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Position: Chinese Standard in English/GB/T 12241-2021
GB/T 12241-2021   Safety valves—General requirements (English Version)
Standard No.: GB/T 12241-2021 Status:valid remind me the status change

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Language:English File Format:PDF
Word Count: 8500 words Price(USD):240.0 remind me the price change

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Implemented on:2021-10-1 Delivery: via email in 1 business day
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Standard No.: GB/T 12241-2021
English Name: Safety valves—General requirements
Chinese Name: 安全阀 一般要求
Chinese Classification: J16    Valve
Professional Classification: GB    National Standard
Issued by: SAMR; SAC
Issued on: 2021-03-09
Implemented on: 2021-10-1
Status: valid
Superseding:GB/T 12241-2005 Safety valves--General requirements
Language: English
File Format: PDF
Word Count: 8500 words
Price(USD): 240.0
Delivery: via email in 1 business day
GB/T 12241-2021 Safety valves—General requirements English Safety Valves — General Requirements 1 Scope This standard specifies the terms and definitions, design, production testing, type testing of safety valves, determination of safety valve performance, determination of sizing of safety valves, as well as marking and sealing of safety valves. This standard is applicable to safety valves having a flow diameter of 4 mm and above which are for use at set pressures of 0.1 MPa and above. 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 of the referenced document (including any amendments) applies. GB/T 1239.2 Cold Coiled Helical Springs Technical Specifications — Part 2: Compressions Spring GB/T 7306 (all parts) Pipe Threads with 55 Degree Thread Angle Where Pressure-tight Joints are Made on the Threads GB/T 9124 (all parts) Steel Pipe Flanges GB/T 12224 General Requirements for Industrial Steel Valves GB/T 12716 Pipe Threads with the Thread Angle of 60 Degrees Where Pressure-tight Joints are Made on Threads GB/T 15530.1 Cast Copper Alloy Integral Flanges GB/T 15530.8 Specifications for Copper Alloy and Composite Flanges GB/T 17241.6 Integral Cast Iron Flanges GB/T 17241.7 Specifications for Cast Iron Pipe Flanges GB/T 23934 Hot Formed Helical Compression Springs — Technical Requirement GB/T 36588 Safety Devices for Protection against Excessive Pressure — Common Data (GB/T 36588-2018, ISO 4126-7:2013, MOD) JB/T 2768 Components of Valves — High Pressure Pipes, Fittings and End-to-end Dimensions of Valves JB/T 2769 Components of Valves — High Pressure Threaded Flanges 3 Terms and Definitions For the purposes of this document, the following terms and definitions apply. 3.1 safety valve valve which automatically, without the assistance of any energy other than that of the fluid concerned, discharges a quantity of the fluid so as to prevent a predetermined safe pressure being exceeded, and which is designed to re-close and prevent further flow of fluid after normal pressure conditions of service have been restored Note: The valve can be characterized either by pop action (rapid opening) or by opening in proportion (not necessarily linear) to the increase in pressure over the set pressure. 3.2 direct loaded safety valve safety valve in which the loading due to the fluid pressure underneath the valve disc is opposed only by a direct mechanical loading device such as a weight, lever and weight, or spring 3.3 set pressure predetermined pressure at which a safety valve under operating conditions commences to open Note: It is the gauge pressure measured at the valve inlet at which the pressure forces tending to open the valve for the specific service conditions are in equilibrium with the forces retaining the valve disc on its seat. 3.4 maximum allowable pressure PS maximum pressure for which the protected equipment is designed
Foreword II 1 Scope 2 Normative References 3 Terms and Definitions 4 Symbols and Units 5 Design 5.1 General 5.2 Valve end connections 5.3 Minimum requirements for springs 5.4 Pressure-temperature ratings 6 Production Testing 6.1 Purpose 6.2 General 6.3 Hydrostatic testing 6.4 Pneumatic testing 6.5 Adjustment of set or cold differential test pressure 6.6 Seat leakage test 7 Type Testing 7.1 General 7.2 Tests to determine operating characteristics 7.3 Tests to determine flow characteristics 7.4 Determination of the coefficient of discharge 7.5 Certification of coefficient of discharge 8 Determination of Safety Valve Performance 9 Sizing of Safety Valves 10 Marking and Sealing 10.1 Marking 10.2 Sealing of a safety valve Bibliography
Referred in GB/T 12241-2021:
*GB/T 1239.2-2009 Cold coiled helical springs technical specifications - Part 2: Compressions spring
*GB/T 7306-1987 Pipe threads where pressure-tight joints are made on the threads
*GB/T 9124-2010 Specification for steel pipe flanges
*GB/T 12224-2015 General requirements for industrial steel valves
*GB/T 12716-2011 Pipe threads with the thread angle of 60 degrees where pressure-tight joints are made on threads
*GB/T 15530.1-2008 Cast copper alloy integral flanges
*GB/T 15530.8-1995 Specifications for copper alloy and composite flanges
*GB/T 17241.6-2008/XG1-2011 Integral cast iron flanges (including Amendment 1)
*GB/T 17241.7-1998 Specifications for cast iron pipe flanges
*GB/T 23934-2015 Hot formed helical compression springs—Technical requirement
*GB/T 36588-2018 Safety devices for protection against excessive pressure—Common data
*JB/T 2768-2010 Components of valves-High pressure pipes fittings and end-to-end dimensions of valves
*JB/T 2769-2008 Components of valves-High pressure threaded flanges
GB/T 12241-2021 is referred in:
*SH/T 3210-2020 Process design specification forpressure relieving devicesin petrochemical industry
*GB/T 12243-2021 Spring loaded safety valves
*GB/T 12242-2021 Pressure relief devices—Performance test code
*GB/T 28778-2012 Pilot-operated safety valves
*GB/T 16507.7-2013 Water-tube Boilers - Part 7: Safety Appurtenances and Instruments
*GB/T 36588-2018 Safety devices for protection against excessive pressure—Common data
*GB 150-2011 Pressure Vessels (Collection GB150.1~150.4-2011)
*GB/T 24159-2022 Welded insulated cylinders
*GB/T 16508.5-2022 Shell boilers—Part 5:Safety appurtenances and instruments
*GB/T 16507.1-2022 Water-tube boilers—Part 1: General requirements
*GB/T 16508.5-2013 Shell Boilers - Part 5: Safety Appurtenances and Instruments
*GB/T 12242-2005 Performance test code - Pressure relief devices
*GB/T 16507.7-2022 Water-tube Boilers - Part 7: Safety Appurtenances and Instruments
*GB/T 37562-2019 Technical conditions of pressurized water electrolysis system for hydrogen production
*GB 150.1-2011 Pressure vessels—Part 1:General requirements
*NB/T 47059-2017 Tank containers for refrigerated liquefied gas
*GB/T 10180-2003 Thermal performance test code for industrial boilers
*GB/T 5248-1985 Copper and copper alloy--Seamless tubes--Eddy current testing method
*GB/T 5248-1998 Electromagnetic (eddy-current) examination of copper and copper alloy seamless tube
*GB/T 5248-2008 Copper and copper alloy-seamless tubes-eddy current testing method
*GB/T 5248-2016 Electromagnetic (eddy-current) examination of copper and copper alloy seamless tube
*GB/T 15706.1-1995 Safety of machinery-Basic concept, general principles for design-Part 1: Basic terminology, methodology
*GB/T 15706.1-2007 Safety of machinery- Basic concepts general principles for design- Part 1: Basic terminology methodology
*GB 518-1991 Motorcycle tyres
*GB 518-1997 Motorcycle tyres
*GB 518-2007 Motorcycle tyres
*GB 5413.20-2013 National Food Safety Standard Determination of choline in infant foods and dairy products
*GB 5413.20-2022 National food safety standard - Determination of Choline in foods, milk and milk products for infants and young children
*GB/T 5782-1986 Hexagon head bolts - Product grades A and B
*GB/T 13932-2016 Iron swing check valve
*GB/T 879.2-2000 Spring - Type straight pins - Slotted, light duty
*GB/T 879.2-2018 Spring-type straight pins-Slotted-Light duty
*QC/T 533-2020 Commercial vehicle drive axle assembly
*GB/T 150.1-2024 Pressure vessels - Part 1: General requirements
*GB/T 45161-2024 Technical specification of safety valves for liquid hydrogen vessels
Code of China
Standard
GB/T 12241-2021  Safety valves—General requirements (English Version)
Standard No.GB/T 12241-2021
Statusvalid
LanguageEnglish
File FormatPDF
Word Count8500 words
Price(USD)240.0
Implemented on2021-10-1
Deliveryvia email in 1 business day
Detail of GB/T 12241-2021
Standard No.
GB/T 12241-2021
English Name
Safety valves—General requirements
Chinese Name
安全阀 一般要求
Chinese Classification
J16
Professional Classification
GB
ICS Classification
Issued by
SAMR; SAC
Issued on
2021-03-09
Implemented on
2021-10-1
Status
valid
Superseded by
Superseded on
Abolished on
Superseding
GB/T 12241-2005 Safety valves--General requirements
Language
English
File Format
PDF
Word Count
8500 words
Price(USD)
240.0
Keywords
GB/T 12241-2021, GB 12241-2021, GBT 12241-2021, GB/T12241-2021, GB/T 12241, GB/T12241, GB12241-2021, GB 12241, GB12241, GBT12241-2021, GBT 12241, GBT12241
Introduction of GB/T 12241-2021
GB/T 12241-2021 Safety valves—General requirements English Safety Valves — General Requirements 1 Scope This standard specifies the terms and definitions, design, production testing, type testing of safety valves, determination of safety valve performance, determination of sizing of safety valves, as well as marking and sealing of safety valves. This standard is applicable to safety valves having a flow diameter of 4 mm and above which are for use at set pressures of 0.1 MPa and above. 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 of the referenced document (including any amendments) applies. GB/T 1239.2 Cold Coiled Helical Springs Technical Specifications — Part 2: Compressions Spring GB/T 7306 (all parts) Pipe Threads with 55 Degree Thread Angle Where Pressure-tight Joints are Made on the Threads GB/T 9124 (all parts) Steel Pipe Flanges GB/T 12224 General Requirements for Industrial Steel Valves GB/T 12716 Pipe Threads with the Thread Angle of 60 Degrees Where Pressure-tight Joints are Made on Threads GB/T 15530.1 Cast Copper Alloy Integral Flanges GB/T 15530.8 Specifications for Copper Alloy and Composite Flanges GB/T 17241.6 Integral Cast Iron Flanges GB/T 17241.7 Specifications for Cast Iron Pipe Flanges GB/T 23934 Hot Formed Helical Compression Springs — Technical Requirement GB/T 36588 Safety Devices for Protection against Excessive Pressure — Common Data (GB/T 36588-2018, ISO 4126-7:2013, MOD) JB/T 2768 Components of Valves — High Pressure Pipes, Fittings and End-to-end Dimensions of Valves JB/T 2769 Components of Valves — High Pressure Threaded Flanges 3 Terms and Definitions For the purposes of this document, the following terms and definitions apply. 3.1 safety valve valve which automatically, without the assistance of any energy other than that of the fluid concerned, discharges a quantity of the fluid so as to prevent a predetermined safe pressure being exceeded, and which is designed to re-close and prevent further flow of fluid after normal pressure conditions of service have been restored Note: The valve can be characterized either by pop action (rapid opening) or by opening in proportion (not necessarily linear) to the increase in pressure over the set pressure. 3.2 direct loaded safety valve safety valve in which the loading due to the fluid pressure underneath the valve disc is opposed only by a direct mechanical loading device such as a weight, lever and weight, or spring 3.3 set pressure predetermined pressure at which a safety valve under operating conditions commences to open Note: It is the gauge pressure measured at the valve inlet at which the pressure forces tending to open the valve for the specific service conditions are in equilibrium with the forces retaining the valve disc on its seat. 3.4 maximum allowable pressure PS maximum pressure for which the protected equipment is designed
Contents of GB/T 12241-2021
Foreword II 1 Scope 2 Normative References 3 Terms and Definitions 4 Symbols and Units 5 Design 5.1 General 5.2 Valve end connections 5.3 Minimum requirements for springs 5.4 Pressure-temperature ratings 6 Production Testing 6.1 Purpose 6.2 General 6.3 Hydrostatic testing 6.4 Pneumatic testing 6.5 Adjustment of set or cold differential test pressure 6.6 Seat leakage test 7 Type Testing 7.1 General 7.2 Tests to determine operating characteristics 7.3 Tests to determine flow characteristics 7.4 Determination of the coefficient of discharge 7.5 Certification of coefficient of discharge 8 Determination of Safety Valve Performance 9 Sizing of Safety Valves 10 Marking and Sealing 10.1 Marking 10.2 Sealing of a safety valve Bibliography
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Keywords:
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