This standard specifies the dimensions of pipes, pipe fittings and valve ends for forged high-pressure valves with external thread connections and lens gasket-sealed threaded flange connections. This standard applies to pipes, pipe fittings and valve ends with nominal pressure pN16.0~32.0MPa and nominal diameter DN3~200mm. JB/T 2768-1992 PN16.0～32.0MPa pipe, pipe fittings, valve end dimensions JB/T2768-1992 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
PN16.0～～32.0 MPa pipe, pipe fittings, valve end dimensions
Subject content and scope of application
JB/T 2768 --- 92
Replaces JB27687S
This standard specifies the pipe, pipe fittings and valve end dimensions for forged high-pressure valves with external thread connections and lens gasket sealing threaded flange connections
This standard applies to pipes, pipe fittings and valve ends with nominal pressure PN16.032.0MPa and nominal diameter 1N3~~200mn2
Referenced standards
GB3 thread finish, shoulder distance, undercut, chamfer GB196 basic dimensions of common threads
GB197 tolerance and matching of common threads
JB/T450PN16.0~~32.0MPaForged Angle High-Pressure Valves, Fittings, and Closure Parts Technical Conditions 3 Structural Types and Dimensions
3.1 Types and dimensions of pipe fittings and valve ends connected with external threads. According to the provisions of Figure 1 and Table 1, CX159
Approved by the Ministry of Machinery and Electronics Industry of the People's Republic of China on July 20, 1992, the rest
19930101 implementation
Nominal pressure
Nominal diameter
Thread code
M24×1.5
M36×2
M48×2
JB/T 2768
The types and dimensions of pipes, fittings, and valve ends connected with threaded flanges shall be in accordance with the provisions of Figure 2 and Table 2. Table 2
Nominal pressure
Nominal diameter
Pipe specifications
Outer diameter
mm X mm
102 × 11 | 21
159×28
180×30
219x35
273×10
thread Code
M80×3
M100×3
M125×4
M155×4
M175 x 6
M33×2
M42×2
M48×2
M80×3
M100×3
M125X4
M153XA
M175X6
M215×6
M265X6
Technical requirements
JB/T27689
CX45°
20°+30
Others
The basic dimensions of the thread shall comply with the provisions of GB196, and the thread tolerance shall comply with the provisions of GB197. The thread end shall comply with the provisions of G133, and the bottom of the thread groove shall be round.bzxZ.net
5 Inspection rules
Ultrasonic and magnetic particle inspection shall comply with the provisions of JB/T450. Additional instructions:
This standard was proposed and managed by the Hefei General Machinery Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by the Hefei General Machinery Research Institute of the Ministry of Machinery and Electronics Industry. The main drafters of this standard are Huang Mingya and Wang Xiaojun.393
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