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GB 27791-2020: (Town gas pressure regulator box)
Status: Valid GB 27791: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB 27791-2020 | English | 359 |
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4 days [Need to translate]
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(Town gas pressure regulator box)
| Valid |
GB 27791-2020
|
| GB 27791-2011 | English | 599 |
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3 days [Need to translate]
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City gas pressure regulating installation
| Obsolete |
GB 27791-2011
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PDF similar to GB 27791-2020
Standard similar to GB 27791-2020 GB 44016 GB/T 41319 GB 27790 GB/T 26002 Basic data | Standard ID | GB 27791-2020 (GB27791-2020) | | Description (Translated English) | (Town gas pressure regulator box) | | Sector / Industry | National Standard | | Classification of Chinese Standard | P47 | | Word Count Estimation | 19,117 | | Date of Issue | 2020-11-17 | | Date of Implementation | 2021-12-01 | | Older Standard (superseded by this standard) | GB 27791-2011 | | Regulation (derived from) | National Standard Announcement No. 25 of 2020 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB 27791-2020: (Town gas pressure regulator box)---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.
(Town gas pressure regulator box)
ICS 91:140
P47
National Standards of People's Republic of China
Replace GB 27791-2011
Town gas pressure regulator box
2020-11-17 released
2021-12-01 implementation
State Administration for Market Regulation
Issued by the National Standardization Management Committee
Table of contents
Preface Ⅲ
1 Scope 1
2 Normative references 1
3 Terms and definitions 2
4 Model 3
4:1 Model establishment 3
4:2 Example 4
5 Structure and materials 4
5:1 General requirements 4
5:2 Box 5
5:3 Piping components 5
5:4 Valve 6
5:5 Metering 7
5:6 Heating 7
5:7 Electrical and instrumentation 7
5:8 Security configuration 7
6 Requirements 8
6:1 Appearance and dimensions 8
6:2 Non-destructive testing 8
6:3 Strength 8
6:4 Air tightness 8
6:5 Setting error of outlet pressure 8
6:6 Safety device start pressure setting error 8
6:7 Rated flow 9
6:8 Closing pressure 9
6:9 Insulation performance 9
7 Test method 9
7:1 Test instrument 9
7:2 Appearance and dimensions 9
7:3 Non-destructive testing 9
7:4 Strength 11
7:5 Air tightness 11
7:6 Outlet pressure setting error 12
7:7 Safety device start pressure setting error 12
7:8 Rated flow 12
7:9 Closing pressure 13
7:10 Insulation performance 13
8 Inspection rules 13
8:1 Inspection classification 13
8:2 Factory inspection 13
8:3 Type inspection 13
8:4 Judgment Rule 14
9 Quality certification documents, signs, packaging, transportation and storage 14
9:1 Quality certification documents 14
9:2 Sign 14
9:3 Packaging and transportation 15
9:4 Storage 15
Foreword
This standard was drafted in accordance with the rules given in GB/T 1:1-2009:
This standard replaces GB 27791-2011 "Urban Gas Surge Box": Compared with GB 27791-2011, the main technical changes are as follows:
---Modified the scope (see Chapter 1, Chapter 1 of the:2011 edition);
---Modified the terminology of the gas surge tank (see 3:1, 3:1 in the:2011 edition);
---Modified the definition of the term "rated flow" (see 3:3, 3:3 in the:2011 edition);
--- Added the term "maximum inlet working pressure" (see 3:5);
---Modified the model establishment (see Chapter 4, Chapter 4 of the:2011 edition);
---Modified the structure and materials (see Chapter 5, Chapter 5 of the:2011 edition);
---The technical level of non-destructive testing has been added (see 6:2);
---Modified the test pressure of the air tightness test (see 6:4, 6:4 in the:2011 edition);
---Modified the setting error of the starting pressure of the safety device (see 6:6, 6:6, 6:7 of the:2011 edition);
---Modified the insulation performance (see 6:9, 6:10 in the:2011 edition);
---Modified the non-destructive testing method and ratio (see 7:3:4, 7:3:4 in the:2011 edition);
---Added the disposal method for non-destructive testing unqualified (see 7:3:8);
---Modified the strength test (see 7:4, 7:4 in the:2011 edition);
---Modified the air tightness test method (see 7:5:3, 7:5:3 of the:2011 edition);
---Modified the flow rate during the outlet pressure test (see 7:6:3, 7:6:3 of the:2011 edition):
This standard was proposed and managed by the Ministry of Housing and Urban-Rural Development of the People's Republic of China:
The previous versions of the standard replaced by this standard are as follows:
---GB 27791-2011:
Town gas pressure regulator box
1 Scope
This standard specifies the model, structure and materials, requirements, test methods, and inspection of gas pressure regulator boxes for urban gas (hereinafter referred to as "pressure regulator boxes")
Inspection rules, quality certification documents, signs, packaging, transportation and storage:
This standard applies to imported working pressure not greater than 10:0MPa, and the working temperature range is greater than -20 ℃, less than or equal to 60 ℃
The surge tank:
This standard does not apply to underground surge tanks:
2 Normative references
The following documents are indispensable for the application of this document: For dated reference documents, only the dated version applies to this article
Pieces: For undated references, the latest version (including all amendments) applies to this document:
GB/T 150 (all parts) pressure vessel
GB/T 151 heat exchanger
GB/T 3098:1 Mechanical properties of fasteners bolts, screws and studs
GB 3836:1 Explosive environment Part 1: General requirements for equipment
GB 3836:4 Explosive atmosphere Part 4: Equipment protected by intrinsically safe "i"
GB/T 5310 Seamless steel pipe for high pressure boiler
GB/T 6479 Seamless steel pipe for high pressure fertilizer equipment
GB/T 6968 diaphragm gas meter
GB/T 8163 Seamless steel pipe for conveying fluid
GB 8624 Classification of burning performance of building materials and products
GB/T 9124:1 Steel pipe flanges Part 1: PN series
GB/T 9124:2 Steel Pipe Flange Part 2: Class Series
GB/T 9711 Steel Pipe for Pipeline Transportation System of Petroleum and Natural Gas Industry
GB/T 12224 General requirements for steel valves
GB/T 12237 Steel ball valves for petroleum, petrochemical and related industries
GB/T 12459 Types and parameters of steel butt welding pipe fittings
GB/T 13401 Technical Specification for Steel Butt Welding Fittings
GB/T 13402 large diameter steel pipe flange
GB/T 14976 Seamless stainless steel pipe for fluid transportation
GB/T 17185 steel flange pipe fittings
GB/T 19672 Technical conditions for pipeline valves
GB/T 20801:3 Pressure Piping Specification Industrial Piping Part 3: Design and Calculation
GB/T 20801:4 Pressure Piping Specification Industrial Piping Part 4: Fabrication and Installation
GB/T 20801:5 Pressure Piping Specification Industrial Piping Part 5: Inspection and Testing
GB/T 25198 Pressure Vessel Head
GB 27790 Town Gas Regulator
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