2023-9-27 3.235.188.113
Code of China Chinese Classification Professional Classification ICS Classification Latest News Value-added Services

Position: Chinese Standard in English/GB/T 40079-2021
GB/T 40079-2021   Classification system and qualification procedures for fugitive emission type testing of valves (English Version)
Standard No.: GB/T 40079-2021 Status:valid remind me the status change

Email:

Language:English File Format:PDF
Word Count: 19500 words Price(USD):585.0 remind me the price change

Email:

Implemented on:2021-11-1 Delivery: via email in 1 business day
,,
Standard No.: GB/T 40079-2021
English Name: Classification system and qualification procedures for fugitive emission type testing of valves
Chinese Name: 阀门逸散性试验分类和鉴定程序
Chinese Classification: J16    Valve
Professional Classification: GB    National Standard
ICS Classification: 23.060.01 23.060.01    Valves in general 23.060.01
Issued by: SAMR, SAC
Issued on: 2021-04-30
Implemented on: 2021-11-1
Status: valid
Language: English
File Format: PDF
Word Count: 19500 words
Price(USD): 585.0
Delivery: via email in 1 business day
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. This standard is prepared in accordance with the rules given in GB/T 1.1-2009. This standard has been redrafted and modified in relation to ISO 15848-1:2015 Industrial valves - Measurement, test and qualification procedures for fugitive emissions - Part 1: Classification system and qualification procedures for type testing of valves. Technical differences have been made with respect to ISO 15848-1:2015, and corresponding technical differences and their reasons are as follows: a) the adjustments of technical deviations are made for the normative references in this standard so as to adapt to the technical conditions of China. The adjustments are mainly reflected in Clause 2 "Normative references", with the specific adjustments as follows:  ISO 5208 has been replaced by GB/T 13927, which is modified in relation to the international standard (see 5.1.1);  EN 13185:2001 has been deleted (the necessary content has been elaborated in the standard);  GB/T 21465 has been added for reference (see Clause 3). b) some terms in Clause 3 of ISO 15848-1:2015, already specified in GB/T 21465, have been deleted, and the terms and definitions of "static test" and "mechanical cycle test" appearing in the text have been added. c) the abbreviation "Mair" in Clause 4 of ISO 15848-1:2015 which is not used in this standard has been deleted, and CC and other abbreviations that appeared in this standard have been added. d) the allowable values and parameters with Pa·m3·s-1 as the unit for leak rate in Table 1, A.1.7, A.2.7, Table C.1 and Table C.2 of ISO 15848-1:2015 have been converted to meet the practical needs of China. e) description on valve product marking in the 6.6 of ISO 15848-1:2015 "ISO FE...-ISO 15848-1" has been changed to "GB FE...-GB/T 40079", and test pressure unit "bar" has been converted to the pressure unit "MPa" to meet the practical needs of China.   The following editorial changes are made in this standard: ——the standard name is changed to "Classification system and qualification procedures for fugitive emission type testing of valves". ——the standards ISO 15848-1:2015+Al: 2017 are included. ——the original references have been deleted, as the original standard only cited some concepts, which have been expressed in this standard. This standard was proposed by China Machinery Industry Federation. This standard is under the jurisdiction of National Technical Committee on Valve of Standardization Administration of China (SAC/TC 188). Classification system and qualification procedures for fugitive emission type testing of valves 1 Scope This standard specifies the type test requirements for valves used for fugitive fluids, as well as classification system and qualification procedures for fugitive emission type testing of valves. It specifies testing procedures for evaluation of external leakage of valve stem seals (or shaft) and body joints of isolating valves and control valves intended for application in volatile air pollutants and hazardous fluids. End connection joints, vacuum application, effects of corrosion, and radiation are excluded from this standard. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. GB/T 13927 Industrial valves - Pressure testing GB/T 21465 Terminology for valves 3 Terms and Definitions For the purposes of this document, the terms and definitions given in GB/T 21465, as well as the following definitions, apply. 3.1 body seals any seal in pressure containing part except stem (or shaft) seals 3.2 concentration ratio of test fluid volume to the gas mixture volume measured at the leak source(s) of the test valve   Note: the unit of concentration is a dimensionless unit (volume per million or volume fraction is 1×10-6), expressed in ppmv.1 ppmv = 1 mL/m3 = 1 cm3 /m3. 3.3 control valve power operated device which changes the fluid flow rate in a process control system Note: The device consists of a valve connected to an actuator that is capable of changing the position of a closure member in the valve in response to a signal from the controlling system. 3.4 fugitive emission chemical or mixture of chemicals, in any physical form, which represents an unanticipated or spurious leakage from equipment on an industrial site 3.5 leakage loss of the test fluid through the stem (or shaft) seal or body seal(s) of a test valve under the specified test conditions Note: Leakage is generally expressed as a concentration or a leak rate. 3.6 leak rate mass flow rate of the test fluid per unit length Note: The leak rate can be expressed in milligrams per second millimeter (mg·s-1·mm-1) through stem seal system or volumetric flow rate of the test fluid, expressed in millibar liters per second millimeter (mbar·L·s-1·mm-1) through stem seal system. 3.7 local leakage measurement of the test fluid leakage using a sniffer probe at the leak source point 3.8 mechanical cycle of control valve for linear/rotary control valves, test cycles performed at 50% of stroke/angle with an amplitude of ± 10% of full stroke/angle 3.9 mechanical cycle of isolating valve motion of a valve obturator moving from fully closed position to fully opened position, and returning to fully closed position 3.10 isolating valve valve intended for use principally in the closed or open position which can be power actuated or manually operated 3.11 performance class level of the performance composed of tightness class, endurance class and temperature class of a test valve Note: The performance classes are defined in Clause 6. 3.12 room temperature temperature in the range of +5°C to +40°C prior to the test 3.13 stem seal shaft seal component(s) installed around the valve stem (or shaft) to avoid leakage of internal fluids to atmosphere 3.14 test pressure pressure used for testing the valve Note: Unless otherwise specified, test pressure is the rated pressure specified at the test temperature and the shell material of a test valve in the relevant standards. 3.15 test temperature fluid temperature selected for the test as measured inside the test valve Note: The test temperature is given in Table 5. 3.16 thermal cycle change of the temperature from the room temperature to the specified test temperature and return to room temperature 3.17 total leakage collection of leakage of the test fluid at the leak source using an encapsulation method 3.18 type test test conducted to establish the performance class of a valve 3.19 static test test conducted under the specified temperature and test pressure to test the sealing performance of the valve stem without operating the valve 3.20 mechanical cycle test test conducted under the specified temperature and test pressure to test the sealing performance of the valve stem by completing a specified number of switching (or adjustment) operations on the valve 4 Abbreviations For the purposes of this document, the following abbreviations apply. AH: fugitive emission Class A with Helium. AM: fugitive emission Class A with Methane. BH: fugitive emission Class B with Helium. BM: fugitive emission Class B with Methane. CC: mechanical-cycle classes for control valves. CH: fugitive emission Class C with Helium. CM: fugitive emission Class C with Methane. CO: mechanical-cycle classes for isolating valves. FE: fugitive emission. GB: National Standard of the People's Republic of China. RT: room temperature. SSA: stem seal adjustment. tRT(100°C): test temperature is 100°C, the valve is qualified at tRT.
Foreword i 1 Scope 2 Normative references 3 Terms and Definitions 4 Abbreviations 5 Type tests 5.1 Test conditions 5.2 Test procedure 6 Performance classes 6.1 Classification criteria 6.2 Tightness classes 6.3 Endurance classes 6.4 Temperature classes 6.5 Examples of class designation 6.6 Examples of marking 7 Reporting 8 Extension of qualification to untested valves Annex A (Normative) Total leak rate measurement Annex B (Normative) Sniffing method Annex C (Informative) Leak rate conversion (helium)
Referred in GB/T 40079-2021:
*GB/T 13927-2008 Industrial Valves-Pressure Testing
*GB/T 21465-2008 Terminology for valves
GB/T 40079-2021 is referred in:
*T/CGMA 0405-2022 Cryogenic valves for hydrogen — General test method
*T/CGMA 0407-2022 Cryogenic valves for hydrogen ― General technical specifications
Code of China
Standard
GB/T 40079-2021  Classification system and qualification procedures for fugitive emission type testing of valves (English Version)
Standard No.GB/T 40079-2021
Statusvalid
LanguageEnglish
File FormatPDF
Word Count19500 words
Price(USD)585.0
Implemented on2021-11-1
Deliveryvia email in 1 business day
Detail of GB/T 40079-2021
Standard No.
GB/T 40079-2021
English Name
Classification system and qualification procedures for fugitive emission type testing of valves
Chinese Name
阀门逸散性试验分类和鉴定程序
Chinese Classification
J16
Professional Classification
GB
ICS Classification
Issued by
SAMR, SAC
Issued on
2021-04-30
Implemented on
2021-11-1
Status
valid
Superseded by
Superseded on
Abolished on
Superseding
Language
English
File Format
PDF
Word Count
19500 words
Price(USD)
585.0
Keywords
GB/T 40079-2021, GB 40079-2021, GBT 40079-2021, GB/T40079-2021, GB/T 40079, GB/T40079, GB40079-2021, GB 40079, GB40079, GBT40079-2021, GBT 40079, GBT40079
Introduction of GB/T 40079-2021
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. This standard is prepared in accordance with the rules given in GB/T 1.1-2009. This standard has been redrafted and modified in relation to ISO 15848-1:2015 Industrial valves - Measurement, test and qualification procedures for fugitive emissions - Part 1: Classification system and qualification procedures for type testing of valves. Technical differences have been made with respect to ISO 15848-1:2015, and corresponding technical differences and their reasons are as follows: a) the adjustments of technical deviations are made for the normative references in this standard so as to adapt to the technical conditions of China. The adjustments are mainly reflected in Clause 2 "Normative references", with the specific adjustments as follows:  ISO 5208 has been replaced by GB/T 13927, which is modified in relation to the international standard (see 5.1.1);  EN 13185:2001 has been deleted (the necessary content has been elaborated in the standard);  GB/T 21465 has been added for reference (see Clause 3). b) some terms in Clause 3 of ISO 15848-1:2015, already specified in GB/T 21465, have been deleted, and the terms and definitions of "static test" and "mechanical cycle test" appearing in the text have been added. c) the abbreviation "Mair" in Clause 4 of ISO 15848-1:2015 which is not used in this standard has been deleted, and CC and other abbreviations that appeared in this standard have been added. d) the allowable values and parameters with Pa·m3·s-1 as the unit for leak rate in Table 1, A.1.7, A.2.7, Table C.1 and Table C.2 of ISO 15848-1:2015 have been converted to meet the practical needs of China. e) description on valve product marking in the 6.6 of ISO 15848-1:2015 "ISO FE...-ISO 15848-1" has been changed to "GB FE...-GB/T 40079", and test pressure unit "bar" has been converted to the pressure unit "MPa" to meet the practical needs of China.   The following editorial changes are made in this standard: ——the standard name is changed to "Classification system and qualification procedures for fugitive emission type testing of valves". ——the standards ISO 15848-1:2015+Al: 2017 are included. ——the original references have been deleted, as the original standard only cited some concepts, which have been expressed in this standard. This standard was proposed by China Machinery Industry Federation. This standard is under the jurisdiction of National Technical Committee on Valve of Standardization Administration of China (SAC/TC 188). Classification system and qualification procedures for fugitive emission type testing of valves 1 Scope This standard specifies the type test requirements for valves used for fugitive fluids, as well as classification system and qualification procedures for fugitive emission type testing of valves. It specifies testing procedures for evaluation of external leakage of valve stem seals (or shaft) and body joints of isolating valves and control valves intended for application in volatile air pollutants and hazardous fluids. End connection joints, vacuum application, effects of corrosion, and radiation are excluded from this standard. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. GB/T 13927 Industrial valves - Pressure testing GB/T 21465 Terminology for valves 3 Terms and Definitions For the purposes of this document, the terms and definitions given in GB/T 21465, as well as the following definitions, apply. 3.1 body seals any seal in pressure containing part except stem (or shaft) seals 3.2 concentration ratio of test fluid volume to the gas mixture volume measured at the leak source(s) of the test valve   Note: the unit of concentration is a dimensionless unit (volume per million or volume fraction is 1×10-6), expressed in ppmv.1 ppmv = 1 mL/m3 = 1 cm3 /m3. 3.3 control valve power operated device which changes the fluid flow rate in a process control system Note: The device consists of a valve connected to an actuator that is capable of changing the position of a closure member in the valve in response to a signal from the controlling system. 3.4 fugitive emission chemical or mixture of chemicals, in any physical form, which represents an unanticipated or spurious leakage from equipment on an industrial site 3.5 leakage loss of the test fluid through the stem (or shaft) seal or body seal(s) of a test valve under the specified test conditions Note: Leakage is generally expressed as a concentration or a leak rate. 3.6 leak rate mass flow rate of the test fluid per unit length Note: The leak rate can be expressed in milligrams per second millimeter (mg·s-1·mm-1) through stem seal system or volumetric flow rate of the test fluid, expressed in millibar liters per second millimeter (mbar·L·s-1·mm-1) through stem seal system. 3.7 local leakage measurement of the test fluid leakage using a sniffer probe at the leak source point 3.8 mechanical cycle of control valve for linear/rotary control valves, test cycles performed at 50% of stroke/angle with an amplitude of ± 10% of full stroke/angle 3.9 mechanical cycle of isolating valve motion of a valve obturator moving from fully closed position to fully opened position, and returning to fully closed position 3.10 isolating valve valve intended for use principally in the closed or open position which can be power actuated or manually operated 3.11 performance class level of the performance composed of tightness class, endurance class and temperature class of a test valve Note: The performance classes are defined in Clause 6. 3.12 room temperature temperature in the range of +5°C to +40°C prior to the test 3.13 stem seal shaft seal component(s) installed around the valve stem (or shaft) to avoid leakage of internal fluids to atmosphere 3.14 test pressure pressure used for testing the valve Note: Unless otherwise specified, test pressure is the rated pressure specified at the test temperature and the shell material of a test valve in the relevant standards. 3.15 test temperature fluid temperature selected for the test as measured inside the test valve Note: The test temperature is given in Table 5. 3.16 thermal cycle change of the temperature from the room temperature to the specified test temperature and return to room temperature 3.17 total leakage collection of leakage of the test fluid at the leak source using an encapsulation method 3.18 type test test conducted to establish the performance class of a valve 3.19 static test test conducted under the specified temperature and test pressure to test the sealing performance of the valve stem without operating the valve 3.20 mechanical cycle test test conducted under the specified temperature and test pressure to test the sealing performance of the valve stem by completing a specified number of switching (or adjustment) operations on the valve 4 Abbreviations For the purposes of this document, the following abbreviations apply. AH: fugitive emission Class A with Helium. AM: fugitive emission Class A with Methane. BH: fugitive emission Class B with Helium. BM: fugitive emission Class B with Methane. CC: mechanical-cycle classes for control valves. CH: fugitive emission Class C with Helium. CM: fugitive emission Class C with Methane. CO: mechanical-cycle classes for isolating valves. FE: fugitive emission. GB: National Standard of the People's Republic of China. RT: room temperature. SSA: stem seal adjustment. tRT(100°C): test temperature is 100°C, the valve is qualified at tRT.
Contents of GB/T 40079-2021
Foreword i 1 Scope 2 Normative references 3 Terms and Definitions 4 Abbreviations 5 Type tests 5.1 Test conditions 5.2 Test procedure 6 Performance classes 6.1 Classification criteria 6.2 Tightness classes 6.3 Endurance classes 6.4 Temperature classes 6.5 Examples of class designation 6.6 Examples of marking 7 Reporting 8 Extension of qualification to untested valves Annex A (Normative) Total leak rate measurement Annex B (Normative) Sniffing method Annex C (Informative) Leak rate conversion (helium)
About Us   |    Contact Us   |    Terms of Service   |    Privacy   |    Cancellation & Refund Policy   |    Payment
Tel: +86-10-8572 5655 | Fax: +86-10-8581 9515 | Email: coc@codeofchina.com | QQ: 672269886
Copyright: TransForyou Co., Ltd. 2008-2040
 
 
Keywords:
GB/T 40079-2021, GB 40079-2021, GBT 40079-2021, GB/T40079-2021, GB/T 40079, GB/T40079, GB40079-2021, GB 40079, GB40079, GBT40079-2021, GBT 40079, GBT40079