JB/T 90-1994 Spiral wound gaskets for pipeline flanges

This standard replaces JB 90-59. JB/T 90-1994 Wound gasket for pipe flange JB/T90-1994 Standard download and decompression password: www.bzxz.net

J15 | | tt | | JB | Ministry of Industry
Issued
Implemented on 1995-10-01
Machinery Industry Standard of the People's Republic of China
Wrapped gaskets for pipe flanges
1 Subject content and scope of application
This standard specifies the type and size of spiral wound gaskets for pipeline flanges. This standard is applicable to relay-wound gaskets for pipeline flanges with a nominal pressure PN of 2.5~10.0MPa. 2 Reference standards
GB4622.3 Technical conditions for wound gaskets
3 Gasket types and code
3.1 The gasket type shall be as specified in Figure 1 and Table 1. a.
Basic type (Type A);
With inner ring type (Type B)|| tt||With outer ring type (C type);
With inner and outer ring type (D type)
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D,|| tt||Type A
Type B
Approved by the Ministry of Machinery Industry on 1994-12-09
JB/T90—94
Implemented on 1995-10-01
Gasket type
Basic type
With inner ring type||tt| |With outer ring type
With inner and outer ring type
Gasket size
4.1 Type A and B gasket sizes are as specified in Table 2. 4.2 Type C and D gasket sizes are as specified in Table 3, JB/T90—94
Type C||tt| |D
D type
Figure 1
Table 1
Generation|| tt||A
Applicable sealing surface type
Trough surface
Surface
Nominal diameter
200| |tt||250
nominal diameter
DN| |tt||10
65||tt ||80
Inner ring inner diameterwww.bzxz.net
108| |tt||133
480||tt ||530
inner ring inner diameter
45||tt ||57
JB/T 90-94
Table 2| |tt||Nominal pressure PN
Seam-wound pad inner diameter
43||tt ||51
4.0,6.3.10.0.16.0 MPa
Following pad outer diameter
65||tt ||75
Table 3
Nominal pressure PN||tt| |Inner diameter of burning pad
58|| tt||73
282||tt| |334
wound pad outer diameter
D||tt ||36
468| |tt||527
Yunwound pad thickness
3.2 and 4.5
2.5.4.0 MPa| |tt||Outer ring outer diameter D,
82||tt ||92
4. 0 MPa||tt| |46
544|| tt||569
wound pad thickness
3.2 and 4.5
Ring thickness
2 and 3
Outer ring thickness
2 and 3||tt| |5Technical Requirements
JB/T90-94
Gasket materials, dimensional tolerances, inspection rules, marking examples and other technical requirements should comply with GB4622.14622.3, additional explanation:
This standard is proposed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Machine Board Standardization Research Institute of the Ministry of Machinery Industry and Beijing Huaguang Seals Factory. The main drafters of this standard are Li Junmei, Ye Baolong and Li Xinhua. From the date of implementation of this standard, the original JB90-59 "Metal Gasket for Sealing Surface Lens Type Flange" is invalid. 107
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