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GB/T 9124.2-2019: Steel pipe flanges -- Part 2: Class designated
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Steel pipe flanges -- Part 2: Class designated
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GB/T 9124.2-2019
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Basic data | Standard ID | GB/T 9124.2-2019 (GB/T9124.2-2019) | | Description (Translated English) | Steel pipe flanges -- Part 2: Class designated | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J15 | | Classification of International Standard | 23.040.60 | | Word Count Estimation | 154,158 | | Date of Issue | 2019-05-10 | | Date of Implementation | 2019-12-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 9124.2-2019: Steel pipe flanges -- Part 2: Class designated---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.
Steel pipe flanges - Part 2.Class designated
ICS 23.040.60
J15
National Standards of People's Republic of China
Partly replace GB/T 9112~9124-2010
Steel pipe flanges Part 2.Class series
(ISO 7005-1.2011, Pipeflanges-Part 1.Steelflangesfor
2019-05-10 released
2019-12-01 implementation
State Administration of Market Supervision and Administration
Issued by the National Standardization Administration of China
Table of contents
Foreword Ⅲ
Introduction Ⅳ
1 Scope 1
2 Normative references 1
3 Types and parameters 1
3.1 Nominal pressure 2
3.2 Nominal size 2
3.3 Outer diameter of steel pipe 2
3.4 Flange type and code 3
3.5 Sealing surface type and code 3
3.6 Flange type and scope of application 4
4 Type and size of flange 8
4.1 Flange sealing surface size 8
4.2 Type and size of flange 13
5 Technical requirements 56
5.1 Materials 56
5.2 Pressure-temperature ratings 58
5.3 Dimensional tolerance 82
5.4 Connecting the sealing surface 84
5.5 Fasteners and gaskets 84
5.6 Type and size of welding end 85
5.7 Processing and manufacturing 85
6 Experiment 85
7 Inspection and acceptance 85
7.1 Inspection 85
7.2 Acceptance 86
8 Signs and Marks 86
8.1 Logo 86
8.2 Marking 86
9 Supply requirements 86
Appendix A (informative appendix) Flange order contract data 87
Appendix B (informative appendix) Methods for determining pressure-temperature ratings 88
Appendix C (informative appendix) American ASMEB16.5 on the material selection and pressure-temperature of steel pipe flanges
Rating 92
Appendix D (Normative Appendix) Type and size of welding end 140
Appendix E (informative appendix) Reference quality of flanges 143
Appendix F (informative appendix) Pipe table number and steel pipe wall thickness 148
Reference 150
Foreword
GB/T 9124 "Steel Pipe Flanges" is divided into two parts.
---Part 1.PN series;
---Part 2.Class series.
This part is Part 2 of GB/T 9124.
This section was drafted in accordance with the rules given in GB/T 1.1-2009.
This part replaces GB/T 9112-2010 "Types and Parameters of Steel Pipe Flanges", GB/T 9113-2010 "Integral Steel Pipe Flanges",
GB/T 9114-2010 "Threaded steel pipe flange with neck", GB/T 9115-2010 "Butt welding steel pipe flange", GB/T 9116-2010
"Flat welded steel pipe flange with neck", GB/T 9117-2010 "Socket welded steel pipe flange with neck", GB/T 9118-2010 "Butt welded ring with neck
Loose steel pipe flanges", GB/T 9119-2010 "plate flat welded steel pipe flanges", GB/T 9120-2010 "butt welded ring plate loose steel pipe flanges"
Pipe Flange", GB/T 9121-2010 "Flat Welded Ring Plate Loose Steel Pipe Flange", GB/T 9122-2010 "Flanged Ring Plate Loose Steel Pipe Flange"
"Flange", GB/T 9123-2010 "Steel pipe flange cover", GB/T 9124-2010 "Steel pipe flange technical conditions" Class series method
Lan, PN series flanges are included in Part 1 of GB/T 9124, and the main changes compared with GB/T 9112~9124-2010 series standards
as follows.
---The content of the original standard Class series flange has been supplemented and revised;
---The flange size with the nominal size of DN550 (NPS22) has been added;
---The minimum wall thickness tmin of the integral steel pipe flange has been increased;
---Increase the flange inner diameter B of the integral steel pipe flange;
---According to GB/T 28708-2012, the outer diameter data of the steel pipe was revised;
---Added the pressure-temperature ratings of some flange materials and materials;
---The method for determining the pressure-temperature rating has been added.
This part uses the redrafting method to refer to ISO 7005-1.2011 "Pipe flanges-Part 1.Industrial and general purpose piping system steel
"Flange" is compiled, and the degree of consistency with ISO 7005-1.2011 is non-equivalent.
This part was proposed by China Machinery Industry Federation.
This part is under the jurisdiction of the National Pipeline Accessories Standardization Technical Committee (SAC/TC237).
Drafting organizations of this section. Chaoda Valve Group Co., Ltd., CMC Productivity Promotion Center, PetroChina East China Design Institute Co., Ltd.,
Sinopec Engineering Construction Co., Ltd., China Tianchen Engineering Co., Ltd., Baoyi Group Co., Ltd., Wuxi Huaertai Machinery Manufacturing Co., Ltd.
Company, Wuxi Flange Forging Co., Ltd., Nanjing Gaoning Forging Flange Factory.
The main drafters of this section. Qiu Xiaolai, Li Junying, Liu Hongfu, Chen Yongliang, Liu Jianxin, Liu Jian, Zhang Xiaozhong, Feng Feng, Li Weiye, Li Gangliang,
Yang Li.
The previous releases of the standards replaced by this part are as follows.
---GB/T 9112~9124-1988, GB/T 9112~9124-2000, GB/T 9112~9124-2010.
Introduction
GB/T 9112~9124-2010 series standards are mainly divided into 13 standards according to the different types of flanges. After revision, they are based on the nominal pressure of the flange.
"Steel Pipe Flanges Part 2.Class Series".
ISO 7005-1.2011 "Pipe Flanges Part 1.Steel Flanges for Industrial and General-Purpose Piping Systems" specifies the technology for steel pipe flanges.
Terms and definitions, purchase specifications, technology, pressure limits, materials, precautions for use, other precautions, installation guidelines, purchaser’s regulations letter
Compared with ISO 7005-1.1992, ISO 7005-1.2011 no longer stipulates detailed technical
Materials, temperature ratings, etc. directly quote the European Committee for Standardization Standard EN1092-1 "Flanges and their connecting pipes, valves, pipes, etc.
Round flanges for accessories and accessories, PN identification Part 1.Steel flanges, American Society of Mechanical Engineers standard ASMEB16.5 ``pipe method
Lanhe flange pipe fittings (NPS1/2~NPS24)" and ASMEB16.47 "large diameter steel pipe flanges (NPS26~NPS60)".
The flange size specified in this part is interchangeable with ASMEB16.5-2017, and the technical requirements are basically the same, which is consistent with ASMEB16.5-2017.
The main differences in.2017 are as follows.
---The writing format of this part is different from ASMEB16.5-2017;
---ASMEB16.5-2017 includes flange data with a nominal pressure of Class400, and this part does not include the method of Class400
Blue data;
---ASMEB16.5-2017 includes the flange data of the nominal size NPS3⅟, this part does not have the flange of NPS3⅟
data;
---ASMEB16.5-2017 includes flange metric unit data and imperial unit data (including flange size and pressure-temperature
(Rated value), this section does not include data in imperial units;
---ASMEB16.5-2017 includes the flange pipe fittings of Class150 and Class300.In addition to the integral flange, this part
No other flange pipe fittings are included;
---ASMEB16.5-2017 adopts inch bolts, the bolt hole diameter adopts inch size, this part adopts metric bolts, bolt holes
The diameter adopts metric size;
---Increased the size of Class300DN15 (NPS⅟) and DN20 (NPS) integral steel pipe flanges;
---Increased the size of Class150~Class300DN550 (NPS22) integral steel pipe flanges;
---Increased the size of Class600~Class2500 integral steel pipe flanges;
---The reference quality of the flange has been increased;
---Added flange order contract data;
---Increase the pipe table number and steel pipe wall thickness;
---This part adopts my country's standard flange material, and the pressure-temperature rating is determined with reference to ASMEB16.5-2017.
The flange materials and pressure-temperature ratings of flanges involved in ASMEB16.5-2017 are included as appendices for reference.
Steel pipe flanges Part 2.Class series
1 Scope
This part of GB/T 9124 specifies the types and parameters, types and dimensions, and technical requirements of Class series steel pipe flanges and flange covers.
Requirements, testing, inspection and acceptance, marking and marking, and supply requirements.
This part is applicable to steel with nominal pressure Class150~Class2500 and nominal size DN15~DN600 (NPS⅟~NPS24)
Pipe flanges and flange covers.
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 reference documents, the latest version (including all amendments) is applicable to this document.
GB/T 152.4 Fasteners with counterbore for hexagon head bolts and hexagon nuts
GB/T 700 carbon structural steel
GB/T 711 High-quality carbon structural steel hot-rolled thick steel plate and wide steel strip
GB 713 Steel Plate for Boiler and Pressure Vessel
GB/T 1047 Definition and Selection of Nominal Dimensions of Piping Components
GB/T 1048 The definition and selection of the nominal pressure of piping components
GB/T 1804 General Tolerance Tolerance of linear and angular dimensions without tolerance
GB/T 3274 Carbon structural steel and low-alloy structural steel hot-rolled thick steel plate and steel strip
GB 3531 Low-alloy steel plate for low-temperature pressure vessel
GB/T 4237 stainless steel hot-rolled steel plate and strip
GB/T 7306.1 55° Sealed Pipe Thread Part 1.Cylindrical Internal Thread and Conical External Thread
GB/T 9125 Fasteners for pipe flange connection
GB/T 12228 Technical requirements for carbon steel forgings for general purpose valves
GB/T 12229 General Valve Carbon Steel Casting Technical Conditions
GB/T 12230 General Valve Stainless Steel Casting Technical Conditions
GB/T 12716 60°taper pipe thread
GB/T 16253 Pressure-bearing steel castings
JB4743 Nickel-copper alloy forgings for pressure vessels
JB/T 5263 Power Station Valve Steel Casting Technical Conditions
JB/T 7248 Technical Conditions of Low Temperature Steel Castings for Valves
JB/T 9625 Technical requirements for pressure-bearing steel castings of boiler piping accessories
NB/T 47008 Carbon steel and alloy steel forgings for pressure equipment
NB/T 47009 Low-alloy steel forgings for cryogenic pressure equipment
NB/T 47010 stainless steel and heat-resistant steel forgings for pressure equipment
3 Types and parameters
3.1 Nominal pressure
3.1.1 Refer to GB/T 1048 for the definition of nominal pressure.
3.1.2 This Part specifies the following 6 pressure levels marked with Class for nominal pressure.
Class150Class300Class600Class900Class1500Class2500
3.2 Nominal size
3.2.1 Refer to GB/T 1047 for the definition of nominal size.
3.2.2 This Part specifies the following 20 specifications marked with DN (NPS) for nominal sizes.
DN15 (NPS⅟), DN20 (NPS), DN25 (NPS1), DN32 (NPS1⅟), DN40 (NPS1⅟), DN50 (NPS2),
DN65 (NPS2⅟), DN80 (NPS3), DN100 (NPS4), DN125 (NPS5), DN150 (NPS6), DN200 (NPS8),
DN250 (NPS10), DN300 (NPS12), DN350 (NPS14), DN400 (NPS16), DN450 (NPS18), DN500
(NPS20), DN550 (NPS22), DN600 (NPS24).
3.3 Outer diameter of steel pipe
The outer diameter of the steel pipe applicable to this section is series Ⅰ, and the nominal size of the steel pipe flange and the outer diameter of the steel pipe shall meet the requirements of Table 1.
Table 1 Nominal size and outer diameter of steel pipe
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