This standard specifies the plastic form and dimensions of concave and convex surface welded steel pipes with nominal pressures PN of 4.0, 6.3, 10.0, 16.0, and 20.0MPa. This standard is applicable to concave and convex face welded steel pipe flanges with nominal pressure PN 4.0~20.0MPa. JB/T 82.2-1994 Concave and convex surface welded steel pipe flange JB/T82.2-1994 Standard download and decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
Concave and convex surface steel pipe flange
Theme content and scope of application
JB/T 82.2..-94
Replaces JB8259
This standard specifies the formula and size of face welding steel pipe flanges with nominal pressure PN of 4.0.6.3.10.0 and 16.0.20.0MPa.
This standard is applicable to concave and convex face welded steel pipe flanges with nominal pressure PN4.0~20.0MPa. 2 Reference standard
JB/T74 pipeline flange technical conditions
3 The type and size of the method should comply with the regulations in Figure 1 and Tables 1 to 5. Type B
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Note: 1>The neck slope of PN16.0 and PN20.0MPa flanges is 1:2. Figure
The technical requirements of 4 flanges are in accordance with 3B/T74. 5. The nominal pressure of the cap and the maximum allowable working pressure at different temperatures are in accordance with the provisions of Appendix B of JB/T74. 6. Marking example
Convex welding with nominal diameter 300mm, nominal pressure 4.0MPa, size series 2 Steel pipe flange: Flange 300-40AJB/F82.2---94
Concave butt welding steel pipe flange with nominal diameter 300mm, nominal pressure 4.0MPa, size series 1: method Lan 300-40B (Series 1) JB/T82.2---94 Ministry of Machinery Industry of the People's Republic of China approved on 1994-12-09 for implementation on 1995-10-01
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