Some standard content:
GB/T 9114--2000
This standard is a revised version of GB/T9114.1~9114.3-1988 "Raised Face Threaded Steel Pipe Flanges". Based on the reference to ISO7005-1:1992 "Metal Flanges Part 1: Steel Flanges" and other international and foreign advanced standards, this standard has made the following modifications to the original standard in combination with domestic usage: 1. The composition of the original standard has been appropriately adjusted. From the original one flange type, one sealing surface type and one pressure level to form one standard, it has been changed to one flange type, one sealing surface type and all pressure levels to form one standard, thus compressing the original three standards into one. bZxz.net
2. The content of the original standard has been greatly supplemented and expanded. The original standard only has flange sizes for four pressure levels: PNO.6, PNI.0, PNI.6 and PN2.5MPa. In addition to adding flange dimensions of PN4.0MPa, which belongs to the European system, the revised flange standard also adds flange dimensions of PN2.0, PN5.0, PN11.0 and PN15.0MPa, which belongs to the American system, expanding the scope of application of the standard.
3 Some dimensions in the original standard, such as bolt specifications, sealing surface dimensions and bolt hole diameters, have been appropriately modified according to 1SO7005-1:1992.
4 The sealing surface "convex surface" in the original standard has been changed to "raised surface". In this standard, the flange dimensions of PN0.6, PN1.0, PN1.6, PN2.5 and PN4.0MPa belong to the European flange system; the flange dimensions of PN2.0, PN5.0, PN11.0 and PN15.0MPa belong to the American flange system; these flange dimensions are interchangeable with the flange dimensions of the corresponding pressure levels in Europe and America.
In this standard, the flange dimensions of PN0.6, PN1.0, PN1.6, PN2.5, PN4.0 MPa and PN2.0, PN5.0, PN11.0, PN15.0 MPa are equivalent to the flange dimensions of ISO7005-1:1992. The format of this standard is different from that of ISO7005-1:1992. The reason for adopting the current format is mainly to consider the convenience of use and the inheritance in the implementation of the standard.
From the date of implementation, this standard will replace GB/T9114.1~9114.3-1988. This standard is under the jurisdiction of the National Technical Committee for Standardization of Pipeline Accessories. This standard is interpreted by the National Technical Committee for Standardization of Pipeline Accessories. Drafting units of this standard: Mechanical Science Research Institute, National Chemical Equipment Design Technology Center, Jianjiang Chaoda Valve Co., Ltd., Tianjin Jinding Pipeline Co., Ltd., Wuxi Petrochemical General Parts Factory. The main drafters of this standard are Li Junying, Yu Jun, Yu Fang, Qiu Xiaolai, Min Zhiqing and Li Renxing. This standard was first issued in 1988 and revised for the first time in 2000. 1 Scope
National Standard of the People's Republic of China
Raised face threaded steel pipe flanges with neck
Hubbed screwed steel pipe Tlanges with raised faceGB/T9114-2000
Replaces GB/T 9114.1~-9111.31988
This standard specifies the types and dimensions of raised face threaded steel pipe flanges with nominal pressure PN of 0.6, 1.0, 1.6, 2.5, 4.0MPa and nominal pressure PV of 2.0, 5.0.11.0, 15.0MPa. This standard applies to raised face threaded steel pipe flanges with nominal pressure PNO.6~PN15.0MPa. 2 Cited standards
The clauses contained in the following standards constitute the clauses of this standard through reference in this standard. The versions shown in the appendix of this standard are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T7306.1--200055\Sealing pipe threads Part 1: Cylindrical internal threads and tapered external threads (eqVIS()7-1:1994) (B/T7306.2--200055° Sealing pipe threads Part 2: Tapered internal threads and tapered external threads (cV1S()7-1:1994) GB/T91122000 Types and parameters of steel pipe flanges GB/T9124-2000 Technical conditions for steel pipe flanges GB/T12716-199160° tapered pipe threads 3 Types and sizes of flanges
3.1PN The type of PN0.6, PN1.0, PN1.6, PN2.5 and PN4.0MPa raised face with neck thread steel pipe flanges shall comply with the specifications of Figure 1, and the dimensions shall comply with the provisions of Tables 1 to 3.
3.2 The type of PN2.0 and PN5.0MPa raised face with neck thread steel pipe flanges shall comply with the provisions of Figure 2, and the dimensions shall comply with the provisions of Tables 4 and 5.
3.3 The type of PN11.0 and PN15.0MPa raised face with neck thread steel pipe flanges shall comply with the provisions of Figure 3, and the dimensions shall comply with the provisions of Tables 6 and 7.
4 Flange thread | |tt||4.1 PN0.6, PN1.0, PN1.6, PN2.5 and PN4.0MPa threaded flanges shall adopt 55° cylindrical pipe threads in accordance with GB/T7306.1 or 55° conical pipe threads in accordance with GB/T7306.2; PN2.0, PN5.0, PN11.0 and PV15.0MPa threaded flanges shall adopt 60° conical pipe threads in accordance with GB/T12716, except for special provisions. 4.2 The thread axis shall be concentric with the flange axis, and the deviation shall not exceed 5mm/m. PN0.6～PN4.0 MPa flanges without countersunk holes should have their threads chamfered to the major diameter of the threads on the back of the flange, with an angle of approximately 45° to the thread axis. PN5.0～PN15.0MPa flanges should have countersunk holes on the back, and the threads should be chamfered to the inner diameter of the countersunk holes, with an angle of approximately 45° to the thread axis. The chamfer of the thread and the chamfer of the head hole should be concentric with the thread
4.3 The inspection of the thread should comply with the provisions of the relevant standards. Approved by the State Administration of Quality and Technical Supervision in 2000-0928 54
2001~0701 implementation
5 Technical requirements for flanges
GB/T 9114 --- 2000
5.1 The technical requirements for flanges shall comply with the provisions of GB/9124. 5.2 The maximum non-impact working pressure of flanges at different temperatures shall comply with the provisions of Appendix A (Appendix to the standard) of GB/T9124·2000.
6 Marking
6.1 Flanges shall be marked according to nominal diameter, nominal pressure, sealing surface type code, thread characteristic code and standard number. 6.2 The type code of the flange sealing surface shall comply with the provisions of GB/T9112. 6.3 Marking example
Raised face steel pipe flange with neck thread (60° cone pipe thread) with nominal diameter 80mm and nominal pressure 5.0MPa (50bar): Flange DN80-PN50 RF (NPT) GB/T 9114--2000 Raised face neck threaded steel pipe method (55° cylindrical pipe thread) with nominal diameter 80mm and nominal pressure 1.0MPa (10bar): Flange DN80-PN10 RF (Rp) GB/T 9114 20002x
Figure 1 Raised face (RF) neck threaded steel arm flange (applicable to PN0.6, PN1.0, PN1.6, PN2.5 and PN4.0MFa)GB/T9114--2000
GB/T9114—2000
GB/T91142000
GB/T9114—2000
Figure 2 Raised face (RF) Neck threaded steel pipe flange (applicable to PN2.0 and PN5.0MPa)
Figure 3 Raised face (RF) neck threaded steel pipe flange (applicable to PN11.0 and PN15.0MPa)
9114-2000
mr-pmar
9114—2000
2—２
9114—2000
GB/T 9115.1~9115.4—2000
This standard is a revised version of GB/T9115.19115.36—1988 "Butt-welding steel pipe flange". This standard consists of the following 4 parts:
GB/T9115.1-2000 Flat and raised face welding steel pipe flanges GB/T9115.2-2000 Concave and convex face welding steel pipe flanges GB/T9115.3-2000 Grooved face welding steel pipe flanges GB/T9115.4-2000 Ring-joined face-welded steel pipe flanges This standard, based on reference to 1S07005-1:1992 "Metal Flanges Part 1: Steel Flanges" and other international and foreign advanced standards, combined with domestic use, has made the following modifications to the original standard: 1. The composition of the original standard has been greatly adjusted. From the original one flange type, one sealing surface type and one pressure level to form a standard, it has been changed to one flange type, one or two sealing surface types and all pressure levels to form a standard, thus compressing the original 36 standards to 4.
2. The content of the original standard has been greatly supplemented and expanded. In the original standard, the flange sizes of the pressure levels belonging to the European flange system are only six nominal pressure levels of PNO.25, PNO.6, PN1.0, PN1.6, PN2.5 and PN4.0MPa, and are only suitable for the connection of "British pipes", which cannot meet the use requirements. In addition to adding flange sizes for three nominal pressure levels of PN6.3, PN10.0 and PN16.0MPa, the revised flange standard also adds steel pipe sizes suitable for "metric pipe" connections, expanding the scope of application of the standard. 3 The pressure levels in the original standard have been appropriately adjusted. The two pressure levels PN10.0 and PN25.0MPa belonging to the American system were adjusted to PN11.0 and PN26.0MPa respectively according to ISO7005-1:1992. The purpose of the adjustment is to avoid confusion with the flange sizes of the corresponding pressure levels of the European flange system. 4 Some dimensions in the original standard, such as flange thickness, sealing surface dimensions, bolt specifications, bolt hole diameters, etc., have been appropriately modified according to ISO7005-1:1992.
5 The sealing surface "convex surface" in the original standard was changed to "raised surface", and the dimensions of flat and raised surface flanges were unified in one standard push. In this standard, the flange sizes of PN0.25, PNO.6, PN1.0, PN1.6, PN2.5, PN4.0, PN10.0 and PN16.0 MPa belong to the European flange system; the flange sizes of PN2.0, PN5.0, PN11.0, PN15.0, PN26.0 and PN42.0 MPa belong to the American flange system; these flange sizes are interchangeable with flange sizes of corresponding pressure levels in Europe and America. The flange sizes of PNO.25, PNO.6, PN1.0, PN1.6, PN2.5, PN4, 0 MPa (Series 1) and PN2.0, PN5.0, PN11.0, PN15.0, PN26.0.PN42.0 MPa in this standard are equivalent to the flange sizes of ISO7005-1:1992. The writing format of this standard is different from that of ISO7005-1:1992. The reason for adopting the current writing format is mainly to consider the convenience of use and the inheritance in the implementation of the standard.
This standard shall replace GB/T9115.1~9115.36-1988 from the date of implementation. This standard is under the jurisdiction of the National Technical Committee for Standardization of Pipeline Accessories. The drafting units of this standard are: Mechanical Science Research Institute, National Chemical Equipment Design Technology Center, Iron and Steel Design and Research Institute, Zhejiang Chaoda Valve Co., Ltd., Tianjin Jinding Pipeline Co., Ltd. The main drafters of this standard are: Li Junying, Yu Jun, Ying Daoyan, Shu Zonghan, Yu Fang, Qiu Xiaolai, Min Zhiqing, Wang Hanzhou. This standard was first issued in 1988 and revised for the first time in 2000. 64
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