Steel pipe flanges - Part 1: PN designated
1 Scope
This part of GB/T 9124 specifies the styles and parameters, types and sizes, technical requirements, test, inspection and acceptance, signs and designations, and supply requirements of PN designated steel pipe flanges and blind flanges.
This part is applicable to steel pipe flanges and blind flanges with nominal pressure of PN2.5~PN400 and nominal size of DN10~DN4000.
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 152.4 Fasteners - Counterbores for hexagon bolts and nuts
GB/T 700 Carbon structural steels
GB/T 711 Hot-rolled quality carbon structural steel plates and wide strips
GB/T 712 Ship and ocean engineering structural steel
GB/T 713 Steel plates for boilers and pressure vessels
GB/T 1047 Pipework components - Definition and selection of nominal size
GB/T 1048 Pipework components - Definition and selection of nominal pressure
GB/T 1804 General tolerances - Tolerances for linear and angular dimensions without individual tolerance indications
GB/T 3531 Low alloy steel plates for low temperature pressure vessels
GB/T 4237 Hot rolled stainless steel plate, sheet and strip
GB/T 7306.1 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads - Part 1: Parallel internal and taper external threads
GB/T 9125 Fasteners for steel pipe flange joints
GB/T 12228 General purpose industrial valves - Specification of carbon steel forgings
GB/T 12229 General purpose industrial valves - Specification of carbon steel castings
GB/T 12230 General purpose industrial valves - Specification of stainless steel castings
GB/T 12716 Taper pipe threads with 60 degree
GB/T 14976 Seamless stainless steel pipes for fluid transport
GB/T 16253 Steel castings for pressure purposes
JB/T 5263 Specification for steel casting for power station valves
JB/T 7248 Technical specification for low temperature service steel casting for valves
NB/T 47008 Carbon and alloy steel forgings for pressure equipment
NB/T 47009 Alloy steel forgings for low temperature pressure equipment
NB/T 47010 Stainless and heat-resisting steel forgings for pressure equipment
3 Styles and parameters
3.1 Nominal pressure
3.1.1 See GB/T 1048 for the definition of nominal pressure.
3.1.2 This part specifies the following 12 PN designated pressure grades:
PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, PN100, PN160, PN250, PN320 and PN400.
3.2 Nominal size
3.2.1 See GB/T 1047 for the definition of nominal size.
3.2.2 This part specifies the following 39 DN designated specifications:
DN10, DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300, DN350, DN400, DN450, DN500, DN600, DN700, DN800, DN900, DN1000, DN1200, DN1400, DN1600, DN1800, DN2000, DN2200, DN2400, DN2600, DN2800, DN3000, DN3200, DN3400, DN3600, DN3800 and DN4000.
3.3 Outside diameter of Steel pipe
Series I and Series II outside diameters of steel pipe are applicable to this part. The nominal size of PN2.5~PN160 pipe flanges and outside diameter of steel pipe shall meet the requirements of Table 1, and those of PN250~PN400 pipe flanges shall meet the requirements of Table 2.
Table 1 Nominal size of PN2.5~PN160 and outside diameter of steel pipe
.......
.......
3.4 Types and codes of flanges
See Table 3 for types and codes of flanges. See A.1 for the corresponding relationship between this part and EN 1092-1 in terms of code for flange type.
Table 3 Types and codes of flanges
Foreword i
Introduction iii
1 Scope
2 Normative references
3 Styles and parameters
3.1 Nominal pressure
3.2 Nominal size
3.3 Outside diameter of Steel pipe
3.4 Types and codes of flanges
3.5 Types and codes of sealing faces
3.6 Flange types and their application scope
4 Type and size of flange
4.1 Size of flange sealing face
4.2 Type and size of flange
5 Technical requirements
5.1 Materials
5.2 Pressure-temperature rating
5.3 Size tolerance
5.4 Joint sealing face
5.5 Fasteners and gaskets
5.6 Welding end type and size
5.7 Machining and manufacturing
6 Test
7 Inspection and acceptance
7.1 Inspection
7.2 Acceptance
8 Marking and labeling
8.1 Marking
8.2 Labeling
9 Supply requirements
Annex A (Informative) Corresponding relationship between this part and EN 1092-1 in terms of code for flange type and code for sealing face
Annex B (Normative) Welding end type and size
Annex C (Informative) Reference sizes of some flanges outside the scope of this part
Annex D (Informative) Order contract data of flanges
Annex E (Informative) Method for determination of pressure-temperature ratings in EN
Annex F (Informative) Reference mass of flange
Annex G (Informative) Pipe schedule number and steel pipe wall thickness
Bibliography
Steel pipe flanges - Part 1: PN designated
1 Scope
This part of GB/T 9124 specifies the styles and parameters, types and sizes, technical requirements, test, inspection and acceptance, signs and designations, and supply requirements of PN designated steel pipe flanges and blind flanges.
This part is applicable to steel pipe flanges and blind flanges with nominal pressure of PN2.5~PN400 and nominal size of DN10~DN4000.
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 152.4 Fasteners - Counterbores for hexagon bolts and nuts
GB/T 700 Carbon structural steels
GB/T 711 Hot-rolled quality carbon structural steel plates and wide strips
GB/T 712 Ship and ocean engineering structural steel
GB/T 713 Steel plates for boilers and pressure vessels
GB/T 1047 Pipework components - Definition and selection of nominal size
GB/T 1048 Pipework components - Definition and selection of nominal pressure
GB/T 1804 General tolerances - Tolerances for linear and angular dimensions without individual tolerance indications
GB/T 3531 Low alloy steel plates for low temperature pressure vessels
GB/T 4237 Hot rolled stainless steel plate, sheet and strip
GB/T 7306.1 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads - Part 1: Parallel internal and taper external threads
GB/T 9125 Fasteners for steel pipe flange joints
GB/T 12228 General purpose industrial valves - Specification of carbon steel forgings
GB/T 12229 General purpose industrial valves - Specification of carbon steel castings
GB/T 12230 General purpose industrial valves - Specification of stainless steel castings
GB/T 12716 Taper pipe threads with 60 degree
GB/T 14976 Seamless stainless steel pipes for fluid transport
GB/T 16253 Steel castings for pressure purposes
JB/T 5263 Specification for steel casting for power station valves
JB/T 7248 Technical specification for low temperature service steel casting for valves
NB/T 47008 Carbon and alloy steel forgings for pressure equipment
NB/T 47009 Alloy steel forgings for low temperature pressure equipment
NB/T 47010 Stainless and heat-resisting steel forgings for pressure equipment
3 Styles and parameters
3.1 Nominal pressure
3.1.1 See GB/T 1048 for the definition of nominal pressure.
3.1.2 This part specifies the following 12 PN designated pressure grades:
PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, PN100, PN160, PN250, PN320 and PN400.
3.2 Nominal size
3.2.1 See GB/T 1047 for the definition of nominal size.
3.2.2 This part specifies the following 39 DN designated specifications:
DN10, DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300, DN350, DN400, DN450, DN500, DN600, DN700, DN800, DN900, DN1000, DN1200, DN1400, DN1600, DN1800, DN2000, DN2200, DN2400, DN2600, DN2800, DN3000, DN3200, DN3400, DN3600, DN3800 and DN4000.
3.3 Outside diameter of Steel pipe
Series I and Series II outside diameters of steel pipe are applicable to this part. The nominal size of PN2.5~PN160 pipe flanges and outside diameter of steel pipe shall meet the requirements of Table 1, and those of PN250~PN400 pipe flanges shall meet the requirements of Table 2.
Table 1 Nominal size of PN2.5~PN160 and outside diameter of steel pipe
.......
.......
3.4 Types and codes of flanges
See Table 3 for types and codes of flanges. See A.1 for the corresponding relationship between this part and EN 1092-1 in terms of code for flange type.
Table 3 Types and codes of flanges
Contents of GB/T 9124.1-2019
Foreword i
Introduction iii
1 Scope
2 Normative references
3 Styles and parameters
3.1 Nominal pressure
3.2 Nominal size
3.3 Outside diameter of Steel pipe
3.4 Types and codes of flanges
3.5 Types and codes of sealing faces
3.6 Flange types and their application scope
4 Type and size of flange
4.1 Size of flange sealing face
4.2 Type and size of flange
5 Technical requirements
5.1 Materials
5.2 Pressure-temperature rating
5.3 Size tolerance
5.4 Joint sealing face
5.5 Fasteners and gaskets
5.6 Welding end type and size
5.7 Machining and manufacturing
6 Test
7 Inspection and acceptance
7.1 Inspection
7.2 Acceptance
8 Marking and labeling
8.1 Marking
8.2 Labeling
9 Supply requirements
Annex A (Informative) Corresponding relationship between this part and EN 1092-1 in terms of code for flange type and code for sealing face
Annex B (Normative) Welding end type and size
Annex C (Informative) Reference sizes of some flanges outside the scope of this part
Annex D (Informative) Order contract data of flanges
Annex E (Informative) Method for determination of pressure-temperature ratings in EN
Annex F (Informative) Reference mass of flange
Annex G (Informative) Pipe schedule number and steel pipe wall thickness
Bibliography
