This standard specifies the types and dimensions of metal ring gaskets for steel pipe flanges. This standard is applicable to metal ring gaskets for ring-connected sealing surfaces of steel pipe flanges with nominal diameters of DNl5 to DN900 and nominal pressures of PN2.0 MPa to PN42.0 MPa. GB/T 9128-2003 Dimensions of Metal Ring Gaskets for Steel Pipe Flanges GB/T9128-2003 Standard download decompression password: www.bzxz.net

GB/T9128-2003
This standard is a revision of GB/T9:28.1-198 Steel Pipe Flange Connection and GB/T9128.2-195
Steel Pipe Flange Connection. This standard adopts Chapter 4: Metal Gaskets in IS71%31913S07035 Dimensions of Gaskets for Flanges. The size part is equivalent to Chapter 4 of IS07483:199T standard. The main differences between this standard and international standards are: The marking method and examples of gaskets are added in the standard. Compared with GB/T9128.1-1988 and GB/T9128.2-199F, the main changes of this standard are as follows:
Based on IS0748,331, some sizes are modified and supplemented, and the application range of gaskets is expanded. This standard will replace GB/T9128.1-1988 and GB/T9128.2-1983 from the date of its implementation. This standard is proposed by China Machinery Industry Association. This standard is drafted by the National Pipeline Accessories Standardization Technical Committee, including the drafting units of this standard: Mechanical Materials Research Institute, East China University of Science and Technology. The main drafters of this standard: Chen Lin, Xie Suting. The previous versions of the standards replaced by this standard are: G/9128.1-J988:
GB/T 9128.2-1S8S.
1 Standard Pressure
Metal Ring Gaskets for Steel Pipe Flanges
This standard specifies the design and size of the joint ring gaskets for steel pipe flanges according to GU/T9128-2603
This standard applies to the steel pipe flanges with nominal diameter N15T>NSIU, public pressure PN2.MPr～PN42.0MI and the company's own open gasketsbzxZ.net
2 Normative Reference Documents
The following documents have become the provisions of this standard through reference in this standard. The referenced documents are marked as dated, and their subsequent modifications (excluding the contents of the quality control) or revised versions are not applicable to this standard. However, the parties who have reached an agreement on this standard may use the numerical versions of these documents. For all referenced documents without a date, the latest version shall apply to this standard. G%/T913J What are the technical conditions for the use of gaskets for connection (r.cqISO/DIS74&3) 3 Types and sizes of gaskets
3.1 The gaskets are divided into two types according to their shapes: angled and auxiliary. The total structure type is shown in the figure: 3.2 The gaskets shall comply with the requirements of Table 1
Only the specified gaskets
R-A72:
R -1. s mm (A2. X nm,;
R. -2,- mm <.1>22. 3 mr.
GB/T9128—2003
Ci Tong Jing
Table 1 Size of gaskets
39, 69
107,315
161,93
.r:. 45
190, 5g
13, 70
.E, 11
defense shape
19, c5
personal shape
child net shape ring
plane width
public period diameter
PN5C secondary
FN42 core
1(bag）
312,a0
381,n0
381,np
R8L, G3
469, 96
533, 46
E31:. 432
26, ER
GB/T9128—2003
Unit is m
15, 86
34, 93
Human re-shaped ring
Plain noble fake
-0, F1
GB/T9123—2003
Public boundary diameter DI
12, 155
Food method,
In addition to the state ring band, the flange is inspected with a ★ standard flange. 4 Marking
4.1 Marking method
Remember the internal package,
No type, ring number piece reduction brand and all piece standard number, 4.2 Operation example
355 23
The ring can be 20, the material is 0:19N:9 octagonal kitchen ring piece, H its mark is: A angle gasket R.ar-ot-19N9GR/T928
Gasket pulling technique fan material
Gasket + acceptance conditions see CBTU130
Ge Guozhi
22, 23
Eight fixed garbage
3R, t3
Year position is to send
Only the city's most square
100 grams
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