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GB/T 10868-2018: Steam converting valves for power station
Status: Valid GB/T 10868: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 10868-2018 | English | 519 |
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5 days [Need to translate]
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Steam converting valves for power station
| Valid |
GB/T 10868-2018
|
| GB/T 10868-2005 | English | 639 |
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4 days [Need to translate]
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Steam converting valve for power stations
| Obsolete |
GB/T 10868-2005
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| GB 10868-1989 | English | 399 |
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3 days [Need to translate]
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Specifications of the steam converting valve for fossil power stations
| Obsolete |
GB 10868-1989
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PDF similar to GB/T 10868-2018
Basic data | Standard ID | GB/T 10868-2018 (GB/T10868-2018) | | Description (Translated English) | Steam converting valves for power station | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J98 | | Classification of International Standard | 27.060.30 | | Word Count Estimation | 26,297 | | Date of Issue | 2018-02-06 | | Date of Implementation | 2018-09-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 10868-2018: Steam converting valves for power station---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Steam converting valves for power station
ICS 27.060.30
J98
National Standards of People's Republic of China
Replacing GB/T 10868-2005
Power station temperature reducing and pressure reducing valve
Published on.2018-02-06
2018-09-01 Implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Administration released
Directory
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 2
4 Ordering Guide 3
5 Technical requirements 3
6 Material 7
7 Inspection and Test 7
8 Quality Certificate 10
9 Marking, Packaging, Supply, and Transportation 11
Appendix A (informative) Approximate calculation method of valve rated flow and leakage
Appendix B (Normative Appendix) Leak Test Method 14
Appendix C (normative appendix) Valve inspection of cast steel castings
Appendix D (Normative) Test methods for basic error, hysteresis, dead band and rated travel deviation 17
Appendix E (Normative) Measurement of the rated flow coefficient 18
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 10868-2005 "Power Station Temperature Reducing Valve". Compared with GB/T 10868-2005, except for editorial changes
The main technical changes are as follows.
--- Added terminology (see 3.4, 3.5, 3.6, 3.8, 3.14, 3.15 and 3.17);
--- Increased the basic error, hysteresis, dead zone, and rated stroke deviation of performance requirements (see 5.3.1);
--- Modify the pressure characteristics and flow characteristics in the original performance requirements, unified change to linear (LN) and equal percentage (EP) flow rate
Deviations from the characteristic curves and slope deviations from the inherent flow characteristics (see 5.3.3 and 5.3.5, 5.5 and 5.6 in.2005);
--- Increased physical and chemical requirements and regulations for Grade III forgings (see 5.5.5);
--- Increased the calculation of rated flow and leakage (see Appendix A).
This standard is proposed and managed by the National Standardization Technical Committee for Boiler and Pressure Vessels (SAC/TC262).
This standard was drafted by. Hangzhou Huahui Valve Co., Ltd., Shanghai Power Generation Equipment Design and Research Institute Co., Ltd., and Harbin Power Group.
Harbin Power Station Valve Co., Ltd., Wuhan Boiler Group Valve Co., Ltd., Huaxia Valve Co., Ltd., Qingdao Power Station Valve Co., Ltd.
Secretary, South Valve Manufacturing Co., Ltd., Zhejiang Longde Environmental Protection Thermoelectric Co., Ltd.
The main drafters of this standard are Chen Lilong, Zhang Ming, Chen Xiubin, Chen Weiping, Song Huanqiao, Zhang Na, Chen Xuefeng, Liu Shizhong, Wei Yubin, and Chen Wenlong.
The previous versions of the standard replaced by this standard are.
--- GB/T 10868-1989, GB/T 10868-2005.
Power station temperature reducing and pressure reducing valve
1 Scope
This standard specifies the terminology and definition of power station temperature reducing and pressure reducing valve, ordering guide, technical requirements, materials, inspection and test, quality certificate,
Marking, packaging, delivery and shipping.
This standard applies to work pressure P ≤ 35MPa, working temperature t ≤ 625 °C power station steam system with temperature reducing valve.
Working pressure P ≤ 35MPa, operating temperature t ≤ 625°C, power station steam system pressure reducing valve and power station with operating temperature t >625°C
Steam system with temperature reducing valve can be implemented by reference.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 1047 Definition and selection of DN (nominal size) of pipeline components
GB/T 1048 Definition and Selection of PN (Nominal Pressure) Pipeline Components
GB/T 9113 Integral Steel Pipe Flange
GB/T 12221 Metal Valve Structure Length
GB/T 12224 steel valve general requirements
GB/T 12229 General Valve Carbon Steel Casting Technical Conditions
GB/T 15056 Casting Surface Roughness Evaluation Method
GB/T 21465 valve terminology
GB/T 26480 valve inspection and test
JB/T 5223 Pneumatic Long Stroke Actuator for Industrial Process Control Systems
JB/T 5263 power station valve cast steel technical conditions
JB/T 6439 Valve Pressure Parts Magnetic Powder Inspection Inspection
JB/T 6440 Valves Pressed Castings Radiographic Inspection
JB/T 6902 Valve Liquid Permeation Test
JB/T 6903 valve forgings ultrasonic inspection method
JB/T 7927 Valve Cast Steel Appearance Quality Requirements
JB/T 8219 Common and Intelligent Electric Actuators for Industrial Process Control Systems
Technical Conditions for JB/T 9625 Boiler Pipe Accessory Steel Castings
NB/T 47008 Carbon and Alloy Steel Forgings for Pressure Equipment
NB/T 47013.2 Nondestructive Testing of Pressure Equipment Part 2. Ray Inspection
NB/T 47013.3 Nondestructive testing of pressure equipment - Part 3. Ultrasonic testing
NB/T 47013.4 Nondestructive testing of pressure equipment - Part 4. Magnetic particle testing
NB/T 47013.5 Nondestructive testing of pressure equipment - Part 5. Penetrant testing
NB/T 47037 Power Station Valve Modeling Method
NB/T 47044 Power Station Valve
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