JB/T 88-1994 Metal toothed gaskets for pipeline flanges

This standard replaces JB 88-59. This standard specifies the type, size and technical requirements for metal toothed gaskets for steel pipe flanges. This standard is applicable to metal toothed gaskets for butt-welded steel pipe flanges with concave and convex surface integral cast steel pipe flanges with a nominal pressure PN of 4.0~16.0MPa specified in JB/T 79 and JB/T 82. JB/T 88-1994 Metal toothed gasket for pipeline flange JB/T88-1994 Standard download and decompression password: www.bzxz.net

J15 | | tt | | JB | Ministry of Industry
Published
Implemented on 1995-10-01
Machinery Industry Standard of the People's Republic of China
Metal toothed gaskets for pipeline flanges
1 Subject content and applicable scope
This standard specifies the type, size and technical requirements of metal toothed gaskets for steel pipe flanges JB/T88—94
JB88-59| |tt||This standard applies to metal toothed gaskets for integral cast steel pipe flanges with concave and convex surfaces and butt welded pipe flanges with a nominal pressure PN of 4.0 to 16.0MPa specified in JB/T79 and JB/T82. Reference standards
GB4237
High-quality carbon structural steel hot-rolled thick steel plate and wide steel strip stainless steel hot-rolled steel plate
3 gaskets The type and size of
3.1 The type of metal tooth gasket used for the concave and convex surface pipe flange with nominal pressure PN of 4.0, 6.3, 10.0 and 16.0MPa is as specified in Figure 1, and the size is as specified in Table 1.
3.2 The type of metal toothed gasket used for the concave and convex surface pipe flange with a nominal pressure PN of 20.0MPa shall be as specified in Figure 1, and the dimensions shall be as specified in Table 2.
Figure 1
Approved by the Ministry of Machinery Industry on 1994-12-09
Implemented on 1995-10-01
nominal diameter
175|| tt||200
500||tt| |600
Gasket outer diameter
39||tt ||50
473| |tt||523
675/677
777/767
882/875
JB/T88-94
Table 1
nominal pressure PN
gasket inner diameter
27| |tt||35
155||tt ||185
Tooth pitch
2|| tt||2
4. 0,6.3,10. 0.16.0 MPa
top width||tt ||0. 2
0.3||tt ||0. 3
Forbidden film thickness
6||tt| |3
4|| tt||4
High||tt| |Toothbzxz.net
0. 65||tt| |0. 65
0.85||tt| |0. 85
Number of teeth
11|| tt||12
15||tt| |15
nominal diameter
15||tt| |20
Technical requirements
Gasket Outer diameter
318|| tt||Gasket inner diameter
St|| tt||72
227||tt| |258
JB/T88-94
Table 2
Nominal pressure PN
Tooth pitch
1.5||tt| |1.5
2| |tt||20.0MPa
Tooth width
0.3||tt| |0.3
Gasket thickness
3|| tt||8
4||tt| |4
0.65|| tt||0. 65
The gasket material and applicable temperature range should comply with Table 3, other technical requirements should comply with the provisions of the corresponding standards. Table 3
Material name
08 or 10
oCr19Ni9
00Cr17Ni12Mo2
Biaoxiong
GB711|| tt | |Limit deviation
Gasket outer diameter D.
Limit deviation
Highest working precision
600||tt| |450
Gasket thickness:
Limit deviation
4.3 The parallelism error of both ends of the metal toothed pad is per 100mm diameter The length shall not exceed 0.1mm. 4.4 The surface roughness R of the tooth surface of the metal toothed pad is 1.6 μm. 4.5 The metal toothed pad should be made of a whole steel plate, and tailor welding is not allowed. mm
Effect
8| |tt||o
15||tt ||mm
5 Marking and packaging
JB/T88-94
5.1 Gaskets should be packaged separately according to specifications and materials, and delivered The goods should be accompanied by a quality inspection certificate and labeled with the contents specified in Article 5.2. 5.2 Marking example
Metal toothed gasket for concave and convex surface pipe flange with nominal diameter 100mm, nominal pressure 6.3MPa, material 0Cr19Ni9: full tooth shape 100-630Cr19Ni9JB/T88-94 Additional instructions: ||tt ||This standard is proposed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Mechanical Standardization Research Institute of the Ministry of Machinery Industry and Beijing Huaguang Seals Factory. The drafters of this standard are Li Junying, Ye Baolong and Li Xinhua. 100
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