JB/T 1308.3-1999 JB/T 1308.3-1999 PN250a pipe end types, dimensions and technical requirements JB/T1308.3-1999 Standard download decompression password: www.bzxz.net

1C.S 23.060
Machinery Industry Standard of the People's Republic of China
JB/T1308.1-1308,21-1999
PN250MPa ultrahigh pressure valves and fittings
Technical conditions
Speclfcations for PN 2S0 MPa ultrahighpressure valves and fittings1999-07-12Release
State Machinery Industry Bureau
2000-01-01Implementation
Machinery Industry Standard of the People's Republic of China
PN250MPa pipe end
Type, dimensiongand technical conditions
This standard specifies the end type, size and technical requirements of super high stop pipes, JB/T13083-1999
Chengdu JB 1313 -73
This standard applies to the ends of pipes for neutral media such as ethylene and deep ethylene with a nominal pressure of PN250MPa. 2 Referenced standards
The texts included in the following standards constitute the provisions of this standard through reference in non-standards. When this standard is published, the versions shown are valid: All standards are subject to revision: All parties using this standard should explore the possibility of using the same versions of the following standards: GB/T3J993
GBT1961981
GBT197:1981bzxz.net
GR/T1RO4
IR/T1108.2—1999
3 Conclusion Configuration and size
General thread finish, shoulder distance, thread base size (diameter -600mm)
General thread effect tolerance and fit, diameter" -355mm tolerance linear dimension end tolerance
PV25MP door, pipe fittings and drawing technical conditions 3.1 The type of pipe end should be in the drawing. 13.5.
Maintain the negative
State Machinery Industry Bureau approved on July 32, 1999 and implemented on January 1, 2000
The provisions of the dimension table of pipe ends, nominal
pipe specification
(external ×)
21 × 6.5
35×11
50 ×16
c4 ×19.5
4Technical requirements
Screw system code
M10×1left 6g
M14x154-6g
M20×154-6g
M33×2left 6g
M48×2±-6g
M60×3left -6g
JB/T1308.3—999
The basic dimensions of the probe are in accordance with GBT196, the viscosity is in accordance with grade 6 specified in GB 1, the screw tooth profile is arc-shaped 4.1
4.2 The texture finishing is in accordance with GB 3.
4.3 The thread surface shall be free of cracks, depressions and other defects that affect strength, and the thread surface shall be free of defects that affect sealing. 4.4 The thread end and the inner diameter intersection of the pipe shall maintain a sharp angle and shall not have scratches, depressions and other defects that affect sealing. 4.5 The mechanical dimension tolerances specified in the technical specification shall comply with the provisions of GBT1804. 4.6 The thread grade part shall be staggered to prevent damage. 4. Other technical requirements shall comply with the provisions of GBT[3082.
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