 This Part of GB 567 specifies technical requirements for test principles and methods, test devices and instruments, test conditions and test preparation, test rules, test procedures, data processing and measurement uncertainty calculation, etc. for burst pressure testing, flow capacity testing, fatigue testing and flow resistance testing in terms of type tests of bursting disc safety devices. 1.2 This Part is applicable to the following bursting disc safety devices. — This Part is applicable to the bursting disc safety devices used for pressure vessels, pressure pipes or other sealing pressure equipment (hereinafter referred to as pressure equipment) to prevent overpressure or excess vacuum; — As for the bursting discs in the bursting disc safety devices applicable in this Part, the bursting pressure shall not be greater than 500MPa and not less than 0.001MPa. 1.3 This Part is not applicable to the following bursting disc safety devices. — Pressure equipment, possible to increase pressure abruptly in the operation, reaching reaction rate at detonation degree. — Bursting disc safety devices under the special requirements in the defense military equipment. Note. Phenomenon that is generated very differently from the common burning and explosion when the burning rate of the material is quickly, above 1 000m/s, is known as detonation.

2 Normative References

The following documents are indispensable for the application of this standard. For dated references, only the dated edition is applicable to this document. For undated references, the latest editions of the normative documents (including all the amendments) are applicable to this document. GB 567.1 Bursting disc safety devices - Part 1 Basic requirements GB 567.2 Bursting disc safety devices P art 2.Application, selection and installation GB 567.3 Bursting disc safety devices - Part 3.Classification and installation dimension GB/T 2624 Measurement of fluid flow by means of orifice plates, nozzles and Venturi tubes inserted in circular cross-section conduits running full GB/T 21188 Measurement of gas flow by means of critical flow Venturi nozzles

3 Terms and Definitions

For the purposes of this Part, the following terms and definitions as well as those established in GB 567.1, GB 567.2 and GB 567.3 shall apply. 3.1 Burst pressure testing The test that verifies the operating performance of bursting disc safety devices to determine their bursting pressure at designate temperature. 3.2 Flow capacity testing The test that determines the operating characteristics of bursting disc safety devices and measures their discharge capacity under corresponding pressure. 3.4 Measured relieving (discharge) capacity The discharge capacity of bursting disc safety devices that is measured under relief pressure, represented by discharge weight or volume per unit time.

4 Burst Pressure Testing

4.1 General requirements The burst pressure testing shall be conducted on the exclusive burst pressure test device or on the device used in flow capacity testing or flow resistance testing, which shall be completed at the same time with the discharge capacity testing or flow resistance testing. 4.2 Test Principles and Methods 4.3 Test Devices and Instruments Pressure port 4.3.1 Test devices Burst pressure test devices shall meet the following requirements. 4.3.2 Temperature measurement Thermocouple, thermal resistance or other devices that are able to accurately measure the bursting disc temperature shall be adopted to measure the test temperature of the bursting disc. The resolution of the temperature measuring instruments shall not be below 0.5°C. 4.4 Test conditions and test preparation 4.4.1 Test medium In general, the test medium shall be compressed air, water or hydraulic oil. However, the test medium under high pressure or high temperature shall be nitrogen, hydraulic oil or heat-transfer oil. 4.4.2 Test preparation Test preparation shall meet the following requirements. 4.5 Test rules 4.5.1 Sampling Sampling of bursting discs for test shall be selected at random from the same lot in the lot production; the number of samples shall be 4. 4.5.2 Test number Randomly select 3 pieces from the sampled bursting disc devices for burst pressure testing. 4.5.3 Test temperature 4.6 Test procedures Test procedures are as follows. 4.7 Data processing 4.8 Retest 4.8.1 If not all the testing conclusions of the burst pressure testing discs are qualified, it is allowable to sample 6 discs from the products in the same lot again for retest. 4.8.2 If all of the burst pressure retesting results are within the permissible scope of the standard, the burst pressure testing conclusion of such model of bursting disc products represented by the disc samples may be regarded as qualified. 4.9 Test Record and Test Report

5 Flow Capacity Testing

5.1 General requirements The flow capacity testing shall be completed on the exclusive flow capacity test device at the same time with the burst pressure testing, or the bursting disc safety devices may be subject to the flow capacity testing after the burst pressure testing. 5.3 Test Devices and Instruments 5.3.1 Test devices Flow capacity test device shall meet the following requirements. 5.3.5 Flow measurement Flow measurement shall meet the following requirements. 5.4 Test conditions and test preparation 5.4.1 Test medium The medium in the flow capacity testing should be compressed air or water. Conduct test at normal temperature as much as possible. 5.4.2 Test preparation Test preparation shall meet the following requirements. 5.5 Test rules 5.6 Data processing 5.6.1 Conduct flow capacity testing on the 3 bursting discs respectively and calculate the average value of the discharge capacity. If the difference between the discharge capacity of each bursting disc and the average discharge capacity is within 5%, the average value will be adopted as the measured discharge capacity of such model of bursting discs.

6 Fatigue Testing

6.1 Test Principles and Methods Install the bursting disc safety device on the test device which can boost and reduce pressure frequently as required or on an exclusive fatigue test device. 6.2 Test Devices and Instruments 6.2.1 Test devices Test devices shall meet the following requirements. 6.2.2 Pressure measurement Pressure gauge or pressure transmitter whose accuracy grade is not below 1.6 and measuring range is 1.5~3 times of the test pressure value shall be adopted. 6.2.3 Temperature measurement Temperature measurement shall meet the following requirements. 6.3 Test conditions and test preparation 6.3.1 Test medium In general, the medium in the fatigue testing should be compressed air, water or oil. Conduct cold test as much as possible. 6.4 Test rules 6.4.1 Sampling Sampling of bursting discs for test shall be selected at random from the same lot in the lot production; the number of samples shall be 4.Test discs may be used in the flow capacity testing or the flow resistance factor test. But the post-bursting shape of the bursting disc must be guaranteed to meet the relevant requirements. 6.5 Test procedures Test procedures are as follows. 6.6 Data processing 6.6.1 The bursting disc safety device for fatigue property test shall be conducted with burst pressure testing after the fatigue testing is completed. If all the burst pressure values of all the tested bursting disc safety devices do not exceed the allowable tolerance extent of the burst pressure, the fatigue property test conclusion shall be regarded as qualified. 6.7 Test Record and Test Report

7 Flow Resistance Testing

7.1 General requirements The flow resistance testing shall be completed on the exclusive flow resistance test device at the same time with the burst pressure testing, or the bursting disc safety devices may be subject to the flow resistance testing after the burst pressure testing. 7.2 Test Principles and Methods 7.3 Test Device and instruments 7.4 Test conditions and test preparation 7.4.1 Test medium The medium for the flow resistance testing should be compressed air. 7.4.2 Test preparation Test preparation shall meet the following requirements. 7.5 Test rules 7.5.1 Sampling Sampling rules are as follows. 7.5.2 Test number Randomly select 3 discs from the sampled bursting disc safety device for flow resistance testing. 7.6 Test procedures 7.6.3 Flow measurement procedure by using critical flow Venturi nozzle 7.8 Test record and test report 7.8.1 The requirements of test record are detailed in Appendix A. 7.8.2 The requirements of test report are detailed in Appendix B.

8 Uncertainty Of Measurement

8.1 General The uncertainty of measurements shall be calculated in the type test report and an uncertainty report shall be issued. 8.2 Calculation of uncertainty of flow measurement 8.2.1 Calculate the mass flow according to Formula (41). ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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